JKQTMathText: NEW: array/tabular-environments have limited support for formatting string like l|r|c and for \hline , \hdashline , \toprule , \midrule , \bottomrule

2024-12-25 01:51:49 +08:00 · 2022-08-12 12:54:10 +02:00 · 2022-08-12 12:54:10 +02:00 · 67579da1bc
commit 67579da1bc
parent cda22a9d7a
41 changed files with 856 additions and 209 deletions
--- a/doc/dox/jkqtmathtext_supportedlatex.dox
+++ b/doc/dox/jkqtmathtext_supportedlatex.dox
@ -184,12 +184,56 @@
    .
    
    
+    \section JKQTMathTextSuppoertedLaTeXTabular Tabular Environments
+    
+    \see Additional matrix-environments are listed in \ref
+
+    For text-mode tables, the \c tabular -environment is supported:
+      - <code>$\\begin{tabular}{COLSPEC} a & b & ...\\\\ c & d & ...\\end{tabular}$</code> 
+        \c COLSPEC is a LaTeX column specifier, i.e. a sequence composed of these parts:
+          - \c l : left-aligned column
+          - \c c : centered column
+          - \c r : right-aligned column
+          - \c | : single line
+          - \c || : double line
+          - \c : : single dashed line
+          - \c :: : double dashed line
+        .
+     .
+     In all these environments, you can use the following instructions to draw lines above/below a row in the matrix:
+       - \c \\hline or \c \\midrule: a single line     
+       - \c \\hline\\hline : a double line     
+       - \c \\toprule or \c \\bottomrule : a heavy line
+       - \c \\hdashline : a single dashed line
+       - \c \\hdashline\\hdashline : a double dashed line
+     .
+     
+     Here is an example:
+     \code
+      \begin{tabular}{:l|cr||}
+        \hdashline 
+        a1--- & b1--- & c1---\\ 
+        a2- & b2- & c2-\\
+        \hline 
+        a3 & b3 & c3\\
+        \hline\hline 
+        a4 & b4 & c4\\
+        \bottomrule
+      \end{tabular}
+     \endcode
+     
+     \image html  jkqtmathtext/jkqtmathtext_tabular.png
+
+    
    \section JKQTMathTextSuppoertedLaTeXMathSupport Supported Mathematical Constructs

    \subsection JKQTMathTextSuppoertedLaTeXSubSuper Sub- and Superscript
    The standard LaTeX sub-/superscript instructions (i.e. \c text_{sub} or \c text^{super} ) are supported:
      - \c ^{...} \c _{...} : display the contents of braces in superscript/subscript \image html jkqtmathtext/jkqtmathtext_supersub.png
        <br>Special subscript/superscript typesetting applies, when the sub/super follows \c \\sum \c \\Prod ...: \image html jkqtmathtext/jkqtmathtext_specialsubsuper.png
+      - <code>$\\substack[lrc]{...\\\\...}$</code> allows to e.g. subset several lines below a \c \\sum using \c \\sum\\limits_\\substack{a<5\\\\b<100}: \image html jkqtmathtext/jkqtmathtext_substack.png
+      - \c \\limits , \c \\nolimits : Several special symbols, like \c \\sum , \c \\lim , ... cause sub-/superscripts to be positioned below/above the symbol, not besides it. This behaviour can be altered by using \c \\limits and \c \\nolimits : \image html jkqtmathtext/jkqtmathtext_limits.png
+      
    .
 
    \subsection JKQTMathTextSuppoertedLaTeXBraces Braces/Parantheses ...
@ -235,27 +279,47 @@
    .

    \subsection JKQTMathTextSuppoertedLaTeXFrac Fraction Type Instructions
-    Several Matrix/Array-typed LaTeX instructions are supported:
+    Several fraction-typed LaTeX instructions are supported:
      - <code>$\\frac{...}{...}$</code> \image html jkqtmathtext/MTFMfrac.png
      - <code>$\\tfrac{...}{...}$</code> (70% smaller font) \image html jkqtmathtext/MTFMtfrac.png
      - <code>$\\dfrac{...}{...}$</code> \image html jkqtmathtext/MTFMdfrac.png
      - <code>$\\sfrac{...}{...}$</code> \image html jkqtmathtext/MTFMsfrac.png
      - <code>$\\stfrac{...}{...}$</code> (70% smaller font) \image html jkqtmathtext/MTFMstfrac.png
+      - <code>$\\stackrel{...}{...}$ $\\binom{...}{...}$</code> \image html jkqtmathtext/jkqtmathtext_brace_stackrel.png
   .

    \subsection JKQTMathTextSuppoertedLaTeXMatrix Matrix/Array Type Instructions
-    Several Matrix/Array-typed LaTeX instructions are supported:
+    Simple instructions are:
      - <code>$\\stackrel{...}{...}$ $\\binom{...}{...}$</code> \image html jkqtmathtext/jkqtmathtext_brace_stackrel.png
+    .
+
+    Several Matrix/Array-typed LaTeX instructions are supported:
      - <code>$\\begin{cases} ... & ... \\\\ ... & ... \\end{cases}$</code> \image html jkqtmathtext/jkqtmathtext_brace_begincases.png
-      - <code>$\\begin{array} a & b & ...\\\\ c & d & ...\\end{array}$</code> <code>$\\begin{matrix} a & b & ...\\\\ c & d & ...\\end{matrix}$</code> \image html jkqtmathtext/jkqtmathtext_array.png
+      - <code>$\\begin{matrix} a & b & ...\\\\ c & d & ...\\end{matrix}$</code> \image html jkqtmathtext/jkqtmathtext_matrix.png
      - <code>$\\begin{pmatrix} a & b & ...\\\\ c & d & ...\\end{pmatrix}$</code> \image html jkqtmathtext/jkqtmathtext_pmatrix.png
      - <code>$\\begin{bmatrix} a & b & ...\\\\ c & d & ...\\end{bmatrix}$</code> \image html jkqtmathtext/jkqtmathtext_bmatrix.png
      - <code>$\\begin{Bmatrix} a & b & ...\\\\ c & d & ...\\end{Bmatrix}$</code> \image html jkqtmathtext/jkqtmathtext_bbmatrix.png
      - <code>$\\begin{vmatrix} a & b & ...\\\\ c & d & ...\\end{vmatrix}$</code> \image html jkqtmathtext/jkqtmathtext_vmatrix.png
      - <code>$\\begin{Vmatrix} a & b & ...\\\\ c & d & ...\\end{Vmatrix}$</code> \image html jkqtmathtext/jkqtmathtext_vvmatrix.png
-      - <code>$\\substack[lrc]{...\\\\...}$</code> \image html jkqtmathtext/jkqtmathtext_substack.png
      - <code>$\\lsubstack{...\\\\...}$</code> \image html jkqtmathtext/jkqtmathtext_lsubstack.png
      - <code>$\\rsubstack{...\\\\...}$</code> \image html jkqtmathtext/jkqtmathtext_rsubstack.png
+      - <code>$\\begin{array}{COLSPEC} a & b & ...\\\\ c & d & ...\\end{array}$</code> \image html  jkqtmathtext/jkqtmathtext_array.png
+        \c COLSPEC is a LaTeX column specifier, i.e. a sequence composed of these parts:
+          - \c l : left-aligned column
+          - \c c : centered column
+          - \c r : right-aligned column
+          - \c | : single line
+          - \c || : double line
+          - \c : : single dashed line
+          - \c :: : double dashed line
+        .
+     .
+     In all these environments, you can use the following instructions to draw lines above/below a row in the matrix:
+       - \c \\hline or \c \\midrule: a single line     
+       - \c \\hline\\hline : a double line     
+       - \c \\toprule or \c \\bottomrule : a heavy line
+       - \c \\hdashline : a single dashed line
+       - \c \\hdashline\\hdashline : a double dashed line
     .

    
--- a/doc/dox/todo.dox
+++ b/doc/dox/todo.dox
@ -41,7 +41,6 @@ This page lists several todos and wishes for future version of JKQTPlotter
  <li>JKQTMathText:<ul>
    <li>check sub/superscript with italic text in math mode, possibly a correction is necessary</li>
    <li>explore options to make font-environment-modifying commands avails, like "{blacktext\\color{red}redtext}", today only commands like "\\textcolor{red}{redtext}" work</li>
-    <li>improve support for array-environment with limited support for formatting string like l|r|c and maybe add support for \\hline command, possibly also \\cellcolor etz.</li>
    <li></li>
  </ul></li>
 </ul>
--- a/doc/dox/whatsnew.dox
+++ b/doc/dox/whatsnew.dox
@ -89,6 +89,7 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
    <li>NEW: additional method JKQTMathtext::getSizeDetail() that returns all size-properties as a convenient struct, also added matching varinat JKQTMathTextNode::getSize() </li>
    <li>NEW: additional method JKQTMathtext::drawIntoPixmap(), JKQTMathtext::drawIntoPicture(), JKQTMathtext::drawIntoImage() which returns a QPixmap, QPicture and QImage respectively that contains the render result of the currently parsed markup</li>
    <li>NEW: added command line tool \ref JKQTMathTextRenderCmdLineTool that renders LaTeX into images, using it to generate the documentation images for JKQTMathText</li>
+    <li>NEW: array/tabular-environments have limited support for formatting string like \c l|r|c and for \c \\hline , \c \\hdashline , \c \\toprule , \c \\midrule , \c \\bottomrule</li>
  </ul></li>
 </ul>

--- a/doc/images/jkqtmathtext/jkqtmathtext_array.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_array.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_bbmatrix.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_bbmatrix.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_bmatrix.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_bmatrix.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_brace_array.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_brace_array.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_brace_begincases.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_brace_begincases.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_limits.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_limits.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_mathaccents.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_mathaccents.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_mathmode_and_textmode.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_mathmode_and_textmode.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_mathoperator_width_factor.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_mathoperator_width_factor.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_matrix.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_matrix.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_matrix_geometry.cdr
+++ b/doc/images/jkqtmathtext/jkqtmathtext_matrix_geometry.cdr
--- a/doc/images/jkqtmathtext/jkqtmathtext_matrix_geometry.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_matrix_geometry.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_pmatrix.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_pmatrix.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_tabular.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_tabular.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_textaccents.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_textaccents.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_vmatrix.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_vmatrix.png
--- a/doc/images/jkqtmathtext/jkqtmathtext_vvmatrix.png
+++ b/doc/images/jkqtmathtext/jkqtmathtext_vvmatrix.png
--- a/doc/jkqtmathtext_docimages_accents.jkmt
+++ b/doc/jkqtmathtext_docimages_accents.jkmt
@ -84,7 +84,7 @@ jkqtmathtext_mathdeco.png
 $\vec{x}\ \dot{x}\ \ddot{x}\ \overline{x}\ \underline{x}\ \hat{x}\ \tilde{x}\ \uul{x}\ \ool{x}\ \bar{x}\ \arrow{x}\ \widehat{x}\ \widetilde{x}\ ...$
 ---
 jkqtmathtext_textaccents.png
-\begin{array}
+\begin{array}{llll}
 {\backslash}"A: & \"A\"a & {\backslash}`A: & \`A\`a \\
 {\backslash}'A: & \'A\'a &{\backslash}{\circonflex}A: & \^A\^a \\
 {\backslash}{\sim}A: & \~A\~a &{\backslash}r\{A\}: & \r{A}\r{a} \\
@ -96,7 +96,7 @@ jkqtmathtext_textaccents.png
 \end{array}
 ---
 jkqtmathtext_mathaccents.png
-\begin{array}
+\begin{array}{llll}
 {\backslash}dot\{A\}: & $\dot{A}\dot{a}$ & {\backslash}ddot\{A\}: & $\ddot{A}\ddot{a}$ \\
 {\backslash}grave\{A\}: & $\grave{A}\grave{a}$ & {\backslash}acute\{A\}: & $\acute{A}\acute{a}$ \\
 {\backslash}acute\{A\}: & $\acute{A}\acute{a}$ & {\backslash}tilde\{A\}: & $\tilde{A}\tilde{a}$ \\
--- a/doc/jkqtmathtext_docimages_braces.jkmt
+++ b/doc/jkqtmathtext_docimages_braces.jkmt
@ -1,7 +1,4 @@
 ---
-jkqtmathtext_brace_array.png
-$\left\langle\begin{array}a&b&...\\ c&d&...\end{array}\right\rangle$
---
 jkqtmathtext_brace_bbig.png
 $\Bigl[\Bigl(r^{123}\Bigr)\Bigr]$
 ---
--- a/doc/jkqtmathtext_docimages_math.jkmt
+++ b/doc/jkqtmathtext_docimages_math.jkmt
@ -28,8 +28,11 @@ jkqtmathtext_substack.png
 {\backslash}substack: $\sum\limits_\substack{0\leq i\leq10\\-5\leq j\leq1000}f_{i,j}$
 ---
 jkqtmathtext_mathmode_and_textmode.png
-\begin{array}text: & abc123+d/e\\ math: & $abc123+d/e$\end{array}
+\begin{matrix}text: & abc123+d/e\\ math: & $abc123+d/e$\end{matrix}
 ---
 jkqtmathtext_mathoperator_width_factor.png
 --showboxes
-\begin{array}Math: $a=b$ & text: a=b\\\textcolor{blue}{extra space}&\textcolor{blue}{normal spacing}\end{array}
+\begin{matrix}Math: $a=b$ & text: a=b\\\textcolor{blue}{extra space}&\textcolor{blue}{normal spacing}\end{matrix}
+---
+jkqtmathtext_limits.png
+no specifier: $\sum_{i=0}^\infty k_i^2\ \ \lim_{x\rightarrow0}f(x)\ \ \nabla_{x}f(x)$ \ \ \ \ \ {\backslash}limits: $\sum\limits_{i=0}^\infty k_i^2\ \ \lim\limits_{x\rightarrow0}f(x)\ \ \nabla\limits_{x}f(x)$ \ \ \ \ \ {\backslash}nolimits: $\sum\nolimits_{i=0}^\infty k_i^2\ \ \lim\nolimits_{x\rightarrow0}f(x)\ \ \nabla\nolimits_{x}f(x)$ 
--- a/doc/jkqtmathtext_docimages_matrix.jkmt
+++ b/doc/jkqtmathtext_docimages_matrix.jkmt
@ -1,6 +1,6 @@
 ---
-jkqtmathtext_array.png
-$\begin{array}a&b&...\\ c&d&...\end{array}$
+jkqtmathtext_matrix.png
+$\mat{M}_1=\begin{matrix}a&b&...\\ c&d&...\end{matrix}\ \ \ \ \ \ \mat{M}_2=\left\langle\begin{matrix}a&b&...\\ c&d&...\end{matrix}\right\rangle$
 ---
 jkqtmathtext_bmatrix.png
 $\begin{bmatrix}a&b&...\\ c&d&...\end{bmatrix}$
@ -18,4 +18,30 @@ jkqtmathtext_vvmatrix.png
 $\begin{Vmatrix}a&b&...\\ c&d&...\end{Vmatrix}$
 ---
 jkqtmathtext_brace_begincases.png
-$f(x)=\begin{cases}\sfrac{1}{2} & \text{if} 0\leq x\leq 1 \\ \sfrac{2}{3} & \text{if} 3\leq x\leq 4 \\ 0 & \text{elsewhere} \end{cases}$
+$f(x)=\begin{cases}\sfrac{1}{2} & \text{if}\ 0\leq x\leq 1 \\ \sfrac{2}{3} & \text{if}\ 3\leq x\leq 4 \\ 0 & \text{elsewhere} \end{cases}$
+---
+jkqtmathtext_tabular.png
+\begin{tabular}{:l|cr||}
+  \hdashline 
+  a1--- & b1--- & c1---\\ 
+  a2- & b2- & c2-\\
+  \hline 
+  a3 & b3 & c3\\
+  \hline\hline 
+  a4 & b4 & c4\\
+  \bottomrule
+\end{tabular}
+---
+jkqtmathtext_array.png
+$\mat{M}_\cdot=\begin{array}{l:ll}
+  \alpha & a & \ldots \\
+  \hdashline
+  \beta & b & \ldots \\
+  \vdots & \vdots & \ddots \\
+\end{array}
+\ \ \ \ \ \mat{M}_{()}=\left(\begin{array}{l:ll}
+  \alpha & a & \ldots \\
+  \hdashline
+  \beta & b & \ldots \\
+  \vdots & \vdots & \ddots \\
+\end{array}\right)$
--- a/examples/jkqtmathtext_test/testform.cpp
+++ b/examples/jkqtmathtext_test/testform.cpp
@ -97,6 +97,8 @@ TestForm::TestForm(QWidget *parent) :
    ui->cmbTestset->addItem("text: framed", "\\begin{framed}text\\\\\\textbf{2^{nd} line of text}\\\\last \\textit{line!} $\\frac{1}{2}$\\end{framed}");
    ui->cmbTestset->addItem("text: shaded", "\\begin{shaded}text\\\\\\textbf{2^{nd} line of text}\\\\last \\textit{line!} $\\frac{1}{2}$\\end{shaded}");
    ui->cmbTestset->addItem("text: snugshade", "\\begin{snugshade}text\\\\\\textbf{2^{nd} line of text}\\\\last \\textit{line!} $\\frac{1}{2}$\\end{snugshade}");
+    ui->cmbTestset->addItem("text: tabular", "\\begin{tabular}{:l|cr||}\\hdashline a1--- & b1-- & c1---\\\\ a2-- & b2\\_ & c2\\_\\\\\\hline a3 & b3 & c3\\\\\\hline\\hline a4 & b4 & c4\\\\\\bottomrule\\end{tabular}");
+    ui->cmbTestset->addItem("math: array", "$\\mat{M}=\\left(\\begin{array}{l:ll} \\alpha & a & \\ldots \\\\ \\hdashline \\beta & b & \\ldots \\\\ \\vdots & \\vdots & \\ddots \\\\ \\end{array}\\right)$");
    ui->cmbTestset->addItem("mathtest", "This is normal text: $this is math:\\langle r^2(\\tau)\\rangle=\\left\\langle (\\vec{r}(t)-\\vec{r}(t+\\tau) )^2\\right\\rangle\\ \\ \\ g(\\tau)=\\frac{1}{N}\\cdot\\left(1+\\frac{2}{3}\\frac{\\langle r^2(\\tau)\\rangle}{w_{xy}^2}\\right)^{-1}  \\lfloor\\rfloor\\lceil\\rceil\\langle\\rangle\\left\\{\\vec{a}\\left|\\|\\vec{a}\\|_2\\geq2\\right.\\right\\} \\vec{r}\\vec{R}\\frac{\\sqrt{\\sqrt{\\sqrt{\\sum_{i=0}^\\infty \\hat{i}^2}+y^\\alpha}+1}}{\\dot{v}\\equiv\\ddot{r}}\\argmin_{\\vec{k}}\\sum_{\\sqrt{i}=0}^{N}\\int_{x_0}^{x_1}\\left(\\left(\\left(x\\right)\\right)\\right)\\underbrace{\\left[\\left\\{\\frac{\\partial f}{\\partial x}\\right\\}\\cdot\\frac{1}{2}\\right]}{\\text{underbraced text \\hbar}}\\cdots\\frac{\\sqrt{\\sum_{i=0}^2 \\hat{i}^2}+y^\\alpha}{\\dot{v}\\equiv\\ddot{r}}, \\hat{t}\\hat{T} \\overbrace{\\left|\\sqrt{x\\cdot Y}\\right|}{\\propto\\bbN\\circ\\bbZ}   \\left<\\arrow{x(\\tau)}\\cdot\\vec{R}(t+\\bar{\\tau})\\right>   \\alpha\\beta\\gamma\\delta\\epsilon\\Gamma\\Delta\\Theta\\Omega  \\left\\_\\left~\\cbrt{\\hbar\\omega}\\right~\\right\\_$");
    ui->cmbTestset->addItem("math: upper/lower parantheses test:", "$\\text{bblabla} \\frac{1}{2}\\cdot\\left(\\frac{1}{\\mathrm{e}^x+\\mathrm{e}^{-x}}\\right)\\cdot\\left(\\frac{1}{\\frac{1+2}{5+x}}\\right)\\cdot\\left(\\frac{1}{\\exp\\left[-\\frac{y^2}{\\sqrt{x}}\\right]\\cdot\\exp\\left[-\\frac{1}{\\frac{1}{2}}\\right]}\\right) $");
    ui->cmbTestset->addItem("math: ACF test", "$g_{rg}^{ab}(\\tau)=\\frac{1}{N}\\cdot\\left(1+\\frac{2}{3}\\frac{\\langle r^2(\\tau)\\rangle}{w_{xy}^2}\\right)^{-1}\\cdot\\left(1+\\frac{2}{3}\\frac{\\langle r^2(\\tau)\\rangle}{w_{xy}^2}\\right)^{-\\frac{1}{2}}$");
--- a/lib/jkqtmathtext/jkqtmathtext.cpp
+++ b/lib/jkqtmathtext/jkqtmathtext.cpp
@ -99,6 +99,14 @@ JKQTMathText::JKQTMathText(QObject* parent):
    sqrt_height_factor=1.2;
    sqrt_smallfont_factor=0.57;

+    matrix_linewidth_thin_factor=0.4;
+    matrix_linewidth_heavy_factor=1.5;
+    matrix_line_separation_factor=2.0;
+    matrix_xSeparation_factor=0.5;
+    matrix_ySeparation_factor=0.5;
+    matrix_xPadding_factor=0.5;
+    matrix_yPadding_factor=0.5;
+
    blackboradFontMode=MTBBDMdefault;


@ -231,6 +239,13 @@ void JKQTMathText::loadSettings(const QSettings& settings, const QString& group)
    bigmathoperator_font_factor=settings.value(group+"bigmathoperator_font_factor", bigmathoperator_font_factor).toDouble();
    frac_nested_factor=settings.value(group+"frac_nested_factor", frac_nested_factor).toDouble();

+    matrix_linewidth_thin_factor=settings.value(group+"matrix_linewidth_thin_factor", matrix_linewidth_thin_factor).toDouble();
+    matrix_linewidth_heavy_factor=settings.value(group+"matrix_linewidth_heavy_factor", matrix_linewidth_heavy_factor).toDouble();
+    matrix_line_separation_factor=settings.value(group+"matrix_line_separation_factor", matrix_line_separation_factor).toDouble();
+    matrix_xSeparation_factor=settings.value(group+"matrix_xSeparation_factor", matrix_xSeparation_factor).toDouble();
+    matrix_ySeparation_factor=settings.value(group+"matrix_ySeparation_factor", matrix_ySeparation_factor).toDouble();
+    matrix_xPadding_factor=settings.value(group+"matrix_xPadding_factor", matrix_xPadding_factor).toDouble();
+    matrix_yPadding_factor=settings.value(group+"matrix_yPadding_factor", matrix_yPadding_factor).toDouble();

    if (settings.value(group+"use_stix_fonts", false).toBool()) useSTIX();
    if (settings.value(group+"use_xits_fonts", false).toBool()) useXITS();
@ -272,6 +287,13 @@ void JKQTMathText::saveSettings(QSettings& settings, const QString& group) const
    settings.setValue(group+ "sqrt_smallfont_factor", sqrt_smallfont_factor);
    settings.setValue(group+ "bigmathoperator_font_factor", bigmathoperator_font_factor);
    settings.setValue(group+ "frac_nested_factor", frac_nested_factor);
+    settings.setValue(group+ "matrix_linewidth_thin_factor", matrix_linewidth_thin_factor);
+    settings.setValue(group+ "matrix_linewidth_heavy_factor", matrix_linewidth_heavy_factor);
+    settings.setValue(group+ "matrix_line_separation_factor", matrix_line_separation_factor);
+    settings.setValue(group+ "matrix_xSeparation_factor", matrix_xSeparation_factor);
+    settings.setValue(group+ "matrix_ySeparation_factor", matrix_ySeparation_factor);
+    settings.setValue(group+ "matrix_xPadding_factor", matrix_xPadding_factor);
+    settings.setValue(group+ "matrix_yPadding_factor", matrix_yPadding_factor);
 }

 bool JKQTMathText::useSTIX(bool mathModeOnly) {
@ -966,6 +988,76 @@ double JKQTMathText::getSqrtSmallFontFactor() const
    return sqrt_smallfont_factor;
 }

+double JKQTMathText::getMatrixLinewidthThinFactor()
+{
+    return matrix_linewidth_thin_factor;
+}
+
+void JKQTMathText::setMatrixLinewidthThinFactor(double factor)
+{
+    matrix_linewidth_thin_factor=factor;
+}
+
+double JKQTMathText::getMatrixLinewidthHeavyFactor()
+{
+    return matrix_linewidth_heavy_factor;
+}
+
+void JKQTMathText::setMatrixLinewidthHeavyFactor(double factor)
+{
+    matrix_linewidth_heavy_factor=factor;
+}
+
+double JKQTMathText::getMatrixLineSeparationFactor()
+{
+    return matrix_line_separation_factor;
+}
+
+void JKQTMathText::setMatrixLineSeparationFactor(double factor)
+{
+    matrix_line_separation_factor=factor;
+}
+
+double JKQTMathText::getMatrixXSeparationFactor()
+{
+    return matrix_xSeparation_factor;
+}
+
+void JKQTMathText::setMatrixXSeparationFactor(double factor)
+{
+    matrix_xSeparation_factor=factor;
+}
+
+double JKQTMathText::getMatrixYSeparationFactor()
+{
+    return matrix_ySeparation_factor;
+}
+
+void JKQTMathText::setMatrixYSeparationFactor(double factor)
+{
+    matrix_ySeparation_factor=factor;
+}
+
+double JKQTMathText::getMatrixXPaddingFactor()
+{
+    return matrix_xPadding_factor;
+}
+
+void JKQTMathText::setMatrixXPaddingFactor(double factor)
+{
+    matrix_xPadding_factor=factor;
+}
+
+double JKQTMathText::getMatrixYPaddingFactor()
+{
+    return matrix_yPadding_factor;
+}
+
+void JKQTMathText::setMatrixYPaddingFactor(double factor)
+{
+    matrix_yPadding_factor=factor;
+}
+
 void JKQTMathText::setUseUnparsed(bool __value)
 {
    this->useUnparsed = __value;
@ -1531,6 +1623,7 @@ void JKQTMathText::giveBackToTokenizer(size_t count)
 }

 JKQTMathTextNode* JKQTMathText::parseLatexString(bool get, JKQTMathTextBraceType quitOnClosingBrace, const QString& quitOnEnvironmentEnd, bool quitOnClosingBracket) {
+    QMap<QString,size_t> countLine;
    //std::cout<<"    entering parseLatexString()\n";
    JKQTMathTextHorizontalListNode* nl=new JKQTMathTextHorizontalListNode(this);
    if (get) getToken();
@ -1593,6 +1686,12 @@ JKQTMathTextNode* JKQTMathText::parseLatexString(bool get, JKQTMathTextBraceType
                if (nl->hasChildren()) nl->getLastChild()->setSubSuperscriptAboveBelowNode(true);
            } else  if (currentInstructionName=="nolimits") {
                if (nl->hasChildren()) nl->getLastChild()->setSubSuperscriptAboveBelowNode(false);
+            } else  if (currentInstructionName=="hline" || currentInstructionName=="midrule") {
+                countLine["hline"]=countLine.value("hline",0)+1;
+            } else  if (currentInstructionName=="hdashline") {
+                countLine["hdashline"]=countLine.value("hdashline",0)+1;
+            } else  if (currentInstructionName=="toprule" || currentInstructionName=="bottomrule") {
+                countLine["heavyline"]=countLine.value("heavyline",0)+1;
            } else if (currentInstructionName=="right") {
                getToken();
                if (currentToken==MTTtext) {
@ -1717,34 +1816,89 @@ JKQTMathTextNode* JKQTMathText::parseLatexString(bool get, JKQTMathTextBraceType

        } else if (currentToken==MTTinstructionBegin) {
            const QString envname=currentTokenName;
-            if (envname=="matrix" || envname=="array" || envname=="aligned" || envname=="align" || envname=="cases" || envname=="pmatrix"|| envname=="bmatrix"|| envname=="Bmatrix"|| envname=="vmatrix"|| envname=="Vmatrix") {
+            if (envname=="matrix" || envname=="array" || envname=="aligned" || envname=="align" || envname=="cases" || envname=="pmatrix"|| envname=="bmatrix"|| envname=="Bmatrix"|| envname=="vmatrix"|| envname=="Vmatrix" || envname=="tabular") {
+                QString colspec="";
+                if (envname=="tabular" || envname=="array") {
+                    if (getToken()==MTTopenbrace) {
+                        colspec=readUntil(true, "}");
+                    } else {
+                        error_list.append(tr("error @ ch. %1: expected {COLUMNSPEC} after '\\begin{%2}'").arg(currentTokenID).arg(envname));
+                    }
+                }
+                JKQTMathTextMatrixNode* matrixNode=new JKQTMathTextMatrixNode(this, colspec);
                QVector< QVector<JKQTMathTextNode*> > items;
                //int lines=0;
                //int cols=0;
                bool first=true;
+                bool firstLine=true;
                QVector<JKQTMathTextNode*> line;
+                size_t colCount=0;
                //std::cout<<"found \\begin{matrix}\n";
                while (first || currentToken==MTTampersand || currentToken==MTTinstructionNewline) {
-                    JKQTMathTextNode* it=parseLatexString(true, MTBTAny, envname);
+                    while (getToken()==MTTwhitespace) ; // eat whitespace
+                    JKQTMathTextNode* it=simplifyAndTrimJKQTMathTextNode(parseLatexString(false, MTBTAny, envname));
+                    if (firstLine) {
+                        if (lastLineCount.value("hline",0)==1) {
+                            matrixNode->setTopLine(JKQTMathTextMatrixNode::LTline);
+                        } else if (lastLineCount.value("hline",0)>1) {
+                            matrixNode->setTopLine(JKQTMathTextMatrixNode::LTdoubleline);
+                        } else if (lastLineCount.value("heavyline",0)>0) {
+                            matrixNode->setTopLine(JKQTMathTextMatrixNode::LTheavyline);
+                        } else if (lastLineCount.value("hdashline",0)==1) {
+                            matrixNode->setTopLine(JKQTMathTextMatrixNode::LTdashed);
+                        } else if (lastLineCount.value("hdashline",0)>1) {
+                            matrixNode->setTopLine(JKQTMathTextMatrixNode::LTdoubleDashed);
+                        }
+                    } else {
+                        if (lastLineCount.value("hline",0)==1) {
+                            matrixNode->setRowBottomLine(items.size()-1, JKQTMathTextMatrixNode::LTline);
+                        } else if (lastLineCount.value("hline",0)>1) {
+                            matrixNode->setRowBottomLine(items.size()-1, JKQTMathTextMatrixNode::LTdoubleline);
+                        } else if (lastLineCount.value("heavyline",0)>0) {
+                            matrixNode->setRowBottomLine(items.size()-1, JKQTMathTextMatrixNode::LTheavyline);
+                        } else if (lastLineCount.value("hdashline",0)==1) {
+                            matrixNode->setRowBottomLine(items.size()-1, JKQTMathTextMatrixNode::LTdashed);
+                        } else if (lastLineCount.value("hdashline",0)>1) {
+                            matrixNode->setRowBottomLine(items.size()-1, JKQTMathTextMatrixNode::LTdoubleDashed);
+                        }
+                    }
                    if (currentToken==MTTampersand) {
                        //std::cout<<"  appending item\n";
                        line.append(it);
                    } else {
-                        line.append(it);
                        //std::cout<<"  appending item and line with "<<line.size()<<" items.\n";
+                        if (currentToken==MTTinstructionEnd) {
+                            JKQTMathTextMultiChildNode* mnc=dynamic_cast<JKQTMathTextMultiChildNode*>(it);
+                            if (mnc && mnc->childCount()>0) {
+                                line.append(it);
+                            } else {
+                                line.append(it);
+                            }
+                        } else {
+                            line.append(it);
+                        }
+                        if (currentToken==MTTinstructionNewline || line.size()>0) {
+                            colCount=qMax(colCount, static_cast<size_t>(line.size()));
+                            if (line.size()==0 || (line.size()>1 && line.size()==colCount)) {
                                items.append(line);
+                            } else if (line.size()>1 && line.size()!=colCount) {
+                                error_list.append(tr("error @ ch. %1: wrong number of entries widthin '\\begin{%2}...\\end{%2}'").arg(currentTokenID).arg(envname));
+                            }
+                        }
                        line.clear();
+                        firstLine=false;
                    }
                    first=false;
                }
                //std::cout<<"  creating matrix-node with "<<items.size()<<" items.\n";
-                if (envname=="pmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTParenthesis, MTBTParenthesis, new JKQTMathTextMatrixNode(this, items)));
-                else if (envname=="cases") nl->addChild(new JKQTMathTextBraceNode(this, MTBTCurlyBracket, MTBTNone, new JKQTMathTextMatrixNode(this, items)));
-                else if (envname=="bmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTSquareBracket, MTBTSquareBracket, new JKQTMathTextMatrixNode(this, items)));
-                else if (envname=="Bmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTCurlyBracket, MTBTCurlyBracket, new JKQTMathTextMatrixNode(this, items)));
-                else if (envname=="vmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTSingleLine, MTBTSingleLine, new JKQTMathTextMatrixNode(this, items)));
-                else if (envname=="Vmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTDoubleLine, MTBTDoubleLine, new JKQTMathTextMatrixNode(this, items)));
-                else nl->addChild(new JKQTMathTextMatrixNode(this, items));
+                matrixNode->setChildren(items);
+                if (envname=="pmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTParenthesis, MTBTParenthesis, matrixNode));
+                else if (envname=="cases") nl->addChild(new JKQTMathTextBraceNode(this, MTBTCurlyBracket, MTBTNone, matrixNode));
+                else if (envname=="bmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTSquareBracket, MTBTSquareBracket, matrixNode));
+                else if (envname=="Bmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTCurlyBracket, MTBTCurlyBracket, matrixNode));
+                else if (envname=="vmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTSingleLine, MTBTSingleLine, matrixNode));
+                else if (envname=="Vmatrix") nl->addChild(new JKQTMathTextBraceNode(this, MTBTDoubleLine, MTBTDoubleLine, matrixNode));
+                else nl->addChild(matrixNode);
                //std::cout<<"  creating matrix-node ... done!\n";
            } else if (envname=="center" || envname=="document" || envname=="flushleft" || envname=="flushright") {
                JKQTMathTextHorizontalAlignment alignment=MTHALeft;
@ -1795,6 +1949,8 @@ JKQTMathTextNode* JKQTMathText::parseLatexString(bool get, JKQTMathTextBraceType
        if (getNew) getToken();
    }
    //std::cout<<"    leaving parseLatexString()\n";
+    lastLineCount=countLine;
+
    return simplifyJKQTMathTextNode(nl);
 }

@ -2126,6 +2282,8 @@ bool JKQTMathText::parse(const QString& text, bool addSpaceBeforeAndAfter){
    currentToken=MTTnone;
    currentTokenName="";
    parsingMathEnvironment=false;
+    lastLineCount.clear();
+
    error_list.clear();
    parsedNode=parseLatexString(true);
    unparsedNode=new JKQTMathTextVerbatimNode(this, text);
--- a/lib/jkqtmathtext/jkqtmathtext.h
+++ b/lib/jkqtmathtext/jkqtmathtext.h
@ -606,6 +606,35 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathText : public QObject {
        /** \copydoc sqrt_smallfont_factor */
        double getSqrtSmallFontFactor() const;

+        /** \copydoc matrix_linewidth_thin_factor */
+        double getMatrixLinewidthThinFactor();
+        /** \copydoc matrix_linewidth_thin_factor */
+        void setMatrixLinewidthThinFactor(double factor);
+        /** \copydoc matrix_linewidth_heavy_factor */
+        double getMatrixLinewidthHeavyFactor();
+        /** \copydoc matrix_linewidth_heavy_factor */
+        void setMatrixLinewidthHeavyFactor(double factor);
+        /** \copydoc matrix_line_separation_factor */
+        double getMatrixLineSeparationFactor();
+        /** \copydoc matrix_line_separation_factor */
+        void setMatrixLineSeparationFactor(double factor);
+        /** \copydoc matrix_xSeparation_factor */
+        double getMatrixXSeparationFactor();
+        /** \copydoc matrix_xSeparation_factor */
+        void setMatrixXSeparationFactor(double factor);
+        /** \copydoc matrix_ySeparation_factor */
+        double getMatrixYSeparationFactor();
+        /** \copydoc matrix_ySeparation_factor */
+        void setMatrixYSeparationFactor(double factor);
+        /** \copydoc matrix_xPadding_factor */
+        double getMatrixXPaddingFactor();
+        /** \copydoc matrix_xPadding_factor */
+        void setMatrixXPaddingFactor(double factor);
+        /** \copydoc matrix_yPadding_factor */
+        double getMatrixYPaddingFactor();
+        /** \copydoc matrix_yPadding_factor */
+        void setMatrixYPaddingFactor(double factor);
+


        /** \copydoc useUnparsed */ 
@ -798,6 +827,43 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathText : public QObject {
        double sqrt_width_Xfactor;
        /** \brief height-increase of the sqrt-symbol, as factor of the child's height */
        double sqrt_height_factor;
+
+        /** \brief width of thin table lines, this factor is multiplied with the current \c font.linewidth()
+         *
+         *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+         */
+        double matrix_linewidth_thin_factor;
+        /** \brief width of heavy table lines, this factor is multiplied with the current \c font.linewidth()
+         *
+         *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+         */
+        double matrix_linewidth_heavy_factor;
+        /** \brief separation of double-lines in tables, this factor is multiplied with the \c font.linewidth()
+         *
+         *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+         */
+        double matrix_line_separation_factor;
+        /** \brief x-separation of  two columns, this factor is multiplied with the \c font.width("x")
+         *
+         *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+         */
+        double matrix_xSeparation_factor;
+        /** \brief y-separation of  two columns, this factor is multiplied with the \c font.width("x")
+         *
+         *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+         */
+        double matrix_ySeparation_factor;
+        /** \brief x-padding of  two columns, this factor is multiplied with the \c font.width("x")
+         *
+         *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+         */
+        double matrix_xPadding_factor;
+        /** \brief y-padding of  two columns, this factor is multiplied with the \c font.width("x")
+         *
+         *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+         */
+        double matrix_yPadding_factor;
+
        /** \brief a list that will be filled with error messages while parsing, if any error occur
         *
         *  This list of errors is (mostly) filled during a call to parse(). During rendering (e.g. with draw() )
@ -891,6 +957,8 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathText : public QObject {
        tokenType currentToken;
        /** \brief the JKQTMathTextBraceType associated with the last \c \\right command the parser encountered */
        JKQTMathTextBraceType lastRightBraceType;
+        /**  \brief returns the number of \c \\hline , \c \\hdashline , ... commands in the last parseLatexString() call */
+        QMap<QString,size_t> lastLineCount;
        /** \brief used by the tokenizer. Name of the current token, id applicable */
        QString currentTokenName;
        /** \brief used by the tokenizer. Points to the currently read character in parseString */
--- a/lib/jkqtmathtext/nodes/jkqtmathtextlistnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextlistnode.cpp
@ -553,6 +553,14 @@ void JKQTMathTextHorizontalListNode::clearChildren(bool deleteChildren)
    clearChildrenImpl(deleteChildren);
 }

+void JKQTMathTextHorizontalListNode::deleteChild(int i)
+{
+    if (i>=0 && i<nodes.size()) {
+        delete nodes[i];
+        nodes.remove(i);
+    }
+}
+
 JKQTMathTextNode *JKQTMathTextHorizontalListNode::getChild(int i)
 {
    return nodes[i];
@ -748,6 +756,13 @@ void JKQTMathTextVerticalListNode::clearChildrenImpl(bool deleteChildren)
    nodes.clear();
 }

+void JKQTMathTextVerticalListNode::deleteChild(int i)
+{
+    if (i>=0 && i<nodes.size()) {
+        delete nodes[i];
+        nodes.remove(i);
+    }
+}
 void JKQTMathTextVerticalListNode::clearChildren(bool deleteChildren)
 {
    clearChildrenImpl(deleteChildren);
--- a/lib/jkqtmathtext/nodes/jkqtmathtextlistnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextlistnode.h
@ -60,6 +60,8 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextHorizontalListNode: public JKQTMathTex
        virtual int childCount() const override;
        /** \copydoc JKQTMathTextMultiChildNode::clearChildren() */
        virtual void clearChildren(bool deleteChildren=true) override;
+        /** \copydoc JKQTMathTextMultiChildNode::deleteChild() */
+        virtual void deleteChild(int i) override;
        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
        virtual JKQTMathTextNode* getChild(int i) override;
        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
@ -122,6 +124,8 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextVerticalListNode: public JKQTMathTextM
        virtual int childCount() const override;
        /** \copydoc JKQTMathTextMultiChildNode::clearChildren() */
        virtual void clearChildren(bool deleteChildren=true) override;
+        /** \copydoc JKQTMathTextMultiChildNode::deleteChild() */
+        virtual void deleteChild(int i) override;
        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
        virtual JKQTMathTextNode* getChild(int i) override;
        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
--- a/lib/jkqtmathtext/nodes/jkqtmathtextmatrixnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextmatrixnode.cpp
@ -38,8 +38,41 @@



-JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText* _parent, QVector<QVector<JKQTMathTextNode*> > children):
-    JKQTMathTextNode(_parent)
+JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText* _parent, const QVector<QVector<JKQTMathTextNode *> > &children, const QString &columnSpec):
+    JKQTMathTextNode(_parent),
+    verticalLineRHSColumn(),
+    verticalLineLeft(LTnone),
+    horizontalLineBottomRow(),
+    horizontalLineTop(LTnone),
+    columns(0),
+    lines(0)
+{
+    setChildren(children);
+    parseColumnSpec(columnSpec);
+}
+
+JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText *_parent, const QString &columnSpec):
+    JKQTMathTextNode(_parent),
+    verticalLineRHSColumn(),
+    verticalLineLeft(LTnone),
+    horizontalLineBottomRow(),
+    horizontalLineTop(LTnone),
+    columns(0),
+    lines(0)
+{
+    parseColumnSpec(columnSpec);
+}
+
+JKQTMathTextMatrixNode::~JKQTMathTextMatrixNode() {
+    for (int i=0; i<children.size(); i++) {
+        for (int j=0; j<children[i].size(); j++) {
+            delete children[i].at(j);
+        }
+    }
+    children.clear();
+}
+
+void JKQTMathTextMatrixNode::setChildren(const QVector<QVector<JKQTMathTextNode *> > &children)
 {
    this->lines=children.size();
    this->columns=0;
@ -54,13 +87,14 @@ JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText* _parent, QVector<QV
    }
 }

-JKQTMathTextMatrixNode::~JKQTMathTextMatrixNode() {
-    for (int i=0; i<children.size(); i++) {
-        for (int j=0; j<children[i].size(); j++) {
-            delete children[i].at(j);
-        }
-    }
-    children.clear();
+void JKQTMathTextMatrixNode::setRowBottomLine(int col, LineType line)
+{
+    horizontalLineBottomRow[col]=line;
+}
+
+void JKQTMathTextMatrixNode::setTopLine(LineType line)
+{
+    horizontalLineTop=line;
 }

 QString JKQTMathTextMatrixNode::getTypeName() const
@ -68,108 +102,6 @@ QString JKQTMathTextMatrixNode::getTypeName() const
    return "MTmatrixNode";
 }

-void JKQTMathTextMatrixNode::getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* /*prevNodeSize*/) {
-    QFontMetricsF fm(currentEv.getFont(parentMathText), painter.device());
-    JKQTMathTextEnvironment ev1=currentEv;
-
-    double xh=fm.strikeOutPos();//fm.xHeight();
-    //double Ah=fm.ascent();
-    double xw=fm.boundingRect("x").width();
-
-    //ev1.fontSize=ev1.fontSize*parent->getFracFactor();
-
-
-    QVector<double> colwidth, rowheight;
-    //QVector<QVector<double> > widths, heights, baselines;
-
-    double width1=0, baselineHeight1=0, overallHeight1=0, strikeoutPos1=0;
-    //widths.resize(lines);
-    colwidth.resize(columns); for (int i=0; i<columns; i++) colwidth[i]=0;
-    rowheight.resize(lines);
-    //heights=baselines=widths;
-    for (int i=0; i<lines; i++) {
-        rowheight[i]=0;
-        //widths[i].resize(columns);
-        //baselines[i]=heights[i]=widths[i];
-        for (int j=0; j<children[i].size(); j++) {
-            children[i].at(j)->getSize(painter, ev1, width1, baselineHeight1, overallHeight1, strikeoutPos1);
-            /*widths[i].operator[](j)=width1;
-            baselines[i].operator[](j)=baselineHeight;
-            heights[i].operator[](j)=overallHeight1;*/
-            if (overallHeight1>rowheight[i]) rowheight[i]=overallHeight1;
-            if (width1>colwidth[j]) colwidth[j]=width1;
-        }
-    }
-
-
-    overallHeight=(lines-1)*xw/2.0;
-    width=columns*xw;
-    for (int i=0; i<columns; i++) width=width+colwidth[i];
-    for (int i=0; i<lines; i++) overallHeight=overallHeight+rowheight[i];
-    baselineHeight=overallHeight/2.0+xh;
-    strikeoutPos=xh;
-}
-
-double JKQTMathTextMatrixNode::draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* /*prevNodeSize*/) {
-    doDrawBoxes(painter, x, y, currentEv);
-
-    QFontMetricsF fm(currentEv.getFont(parentMathText), painter.device());
-    JKQTMathTextEnvironment ev1=currentEv;
-
-    double xh=fm.strikeOutPos();//fm.xHeight();
-    //double Ah=fm.ascent();
-    double xw=fm.boundingRect("x").width();
-
-    //ev1.fontSize=ev1.fontSize;*parent->getFracFactor();
-
-
-    QVector<double> colwidth, rowheight, rowascent;
-    //QVector<QVector<double> > widths, heights, baselines;
-
-    double width1=0, baselineHeight1=0, overallHeight1=0, strikeoutPos=0;
-    //widths.resize(lines);
-    colwidth.resize(columns); for (int i=0; i<columns; i++) colwidth[i]=0;
-    rowheight.resize(lines);
-    rowascent.resize(lines);
-    //heights=baselines=widths;
-    for (int i=0; i<lines; i++) {
-        rowheight[i]=0;
-        rowascent[i]=0;
-        //widths[i].resize(columns);
-        //baselines[i]=heights[i]=widths[i];
-        for (int j=0; j<children[i].size(); j++) {
-            if (children[i].at(j)!=nullptr) children[i].at(j)->getSize(painter, ev1, width1, baselineHeight1, overallHeight1, strikeoutPos);
-            /*widths[i].operator[](j)=width1;
-            baselines[i].operator[](j)=baselineHeight;
-            heights[i].operator[](j)=overallHeight1;*/
-            if (overallHeight1>rowheight[i]) rowheight[i]=overallHeight1;
-            if (baselineHeight1>rowascent[i]) rowascent[i]=baselineHeight1;
-            if (width1>colwidth[j]) colwidth[j]=width1;
-        }
-    }
-
-    double overallHeight=(lines-1)*xw/2.0;
-    double width=(columns)*xw;
-    for (int i=0; i<columns; i++) width=width+colwidth[i];
-    for (int i=0; i<lines; i++) overallHeight=overallHeight+rowheight[i];
-    double baselineHeight=overallHeight/2.0+xh;
-
-    double xx=x;
-    double yy=y-baselineHeight;
-    if (lines>0) yy=yy+rowascent[0];
-    for (int i=0; i<lines; i++) {
-        xx=x;
-        for (int j=0; j<children[i].size(); j++) {
-            children[i].at(j)->draw(painter, xx, yy, ev1);
-            xx=xx+colwidth[j]+xw;
-        }
-
-        if (i<lines-1) yy=yy+(rowheight[i]-rowascent[i])+xw/2.0+rowascent[i+1];
-    }
-
-
-    return x+width;
-}

 bool JKQTMathTextMatrixNode::toHtml(QString &/*html*/, JKQTMathTextEnvironment /*currentEv*/, JKQTMathTextEnvironment /*defaultEv*/)
 {
@ -188,6 +120,7 @@ int JKQTMathTextMatrixNode::getLines() const {
    return this->lines;
 }

+
 void JKQTMathTextMatrixNode::setDrawBoxes(bool draw)
 {
    this->drawBoxes=draw;
@ -199,5 +132,204 @@ void JKQTMathTextMatrixNode::setDrawBoxes(bool draw)

 }

+void JKQTMathTextMatrixNode::drawVLine(QPainter &painter, double x, double y, double height, LineType lt, double linewidth, double linewidthHeavy, QColor color, double doublelineseparation)
+{
+    if (lt==LTnone) return;
+    QPen p(color, linewidth, Qt::SolidLine);
+    if (lt==LTdashed || lt==LTdoubleDashed) p.setStyle(Qt::DashLine);
+    if (lt==LTheavyline) p.setWidth(linewidthHeavy);
+    painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
+    painter.setPen(p);
+    if (lt==LTline || lt==LTdashed || lt==LTheavyline) {
+        painter.drawLine(QPointF(x,y), QPointF(x,y+height));
+    } else if (lt==LTdoubleline || lt==LTdoubleDashed) {
+        painter.drawLine(QPointF(x-doublelineseparation/2.0,y), QPointF(x-doublelineseparation/2.0,y+height));
+        painter.drawLine(QPointF(x+doublelineseparation/2.0,y), QPointF(x+doublelineseparation/2.0,y+height));
+    }
+}
+
+void JKQTMathTextMatrixNode::drawHLine(QPainter &painter, double x, double y, double width, LineType lt, double linewidth, double linewidthHeavy, QColor color, double doublelineseparation)
+{
+    if (lt==LTnone) return;
+    QPen p(color, linewidth, Qt::SolidLine);
+    if (lt==LTdashed || lt==LTdoubleDashed) p.setStyle(Qt::DashLine);
+    if (lt==LTheavyline) p.setWidth(linewidthHeavy);
+    painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
+    painter.setPen(p);
+    if (lt==LTline || lt==LTdashed || lt==LTheavyline) {
+        painter.drawLine(QPointF(x,y), QPointF(x+width,y));
+    } else if (lt==LTdoubleline || lt==LTdoubleDashed) {
+        painter.drawLine(QPointF(x,y-doublelineseparation/2.0), QPointF(x+width,y-doublelineseparation/2.0));
+        painter.drawLine(QPointF(x,y+doublelineseparation/2.0), QPointF(x+width,y+doublelineseparation/2.0));
+    }
+}
+
+void JKQTMathTextMatrixNode::parseColumnSpec(const QString &columnSpec)
+{
+    int i=0;
+    while (i<columnSpec.size()) {
+        if (columnSpec[i]=='l') {
+            columnAlignment<<MTHALeft;
+        } else if (columnSpec[i]=='c') {
+            columnAlignment<<MTHACentered;
+        } else if (columnSpec[i]=='r') {
+            columnAlignment<<MTHARight;
+        } else if (columnSpec.mid(i,2)=="||") {
+            if (columnAlignment.size()==0) {
+                verticalLineLeft=LTdoubleline;
+            } else {
+                verticalLineRHSColumn[columnAlignment.size()-1]=LTdoubleline;
+            }
+            i++;
+        } else if (columnSpec.mid(i,2)=="::") {
+            if (columnAlignment.size()==0) {
+                verticalLineLeft=LTdoubleDashed;
+            } else {
+                verticalLineRHSColumn[columnAlignment.size()-1]=LTdoubleDashed;
+            }
+            i++;
+        } else if (columnSpec.mid(i,1)=="|") {
+            if (columnAlignment.size()==0) {
+                verticalLineLeft=LTline;
+            } else {
+                verticalLineRHSColumn[columnAlignment.size()-1]=LTline;
+            }
+        } else if (columnSpec.mid(i,1)==":") {
+            if (columnAlignment.size()==0) {
+                verticalLineLeft=LTdashed;
+            } else {
+                verticalLineRHSColumn[columnAlignment.size()-1]=LTdashed;
+            }
+        } else if (!columnSpec[i].isSpace()){
+            parentMathText->addToErrorList(QString("array spec has unknown character '%1' (full spec was '%2')").arg(columnSpec[i]).arg(columnSpec));
+        }
+        i++;
+    }
+}


+
+
+JKQTMathTextMatrixNode::LayoutInfo::LayoutInfo():
+    JKQTMathTextNodeSize(), colwidth(), rowheight()
+{
+
+}
+
+JKQTMathTextMatrixNode::LayoutInfo JKQTMathTextMatrixNode::calcLayout(QPainter &painter, const JKQTMathTextEnvironment &currentEv) const
+{
+    LayoutInfo l;
+
+    const QFontMetricsF fm(currentEv.getFont(parentMathText), painter.device());
+    JKQTMathTextEnvironment ev1=currentEv;
+
+    const double xheight=fm.strikeOutPos();
+    const double xwidth=fm.boundingRect("x").width();
+    const double XPadding=parentMathText->getMatrixXPaddingFactor()*xwidth;
+    const double YPadding=parentMathText->getMatrixYPaddingFactor()*xwidth;
+    const double XSeparation=parentMathText->getMatrixXSeparationFactor()*xwidth;
+    const double YSeparation=parentMathText->getMatrixYSeparationFactor()*xwidth;
+
+    l.colwidth.resize(columns); for (int i=0; i<columns; i++) l.colwidth[i]=0;
+    l.rowheight.resize(lines);
+    l.rowascent.resize(lines);
+    l.cellwidth.resize(lines);
+    l.leftPadding=(verticalLineLeft==LTnone)?0:XPadding;
+    l.rightPadding=(verticalLineRHSColumn.value(columns-1,LTnone)==LTnone)?0:XPadding;
+    l.topPadding=(horizontalLineTop==LTnone)?0:YPadding;
+    l.bottomPadding=(horizontalLineBottomRow.value(lines-1,LTnone)==LTnone)?0:YPadding;
+    for (int ll=0; ll<lines; ll++) l.cellwidth[ll]=QVector<double>(columns, 0.0);
+    QVector<double> rowdescent;
+    rowdescent.resize(lines);
+    for (int i=0; i<lines; i++) {
+        l.rowheight[i]=0;
+        l.rowascent[i]=0;
+        rowdescent[i]=0;
+        for (int j=0; j<children[i].size(); j++) {
+            const JKQTMathTextNodeSize cs=children[i].at(j)->getSize(painter, ev1);
+            l.cellwidth[i].operator[](j)=cs.width;
+            l.colwidth[j]=qMax(l.colwidth[j], cs.width);
+            l.rowascent[i]=qMax(l.rowascent[i], cs.baselineHeight);
+            rowdescent[i]=qMax(rowdescent[i], cs.getDescent());
+        }
+        l.rowheight[i]=l.rowascent[i]+rowdescent[i];
+    }
+
+
+    l.overallHeight=(lines-1)*YSeparation+l.topPadding+l.bottomPadding;
+    l.width=(columns-1)*XSeparation+l.leftPadding+l.rightPadding;
+    for (int i=0; i<columns; i++) l.width=l.width+l.colwidth[i];
+    for (int i=0; i<lines; i++) l.overallHeight=l.overallHeight+l.rowheight[i];
+    l.baselineHeight=l.overallHeight/2.0+xheight;
+    l.strikeoutPos=xheight;
+
+    return l;
+}
+
+void JKQTMathTextMatrixNode::getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* /*prevNodeSize*/) {
+    const  LayoutInfo l=calcLayout(painter, currentEv);
+    width=l.width;
+    overallHeight=l.overallHeight;
+    baselineHeight=l.baselineHeight;
+    strikeoutPos=l.strikeoutPos;
+}
+
+double JKQTMathTextMatrixNode::draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* /*prevNodeSize*/) {
+    doDrawBoxes(painter, x, y, currentEv);
+
+    const QFontMetricsF fm(currentEv.getFont(parentMathText), painter.device());
+    JKQTMathTextEnvironment ev1=currentEv;
+
+    const  LayoutInfo l=calcLayout(painter, currentEv);
+
+    const double xheight=fm.strikeOutPos();
+    const double xwidth=fm.boundingRect("x").width();
+    //const double XPadding=parentMathText->getMatrixXPaddingFactor()*xwidth;
+    //const double YPadding=parentMathText->getMatrixYPaddingFactor()*xwidth;
+    const double XSeparation=parentMathText->getMatrixXSeparationFactor()*xwidth;
+    const double YSeparation=parentMathText->getMatrixYSeparationFactor()*xwidth;
+    const double yTop=y-l.baselineHeight+l.topPadding;
+    const double xLeft=x+l.leftPadding;
+    const double linewidth=parentMathText->getMatrixLinewidthThinFactor()*fm.lineWidth();
+    const double linewidthThick=parentMathText->getMatrixLinewidthHeavyFactor()*fm.lineWidth();
+    const double lineSeparation=parentMathText->getMatrixLineSeparationFactor()*fm.lineWidth();
+    double leftlineX=xLeft-l.leftPadding/2.0;
+    double rightlineX=x+l.width-l.rightPadding/2.0;
+    double toplineY=yTop-l.topPadding/2.0;
+    double bottomlineY=y+l.getDescent()-l.bottomPadding/2;
+    if (verticalLineLeft==LTdoubleline || verticalLineLeft==LTdoubleDashed) leftlineX-=linewidth;
+    if (horizontalLineTop==LTdoubleline || horizontalLineTop==LTdoubleDashed) toplineY-=linewidth;
+    if (verticalLineRHSColumn.value(lines-1, LTnone)==LTdoubleline || verticalLineRHSColumn.value(lines-1, LTnone)==LTdoubleDashed) rightlineX+=linewidth;
+    if (horizontalLineBottomRow.value(columns-1, LTnone)==LTdoubleline || horizontalLineBottomRow.value(columns-1, LTnone)==LTdoubleDashed) bottomlineY+=linewidth;
+
+
+
+    double xx;
+    double yy=yTop;
+    if (lines>0) yy=yy+l.rowascent[0];
+    for (int i=0; i<lines; i++) {
+        xx=xLeft;
+        for (int j=0; j<children[i].size(); j++) {
+            const double cw=l.getCellwidth(i, j);
+            double xoffset=0;
+            if (columnAlignment.value(j, MTHALeft)==MTHACentered) xoffset=(l.colwidth[j]-cw)/2.0;
+            else if (columnAlignment.value(j, MTHALeft)==MTHARight) xoffset=(l.colwidth[j]-cw);
+            children[i].at(j)->draw(painter, xx+xoffset, yy, ev1);
+            xx=xx+l.colwidth[j]+XSeparation;
+            if (i==0 && j<columns-1) drawVLine(painter, xx-XSeparation/2.0, toplineY, bottomlineY-toplineY, verticalLineRHSColumn.value(j, LTnone), linewidth, linewidthThick, currentEv.color, lineSeparation);
+        }
+
+        if (i<lines-1) {
+            double yline=yy+(l.rowheight[i]-l.rowascent[i])+YSeparation/2.0;
+            yy=yline+YSeparation/2.0+l.rowascent[i+1];
+            drawHLine(painter, leftlineX, yline, rightlineX-leftlineX, horizontalLineBottomRow.value(i, LTnone), linewidth, linewidthThick, currentEv.color, lineSeparation);
+        }
+    }
+
+    drawVLine(painter, leftlineX, toplineY, bottomlineY-toplineY, verticalLineLeft, linewidth, linewidthThick, currentEv.color, lineSeparation);
+    drawVLine(painter, rightlineX, toplineY, bottomlineY-toplineY, verticalLineRHSColumn.value(columns-1, LTnone), linewidth, linewidthThick, currentEv.color, lineSeparation);
+    drawHLine(painter, leftlineX, toplineY, rightlineX-leftlineX, verticalLineLeft, linewidth, linewidthThick, currentEv.color, lineSeparation);
+    drawHLine(painter, leftlineX, bottomlineY, rightlineX-leftlineX, horizontalLineBottomRow.value(lines-1, LTnone), linewidth, linewidthThick, currentEv.color, lineSeparation);
+
+    return x+l.width;
+}
--- a/lib/jkqtmathtext/nodes/jkqtmathtextmatrixnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextmatrixnode.h
@ -32,13 +32,39 @@ class JKQTMathText; // forward
 // JKQTMATHTEXT_LIB_EXPORT


-/** \brief subclass representing a \\begin{matrix} node
+/** \brief subclass representing a \c \\begin{matrix} , \c \\begin{tabular} , \c \\begin{array} , ... node
 *  \ingroup jkqtmathtext_items
+ *
+ *  Definition of the matrix geometry
+ *  \image html jkqtmathtext/jkqtmathtext_matrix_geometry.png
+ *
+ *
+ *  Two examples:
+ *  \image html jkqtmathtext/jkqtmathtext_tabular.png
+ *
+ *  \image html jkqtmathtext/jkqtmathtext_array.png
  */
 class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMatrixNode: public JKQTMathTextNode {
    public:
-        JKQTMathTextMatrixNode(JKQTMathText* parent, QVector<QVector<JKQTMathTextNode*> > children);
+        /** \brief types of lines */
+        enum LineType {
+            LTnone, /*!< \brief noline */
+            LTline, /*!< \brief single line */
+            LTdoubleline, /*!< \brief double line */
+            LTheavyline, /*!< \brief heavier/thick line */
+            LTdashed, /*!< \brief single dashed line */
+            LTdoubleDashed, /*!< \brief double dashed line */
+            LTdefault=LTnone
+        };
+        JKQTMathTextMatrixNode(JKQTMathText* parent, const QVector<QVector<JKQTMathTextNode*> >& children, const QString& columnSpec=QString());
+        JKQTMathTextMatrixNode(JKQTMathText* parent, const QString& columnSpec=QString());
        virtual ~JKQTMathTextMatrixNode() override;
+        /** \brief sets the child nodes  */
+        void setChildren(const QVector<QVector<JKQTMathTextNode*> >& children);
+        /** \copydoc horizontalLineBottomRow */
+        void setRowBottomLine(int col, LineType line);
+        /** \copydoc horizontalLineTop */
+        void setTopLine(LineType line);
        /** \copydoc JKQTMathTextNode::getTypeName() */
        virtual QString getTypeName() const override;
        /** \copydoc JKQTMathTextNode::draw() */
@ -52,16 +78,63 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMatrixNode: public JKQTMathTextNode {
        /** \copydoc lines */ 
        int getLines() const;
    protected:
+        /** \brief describes the layout of the whole node */
+        struct LayoutInfo: public JKQTMathTextNodeSize {
+            LayoutInfo();
+            /** \brief widths of the columns */
+            QVector<double> colwidth;
+            /** \brief widths of the cells */
+            QVector<QVector<double> > cellwidth;
+            inline double& getCellwidth(int line, int col) {
+                return cellwidth[line].operator[](col);
+            }
+            inline const double& getCellwidth(int line, int col) const {
+                return cellwidth[line].operator[](col);
+            }
+            /** \brief heights of the rows */
+            QVector<double> rowheight;
+            /** \brief ascents of the rows */
+            QVector<double> rowascent;
+            double leftPadding;
+            double rightPadding;
+            double topPadding;
+            double bottomPadding;
+
+        };
+        /** \brief calclates the layout of the whole block/node
+         *
+         *  \note This function does NOT call transformEnvironment();
+         *        it has to be called before calling this!
+         */
+        LayoutInfo calcLayout(QPainter& painter, const JKQTMathTextEnvironment& currentEv) const;
        /** \copydoc JKQTMathTextNode::getSizeInternal() */
        virtual void getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* prevNodeSize=nullptr) override;
        /** \copydoc JKQTMathTextNode::setDrawBoxes() */
        virtual void setDrawBoxes(bool draw) override;
        /** \brief child nodes making up the matrix, vector of rows */
        QVector<QVector<JKQTMathTextNode*> > children;
+        /** \brief alignment of the columns */
+        QVector<JKQTMathTextHorizontalAlignment> columnAlignment;
+        /** \brief lines to the right of each column */
+        QMap<int,LineType> verticalLineRHSColumn;
+        /** \brief line at the left of the table */
+        LineType verticalLineLeft;
+        /** \brief lines to the bottom of each row */
+        QMap<int,LineType> horizontalLineBottomRow;
+        /** \brief line at the top of the table */
+        LineType horizontalLineTop;
+
        /** \brief number of columns in the matrix */
        int columns;
        /** \brief number of rows in the matrix */
        int lines;
+
+        /** \brief draw a vertical line starting at pixel position (\a x, \a y ) with length \a height, using linetype \a lt, width \a linewidth and \a color */
+        static void drawVLine(QPainter& painter, double x, double y, double height, LineType lt, double linewidth, double linewidthHeavy, QColor color, double doublelineseparation);
+        /** \brief draw a horizontal line starting at pixel position (\a x, \a y ) with length \a width, using linetype \a lt, width \a linewidth and \a color */
+        static void drawHLine(QPainter& painter, double x, double y, double width, LineType lt, double linewidth, double linewidthHeavy, QColor color, double doublelineseparation);
+        /** \brief parses a column specifier */
+        void parseColumnSpec(const QString& columnspec);
 };

 #endif // JKQTMATHTEXTMATRIXNODE_H
--- a/lib/jkqtmathtext/nodes/jkqtmathtextnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextnode.cpp
@ -285,6 +285,18 @@ void JKQTMathTextDualChildNode::clearChildren(bool deleteChildren)
    if (deleteChildren&&c2) delete c2;
 }

+void JKQTMathTextDualChildNode::deleteChild(int i)
+{
+    if (child1&&i==0) {
+        delete child1;
+        child1=nullptr;
+    }
+    if (child2&&i==1) {
+        delete child2;
+        child2=nullptr;
+    }
+}
+
 JKQTMathTextMultiChildNode::JKQTMathTextMultiChildNode(JKQTMathText *parentMathText):
    JKQTMathTextNode(parentMathText)
 {
--- a/lib/jkqtmathtext/nodes/jkqtmathtextnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextnode.h
@ -232,6 +232,8 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMultiChildNode: public JKQTMathTextNod

        /** \brief clear all children, deleting them if \a deleteChildren==true */
        virtual void clearChildren(bool deleteChildren=true) =0;
+        /** \brief delete the i-th child */
+        virtual void deleteChild(int i) =0;

        /** \copydoc JKQTMathTextNode::setDrawBoxes() */
        virtual void setDrawBoxes(bool draw) override;
@ -266,6 +268,9 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextDualChildNode: public JKQTMathTextMult
        virtual int childCount() const override;
        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
        virtual void clearChildren(bool deleteChildren=true) override;
+        /** \copydoc JKQTMathTextMultiChildNode::deleteChild() */
+        virtual void deleteChild(int i) override;
+

    protected:
        /** \brief first child node of this node */
--- a/lib/jkqtmathtext/nodes/jkqtmathtextnodetools.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextnodetools.cpp
@ -21,6 +21,8 @@

 #include "jkqtmathtext/nodes/jkqtmathtextnodetools.h"
 #include "jkqtmathtext/nodes/jkqtmathtextlistnode.h"
+#include "jkqtmathtext/nodes/jkqtmathtextwhitespacenode.h"
+#include "jkqtmathtext/nodes/jkqtmathtexttextnode.h"
 #include "jkqtmathtext/jkqtmathtexttools.h"
 #include "jkqtmathtext/jkqtmathtext.h"
 #include <QDebug>
@ -65,3 +67,42 @@ JKQTMathTextNode *simplifyJKQTMathTextNode(JKQTMathTextNode *node)
    }
    return node;
 }
+
+JKQTMathTextNode *simplifyAndTrimJKQTMathTextNode(JKQTMathTextNode *node)
+{
+    auto cleanText=[](JKQTMathTextNode* t) {
+        JKQTMathTextMultiChildNode* nmc=dynamic_cast<JKQTMathTextMultiChildNode*>(t);
+        JKQTMathTextNode* tt0=(nmc&&nmc->childCount()>0)?nmc->getFirstChild():t;
+        JKQTMathTextNode* tt1=(nmc&&nmc->childCount()>0)?nmc->getLastChild():t;
+        JKQTMathTextTextNode* txt0=dynamic_cast<JKQTMathTextTextNode*>(tt0);
+        if (txt0) {
+            txt0->removeLeadingWhitespace();
+        }
+        JKQTMathTextTextNode* txt1=dynamic_cast<JKQTMathTextTextNode*>(tt1);
+        if (txt1) {
+            txt1->removeTrailingWhitespace();
+        }
+    };
+    JKQTMathTextNode* t=node;
+    for (int iter=0; iter<3; iter++) {
+        t=simplifyJKQTMathTextNode(t);
+        JKQTMathTextMultiChildNode* nmc=dynamic_cast<JKQTMathTextMultiChildNode*>(t);
+        if (nmc && nmc->childCount()>0) {
+            bool done=false;
+            cleanText(nmc);
+            while (!done && nmc->childCount()>0) {
+                JKQTMathTextWhitespaceNode* ws0=dynamic_cast<JKQTMathTextWhitespaceNode*>(nmc->getFirstChild());
+                JKQTMathTextWhitespaceNode* ws1=dynamic_cast<JKQTMathTextWhitespaceNode*>(nmc->getLastChild());
+                if (ws0 && ws0->getWhitespaceType()==JKQTMathTextWhitespaceNode::WSTNormal) {
+                    nmc->deleteChild(0);
+                } else if (ws1 && ws1->getWhitespaceType()==JKQTMathTextWhitespaceNode::WSTNormal) {
+                    nmc->deleteChild(nmc->childCount()-1);
+                } else {
+                    done=true;
+                }
+            }
+        }
+        cleanText(t);
+    }
+    return t;
+}
--- a/lib/jkqtmathtext/nodes/jkqtmathtextnodetools.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextnodetools.h
@ -37,6 +37,13 @@ class JKQTMathTextNode; // forward
 */
 JKQTMATHTEXT_LIB_EXPORT JKQTMathTextNode* simplifyJKQTMathTextNode(JKQTMathTextNode* node);

+/** \brief calls simplifyJKQTMathTextNode(). In addition it tries to clear whitespace at the start and end of the tree
+ *  \ingroup jkqtmathtext_items
+ *
+ *  \see simplifyJKQTMathTextNode()
+ */
+JKQTMATHTEXT_LIB_EXPORT JKQTMathTextNode* simplifyAndTrimJKQTMathTextNode(JKQTMathTextNode* node);
+
 #endif // JKQTMATHTEXTNODETOOLS_H


--- a/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.cpp
@ -227,3 +227,15 @@ void JKQTMathTextSqrtNode::clearChildren(bool deleteChildren)
    }
 }

+void JKQTMathTextSqrtNode::deleteChild(int i)
+{
+    if (child && i==0) {
+        delete child;
+        child=nullptr;
+    }
+    if (childDegree && i==1) {
+        delete childDegree;
+        childDegree=nullptr;
+    }
+}
+
--- a/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.h
@ -70,6 +70,8 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSqrtNode: public JKQTMathTextMultiChil
        virtual int childCount() const override;
        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
        virtual void clearChildren(bool deleteChildren=true) override;
+        /** \copydoc JKQTMathTextMultiChildNode::deleteChild() */
+        virtual void deleteChild(int i) override;

    protected:
        /** \copydoc JKQTMathTextNode::getSizeInternal() */
--- a/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.cpp
@ -376,6 +376,16 @@ JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::MathOperatorText
    return SymbolFullProps(SymbolProps(op, ItalicOff|BoldOff|HeightIsAscent, 1.0, 0.0)).addGlobalFlags(ExtendWidthInMathmode|MakeWhitespaceHalf).addHtml(ophtml, ItalicOff|BoldOff|HeightIsAscent, 1.0, 0.0);
 }

+JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::NarrowMathOperatorText(const QString &op)
+{
+    return NarrowMathOperatorText(op, op);
+}
+
+JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::NarrowMathOperatorText(const QString &op, const QString &ophtml)
+{
+    return SymbolFullProps(SymbolProps(op, ItalicOff|BoldOff|HeightIsAscent, 1.0, 0.0)).addGlobalFlags(SmallExtendWidthInMathmode|MakeWhitespaceHalf).addHtml(ophtml, ItalicOff|BoldOff|HeightIsAscent, 1.0, 0.0);
+}
+
 JKQTMathTextSymbolNode::SymbolFullProps JKQTMathTextSymbolNode::MathOperatorSymbolUnicode(const QString &unicode)
 {
    return SymbolFullProps(MTFEUnicode, SymbolProps(unicode, ItalicOff|BoldOff, 1.0, 0.0)).addGlobalFlags(ExtendWidthInMathmode|MakeWhitespaceHalf);
@ -532,7 +542,7 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
        symbols["brcorner"]=s; symbols["lrcorner"]=s; }
    { auto s=UprightSymbolUnicode(QChar(0x2022)).addUprightHtml("&bull;").addUprightWinSymbol(QChar(0xB7));
        symbols["bullet"]=s; symbols["textbullet"]=s; }
-    symbols["cdots"]=UnicodeSymbol(QChar(0x22EF)).addHtml("&middot;&middot;&middot;").addStd(QString(3, QChar(0xB7)));
+    symbols["cdots"]=UprightSymbolUnicode(QChar(0x22EF)).addHtml("&middot;&middot;&middot;").addStd(QString(3, QChar(0xB7)));
    { auto s=UnicodeSymbol(QChar(0x2103)).addUprightStd("°C").addUprightHtml("&deg;C");
        symbols["celsius"]=s; symbols["degC"]=s; symbols["degreeCelsius"]=s; }
    symbols["ell"]=UprightSymbolUnicode(QChar(0x2113), "&ell;");
@ -583,8 +593,6 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    symbols["infty"]=UnicodeSymbol(QChar(0x221E)).addHtml("&infin;").addWinSymbol(QChar(0xA5)).addStd("8", RotateSymbol90);
    symbols["langle"]=UprightSymbolUnicode(QChar(0x2329)).addWinSymbol(QChar(0xE1));
    symbols["lceil"]=UprightSymbolUnicode(QChar(0x2308)).addHtml("&LeftCeiling;").addWinSymbol(QChar(0xE9));
-    { auto s=SimpleTextSymbol("...").addUnicode(QChar(0x2026)).addWinSymbol(QChar(0xB6));
-        symbols["ldots"]=s; symbols["dots"]=s; }
    symbols["lfloor"]=UprightSymbolUnicode(QChar(0x230A)).addHtml("&LeftFloor;").addWinSymbol(QChar(0xEB));
    symbols["lightning"]=UnicodeSymbol(QChar(0x21AF));
    symbols["male"]=UnicodeSymbol(QChar(0x2642)).addHtml("&male;");
@ -642,46 +650,46 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    /**************************************************************************************
     * STANDARD MathOperator Strings
     **************************************************************************************/
-    symbols["Pr"] = MathOperatorText("Pr");
-    symbols["acos"] = MathOperatorText("acos");
-    symbols["arccos"] = MathOperatorText("arccos");
-    symbols["arcsin"] = MathOperatorText("arcsin");
-    symbols["arctan"] = MathOperatorText("arctan");
-    symbols["arg"] = MathOperatorText("arg").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["argmax"] = MathOperatorText("arg max", "arg&thinsp;max").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["argmin"] = MathOperatorText("arg min", "arg&thinsp;min").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["asin"] = MathOperatorText("asin");
-    symbols["atan"] = MathOperatorText("atan");
-    symbols["cos"] = MathOperatorText("cos");
-    symbols["cosh"] = MathOperatorText("cosh");
-    symbols["cot"] = MathOperatorText("cot");
-    symbols["coth"] = MathOperatorText("coth");
-    symbols["coth"] = MathOperatorText("coth");
-    symbols["deg"] = MathOperatorText("deg");
-    symbols["det"] = MathOperatorText("det");
-    symbols["dim"] = MathOperatorText("dim");
-    symbols["exp"] = MathOperatorText("exp");
-    symbols["gcd"] = MathOperatorText("gcd");
-    symbols["hom"] = MathOperatorText("hom");
-    symbols["ker"] = MathOperatorText("ker");
-    symbols["lb"] = MathOperatorText("lb");
-    symbols["ld"] = MathOperatorText("ld");
-    symbols["lim"] = MathOperatorText("lim").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["liminf"] = MathOperatorText("lim inf", "lim&thinsp;inf").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["limsup"] = MathOperatorText("lim sup", "lim&thinsp;sup").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
-    symbols["ln"] = MathOperatorText("ln");
-    symbols["log"] = MathOperatorText("log");
-    symbols["max"] = MathOperatorText("max");
-    symbols["median"] = MathOperatorText("median");
-    symbols["min"] = MathOperatorText("min");
-    symbols["mod"] = MathOperatorText("mod");
-    symbols["sec"] = MathOperatorText("sec");
-    symbols["sgn"] = MathOperatorText("sgn");
-    symbols["sign"] = MathOperatorText("sign");
-    symbols["sin"] = MathOperatorText("sin");
-    symbols["sinh"] = MathOperatorText("sinh");
-    symbols["tan"] = MathOperatorText("tan");
-    symbols["tanh"] = MathOperatorText("tanh");
+    symbols["Pr"] = NarrowMathOperatorText("Pr");
+    symbols["acos"] = NarrowMathOperatorText("acos");
+    symbols["arccos"] = NarrowMathOperatorText("arccos");
+    symbols["arcsin"] = NarrowMathOperatorText("arcsin");
+    symbols["arctan"] = NarrowMathOperatorText("arctan");
+    symbols["arg"] = NarrowMathOperatorText("arg").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+    symbols["argmax"] = NarrowMathOperatorText("arg max", "arg&thinsp;max").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+    symbols["argmin"] = NarrowMathOperatorText("arg min", "arg&thinsp;min").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+    symbols["asin"] = NarrowMathOperatorText("asin");
+    symbols["atan"] = NarrowMathOperatorText("atan");
+    symbols["cos"] = NarrowMathOperatorText("cos");
+    symbols["cosh"] = NarrowMathOperatorText("cosh");
+    symbols["cot"] = NarrowMathOperatorText("cot");
+    symbols["coth"] = NarrowMathOperatorText("coth");
+    symbols["coth"] = NarrowMathOperatorText("coth");
+    symbols["deg"] = NarrowMathOperatorText("deg");
+    symbols["det"] = NarrowMathOperatorText("det");
+    symbols["dim"] = NarrowMathOperatorText("dim");
+    symbols["exp"] = NarrowMathOperatorText("exp");
+    symbols["gcd"] = NarrowMathOperatorText("gcd");
+    symbols["hom"] = NarrowMathOperatorText("hom");
+    symbols["ker"] = NarrowMathOperatorText("ker");
+    symbols["lb"] = NarrowMathOperatorText("lb");
+    symbols["ld"] = NarrowMathOperatorText("ld");
+    symbols["lim"] = NarrowMathOperatorText("lim").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+    symbols["liminf"] = NarrowMathOperatorText("lim inf", "lim&thinsp;inf").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+    symbols["limsup"] = NarrowMathOperatorText("lim sup", "lim&thinsp;sup").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
+    symbols["ln"] = NarrowMathOperatorText("ln");
+    symbols["log"] = NarrowMathOperatorText("log");
+    symbols["max"] = NarrowMathOperatorText("max");
+    symbols["median"] = NarrowMathOperatorText("median");
+    symbols["min"] = NarrowMathOperatorText("min");
+    symbols["mod"] = NarrowMathOperatorText("mod");
+    symbols["sec"] = NarrowMathOperatorText("sec");
+    symbols["sgn"] = NarrowMathOperatorText("sgn");
+    symbols["sign"] = NarrowMathOperatorText("sign");
+    symbols["sin"] = NarrowMathOperatorText("sin");
+    symbols["sinh"] = NarrowMathOperatorText("sinh");
+    symbols["tan"] = NarrowMathOperatorText("tan");
+    symbols["tanh"] = NarrowMathOperatorText("tanh");

    /**************************************************************************************
     * STANDARD MathOperator Symbols
@ -701,12 +709,12 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    symbols["Updownarrow"]=UprightSymbolUnicode(QChar(0x21D5)).addUprightHtml("&Updownarrow;");
    symbols["approx"]=MathOperatorSymbolUnicode(QChar(0x2248)).addMathOperatorHtml("&asymp;").addMathOperatorWinSymbol(QChar(0xBB));
    symbols["bbC"]=UnicodeSymbol(QChar(0x2102));
-    symbols["bbH"]=MathOperatorSymbolUnicode(QChar(0x210D));
-    symbols["bbN"]=MathOperatorSymbolUnicode(QChar(0x2115));
-    symbols["bbP"]=MathOperatorSymbolUnicode(QChar(0x2119));
-    symbols["bbQ"]=MathOperatorSymbolUnicode(QChar(0x211A));
-    symbols["bbR"]=MathOperatorSymbolUnicode(QChar(0x211D));
-    symbols["bbZ"]=MathOperatorSymbolUnicode(QChar(0x2124));
+    symbols["bbH"]=UnicodeSymbol(QChar(0x210D));
+    symbols["bbN"]=UnicodeSymbol(QChar(0x2115));
+    symbols["bbP"]=UnicodeSymbol(QChar(0x2119));
+    symbols["bbQ"]=UnicodeSymbol(QChar(0x211A));
+    symbols["bbR"]=UnicodeSymbol(QChar(0x211D));
+    symbols["bbZ"]=UnicodeSymbol(QChar(0x2124));
    symbols["because"]=MathOperatorSymbolUnicode(QChar(0x2235)).addMathOperatorHtml("&because;");
    symbols["bigcap"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C2)).addMathOperatorHtml("&Intersection;").addMathOperatorWinSymbol(QChar(0xC7), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
    symbols["bigcup"]=NarrowMathOperatorSymbolUnicode(QChar(0x22C3)).addMathOperatorHtml("&xcup;").addMathOperatorWinSymbol(QChar(0xC8), 1.8).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
@ -727,7 +735,7 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    symbols["coprod"]=NarrowMathOperatorSymbolUnicode(QChar(0x2210)).addMathOperatorHtml("&Coproduct;").addWinSymbol(QChar(0xD5), ItalicOff|BoldOff|FlipSymbolUpDown, 1.8, 0.1).addGlobalFlags(SubSuperscriptBelowAboveSymbol);
    { auto s=MathOperatorSymbolUnicode(QChar(0x222A)).addMathOperatorHtml("&cup;").addMathOperatorWinSymbol(QChar(0xC8));
        symbols["cup"]=s; symbols["lor"]=s; }
-    symbols["ddots"]=MathOperatorSymbolUnicode(QChar(0x22F1)).addMathOperatorHtml("&dtdot;");
+    symbols["ddots"]=UprightSymbolUnicode(QChar(0x22F1)).addMathOperatorHtml("&dtdot;");
    symbols["div"]=MathOperatorSymbolUnicode(QChar(0x00F7)).addMathOperatorHtml("&div;").addMathOperatorWinSymbol(QChar(0xB8));
    symbols["downarrow"]=UprightSymbolUnicode(QChar(0x2193)).addUprightHtml("&ShortDownArrow;").addUprightWinSymbol(QChar(0xAF));
    symbols["downharpoonleft"]=UprightSymbolUnicode(QChar(0x21C3)).addUprightHtml("&LeftDownVector;");
@ -735,13 +743,13 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    { auto s=MathOperatorSymbolUnicode(QChar(0x2205)).addMathOperatorHtml("&varnothing;").addMathOperatorWinSymbol(QChar(0xC6)).addStd("0", BoldOff|ItalicOff|DrawSlash);
        symbols["emptyset"]=s; symbols["varnothing"]=s; }
    symbols["equiv"]=MathOperatorSymbolUnicode(QChar(0x2261)).addMathOperatorHtml("&equiv;").addMathOperatorWinSymbol(QChar(0xBA));
-    symbols["exists"]=MathOperatorSymbolUnicode(QChar(0x2203)).addMathOperatorHtml("&exist;").addMathOperatorWinSymbol(QChar(0x24)).addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight);
-    symbols["forall"]=MathOperatorSymbolUnicode(QChar(0x2200)).addMathOperatorHtml("&forall;").addMathOperatorWinSymbol(QChar(0x22)).addStd("A", ItalicOff|BoldOff|FlipSymbolUpDown);
+    symbols["exists"]=NarrowMathOperatorSymbolUnicode(QChar(0x2203)).addMathOperatorHtml("&exist;").addMathOperatorWinSymbol(QChar(0x24)).addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight);
+    symbols["forall"]=NarrowMathOperatorSymbolUnicode(QChar(0x2200)).addMathOperatorHtml("&forall;").addMathOperatorWinSymbol(QChar(0x22)).addStd("A", ItalicOff|BoldOff|FlipSymbolUpDown);
    { auto s=MathOperatorSymbolUnicode(QChar(0x2265)).addMathOperatorHtml("&GreaterEqual;").addMathOperatorWinSymbol(QChar(0xB3));
        symbols["geq"]=s; symbols["ge"]=s; }
    symbols["geqq"]=MathOperatorSymbolUnicode(QChar(0x2267)).addMathOperatorHtml("&GreaterFullEqual;");
    symbols["gg"]=MathOperatorSymbolUnicode(QChar(0x226B)).addMathOperatorHtml("&NestedGreaterGreater;").addMathOperatorStd(">>");
-    symbols["iddots"]=MathOperatorSymbolUnicode(QChar(0x22F0)).addMathOperatorHtml("&utdot;");
+    symbols["iddots"]=UprightSymbolUnicode(QChar(0x22F0)).addMathOperatorHtml("&utdot;");
    { auto s=UprightSymbolUnicode(QChar(0x21D4)).addUprightHtml("&DoubleLeftRightArrow;").addUprightWinSymbol(QChar(0xDB));
        symbols["iff"]=s; symbols["Leftrightarrow"]=s; }
    symbols["iiint"]=NarrowMathOperatorSymbolUnicode(QChar(0x222D)).addGlobalFlags(IntLikeSymbolCorrection | SubSuperscriptBelowAboveSymbol).addMathOperatorHtml("&tint;").addMathOperatorWinSymbol(QString(3, QChar(0xF2)), 1.8, 0.1);
@ -770,17 +778,17 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    symbols["mid"]=MathOperatorSymbolUnicode(QChar(0x2223)).addMathOperatorHtml("&VerticalBar;").addMathOperatorWinSymbol(QChar(0xBD)).addMathOperatorStd("|");
    symbols["mp"]=MathOperatorSymbolUnicode(QChar(0x2213)).addMathOperatorHtml("&mp;").addWinSymbol(QChar(0xB1),ItalicOff|BoldOff|FlipSymbolUpDown).addStd(QChar(0xB1),ItalicOff|BoldOff|FlipSymbolUpDown);
    symbols["multimap"]=MathOperatorSymbolUnicode(QChar(0x22B8)).addMathOperatorHtml("&mumap;");
-    symbols["nabla"]=MathOperatorSymbolUnicode(QChar(0x2207)).addMathOperatorHtml("&nabla;").addMathOperatorWinSymbol(QChar(0xD1));
-    symbols["ne"]=MathOperatorSymbolUnicode(QChar(0x2260)).addMathOperatorHtml("&ne;").addMathOperatorWinSymbol(QChar(0xB9));
+    symbols["nabla"]=NarrowMathOperatorSymbolUnicode(QChar(0x2207)).addMathOperatorHtml("&nabla;").addMathOperatorWinSymbol(QChar(0xD1));
+    symbols["ne"]=NarrowMathOperatorSymbolUnicode(QChar(0x2260)).addMathOperatorHtml("&ne;").addMathOperatorWinSymbol(QChar(0xB9));
    symbols["nearrow"]=UprightSymbolUnicode(QChar(0x2197)).addUprightHtml("&UpperRightArrow;");
    { auto s=MathOperatorSymbolUnicode(QChar(0x00AC)).addMathOperatorHtml("&not;").addMathOperatorWinSymbol(QChar(0xD8));
        symbols["neg"]=s; symbols["lnot"]=s; }
    symbols["neq"]=MathOperatorSymbolUnicode(QChar(0x2260)).addMathOperatorHtml("&ne;").addMathOperatorWinSymbol(QChar(0xB9)).addStd("=", ItalicOff|BoldOff|DrawSlash);
-    symbols["nexists"]=MathOperatorSymbolUnicode(QChar(0x2204)).addMathOperatorHtml("&NotExists;").addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight|DrawSlash).addMathOperatorWinSymbol(QChar(0x24), ItalicOff|BoldOff|DrawSlash);
-    symbols["ni"]=MathOperatorSymbolUnicode(QChar(0x220B)).addMathOperatorHtml("&ReverseElement;").addMathOperatorWinSymbol(QChar(0xCE), ItalicOff|BoldOff|FlipSymbolLeftRight);
-    symbols["nmid"]=MathOperatorSymbolUnicode(QChar(0x2224)).addMathOperatorHtml("&NotVerticalBar;");
-    symbols["notin"]=MathOperatorSymbolUnicode(QChar(0x2209)).addMathOperatorHtml("&notin;").addMathOperatorWinSymbol(QChar(0xCF));
-    symbols["notni"]=MathOperatorSymbolUnicode(QChar(0x220C)).addMathOperatorHtml("&NotReverseElement;");
+    symbols["nexists"]=NarrowMathOperatorSymbolUnicode(QChar(0x2204)).addMathOperatorHtml("&NotExists;").addStd("E", ItalicOff|BoldOff|FlipSymbolLeftRight|DrawSlash).addMathOperatorWinSymbol(QChar(0x24), ItalicOff|BoldOff|DrawSlash);
+    symbols["ni"]=NarrowMathOperatorSymbolUnicode(QChar(0x220B)).addMathOperatorHtml("&ReverseElement;").addMathOperatorWinSymbol(QChar(0xCE), ItalicOff|BoldOff|FlipSymbolLeftRight);
+    symbols["nmid"]=NarrowMathOperatorSymbolUnicode(QChar(0x2224)).addMathOperatorHtml("&NotVerticalBar;");
+    symbols["notin"]=NarrowMathOperatorSymbolUnicode(QChar(0x2209)).addMathOperatorHtml("&notin;").addMathOperatorWinSymbol(QChar(0xCF));
+    symbols["notni"]=NarrowMathOperatorSymbolUnicode(QChar(0x220C)).addMathOperatorHtml("&NotReverseElement;");
    symbols["nparallel"]=MathOperatorSymbolUnicode(QChar(0x2226)).addMathOperatorHtml("&NotDoubleVerticalBar;");
    symbols["nwarrow"]=UprightSymbolUnicode(QChar(0x2196)).addUprightHtml("&UpperLeftArrow;");
    symbols["odot"]=MathOperatorSymbolUnicode(QChar(0x2299)).addMathOperatorHtml("&odot;");
@ -791,7 +799,7 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    symbols["oplus"]=MathOperatorSymbolUnicode(QChar(0x2295)).addMathOperatorHtml("&CirclePlus;").addMathOperatorWinSymbol(QChar(0xC5));
    symbols["oslash"]=MathOperatorSymbolUnicode(QChar(0x2298)).addMathOperatorHtml("&osol;");
    symbols["otimes"]=MathOperatorSymbolUnicode(QChar(0x2297)).addMathOperatorHtml("&CircleTimes;").addMathOperatorWinSymbol(QChar(0xC4));
-    symbols["parallel"]=MathOperatorSymbolUnicode(QChar(0x2225)).addMathOperatorHtml("&shortparallel;").addMathOperatorStd("||");
+    symbols["parallel"]=NarrowMathOperatorSymbolUnicode(QChar(0x2225)).addMathOperatorHtml("&shortparallel;").addMathOperatorStd("||");
    symbols["pm"] = MathOperatorSymbol(QChar(0xB1), "&plusmn;").addMathOperatorWinSymbol(QChar(0xB1));
    symbols["prec"]=MathOperatorSymbolUnicode(QChar(0x227A)).addMathOperatorHtml("&prec;");
    symbols["prod"]=NarrowMathOperatorSymbolUnicode(QChar(0x220F)).addMathOperatorWinSymbol(QChar(0xD5), 1.8, 0.1).addMathOperatorHtml("&prod;").addGlobalFlags(SubSuperscriptBelowAboveSymbol);
@ -821,13 +829,13 @@ void JKQTMathTextSymbolNode::fillSymbolTables()
    { auto s=UprightSymbolUnicode(QChar(0x2192)).addUprightHtml("&rarr;").addUprightWinSymbol(QChar(0xAE));
      symbols["to"]=s; symbols["rightarrow"]=s; }
    symbols["top"]=MathOperatorSymbolUnicode(QChar(0x22A4)).addMathOperatorHtml("&top;").addMathOperatorWinSymbol(QChar(0x5E));
-    symbols["triangle"]=MathOperatorSymbolUnicode(QChar(0x2206));
+    symbols["triangle"]=NarrowMathOperatorSymbolUnicode(QChar(0x2206));
    symbols["uparrow"]=UprightSymbolUnicode(QChar(0x2191)).addUprightHtml("&ShortUpArrow;").addUprightWinSymbol(QChar(0xAD));
    symbols["updownarrow"]=UprightSymbolUnicode(QChar(0x2195)).addUprightHtml("&updownarrow;");
    symbols["upharpoonleft"]=UprightSymbolUnicode(QChar(0x21BF)).addUprightHtml("&LeftUpVector;");
    symbols["upharpoonright"]=UprightSymbolUnicode(QChar(0x21BE)).addUprightHtml("&RightUpVector;");
-    symbols["vartriangleleft"]=MathOperatorSymbolUnicode(QChar(0x22B2)).addMathOperatorHtml("&LeftTriangle;");
-    symbols["vdots"]=MathOperatorSymbolUnicode(QChar(0x22EE)).addMathOperatorHtml("&vellip;");
+    symbols["vartriangleleft"]=NarrowMathOperatorSymbolUnicode(QChar(0x22B2)).addMathOperatorHtml("&LeftTriangle;");
+    symbols["vdots"]=UprightSymbolUnicode(QChar(0x22EE)).addMathOperatorHtml("&vellip;");
    symbols["vee"]=MathOperatorSymbolUnicode(QChar(0x2228)).addMathOperatorHtml("&vee;").addMathOperatorWinSymbol(QChar(0xDA));
    symbols["vdash"]=MathOperatorSymbolUnicode(QChar(0x22A2)).addMathOperatorHtml("&vdash;");
    symbols["dashv"]=MathOperatorSymbolUnicode(QChar(0x22A3)).addMathOperatorHtml("&dashv;");
--- a/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsymbolnode.h
@ -289,6 +289,10 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSymbolNode: public JKQTMathTextNode {
        static SymbolFullProps NarrowMathOperatorSymbolStd(const QString& symbol);
        /** \brief constructs a SymbolProps for a narrow math-operator symbol like \c \\pm ... in unicode-full-encoding, i.e. ItalicOff, BoldOff, SmallExtendWidthInMathmode */
        static SymbolFullProps NarrowMathOperatorSymbolStd(const QString& symbol, const QString& symbolHTML);
+        /** \brief constructs a SymbolProps for a narrow math-operator like \c \\sin ..., i.e. ItalicOff, BoldOff, HeightIsAscent, ExtendWidthInMathmode */
+        static SymbolFullProps NarrowMathOperatorText(const QString& op);
+        /** \brief constructs a SymbolProps with explicit HTML for a narrow math-operator like \c \\sin ..., i.e. ItalicOff, BoldOff, HeightIsAscent, ExtendWidthInMathmode */
+        static SymbolFullProps NarrowMathOperatorText(const QString& op, const QString& ophtml);


        /** \brief symbols that can be generated in any standard-font */
--- a/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.cpp
@ -337,6 +337,16 @@ QString JKQTMathTextTextNode::getTypeName() const
    return QLatin1String("JKQTMathTextTextNode(")+text+")";
 }

+void JKQTMathTextTextNode::removeTrailingWhitespace()
+{
+    while (text.size()>0 && text[text.size()-1].isSpace()) text=text.left(text.size()-1);
+}
+
+void JKQTMathTextTextNode::removeLeadingWhitespace()
+{
+    while (text.size()>0 && text[0].isSpace()) text=text.right(text.size()-1);
+}
+
 QString JKQTMathTextTextNode::textTransform(const QString &text, const JKQTMathTextEnvironment &currentEv) const
 {
    QString txt=text;
--- a/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtexttextnode.h
@ -68,6 +68,10 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextTextNode: public JKQTMathTextTextBaseN
        virtual double draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSize=nullptr) override;
        /** \copydoc JKQTMathTextNode::getTypeName() */
        virtual QString getTypeName() const override ;
+        /** \brief remove trailing whitespace, is used by simplifyJKQTMathTextNode() */
+        void removeTrailingWhitespace();
+        /** \brief remove leading whitespace, is used by simplifyJKQTMathTextNode()  */
+        void removeLeadingWhitespace();
    protected:
        /** \brief defines how a character shold be drawn, used by splitTextForLayout */
        enum FontMode {