JKQTMathText:

- new options interface for JKQTMathText::parse()
  - breaking: removed JKQTMathtext::unparsedNode
  - several minor improvements

doc/dox/whatsnew.dox

@@ -48,10 +48,12 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>IMPROVED: rendering of sqrt</li>
     <li>IMPROVED: rendering and size calculation of decorations</li>
     <li>IMPROVED: tokenizing and parsing of text in text-mode: now a lot of accents with commands like \c \\\"a, \c \\'e and variants (e.g. \c {\\\"a}, \c \\\"{a}, ...) are supported now</li>
-    <li>IMPROVED/breaking: refactored symbol node JKQTMathTextSymbolNode and changed font-lookup!</li>
-    <li>IMPROVED/NEW/breaking: refactored whitespace-processing node JKQTMathTextWhitespaceNode, now all major LaTeX whitespace commands are supported properly</li>
-    <li>IMPROVED/NEW/breaking: refactored LaTeX parser in JKQTMathText</li>
-    <li>REMOVED/breaking: \c \\v[a-zA-Z] and shorthand for \c \\vec{a-zA-Z} was removed, implementation of \c \\bbR,\c \\bbC,... changed</li>
+    <li>IMPROVED/BREAKING: refactored symbol node JKQTMathTextSymbolNode and changed font-lookup!</li>
+    <li>IMPROVED/NEW/BREAKING: refactored whitespace-processing node JKQTMathTextWhitespaceNode, now all major LaTeX whitespace commands are supported properly</li>
+    <li>IMPROVED/NEW/BREAKING: refactored LaTeX parser in JKQTMathText</li>
+    <li>REMOVED/BREAKING: \c \\v[a-zA-Z] and shorthand for \c \\vec{a-zA-Z} was removed, implementation of \c \\bbR,\c \\bbC,... changed</li>
+    <li>MODIFIED/BREAKING: new options interface for JKQTMathText::parse()</li>
+    <li>EMOVED/BREAKING: removed JKQTMathtext::unparsedNode</li>
     <li>IMPROVED/REWORKED rendering of text in text- and math-mode. Now it is more consistent with the output of LaTeX itself</li>
     <li>IMPROVED/REWORKED rendering of blackboard font: now several different rendering modes can be selected using JKQTMathText::setFontBlackboradMode()</li>
     <li>BREAKING/REWORKED: The \\verb!...!-command now works the same as in LaTeX</li>
@@ -123,25 +125,25 @@ Changes, compared to  \ref page_whatsnew_V2019_11 "v2019.11" include:
   <li> fixed issue <a href="https://github.com/jkriege2/JKQtPlotter/issues/52">#52: 'runtime_error': is not a member of 'std'</a>, thanks to <a href="https://github.com/gomgomi">user:gomgomi</a></li>
   <li> fixed issue <a href="https://github.com/jkriege2/JKQtPlotter/issues/56">#56: Logscale zoom multiple zeros? </a>, thanks to <a href="https://github.com/sufuk">user:sufuk</a></li>
   <li> merged PR <a href="https://github.com/jkriege2/JKQtPlotter/pull/51">#51: Bug: JKMathParser exception return local variable </a>, thanks to <a href="https://github.com/StephanOostveen">user:StephanOostveen</a></li>
-  <li>renamed/breaking change: renamed JKQTPPlotObject->JKQTPGeometricPlotElement and added new base class JKQTPPlotAnnotationElement</li>
-  <li>renamed/breaking change: renamed JKQTPColorPaletteStyleAndToolsMixin::setPalette() -> JKQTPColorPaletteStyleAndToolsMixin::setColorPalette()</li>
-  <li>removed/breaking change: removed the usage of some deprecated functions and objects (e.g. QMatrix)</li>
-  <li>removed/breaking change: removed the overlay elements (derived from JKQTPOverlayElement), which were not very well set up and are more confusing than useful.</li>
-  <li>improved/breaking change: geometric objects now use an adaptive drawing algorithm to represent curves (before e.g. ellipses were always separated into a fixed number of line-segments)</li>
-  <li>improved/breaking change: geometric elements constructor: removed all styling properties, added setStyle()-functions to replace them. This is necessary to better work with the extended Styling system</li>
+  <li>renamed/BREAKING change: renamed JKQTPPlotObject->JKQTPGeometricPlotElement and added new base class JKQTPPlotAnnotationElement</li>
+  <li>renamed/BREAKING change: renamed JKQTPColorPaletteStyleAndToolsMixin::setPalette() -> JKQTPColorPaletteStyleAndToolsMixin::setColorPalette()</li>
+  <li>removed/BREAKING change: removed the usage of some deprecated functions and objects (e.g. QMatrix)</li>
+  <li>removed/BREAKING change: removed the overlay elements (derived from JKQTPOverlayElement), which were not very well set up and are more confusing than useful.</li>
+  <li>improved/BREAKING change: geometric objects now use an adaptive drawing algorithm to represent curves (before e.g. ellipses were always separated into a fixed number of line-segments)</li>
+  <li>improved/BREAKING change: geometric elements constructor: removed all styling properties, added setStyle()-functions to replace them. This is necessary to better work with the extended Styling system</li>
   <li>improved: constructors and access functions for several geometric objects (e.g. more constructors, additional functions to retrieve parameters in diferent forms, iterators for polygons, ...)</li>
-  <li>improved/breaking change: reworked class hierarchy of parsed function plots and declared several setters as slots.</li>
-  <li>improved/breaking change: reworked class hierarchy of bar & impulse charts.</li>
-  <li>improved/breaking change: reworked class hierarchy of range charts.</li>
-  <li>improved/breaking change: reworked class hierarchy of special line (step) graphs.</li>
-  <li>improved/breaking change: reworked class hierarchy of filled line graphs.</li>
-  <li>improved/breaking change: reworked class hierarchy of range plot elements (JKQTPVerticalRange and JKQTPHorizontalRange).</li>
-  <li>improved/breaking change: reworked class hierarchy of boxplots.</li>
-  <li>improved/breaking change: reworked class hierarchy of violin plots.</li>
-  <li>improved/breaking change: extended styling system for graphs.</li>
-  <li>improved/breaking change: reworked graph Base-Classes (promoted several setters to slots, added Q_PROPERTY- and Q_ENUM-declarations...)</li>
-  <li>improved/breaking change: made more functions and function parameters const</li>
-  <li>improved/breaking change: image plots now manage CONST-data, not plain pointer arrays... This is OK, since the raw data is never owned nor modified by the plot, only referenced!.</li>
+  <li>improved/BREAKING change: reworked class hierarchy of parsed function plots and declared several setters as slots.</li>
+  <li>improved/BREAKING change: reworked class hierarchy of bar & impulse charts.</li>
+  <li>improved/BREAKING change: reworked class hierarchy of range charts.</li>
+  <li>improved/BREAKING change: reworked class hierarchy of special line (step) graphs.</li>
+  <li>improved/BREAKING change: reworked class hierarchy of filled line graphs.</li>
+  <li>improved/BREAKING change: reworked class hierarchy of range plot elements (JKQTPVerticalRange and JKQTPHorizontalRange).</li>
+  <li>improved/BREAKING change: reworked class hierarchy of boxplots.</li>
+  <li>improved/BREAKING change: reworked class hierarchy of violin plots.</li>
+  <li>improved/BREAKING change: extended styling system for graphs.</li>
+  <li>improved/BREAKING change: reworked graph Base-Classes (promoted several setters to slots, added Q_PROPERTY- and Q_ENUM-declarations...)</li>
+  <li>improved/BREAKING change: made more functions and function parameters const</li>
+  <li>improved/BREAKING change: image plots now manage CONST-data, not plain pointer arrays... This is OK, since the raw data is never owned nor modified by the plot, only referenced!.</li>
   <li>bugfixed/improved: aspect ratio handling in JKQTPlotter.</li>
   <li>new: switching to semantic versioning ... starting with v4.0.0</li>
   <li>new: Compatibility with Qt 5.15 and Qt6</li>

examples/jkqtmathtext_test/testform.cpp

@@ -486,7 +486,7 @@ QTreeWidgetItem *TestForm::createTree(JKQTMathTextNode *node, QTreeWidgetItem* p
         int l=matrixN->getLines();
         int c=matrixN->getColumns();
         name=QString("MatrixNode: l*c=%1*%2").arg(l).arg(c);
-        QVector<QVector<JKQTMathTextNode*> > children=matrixN->getChildren();
+        QVector<QVector<JKQTMathTextNode*> > children=matrixN->getChildrenMatrix();
         for (int y=0; y<l; y++) {
             for (int x=0; x<c; x++) {
                 if (children[y].at(x)!=nullptr) {

lib/jkqtmathtext/jkqtmathtext.cpp

@@ -185,10 +185,8 @@ JKQTMathText::JKQTMathText(QObject* parent):
     //qDebug()<<"set fonts: "<<std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now()-t0).count()/1000.0<<"ms"; t0=std::chrono::high_resolution_clock::now();
     useXITS();
     //qDebug()<<"useXITS: "<<std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now()-t0).count()/1000.0<<"ms"; t0=std::chrono::high_resolution_clock::now();
-    useUnparsed=false;
 
     parsedNode=nullptr;
-    unparsedNode=nullptr;
 
     currentToken=MTTnone;
     currentTokenName="";
@@ -200,8 +198,6 @@ JKQTMathText::JKQTMathText(QObject* parent):
 JKQTMathText::~JKQTMathText() {
     if (parsedNode!=nullptr) delete parsedNode;
     parsedNode=nullptr;
-    if (unparsedNode!=nullptr) delete unparsedNode;
-    unparsedNode=nullptr;
 }
 
 void JKQTMathText::loadSettings(const QSettings& settings, const QString& group){
@@ -1058,16 +1054,6 @@ void JKQTMathText::setMatrixYPaddingFactor(double factor)
     matrix_yPadding_factor=factor;
 }
 
-void JKQTMathText::setUseUnparsed(bool __value)
-{
-    this->useUnparsed = __value;
-}
-
-bool JKQTMathText::isUsingUnparsed() const
-{
-    return this->useUnparsed;
-}
-
 QStringList JKQTMathText::getErrorList() const {
     return this->error_list;
 }
@@ -2288,15 +2274,15 @@ JKQTMathTextNode *JKQTMathText::getParsedNode() const {
 
 
 
-bool JKQTMathText::parse(const QString& text, bool addSpaceBeforeAndAfter, bool allowLinebreaks){
-    QString ntext;
-    if (addSpaceBeforeAndAfter) ntext=QString("\\;")+text+QString("\\;");
-    else ntext=text;
+bool JKQTMathText::parse(const QString& text, ParseOptions options){
+    QString ntext=text;
+    if (options.testFlag(StartWithMathMode)) ntext=QString("$")+ntext+QString("$");
+    if (options.testFlag(AddSpaceBeforeAndAfter)) ntext=QString("\\;")+ntext+QString("\\;");
     if (parsedNode && parseString==ntext) return true;
 
 
     if (parsedNode!=nullptr) delete parsedNode;
-    if (unparsedNode!=nullptr) delete unparsedNode;
+    //std::cout<<"JKQTMathText::parse('"<<ntext.toStdString()<<"', options="<<std::hex<<static_cast<int>(options)<<")\n";
     parseString=ntext;
 
     currentTokenID=-1;
@@ -2306,35 +2292,41 @@ bool JKQTMathText::parse(const QString& text, bool addSpaceBeforeAndAfter, bool
     lastLineCount.clear();
 
     error_list.clear();
-    if (allowLinebreaks) {
+    if (options.testFlag(AllowLinebreaks)) {
         parsedNode=parseMultilineLatexString(true, QString(""), MTHALeft, 1.0, MTSMDefaultSpacing, MTVOFirstLine);
     } else {
         parsedNode=parseLatexString(true);
     }
-    unparsedNode=new JKQTMathTextVerbatimNode(this, text);
+    parsedNode=simplifyJKQTMathTextNode(parsedNode);
     return (parsedNode!=nullptr);
 }
 
 
 QSizeF JKQTMathText::getSize(QPainter& painter){
     if (getNodeTree()!=nullptr) {
-        double w=0, a=0, d=0, s=0;
-        getSizeDetail(painter, w, a, d, s);
-        return QSizeF(w, a+d);
+        const JKQTMathTextNodeSize s=getSizeDetail(painter);
+        return s.getSize();
     }
     return QSizeF(0,0);
 }
 
+QSize JKQTMathText::getIntSize(QPainter &painter)
+{
+    if (getNodeTree()!=nullptr) {
+        const JKQTMathTextNodeSize s=getSizeDetail(painter);
+        return s.getIntSize();
+    }
+    return QSize(0,0);
+}
+
 double JKQTMathText::getDescent(QPainter& painter) {
-    double w=0, a=0, d=0, s=0;
-    getSizeDetail(painter, w, a, d, s);
-    return d;
+    const JKQTMathTextNodeSize s=getSizeDetail(painter);
+    return s.getDescent();
 }
 
 double JKQTMathText::getAscent(QPainter& painter) {
-    double w=0, a=0, d=0, s=0;
-    getSizeDetail(painter, w, a, d, s);
-    return a;
+    const JKQTMathTextNodeSize s=getSizeDetail(painter);
+    return s.baselineHeight;
 }
 
 void JKQTMathText::getSizeDetail(QPainter& painter, double& width, double& ascent, double& descent, double& strikeoutPos) {
@@ -2516,7 +2508,6 @@ QPicture JKQTMathText::drawIntoPicture(bool drawBoxes)
 
 
 JKQTMathTextNode *JKQTMathText::getNodeTree() const {
-    if (useUnparsed) return unparsedNode;
     return parsedNode;
 }
 

lib/jkqtmathtext/jkqtmathtext.h

@@ -25,6 +25,7 @@
 #ifndef JKQTMATHTEXT_H
 #define JKQTMATHTEXT_H
 
+#include <QFlags>
 #include <QObject>
 #include <QSettings>
 #include <QPainter>
@@ -214,16 +215,28 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathText : public QObject {
         void loadSettings(const QSettings& settings, const QString& group=QString("mathtext/"));
         /** \brief store the object settings to the given QSettings object with the given name prefix */
         void saveSettings(QSettings& settings, const QString& group=QString("mathtext/")) const;
+        /** \brief options for parse() */
+        enum ParseOption {
+            AddSpaceBeforeAndAfter = 0x01, /*!< \brief If set, a little bit of space is added before and after the text. */
+            StartWithMathMode = 0x02, /*!< \brief if set, the parser assumes the LaTeX string is in math-mode (as if surrounded by \c $ ) */
+            AllowLinebreaks = 0x04, /*!< \brief If set, linebreak (i.e. \c \\ or \c \\newline )  are allowed, otherwise a single line wihtout such linebreak commands is expected */
+            DefaultParseOptions=AllowLinebreaks,
+        };
+        Q_DECLARE_FLAGS(ParseOptions, ParseOption)
+        Q_FLAG(ParseOptions)
         /** \brief parse the given LaTeX string.
          *
-         *  \param addSpaceBeforeAndAfter If \ctrue a little bit of space is added before and after the text.
-         *  \param allowLinebreaks If \c true , linebreak (i.e. \c \\ or \c \\newline )  are allowed, otherwise a single line wihtout such linebreak commands is expected
+         *  \param options Options for parsing, \see ParseOptions
+         *  \param allowLinebreaks
          *
          *  \returns \c true on success.
          */
-        bool parse(const QString &text, bool addSpaceBeforeAndAfter=false, bool allowLinebreaks=true);
-        /** \brief get the size of the drawn representation. returns an invalid size if no text has been parsed. */
+        bool parse(const QString &text, ParseOptions options=DefaultParseOptions);
+
+        /** \brief get the size of the drawn representation. returns \c QSizeF(0,0) if no text has been parsed. */
         QSizeF getSize(QPainter& painter);
+        /** \brief get the rounded (using ceil) to an integer size of the drawn representation. returns \c QSize(0,0) if no text has been parsed. */
+        QSize getIntSize(QPainter& painter);
         /** \brief return the descent, i.e. the distance from the baseline to the lowest part of the representation */
         double getDescent(QPainter& painter);
         /** \brief return the ascentt, i.e. the distance from the baseline to the highest part of the representation */
@@ -643,11 +656,6 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathText : public QObject {
         void setMatrixYPaddingFactor(double factor);
 
 
-
-        /** \copydoc useUnparsed */ 
-        void setUseUnparsed(bool __value);
-        /** \copydoc useUnparsed */ 
-        bool isUsingUnparsed() const;
         /** \copydoc error_list */
         QStringList getErrorList() const;
         /** \brief returns \c true when errors were registered in the system \see error_list */
@@ -883,10 +891,6 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathText : public QObject {
 
         /** \brief the result of parsing the last string supplied to the object via parse() */
         JKQTMathTextNode* parsedNode;
-        /** \brief a tree containing the unparsed text as a single node */
-        JKQTMathTextNode* unparsedNode;
-        /** \brief if true, the unparsedNode is drawn \see unparsedNode */
-        bool useUnparsed;
 
         /** \brief returns the syntax tree of JKQTMathTextNode's that was created by the last parse call */
         JKQTMathTextNode* getNodeTree() const;

lib/jkqtmathtext/nodes/jkqtmathtextinstructionnode.cpp

@@ -203,6 +203,7 @@ JKQTMathTextSimpleInstructionNode::InstructionProperties::InstructionProperties(
 JKQTMathTextModifiedTextPropsInstructionNode::JKQTMathTextModifiedTextPropsInstructionNode(JKQTMathText* _parent, const QString& name, JKQTMathTextNode* child, const QStringList& parameters):
     JKQTMathTextInstruction1Node(_parent, name, child, parameters)
 {
+    fillInstructions();
 }
 
 JKQTMathTextModifiedTextPropsInstructionNode::~JKQTMathTextModifiedTextPropsInstructionNode() {
@@ -215,6 +216,7 @@ QString JKQTMathTextModifiedTextPropsInstructionNode::getTypeName() const
 }
 
 void JKQTMathTextModifiedTextPropsInstructionNode::getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* /*prevNodeSize*/) {
+    fillInstructions();
     JKQTMathTextEnvironment ev=currentEv;
 
     executeInstruction(ev);
@@ -223,11 +225,12 @@ void JKQTMathTextModifiedTextPropsInstructionNode::getSizeInternal(QPainter& pai
 }
 
 double JKQTMathTextModifiedTextPropsInstructionNode::draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* /*prevNodeSize*/) {
+    fillInstructions();
     doDrawBoxes(painter, x, y, currentEv);
     JKQTMathTextEnvironment ev=currentEv;
 
     executeInstruction(ev);
-
+    //std::cout<<"  MODNODE: "<<getInstructionName().toStdString()<<" ev.mathMode="<<ev.insideMath<<", ev.forceUpright="<<ev.insideMathForceDigitsUpright<<"\n";
     return getChild()->draw(painter, x, y, ev);
 }
 
@@ -266,6 +269,7 @@ void JKQTMathTextModifiedTextPropsInstructionNode::modifyInMathEnvironment(const
 
 void JKQTMathTextModifiedTextPropsInstructionNode::executeInstruction(JKQTMathTextEnvironment &ev) const
 {
+    fillInstructions();
     instructions.value(getInstructionName(), InstructionProperties()).modifier(ev, getParameters());
 }
 
@@ -649,6 +653,7 @@ JKQTMathTextModifiedTextPropsInstructionNode::InstructionProperties::Instruction
 JKQTMathTextBoxInstructionNode::JKQTMathTextBoxInstructionNode(JKQTMathText* _parent, const QString& name, JKQTMathTextNode* child, const QStringList& parameters):
     JKQTMathTextInstruction1Node(_parent, name, child, parameters)
 {
+    fillInstructions();
 }
 
 JKQTMathTextBoxInstructionNode::~JKQTMathTextBoxInstructionNode() {

lib/jkqtmathtext/nodes/jkqtmathtextmatrixnode.cpp

@@ -39,7 +39,7 @@
 
 
 JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText* _parent, const QVector<QVector<JKQTMathTextNode *> > &children, const QString &columnSpec):
-    JKQTMathTextNode(_parent),
+    JKQTMathTextMultiChildNode(_parent),
     verticalLineRHSColumn(),
     verticalLineLeft(LTnone),
     horizontalLineBottomRow(),
@@ -52,7 +52,7 @@ JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText* _parent, const QVec
 }
 
 JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText *_parent, const QString &columnSpec):
-    JKQTMathTextNode(_parent),
+    JKQTMathTextMultiChildNode(_parent),
     verticalLineRHSColumn(),
     verticalLineLeft(LTnone),
     horizontalLineBottomRow(),
@@ -64,12 +64,7 @@ JKQTMathTextMatrixNode::JKQTMathTextMatrixNode(JKQTMathText *_parent, const QStr
 }
 
 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();
+    clearChildrenImpl(true);
 }
 
 void JKQTMathTextMatrixNode::setChildren(const QVector<QVector<JKQTMathTextNode *> > &children)
@@ -108,7 +103,7 @@ bool JKQTMathTextMatrixNode::toHtml(QString &/*html*/, JKQTMathTextEnvironment /
     return false;
 }
 
-QVector<QVector<JKQTMathTextNode *> > JKQTMathTextMatrixNode::getChildren() const {
+QVector<QVector<JKQTMathTextNode *> > JKQTMathTextMatrixNode::getChildrenMatrix() const {
     return this->children;
 }
 
@@ -120,6 +115,106 @@ int JKQTMathTextMatrixNode::getLines() const {
     return this->lines;
 }
 
+QList<JKQTMathTextNode *> JKQTMathTextMatrixNode::getChildren()
+{
+    QList<JKQTMathTextNode *> l;
+    for (int i=0; i<children.size(); i++) {
+        for (int j=0; j<children[i].size(); j++) {
+            l<<children[i].at(j);
+        }
+    }
+    return l;
+}
+
+int JKQTMathTextMatrixNode::childCount() const
+{
+    int s=0;
+    for (int i=0; i<children.size(); i++) {
+        s+=children[i].size();
+    }
+    return s;
+}
+
+void JKQTMathTextMatrixNode::clearChildren(bool deleteChildren)
+{
+    clearChildrenImpl(deleteChildren);
+}
+
+
+void JKQTMathTextMatrixNode::clearChildrenImpl(bool deleteChildren)
+{
+    for (int i=0; i<children.size(); i++) {
+        for (int j=0; j<children[i].size(); j++) {
+            if (deleteChildren) delete children[i].at(j);
+        }
+    }
+    children.clear();
+}
+
+
+
+void JKQTMathTextMatrixNode::deleteChild(int nn)
+{
+    int n=0;
+    for (int i=0; i<children.size(); i++) {
+        for (int j=0; j<children[i].size(); j++) {
+            if (n==nn) {
+                delete children[i].operator[](j);
+                children[i].operator[](j)=new JKQTMathTextNoopNode(parentMathText);
+                children[i].operator[](j)->setParentNode(this);
+                return ;
+            }
+            n++;
+        }
+    }
+    return ;
+}
+
+JKQTMathTextNode *JKQTMathTextMatrixNode::getChild(int nn)
+{
+    int n=0;
+    for (int i=0; i<children.size(); i++) {
+        for (int j=0; j<children[i].size(); j++) {
+            if (n==nn) {
+                return children[i].at(j);
+            }
+            n++;
+        }
+    }
+    return nullptr;
+}
+
+const JKQTMathTextNode *JKQTMathTextMatrixNode::getChild(int nn) const
+{
+    int n=0;
+    for (int i=0; i<children.size(); i++) {
+        for (int j=0; j<children[i].size(); j++) {
+            if (n==nn) {
+                return children[i].at(j);
+            }
+            n++;
+        }
+    }
+    return nullptr;
+}
+
+JKQTMathTextNode *JKQTMathTextMatrixNode::replaceChild(int nn, JKQTMathTextNode *newChild)
+{
+    int n=0;
+    for (int i=0; i<children.size(); i++) {
+        for (int j=0; j<children[i].size(); j++) {
+            if (n==nn) {
+                JKQTMathTextNode* old= children[i].at(j);
+                children[i].operator[](j)=newChild;
+                return old;
+            }
+            n++;
+        }
+    }
+    return nullptr;
+
+}
+
 
 void JKQTMathTextMatrixNode::setDrawBoxes(bool draw)
 {

lib/jkqtmathtext/nodes/jkqtmathtextmatrixnode.h

@@ -44,7 +44,7 @@ class JKQTMathText; // forward
  *
  *  \image html jkqtmathtext/jkqtmathtext_array.png
   */
-class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMatrixNode: public JKQTMathTextNode {
+class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMatrixNode: public JKQTMathTextMultiChildNode {
     public:
         /** \brief types of lines */
         enum LineType {
@@ -72,11 +72,25 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMatrixNode: public JKQTMathTextNode {
         /** \copydoc JKQTMathTextNode::toHtml() */
         virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) override;
         /** \brief returns the child nodes  */
-        QVector<QVector<JKQTMathTextNode*> > getChildren() const;
+        QVector<QVector<JKQTMathTextNode*> > getChildrenMatrix() const;
         /** \copydoc columns */ 
         int getColumns() const;
         /** \copydoc lines */ 
         int getLines() const;
+        /** \copydoc JKQTMathTextMultiChildNode::getChildren() */
+        virtual QList<JKQTMathTextNode*> getChildren() override;
+        /** \copydoc JKQTMathTextMultiChildNode::childCount() */
+        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() */
+        virtual const JKQTMathTextNode* getChild(int i) const override;
+        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
+        virtual JKQTMathTextNode* replaceChild(int i, JKQTMathTextNode* newChild) override;
     protected:
         /** \brief describes the layout of the whole node */
         struct LayoutInfo: public JKQTMathTextNodeSize {
@@ -135,6 +149,8 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMatrixNode: public JKQTMathTextNode {
         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);
+        /** \copydoc JKQTMathTextMultiChildNode::clearChildren() */
+        void clearChildrenImpl(bool deleteChildren);
 };
 
 #endif // JKQTMATHTEXTMATRIXNODE_H

lib/jkqtmathtext/nodes/jkqtmathtextnode.cpp

@@ -380,3 +380,37 @@ JKQTMathTextNodeSize JKQTMathTextNode::getSize(QPainter &painter, JKQTMathTextEn
     getSize(painter, currentEv, s.width, s.baselineHeight, s.overallHeight, s.strikeoutPos, prevNodeSize);
     return s;
 }
+
+JKQTMathTextNoopNode::JKQTMathTextNoopNode(JKQTMathText *parent):
+    JKQTMathTextNode(parent)
+{
+
+}
+
+JKQTMathTextNoopNode::~JKQTMathTextNoopNode()
+{
+
+}
+
+QString JKQTMathTextNoopNode::getTypeName() const
+{
+    return "MTNoopNode";
+}
+
+bool JKQTMathTextNoopNode::toHtml(QString &html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv)
+{
+    return true;
+}
+
+double JKQTMathTextNoopNode::draw(QPainter &painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize *prevNodeSize)
+{
+    return x;
+}
+
+void JKQTMathTextNoopNode::getSizeInternal(QPainter &painter, JKQTMathTextEnvironment currentEv, double &width, double &baselineHeight, double &overallHeight, double &strikeoutPos, const JKQTMathTextNodeSize *prevNodeSize)
+{
+    width=0;
+    baselineHeight=0;
+    overallHeight=0;
+    strikeoutPos=0;
+}

lib/jkqtmathtext/nodes/jkqtmathtextnode.h

@@ -279,4 +279,26 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextDualChildNode: public JKQTMathTextMult
         JKQTMathTextNode* child2;
 };
 
+
+
+
+/** \brief subclass representing a node that outputs nothing
+ *  \ingroup jkqtmathtext_items
+ *
+ */
+class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextNoopNode: public JKQTMathTextNode {
+    public:
+        explicit JKQTMathTextNoopNode(JKQTMathText* parent);
+        virtual ~JKQTMathTextNoopNode() override;
+        /** \copydoc JKQTMathTextNode::getTypeName() */
+        virtual QString getTypeName() const override;
+        /** \copydoc JKQTMathTextNode::toHtml() */
+        virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) override;
+        /** \copydoc JKQTMathTextNode::draw() */
+        virtual double draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSize=nullptr) override;
+    protected:
+        /** \copydoc JKQTMathTextNode::getSizeInternal() */
+        virtual void getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* prevNodeSize=nullptr) override;
+
+};
 #endif // JKQTMATHTEXTNODE_H

lib/jkqtmathtext/nodes/jkqtmathtextnodetools.cpp

@@ -30,26 +30,27 @@
 JKQTMathTextNode *simplifyJKQTMathTextNode(JKQTMathTextNode *node)
 {
     JKQTMathTextHorizontalListNode* nl=dynamic_cast<JKQTMathTextHorizontalListNode*>(node);
+    JKQTMathTextVerticalListNode* vl=dynamic_cast<JKQTMathTextVerticalListNode*>(node);
     JKQTMathTextMultiChildNode* nmc=dynamic_cast<JKQTMathTextMultiChildNode*>(node);
     JKQTMathTextSingleChildNode* nsc=dynamic_cast<JKQTMathTextSingleChildNode*>(node);
-    if (nl) {
-        if (nl->childCount()==1) {
+    if ((nl || vl) && nmc) {
+        if (nmc->childCount()==1) {
             // if there was only a single node: simplify the syntax tree, by removing the outer list node
-            JKQTMathTextNode* ret= simplifyJKQTMathTextNode(nl->getChild(0));
-            nl->clearChildren(false);
+            JKQTMathTextNode* ret= simplifyJKQTMathTextNode(nmc->getChild(0));
+            nmc->clearChildren(false);
             ret->setParentNode(nullptr);
-            delete nl;
+            delete nmc;
             return ret;
-        } else if (nl->childCount()>1) {
+        } else if (nmc->childCount()>1) {
             // if there are several child nodes, apply this method recursively
-            for (int i=0; i<nl->childCount(); i++) {
-                JKQTMathTextNode* c=nl->getChild(i);
+            for (int i=0; i<nmc->childCount(); i++) {
+                JKQTMathTextNode* c=nmc->getChild(i);
                 JKQTMathTextNode* newc= simplifyJKQTMathTextNode(c);
-                if (c!=newc) nl->replaceAndDeleteChild(i, newc);
+                if (c!=newc) nmc->replaceAndDeleteChild(i, newc);
             }
-            return nl;
+            return nmc;
         }
-        return nl;
+        return nmc;
     } else if (nmc) {
         // apply this method recursively to any children
         for (int i=0; i<nmc->childCount(); i++) {
@@ -106,3 +107,32 @@ JKQTMathTextNode *simplifyAndTrimJKQTMathTextNode(JKQTMathTextNode *node)
     }
     return t;
 }
+
+
+namespace JKQTMathText_private {
+    QString JKQTMathTextNodeTree2String(JKQTMathTextNode *root, int level)
+    {
+        QString tree;
+        JKQTMathTextMultiChildNode* nmc=dynamic_cast<JKQTMathTextMultiChildNode*>(root);
+        JKQTMathTextSingleChildNode* nsc=dynamic_cast<JKQTMathTextSingleChildNode*>(root);
+        if (level>=1) {
+            for (int i=0; i<level-1; i++) tree+="|  ";
+        }
+        if (level>0) tree+="+--";
+        tree+=root->getTypeName()+"\n";
+        if (nmc) {
+            for (int i=0; i<nmc->childCount(); i++) {
+                tree+=JKQTMathTextNodeTree2String(nmc->getChild(i), level+1);
+            }
+        } else if (nsc) {
+            tree+=JKQTMathTextNodeTree2String(nsc->getChild(), level+1);
+        }
+
+        return tree;
+    }
+}
+
+QString JKQTMathTextNodeTree2String(JKQTMathTextNode *root)
+{
+    return JKQTMathText_private::JKQTMathTextNodeTree2String(root, 0);
+}

lib/jkqtmathtext/nodes/jkqtmathtextnodetools.h

@@ -44,6 +44,44 @@ JKQTMATHTEXT_LIB_EXPORT JKQTMathTextNode* simplifyJKQTMathTextNode(JKQTMathTextN
  */
 JKQTMATHTEXT_LIB_EXPORT JKQTMathTextNode* simplifyAndTrimJKQTMathTextNode(JKQTMathTextNode* node);
 
+/*! \brief converts a node-tree with the given \a root into a string, representing the node-tree
+   \ingroup jkqtmathtext_items
+
+   \see This method uses JKQTMathText::getTypeName()
+
+   Here is an example output for
+   \code
+     $x_{1/2}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$
+   \endcode
+
+   The output looks like this:
+   \verbatim
+JKQTMathTextModifiedTextPropsInstructionNode(equation)
++--MTHorizontalListNode
+|  +--JKQTMathTextTextNode(x)
+|  +--MTsubscriptNode
+|  |  +--MTHorizontalListNode
+|  |  |  +--JKQTMathTextTextNode(1)
+|  |  |  +--JKQTMathTextTextNode(/)
+|  |  |  +--JKQTMathTextTextNode(2)
+|  +--JKQTMathTextSymbolNode(=)
+|  +--MTfracNode
+|  |  +--MTHorizontalListNode
+|  |  |  +--JKQTMathTextSymbolNode(-)
+|  |  |  +--JKQTMathTextTextNode(b)
+|  |  |  +--JKQTMathTextSymbolNode(pm)
+|  |  |  +--MTsqrtNode
+|  |  |  |  +--MTHorizontalListNode
+|  |  |  |  |  +--JKQTMathTextTextNode(b)
+|  |  |  |  |  +--MTsuperscriptNode
+|  |  |  |  |  |  +--JKQTMathTextTextNode(2)
+|  |  |  |  |  +--JKQTMathTextSymbolNode(-)
+|  |  |  |  |  +--JKQTMathTextTextNode(4ac)
+|  |  +--JKQTMathTextTextNode(2a)
+   \endverbatim
+ */
+JKQTMATHTEXT_LIB_EXPORT QString JKQTMathTextNodeTree2String(JKQTMathTextNode* root);
+
 #endif // JKQTMATHTEXTNODETOOLS_H
 
 

lib/jkqtmathtext/nodes/jkqtmathtexttextnode.cpp

@@ -302,8 +302,9 @@ double JKQTMathTextTextNode::draw(QPainter& painter, double x, double y, JKQTMat
 
     //qDebug()<<"JKQTMathTextTextNode: text="<<text<<" font="<<f;
 
-
+    //std::cout<<"  TEXT: currentEv.mathMode="<<currentEv.insideMath<<", currentEv.forceUpright="<<currentEv.insideMathForceDigitsUpright<<"\n";
     for (int i=0; i<textpart.size(); i++) {
+        //std::cout<<"  TEXT: mode="<<fontMode[i]<<", text='"<<textpart[i].toStdString()<<"'\n";
         switch(fontMode[i]) {
             case FMasDefined:
                 painter.setFont(f);

lib/jkqtplotter/jkqtpbaseplotter.cpp

@@ -1738,7 +1738,6 @@ bool JKQTBasePlotter::printpreviewNew(QPaintDevice* paintDevice, bool setAbsolut
     plotterStyle.widgetBackgroundBrush=bc;
     paintMagnification=oldP;
 
-    mathText.setUseUnparsed(false);
 
     return res;
 
@@ -3744,7 +3743,6 @@ void JKQTBasePlotter::saveImage(const QString& filename, bool displayPreview) {
                 QFile::copy(fn, tempFM);
             }
 
-            mathText.setUseUnparsed(!jkqtpPaintDeviceAdapters[adapterID]->useLatexParser());
 
             gridPrintingCalc();
             QPaintDevice* paintDevice=jkqtpPaintDeviceAdapters[adapterID]->createPaintdevice(fn, jkqtp_roundTo<int>(gridPrintingSize.width()), jkqtp_roundTo<int>(gridPrintingSize.height()));
@@ -5104,11 +5102,6 @@ JKQTBasePlotter::textSizeData::textSizeData():
 
 
 
-bool JKQTPPaintDeviceAdapter::useLatexParser() const
-{
-    return true;
-}
-
 QPaintDevice *JKQTPPaintDeviceAdapter::createPaintdeviceMM(const QString &filename, double widthMM, double heightMM) const
 {
 #if QT_VERSION>=QT_VERSION_CHECK(6,0,0)

lib/jkqtplotter/jkqtpbaseplotter.h

@@ -87,7 +87,6 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPPaintDeviceAdapter {
         virtual double getPrintSizeXInMM() const =0;
         virtual double getPrintSizeYInMM() const =0;
         virtual bool isPrinter() const=0;
-        virtual bool useLatexParser() const;
         /** \brief create a paint device with a given size in pt */
         virtual QPaintDevice* createPaintdevice(const QString& filename, int widthPix, int heightPix) const=0;
         /** \brief create a paint device with a given size in millimeters ... the default implementation call createPaintdevice(), assuming the standard logical resolution of the desktop!!!) */

tools/jkqtmathtext_render/jkqtmathtext_render.cpp

@@ -24,6 +24,7 @@
 #include "jkqtmathtext/jkqtmathtextlabel.h"
 #include "jkqtcommon/jkqtpstringtools.h"
 #include "jkqtmathtext/nodes/jkqtmathtextsymbolnode.h"
+#include "jkqtmathtext/nodes/jkqtmathtextnodetools.h"
 #include <iostream>
 
 void processFont(const QString font, QStringList& fonts, QString& mathFont)
@@ -510,6 +511,8 @@ int main(int argc, char* argv[])
                     <<latex[i].toStdString()<<"\n"
                     <<"-----------------------------------------------------------\n"
                     <<mathText.getErrorList().join("\n").toStdString()<<"\n"
+                   <<"-----------------------------------------------------------\n"
+                   <<"RENDERTREE:\n"<<JKQTMathTextNodeTree2String(mathText.getParsedNode()).toStdString()
                    <<"-----------------------------------------------------------\n"
                     ;
         } else if (verbose) {
@@ -517,6 +520,8 @@ int main(int argc, char* argv[])
                     <<"parsing duration: "<<durParseMS<<"ms\n"
                     <<"-----------------------------------------------------------\n"
                     <<latex[i].toStdString()<<"\n"
+                    <<"-----------------------------------------------------------\n"
+                    <<"RENDERTREE:\n"<<JKQTMathTextNodeTree2String(mathText.getParsedNode()).toStdString()
                     <<"-----------------------------------------------------------\n";
         }