mirror of
https://github.com/jkriege2/JKQtPlotter.git
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6fa5dd65ed
JKQTMathText: JKQTMathTextBraceNode now properly supports different opening and closing braces e.g. |...> for bra-vetors
129 lines
6.8 KiB
C++
129 lines
6.8 KiB
C++
/*
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Copyright (c) 2008-2022 Jan W. Krieger (<jan@jkrieger.de>)
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with contributions from: Razi Alavizadeh
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This software is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License (LGPL) as published by
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the Free Software Foundation, either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License (LGPL) for more details.
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You should have received a copy of the GNU Lesser General Public License (LGPL)
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef JKQTMATHTEXTSUBSUPERSCRIPTNODE_H
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#define JKQTMATHTEXTSUBSUPERSCRIPTNODE_H
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#include "jkqtmathtext/jkqtmathtext_imexport.h"
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#include "jkqtmathtext/jkqtmathtexttools.h"
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#include "jkqtmathtext/nodes/jkqtmathtextnode.h"
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#include <QPainter>
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class JKQTMathText; // forward
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// JKQTMATHTEXT_LIB_EXPORT
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/** \brief subclass representing an subscript node with exactly one argument in the syntax tree
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* \ingroup jkqtmathtext_items
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*
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* \image html jkqtmathtext/jkqtmathtext_subscriptnode_getSizeInternal.png
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*/
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class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSubscriptNode: public JKQTMathTextSingleChildNode {
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public:
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explicit JKQTMathTextSubscriptNode(JKQTMathText* parent, JKQTMathTextNode* child);
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virtual ~JKQTMathTextSubscriptNode() override;
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/** \brief like draw(), i.e. draws the node, but allows to draw the subscript with special placement rules after large blocks (e.g. braces), when \a prevNodeSizeForSpecialPlacement is not \c nullptr
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*
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* \param painter QPainter to use
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* \param x x-position, where the drawing starts [Pixel]
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* \param y Y-position of the baseline, where the drawing starts [Pixel]
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* \param currentEv JKQTMathTextEnvironment object describing the current drawing environment/settings
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* \param[in] prevNodeSizeForSpecialPlacement optional parameter, describing the size of the previous node (on the left). This may be used for layout of some nodes (e.g. sub/super to move correctly next to large parantheses ...)
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*
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* \return the x position which to use for the next part of the text
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*/
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double drawWithSpecialPlacement(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSizeForSpecialPlacement) const;
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/** \copydoc JKQTMathTextNode::draw() */
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virtual double draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv) const override;
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/** \copydoc JKQTMathTextNode::getTypeName() */
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virtual QString getTypeName() const override; /** \brief returns the child node */
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/** \copydoc JKQTMathTextNode::toHtml() */
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virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const override;
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/** \brief like getSize(), i.e. determine the size of the node, but cares for subscript with special placement rules after large blocks (e.g. braces), when \a prevNodeSizeForSpecialPlacement is not \c nullptr
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*
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* \param painter painter to use for determining the size
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* \param currentEv current environment object
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* \param[in] prevNodeSizeForSpecialPlacement optional parameter, describing the size of the previous node (on the left). This may be used for layout of some nodes (e.g. sub/super to move correctly next to large parantheses ...)
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*
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*/
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JKQTMathTextNodeSize getSizeWithSpecialPlacement(QPainter& painter, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSizeForSpecialPlacement) const;
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protected:
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/** \copydoc JKQTMathTextNode::getSizeInternal() */
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virtual JKQTMathTextNodeSize getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const override;
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};
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/** \brief subclass representing an superscript node with exactly one argument in the syntax tree
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* \ingroup jkqtmathtext_items
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*
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* \image html jkqtmathtext/jkqtmathtext_subscriptnode_getSizeInternal.png
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*
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* \note a MTlistNode might modify the positioning slightly for special cases (e.g. \c \\int , \c \\sum ... or after braces)
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*/
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class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSuperscriptNode: public JKQTMathTextSingleChildNode {
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public:
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explicit JKQTMathTextSuperscriptNode(JKQTMathText* parent, JKQTMathTextNode* child);
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virtual ~JKQTMathTextSuperscriptNode() override;
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/** \brief like draw(), but allows to draw the superscript with special placement rules after large blocks (e.g. braces), when \a prevNodeSizeForSpecialPlacement is not \c nullptr
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*
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* \param painter QPainter to use
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* \param x x-position, where the drawing starts [Pixel]
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* \param y Y-position of the baseline, where the drawing starts [Pixel]
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* \param currentEv JKQTMathTextEnvironment object describing the current drawing environment/settings
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* \param[in] prevNodeSizeForSpecialPlacement optional parameter, describing the size of the previous node (on the left). This may be used for layout of some nodes (e.g. sub/super to move correctly next to large parantheses ...)
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*
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* \return the x position which to use for the next part of the text
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*/
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double drawWithSpecialPlacement(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSizeForSpecialPlacement) const;
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/** \copydoc JKQTMathTextNode::draw() */
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virtual double draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv) const override;
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/** \copydoc JKQTMathTextNode::getTypeName() */
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virtual QString getTypeName() const override;
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/** \copydoc JKQTMathTextNode::toHtml() */
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virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const override;
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/** \brief like getSize(), i.e. determine the size of the node, but cares for superscript with special placement rules after large blocks (e.g. braces), when \a prevNodeSizeForSpecialPlacement is not \c nullptr
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*
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* \param painter painter to use for determining the size
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* \param currentEv current environment object
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* \param[in] prevNodeSizeForSpecialPlacement optional parameter, describing the size of the previous node (on the left). This may be used for layout of some nodes (e.g. sub/super to move correctly next to large parantheses ...)
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*
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*/
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JKQTMathTextNodeSize getSizeWithSpecialPlacement(QPainter& painter, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSizeForSpecialPlacement) const;
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protected:
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/** \copydoc JKQTMathTextNode::getSizeInternal() */
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virtual JKQTMathTextNodeSize getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const override;
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};
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#endif // JKQTMATHTEXTSUBSUPERSCRIPTNODE_H
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