mirror of
https://github.com/jkriege2/JKQtPlotter.git
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117 lines
5.2 KiB
C++
117 lines
5.2 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 JKQTMATHTEXTBRACENODE_H
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#define JKQTMATHTEXTBRACENODE_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 a brace node
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* \ingroup jkqtmathtext_items
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*
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* \image html jkqtmathtext/jkqtmathtext_bracenode_geo.png
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*
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* This node supports the brace-types encoded by JKQTMathTextBraceType:
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* \copydetails JKQTMathTextBraceType
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*
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* In addition it is possible to switch the opening and the closing braces independently on and off.
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*/
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class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextBraceNode: public JKQTMathTextSingleChildNode {
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public:
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JKQTMathTextBraceNode(JKQTMathText* parent, JKQTMathTextBraceType openbrace, JKQTMathTextBraceType closebrace, JKQTMathTextNode* child);
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virtual ~JKQTMathTextBraceNode() override;
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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::toHtml() */
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virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) const override;
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/** \copydoc JKQTMathTextNode::getTypeName() */
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virtual QString getTypeName() const override;
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/** \copydoc openbrace */
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JKQTMathTextBraceType getOpenbrace() const;
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/** \copydoc closebrace */
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JKQTMathTextBraceType getClosebrace() const;
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protected:
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/** \brief defines the size of the node (JKQTMathTextNodeSize) and additional information */
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struct NodeSize: public JKQTMathTextNodeSize {
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NodeSize();
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NodeSize(const NodeSize& other);
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NodeSize(const JKQTMathTextNodeSize& other);
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NodeSize& operator=(const NodeSize& other);
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NodeSize& operator=(const JKQTMathTextNodeSize& other);
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/** \brief width of the opening brace */
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double openBraceWidth;
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/** \brief height of the opening brace */
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double openBraceHeight;
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/** \brief width of the closing brace */
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double closeBraceWidth;
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/** \brief height of the closing brace */
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double closeBraceHeight;
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};
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/** \copydoc JKQTMathTextNode::getSizeInternal()
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*
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* \note This function internally calls getSizeInternalAndBrace() and returns part of its results.
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*/
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virtual JKQTMathTextNodeSize getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv) const override;
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/** calculates the size of this node (also returned by getSizeInternal() ) and of the brace */
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NodeSize getSizeInternalAndBrace(QPainter& painter, JKQTMathTextEnvironment currentEv) const;
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/**\brief opening brace */
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JKQTMathTextBraceType openbrace;
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/**\brief closing brace */
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JKQTMathTextBraceType closebrace;
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/** \brief calculate the width of the braces, fills JKQTMathTextBraceNode::NodeSize::openBraceWidth/JKQTMathTextBraceNode::NodeSize::closeBraceWidth and JKQTMathTextBraceNode::NodeSize::openBraceHeight/JKQTMathTextBraceNode::NodeSize::closeBraceHeight in \a out, based on \a childSize
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*
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* \param[out] out this function fills JKQTMathTextBraceNode::NodeSize::openBraceWidth/JKQTMathTextBraceNode::NodeSize::closeBraceWidth and JKQTMathTextBraceNode::NodeSize::openBraceHeight/JKQTMathTextBraceNode::NodeSize::closeBraceHeight in \a out
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* \param painter a QPainter used for size-calculation/drawing
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* \param currentEv font environment
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* \param childSize size of the child node surrounded by the node
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*/
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void calcBraceSizes(NodeSize& out, QPainter& painter, const JKQTMathTextEnvironment& currentEv, const JKQTMathTextNodeSize &childSize) const;
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/** \brief calculate the width and height of a brace, based on \a childSize
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*
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* \param fm QFontMetricsF object describing the font of the current environment
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* \param bracetype brace type
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* \param childSize size of the child node surrounded by the node
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*
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* \return width and hieght of the brace
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*/
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QSizeF calcBraceSize(const QFontMetricsF& fm, JKQTMathTextBraceType bracetype, const JKQTMathTextNodeSize &childSize) const;
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};
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#endif // JKQTMATHTEXTBRACENODE_H
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