mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-12-25 10:01:38 +08:00
115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
/*
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Copyright (c) 2008-2022 Jan W. Krieger (<jan@jkrieger.de>)
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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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#include "jkqtmathtext/jkqtmathtextlabel.h"
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#include <QDebug>
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#include <QApplication>
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JKQTMathTextLabel::JKQTMathTextLabel(QWidget *parent):
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QLabel(parent)
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{
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m_mathText=new JKQTMathText(this);
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m_mathText->useXITS();
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m_mathText->setFontSize(font().pointSizeF()*1.3);
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lastText="";
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repaintDo=true;
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buffer=QPixmap();
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}
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JKQTMathTextLabel::~JKQTMathTextLabel()
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= default;
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JKQTMathText *JKQTMathTextLabel::getMathText() const
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{
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return m_mathText;
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}
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void JKQTMathTextLabel::setMath(const QString &text, bool doRepaint)
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{
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if (text!=lastText || doRepaint){
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lastText=text;
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repaintDo=true;
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internalPaint();
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update();
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}
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}
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void JKQTMathTextLabel::internalPaint()
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{
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//return;
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//qDebug()<<"internalPaint "<<lastText<<repaintDo;
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//if (repaintDo) {
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QSizeF size;
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{
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repaintDo=false;
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//qDebug()<<"internalPaint(): parse "<<m_mathText->parse(lastText)<<"\n "<<m_mathText->getErrorList().join("\n")<<"\n\n";
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if (!m_mathText->parse(lastText)) {
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//qDebug()<<"JKQTMathTextLabel::internalPaint(): parse '"<<lastText<<"': "<<m_mathText->parse(lastText)<<"\n "<<m_mathText->getErrorList().join("\n")<<"\n\n";
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}
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if (buffer.width()<=0 || buffer.height()<=0) {
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const qreal dpr = devicePixelRatioF();
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buffer=QPixmap(1000*dpr,100*dpr);
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buffer.setDevicePixelRatio(dpr);
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}
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//qDebug()<<"internalPaint(): buffer "<<buffer.size();
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QPainter p;
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//qDebug()<<"internalPaint(): "<<p.begin(&buffer);
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p.begin(&buffer);
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p.setRenderHint(QPainter::Antialiasing);
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#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
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p.setRenderHint(QPainter::HighQualityAntialiasing);
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#endif
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p.setRenderHint(QPainter::TextAntialiasing);
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size=m_mathText->getSize(p);
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p.end();
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}
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const qreal dpr = devicePixelRatioF();
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buffer=QPixmap(static_cast<int>(qMax(32.0,size.width()*1.2))*dpr, static_cast<int>(qMax(10.0,size.height()*1.1))*dpr);
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buffer.setDevicePixelRatio(dpr);
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buffer.fill(Qt::transparent);
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{
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qDebug()<<"internalPaint(): buffer.size()="<<buffer.size()<<" size="<<size<<" dpr="<<dpr;
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QPainter p;
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//qDebug()<<"internalPaint(): "<<p.begin(&buffer);
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p.begin(&buffer);
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p.setRenderHint(QPainter::Antialiasing);
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#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
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p.setRenderHint(QPainter::HighQualityAntialiasing);
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#endif
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p.setRenderHint(QPainter::TextAntialiasing);
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m_mathText->draw(p,alignment(), QRectF(QPointF(0,0), size));
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p.end();
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}
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setPixmap(buffer);
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//}
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//qDebug()<<"internalPaint(): setPixmap";
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QApplication::processEvents();
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//qDebug()<<"internalPaint(): DONE";
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}
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void JKQTMathTextLabel::paintEvent(QPaintEvent *event)
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{
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QLabel::paintEvent(event);
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}
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