tools/templates/pixlabel.cpp
author nemo
Fri, 15 May 2009 02:14:13 +0000
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permissions -rw-r--r--
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#include <QPainter>
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#include <QPen>
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#include "pixlabel.h"
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PixLabel::PixLabel()
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		: QLabel(0)
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{
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}
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void PixLabel::paintEvent(QPaintEvent * event)
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{
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	QLabel::paintEvent(event);
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	QPainter p(this);
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	p.fillRect(QRect(0, 0, 1024, 512), QBrush(Qt::black));
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	if (rects.size())
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	{
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		p.setPen(QPen(Qt::lightGray));
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		QVector<QPoint> centers;
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		for(QList<QRect>::const_iterator it = rects.begin(); it != rects.end(); ++it)
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			centers.push_back((*it).center());
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		p.drawPolyline(QPolygon(centers));
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		p.setPen(QPen(Qt::white));
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		p.drawRects(rects.toVector());
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		p.setPen(QPen(Qt::yellow));
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		p.drawRect(rects.last());
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	}
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}
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void PixLabel::mousePressEvent(QMouseEvent * e)
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{
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	if (!rects.empty())
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	{
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		if (e->button() == Qt::LeftButton)
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			rects[rects.size() - 1].moveTopLeft(QPoint(e->x(), e->y()));
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		else
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		if (e->button() == Qt::RightButton)
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			rects[rects.size() - 1].setBottomRight(QPoint(e->x(), e->y()));
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		repaint();
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	}
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}
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void PixLabel::AddRect()
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{
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	rects.push_back(QRect(0, 0, 1, 1));
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	repaint();
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}