tools/templates/pixlabel.cpp
author koda
Sun, 27 Jan 2013 00:00:33 +0100
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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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}