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paintwidget.cpp
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paintwidget.cpp
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#include "paintwidget.h"
#include <QPainter>
#include <QPen>
#include <QBrush>
#include <QDebug>
PaintWidget::PaintWidget(QWidget *parent) : QWidget(parent)
{
// m_nInitialX = 0;
// m_nInitialY = 0;
// m_nFinalX = 0;
// m_nFinalY = 0;
// m_nPTargetPixmap = 0;
// m_nPTargetPixmap = new QPixmap(400,400);
m_nPTargetPixmap = QPixmap(400,400);
m_nPTargetPixmap.fill();
m_nbMousePressed = false;
}
PaintWidget::~PaintWidget()
{
// delete ui;
}
void PaintWidget::mousePressEvent(QMouseEvent* event)
{
m_nbMousePressed = true;
// m_nInitialX = event->pos().x();
// m_nInitialY = event->pos().y();
m_line.setP1(event->pos());
m_line.setP2(event->pos());
}
void PaintWidget::mouseReleaseEvent(QMouseEvent *event)
{
m_nbMousePressed = false;
update();
}
void PaintWidget::paintEvent(QPaintEvent *e)
{
static bool wasPressed = false;
QPainter painter(this);
if(m_nbMousePressed)
{
painter.drawPixmap(0, 0, m_nPTargetPixmap);
painter.drawLine(m_line);
wasPressed = true;
}
else if(wasPressed)
{
QPainter PixmapPainter(&m_nPTargetPixmap);
QPen pen(Qt::green);
PixmapPainter.setPen(pen);
PixmapPainter.drawLine(m_line);
painter.drawPixmap(0, 0, m_nPTargetPixmap);
wasPressed = false;
}
}
void PaintWidget::mouseMoveEvent(QMouseEvent *event)
{
if (event->type() == QEvent::MouseMove)
{
// QPainter PixmapPainter(m_nPTargetPixmap);
// QPen pen(Qt::black);
// PixmapPainter.setPen(pen);
// PixmapPainter.drawLine(m_nInitialX, m_nInitialY, m_nFinalX, m_nFinalY);
// m_nFinalX = event->pos().x();
// m_nFinalY = event->pos().y();
m_line.setP2(event->pos());
// update(); // update your view
}
update(); // update your view
}