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#include "scribblewidget.h"
ScribbleWidget::ScribbleWidget(QWidget *parent)
: QWidget(parent)
{
scribbling = false;
}
void ScribbleWidget::resizeEvent(QResizeEvent *e)
{
image = QImage(e->size(), QImage::Format_RGB32);
image.fill(QColor(Qt::white).rgb());
}
void ScribbleWidget::mousePressEvent(QMouseEvent *event)
{
if (event->button() != Qt::LeftButton)
return;
lastPoint = event->pos();
scribbling = true;
}
void ScribbleWidget::mouseMoveEvent(QMouseEvent *event)
{
if ((event->buttons() & Qt::LeftButton) && scribbling)
drawLineTo(event->pos());
}
void ScribbleWidget::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton && scribbling) {
drawLineTo(event->pos());
scribbling = false;
}
}
void ScribbleWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.drawImage(QPoint(0, 0), image);
}
void ScribbleWidget::drawLineTo(const QPoint &endPoint)
{
QPainter painter(&image);
painter.setPen(QPen(Qt::blue, 1, Qt::SolidLine,
Qt::RoundCap, Qt::RoundJoin));
painter.drawLine(lastPoint, endPoint);
update();
lastPoint = endPoint;
}
Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt 4.5.1 |