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lximage-qt-packaging/src/screenshotselectareagraphic...

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/*
<one line to give the library's name and an idea of what it does.>
Copyright (C) 2013 <copyright holder> <email>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "screenshotselectareagraphicsview.h"
#include <QMouseEvent>
using namespace LxImage;
ScreenshotSelectAreaGraphicsView::ScreenshotSelectAreaGraphicsView(QGraphicsScene* scene, QWidget* parent) : QGraphicsView(scene, parent)
{
p0_ = QPointF(-1.0, -1.0);
selectedAreaRect_ = nullptr;
setCursor(Qt::CrossCursor);
}
void ScreenshotSelectAreaGraphicsView::mousePressEvent(QMouseEvent *event)
{
if(p0_.x() < 0) {
p0_ = QPointF(event->pos());
} else {
if(selectedAreaRect_ == nullptr) {
QColor highlight = palette().color(QPalette::Active,QPalette::Highlight);
QPen pen(highlight, 3, Qt::DashDotLine, Qt::RoundCap, Qt::RoundJoin);
QColor color(highlight);
color.setAlpha(128);
QBrush brush(color);
selectedAreaRect_ = scene()->addRect(QRectF(), pen, brush);
}
selectedAreaRect_->setRect(QRectF(p0_,QPointF(event->pos())).normalized());
}
}
void ScreenshotSelectAreaGraphicsView::mouseMoveEvent(QMouseEvent *event)
{
mousePressEvent(event);
}
void ScreenshotSelectAreaGraphicsView::mouseReleaseEvent(QMouseEvent *event)
{
Q_EMIT selectedArea(QRectF(p0_,QPointF(event->pos())).normalized().toRect());
}