/*
    <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());
}