selectareadialog.cpp

/***************************************************************************
 * Copyright (C) 2015 by Savoir-Faire Linux                                *
 * Author: Edric Ladent Milaret <edric.ladent-milaret@savoirfairelinux.com>*
 *                                                                         *
 * This program is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU General Public License as published by    *
 * the Free Software Foundation; either version 3 of the License, or       *
 * (at your option) any later version.                                     *
 *                                                                         *
 * This program 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 General Public License for more details.                            *
 *                                                                         *
 * You should have received a copy of the GNU General Public License       *
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.   *
 **************************************************************************/

#include "selectareadialog.h"

#include <QApplication>
#include <QScreen>
#include <QPainter>

#include "video/sourcemodel.h"

SelectAreaDialog::SelectAreaDialog() :
    rubberBand_(nullptr)
{
    setWindowFlags(Qt::Widget | Qt::FramelessWindowHint);
    setWindowState(Qt::WindowFullScreen);
    setParent(0);
    setAutoFillBackground(false);
    setAttribute(Qt::WA_NoSystemBackground, false);
    setAttribute(Qt::WA_TranslucentBackground, true);
    setAttribute(Qt::WA_PaintOnScreen);
    grabMouse();
    rubberBand_ = new QRubberBand(QRubberBand::Rectangle,0);
    QApplication::setOverrideCursor(Qt::CrossCursor);
    QScreen *screen = QGuiApplication::primaryScreen();
    if (screen)
        originalPixmap_ = screen->grabWindow(0);
}

void
SelectAreaDialog::mousePressEvent(QMouseEvent* event)
{
    if (rubberBand_) {
        origin_ = event->globalPos();
        rubberBand_->setGeometry(QRect(origin_, QSize()));
        rubberBand_->show();
    }
}

void
SelectAreaDialog::mouseMoveEvent(QMouseEvent* event)
{
  if (rubberBand_)
      rubberBand_->setGeometry(QRect(origin_, event->globalPos()));
}

void
SelectAreaDialog::mouseReleaseEvent(QMouseEvent* event)
{
    Q_UNUSED(event)

    if(rubberBand_) {
        QApplication::restoreOverrideCursor();
        releaseMouse();
        Video::SourceModel::instance()->setDisplay(0, rubberBand_->rect());
        delete rubberBand_;
        rubberBand_ = nullptr;
        reject();
    }
}

void
SelectAreaDialog::paintEvent(QPaintEvent* event) {
    Q_UNUSED(event)
    QPainter painter(this);

    painter.drawPixmap(QPoint(0, 0), originalPixmap_);
}