qTox/src/widget/tool/screengrabberoverlayitem.cpp

/*
    Copyright (C) 2014 by Project Tox <https://tox.im>

    This file is part of qTox, a Qt-based graphical interface for Tox.

    This program is libre 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 COPYING file for more details.
*/

#include "screengrabberoverlayitem.h"

#include <QGraphicsSceneMouseEvent>
#include <QPainter>
#include <QPen>
#include <QStyleOptionGraphicsItem>

#include "screenshotgrabber.h"

ScreenGrabberOverlayItem::ScreenGrabberOverlayItem(ScreenshotGrabber* grabber)
    : screnshootGrabber(grabber)
{
    
    QBrush overlayBrush(QColor(0x00, 0x00, 0x00, 0x70)); // Translucent black
    
    setCursor(QCursor(Qt::CrossCursor));
    setBrush(overlayBrush);
    setPen(QPen(Qt::NoPen));
    
}

ScreenGrabberOverlayItem::~ScreenGrabberOverlayItem()
{
    
}

void ScreenGrabberOverlayItem::setChosenRect(QRect rect)
{
    QRect oldRect = chosenRect;
    chosenRect = rect;
    update(oldRect.united(rect));
}

void ScreenGrabberOverlayItem::mousePressEvent(QGraphicsSceneMouseEvent* event)
{
    if (event->button() == Qt::LeftButton)
        this->screnshootGrabber->beginRectChooser(event);
    
}

void ScreenGrabberOverlayItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    painter->setBrush(brush());
    painter->setPen(pen());
    
    QRectF self = rect();
    qreal leftX = chosenRect.x();
    qreal rightX = chosenRect.x() + chosenRect.width();
    qreal topY = chosenRect.y();
    qreal bottomY = chosenRect.y() + chosenRect.height();
    
    painter->drawRect(0, 0, leftX, self.height()); // Left of chosen
    painter->drawRect(rightX, 0, self.width() - rightX, self.height()); // Right of chosen
    painter->drawRect(leftX, 0, chosenRect.width(), topY); // Top of chosen
    painter->drawRect(leftX, bottomY, chosenRect.width(), self.height() - bottomY); // Bottom of chosen
}