screenshotgrabber.h

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/*
    Copyright © 2015-2019 by The qTox Project Contributors
 
    This file is part of qTox, a Qt-based graphical interface for Tox.
 
    qTox 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.
 
    qTox 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 qTox.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#pragma once
 
#include <QPixmap>
#include <QPointer>
 
class QGraphicsSceneMouseEvent;
class QGraphicsPixmapItem;
class QGraphicsRectItem;
class QGraphicsTextItem;
class QGraphicsScene;
class QGraphicsView;
class QKeyEvent;
class ScreenGrabberChooserRectItem;
class ScreenGrabberOverlayItem;
class ToolBoxGraphicsItem;
 
class ScreenshotGrabber : public QObject
{
    Q_OBJECT
public:
    ScreenshotGrabber();
    ~ScreenshotGrabber() override;
 
    bool eventFilter(QObject* object, QEvent* event) override;
 
    void showGrabber();
 
public slots:
    void acceptRegion();
    void reInit();
 
signals:
    void screenshotTaken(const QPixmap& pixmap);
    void regionChosen(QRect region);
    void rejected();
 
private:
    friend class ScreenGrabberOverlayItem;
    bool mKeysBlocked;
 
    void setupScene();
 
    void useNothingSelectedTooltip();
    void useRegionSelectedTooltip();
    void chooseHelperTooltipText(QRect rect);
    void adjustTooltipPosition();
 
    bool handleKeyPress(QKeyEvent* event);
    void reject();
 
    QPixmap grabScreen();
 
    void hideVisibleWindows();
    void restoreHiddenWindows();
 
    void beginRectChooser(QGraphicsSceneMouseEvent* event);
 
private:
    QPixmap screenGrab;
    QGraphicsScene* scene;
    QGraphicsView* window;
    QGraphicsPixmapItem* screenGrabDisplay;
    ScreenGrabberOverlayItem* overlay;
    ScreenGrabberChooserRectItem* chooserRect;
    ToolBoxGraphicsItem* helperToolbox;
    QGraphicsTextItem* helperTooltip;
 
    qreal pixRatio = 1.0;
 
    bool mQToxVisible;
    QVector<QPointer<QWidget>> mHiddenWindows;
};