mirror of
https://bitbucket.org/smil3y/kde-workspace.git
synced 2025-02-23 18:32:50 +00:00
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/*
|
|
* Copyright © 2008 Fredrik Höglund <fredrik@kde.org>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
|
|
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef FADEEFFECT_H
|
|
#define FADEEFFECT_H
|
|
|
|
#include <QObject>
|
|
#include <QtCore/qdatetime.h>
|
|
|
|
#include "logouteffect.h"
|
|
#include <X11/Xlib.h>
|
|
|
|
|
|
class QWidget;
|
|
class QPixmap;
|
|
class BlendingThread;
|
|
|
|
|
|
/**
|
|
* This class implements an effect that will slowly fade the screen from color to grayscale.
|
|
*
|
|
* This class is X11 specific, and currently only works on little-endian systems where
|
|
* the root window has a 24/32 or 16 bit r5g6b5 pixel format.
|
|
*/
|
|
class FadeEffect : public LogoutEffect
|
|
{
|
|
Q_OBJECT
|
|
|
|
public:
|
|
/**
|
|
* Creates the FadeEffect.
|
|
*
|
|
* This effect will grab a screenshot and then slowly fade it to gray,
|
|
* rendering each frame on the pixmap you pass to the constructor.
|
|
* The animation will begin when you call start(), and each time the
|
|
* pixmap is updated, update() will be called in the @p parent widget,
|
|
* which must then paint the pixmap.
|
|
*
|
|
* The actual blending is done in a separate thread to keep the event
|
|
* loop alive.
|
|
*
|
|
* The FadeEffect can safely be deleted at any time, even while the
|
|
* effect is running, but it's important that the pixmap isn't deleted
|
|
* before the effect object.
|
|
*
|
|
* @param parent The parent widget, which will draw the pixmap.
|
|
* @param pixmap The pixmap the effect will be rendered to.
|
|
*/
|
|
FadeEffect(QWidget *parent, QPixmap *pixmap);
|
|
|
|
/**
|
|
* Destroys the fade effect.
|
|
*/
|
|
~FadeEffect();
|
|
|
|
/**
|
|
* Starts the animation.
|
|
*/
|
|
void start();
|
|
|
|
private slots:
|
|
/** @internal */
|
|
void grabImageSection();
|
|
|
|
/** @internal */
|
|
void nextFrame();
|
|
|
|
private:
|
|
BlendingThread *blender;
|
|
int alpha;
|
|
int currentY;
|
|
bool done;
|
|
XImage *image;
|
|
GC gc;
|
|
QTime time;
|
|
};
|
|
|
|
#endif
|
|
|