plasma-framework/scripting/wallpaperscript.h
2012-02-21 00:11:36 +01:00

192 lines
6.2 KiB
C++

/*
* Copyright 2009 by Aaron Seigo <aseigo@kde.org>
* Copyright 2009 by Petri Damsten <damu@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, 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 Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef PLASMA_WALLPAPERSCRIPT_H
#define PLASMA_WALLPAPERSCRIPT_H
#include <kplugininfo.h>
#include <plasma/plasma_export.h>
#include <plasma/scripting/scriptengine.h>
#include <plasma/wallpaper.h>
namespace Plasma
{
class WallpaperScriptPrivate;
class Service;
/**
* @class WallpaperScript plasma/scripting/wallpaperscript.h <Plasma/Scripting/WallpaperScript>
*
* @short Provides a restricted interface for scripting a Wallpaper
*/
class PLASMA_EXPORT WallpaperScript : public ScriptEngine
{
Q_OBJECT
public:
/**
* Default constructor for a WallpaperScript.
* Subclasses should not attempt to access the Plasma::Wallpaper
* associated with this WallpaperScript in the constructor. All
* such set up that requires the Wallpaper itself should be done
* in the init() method.
*/
explicit WallpaperScript(QObject *parent = 0);
~WallpaperScript();
/**
* Sets the Plasma::Wallpaper associated with this WallpaperScript
*/
void setWallpaper(Wallpaper *wallpaper);
/**
* Returns the Plasma::Wallpaper associated with this script component
*/
Wallpaper *wallpaper() const;
/**
* This method is called once the wallpaper is loaded or mode is changed.
*
* The mode can be retrieved using the renderingMode() method.
*
* @param config Config group to load settings
**/
virtual void initWallpaper(const KConfigGroup &config);
/**
* This method is called when the wallpaper should be painted.
*
* @param painter the QPainter to use to do the painting
* @param exposedRect the rect to paint within
**/
virtual void paint(QPainter *painter, const QRectF &exposedRect);
/**
* This method is called when settings need to be saved.
* @param config Config group to save settings
**/
virtual void save(KConfigGroup &config);
/**
* Returns a widget that can be used to configure the options (if any)
* associated with this wallpaper. It will be deleted by the caller
* when it complete. The default implementation returns a null pointer.
*
* To signal that settings have changed connect to
* settingsChanged(bool modified) in @p parent.
*
* @code connect(this, SIGNAL(settingsChanged(bool), parent, SLOT(settingsChanged(bool)))
* @endcode
*
* Emit settingsChanged(true) when the settings are changed and false when the original state is restored.
*
* Implementation detail note: for best visual results, use a QGridLayout with two columns,
* with the option labels in column 0
*/
virtual QWidget *createConfigurationInterface(QWidget *parent);
/**
* Mouse move event. To prevent further propagation of the event,
* the event must be accepted.
*
* @param event the mouse event object
*/
virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
/**
* Mouse press event. To prevent further propagation of the even,
* and to receive mouseMoveEvents, the event must be accepted.
*
* @param event the mouse event object
*/
virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
/**
* Mouse release event. To prevent further propagation of the event,
* the event must be accepted.
*
* @param event the mouse event object
*/
virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
/**
* Mouse wheel event. To prevent further propagation of the event,
* the event must be accepted.
*
* @param event the wheel event object
*/
virtual void wheelEvent(QGraphicsSceneWheelEvent *event);
/**
* Adds urls (e.g. from a drop)
*/
virtual void addUrls(const KUrl::List urls);
protected:
/**
* @return absolute path to the main script file for this wallpaper
*/
QString mainScript() const;
/**
* @return the Package associated with this wallpaper which can
* be used to request resources, such as images and
* interface files.
*/
Package package() const;
/**
* @return the KPluginInfo associated with this wallpaper
*/
KPluginInfo description() const;
bool isInitialized() const;
QRectF boundingRect() const;
DataEngine *dataEngine(const QString &name) const;
void setResizeMethodHint(Wallpaper::ResizeMethod resizeMethod);
void setTargetSizeHint(const QSizeF &targetSize);
void setConfigurationRequired(bool needsConfiguring, const QString &reason = QString());
void render(const QString &sourceImagePath, const QSize &size,
Wallpaper::ResizeMethod resizeMethod = Plasma::Wallpaper::ScaledResize,
const QColor &color = QColor(0, 0, 0));
void setUsingRenderingCache(bool useCache);
bool findInCache(const QString &key, QImage &image, unsigned int lastModified = 0);
void insertIntoCache(const QString& key, const QImage &image);
void setContextualActions(const QList<QAction*> &actions);
void update(const QRectF &exposedArea);
void configNeedsSaving();
protected Q_SLOTS:
virtual void renderCompleted(const QImage &image);
private:
WallpaperScriptPrivate *const d;
};
#define K_EXPORT_PLASMA_WALLPAPERSCRIPTENGINE(libname, classname) \
K_PLUGIN_FACTORY(factory, registerPlugin<classname>();) \
K_EXPORT_PLUGIN(factory("plasma_wallpaperscriptengine_" #libname))
} //Plasma namespace
#endif