238 lines
8.0 KiB
C++
238 lines
8.0 KiB
C++
/*
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* Copyright 2008 by Aaron Seigo <aseigo@kde.org>
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* Copyright 2008 by Petri Damsten <damu@iki.fi>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef PLASMA_WALLPAPER_H
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#define PLASMA_WALLPAPER_H
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#include <KDE/KPluginInfo>
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#include <plasma/plasma.h>
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#include <plasma/version.h>
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namespace Plasma
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{
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class WallpaperPrivate;
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/**
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* @class Wallpaper plasma/wallpaper.h <Plasma/Wallpaper>
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*
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* @short The base Wallpaper class
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*
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* "Wallpapers" are components that paint the background for Containments that
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* do not provide their own background rendering.
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*
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* Wallpaper plugins are registered using .desktop files. These files should be
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* named using the following naming scheme:
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*
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* plasma-wallpaper-<pluginname>.desktop
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*
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* If a wallpaper plugin provides more than on mode (e.g. Single Image, Wallpaper)
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* it should include a Actions= entry in the .desktop file, listing the possible
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* actions. An actions group should be included to provide for translatable names.
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*/
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class PLASMA_EXPORT Wallpaper : public QObject
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{
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Q_OBJECT
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Q_PROPERTY(QRectF boundingRect READ boundingRect WRITE setBoundingRect)
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Q_PROPERTY(QString name READ name)
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Q_PROPERTY(QString pluginName READ pluginName)
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Q_PROPERTY(QString icon READ icon)
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Q_PROPERTY(KServiceAction renderingMode READ renderingMode)
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Q_PROPERTY(QList<KServiceAction> listRenderingModes READ listRenderingModes)
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Q_PROPERTY(QRectF boundingRect READ boundingRect WRITE setBoundingRect)
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public:
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~Wallpaper();
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/**
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* Returns a list of all known wallpapers.
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*
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* @return list of wallpapers
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**/
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static KPluginInfo::List listWallpaperInfo(const QString &formFactor = QString());
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/**
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* Attempts to load an wallpaper
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*
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* Returns a pointer to the wallpaper if successful.
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* The caller takes responsibility for the wallpaper, including
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* deleting it when no longer needed.
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*
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* @param name the plugin name, as returned by KPluginInfo::pluginName()
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* @param args to send the wallpaper extra arguments
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* @return a pointer to the loaded wallpaper, or 0 on load failure
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**/
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static Wallpaper* load(const QString &name, const QVariantList& args = QVariantList());
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/**
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* Attempts to load an wallpaper
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*
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* Returns a pointer to the wallpaper if successful.
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* The caller takes responsibility for the wallpaper, including
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* deleting it when no longer needed.
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*
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* @param info KPluginInfo object for the desired wallpaper
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* @param args to send the wallpaper extra arguments
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* @return a pointer to the loaded wallpaper, or 0 on load failure
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**/
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static Wallpaper* load(const KPluginInfo& info, const QVariantList& args = QVariantList());
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/**
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* Returns the user-visible name for the wallpaper, as specified in the
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* .desktop file.
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*
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* @return the user-visible name for the wallpaper.
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**/
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QString name() const;
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/**
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* Returns the plugin name for the wallpaper
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*/
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QString pluginName() const;
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/**
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* Returns the icon related to this wallpaper
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**/
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QString icon() const;
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/**
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* @return the currently active rendering mode
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*/
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KServiceAction renderingMode() const;
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/**
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* Returns modes the wallpaper has, as specified in the
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* .desktop file.
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*/
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QList<KServiceAction> listRenderingModes() const;
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/**
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* Returns bounding rectangle
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*/
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QRectF boundingRect() const;
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/**
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* Sets bounding rectangle
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*/
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void setBoundingRect(const QRectF& boundingRect);
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/**
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* This method is called when the wallpaper should be painted.
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*
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* @param painter the QPainter to use to do the painting
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* @param exposedRect the rect to paint within
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**/
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virtual void paint(QPainter *painter, const QRectF& exposedRect) = 0;
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/**
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* This method should be called once the wallpaper is loaded or mode is changed.
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* @param config Config group to load settings
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* @param mode One of the modes supported by the plugin,
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* or an empty string for the default mode.
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* @see init
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**/
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void restore(const KConfigGroup &config, const QString &mode = QString());
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/**
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* This method is called when settings need to be saved.
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* @param config Config group to save settings
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**/
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virtual void save(KConfigGroup &config);
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/**
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* Returns widget for configuration dialog.
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*/
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virtual QWidget *createConfigurationInterface(QWidget *parent);
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/**
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* Mouse move event. To prevent further propagation of the event,
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* the event must be accepted.
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*
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* @param event the mouse event object
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*/
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virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
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/**
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* Mouse press event. To prevent further propagation of the even,
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* and to receive mouseMoveEvents, the event must be accepted.
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*
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* @param event the mouse event object
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*/
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virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
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/**
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* Mouse release event. To prevent further propagation of the event,
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* the event must be accepted.
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*
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* @param event the mouse event object
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*/
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virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
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/**
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* Mouse wheel event. To prevent further propagation of the event,
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* the event must be accepted.
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*
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* @param event the wheel event object
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*/
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virtual void wheelEvent(QGraphicsSceneWheelEvent *event);
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Q_SIGNALS:
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/**
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* This signal indicates that wallpaper needs to be repainted.
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*/
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void update(const QRectF &exposedArea);
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protected:
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/**
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* This constructor is to be used with the plugin loading systems
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* found in KPluginInfo and KService. The argument list is expected
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* to have one element: the KService service ID for the desktop entry.
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*
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* @param parent a QObject parent; you probably want to pass in 0
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* @param args a list of strings containing one entry: the service id
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*/
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Wallpaper(QObject* parent, const QVariantList& args);
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/**
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* This method is called once the wallpaper is loaded or mode is changed.
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* The mode can be retrieved using the @see renderMode() method.
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* @param config Config group to load settings
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* @param mode One of the modes supported by the plugin,
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* or an empty string for the default mode.
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**/
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virtual void init(const KConfigGroup &config);
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private:
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WallpaperPrivate* const d;
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};
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} // Plasma namespace
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/**
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* Register an wallpaper when it is contained in a loadable module
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*/
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#define K_EXPORT_PLASMA_WALLPAPER(libname, classname) \
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K_PLUGIN_FACTORY(factory, registerPlugin<classname>();) \
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K_EXPORT_PLUGIN(factory("plasma_wallpaper_" #libname)) \
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K_EXPORT_PLUGIN_VERSION(PLASMA_VERSION)
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#endif // multiple inclusion guard
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