/* * Copyright 2007 by Aaron Seigo * * 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_CONTAINMENT_H #define PLASMA_CONTAINMENT_H #include #include #include #include #include #include #include namespace Plasma { class AppletHandle; class DataEngine; class Package; class Corona; /** * @short The base class for plugins that provide backgrounds and applet grouping containers * * Containment objects provide the means to group applets into functional sets. * They also provide the following: * * - drawing of the background image (which can be interactive) * - form factors (e.g. panel, desktop, full screen, etc) * - applet layout management * * Since containment is actually just a Plasma::Applet, all the techniques used * for writing the visual presentation of Applets is applicable to Containtments. * Containments are differentiated from Applets by being marked with the ServiceType * of Plasma/Containment. Plugins registered with both the Applet and the Containment * ServiceTypes can be loaded for us in either situation. * * See techbase.kde.org for a tutorial on writing Containments using this class. */ class PLASMA_EXPORT Containment : public Applet { Q_OBJECT public: typedef QList List; typedef QHash Dict; enum Type { DesktopContainment = 0 /**< A desktop containment */, PanelContainment /**< A desktop panel */, CustomContainment /**< A containment that is neither a desktop nor a panel, but something application specific */ }; /** * @arg parent the QGraphicsItem this applet is parented to * @arg servideId the name of the .desktop file containing the * information about the widget * @arg appletId a unique id used to differentiate between multiple * instances of the same Applet type */ explicit Containment(QGraphicsItem* parent = 0, const QString& serviceId = QString(), uint containmentId = 0); /** * This constructor is to be used with the plugin loading systems * found in KPluginInfo and KService. The argument list is expected * to have two elements: the KService service ID for the desktop entry * and an applet ID which must be a base 10 number. * * @arg parent a QObject parent; you probably want to pass in 0 * @arg args a list of strings containing two entries: the service id * and the applet id */ Containment(QObject* parent, const QVariantList& args); ~Containment(); /** * Reimplemented from Applet */ void init(); /** * Returns the type of containment */ virtual Type containmentType() const; /** * Returns the current form factor the applets in this Containment * are being displayed in. * * @see Plasma::FormFactor */ FormFactor formFactor() const; /** * Returns the location of this Containment * * @see Plasma::Location */ Location location() const; /** * Returns a list of all known containments. * * @param category Only applets matchin this category will be returned. * Useful in conjunction with knownCategories. * If "Misc" is passed in, then applets without a * Categories= entry are also returned. * If an empty string is passed in, all applets are * returned. * @param parentApp the application to filter applets on. Uses the * X-KDE-ParentApp entry (if any) in the plugin info. * The default value of QString() will result in a * list containing only applets not specifically * registered to an application. * @return list of applets **/ static KPluginInfo::List knownContainments(const QString &category = QString(), const QString &parentApp = QString()); /** * Returns a list of all known applets associated with a certain mimetype * * @return list of applets **/ static KPluginInfo::List knownContainmentsForMimetype(const QString &mimetype); /** * Adds an applet to this Containment * * @param name the plugin name for the applet, as given by * KPluginInfo::pluginName() * @param args argument list to pass to the plasmoid * @param id to assign to this applet, or 0 to auto-assign it a new id * @param geometry where to place the applet, or to auto-place it if an invalid * is provided * @param delayedInit if true, init() will not be called on the applet * * @return a pointer to the applet on success, or 0 on failure */ Applet* addApplet(const QString& name, const QVariantList& args = QVariantList(), uint id = 0, const QRectF &geometry = QRectF(-1, -1, -1, -1), bool delayedInit = false); /** * @return the applets currently in this Containment */ Applet::List applets() const; /** * Removes all applets from this Containment */ void clearApplets(); /** * add existing applet to this containment */ void addApplet(Applet * applet); /** * Sets the physical screen this Containment is associated with. * * @param screen the screen number this containment is the desktop for, or -1 * if it is not serving as the desktop for any screen */ void setScreen(int screen); /** * @return the screen number this containment is serving as the desktop for * or -1 if none */ int screen() const; /** * @internal */ void saveConstraints(KConfigGroup* group) const; /** * @internal */ void loadConstraints(KConfigGroup* group); /** * Emits the launchActivated() signal */ void emitLaunchActivated(); /** * Adds an item to the toolbox. The toolbox takes over ownership of the item. * TODO: add remove and accessor methods */ void addToolBoxTool(QGraphicsItem *tool); /** * @internal * Called when constraints have been updated on this containment to provide * constraint services common to all containments. Containments should still * implement their own constraintsUpdated method */ void containmentConstraintsUpdated(Plasma::Constraints constraints); Q_SIGNALS: /** * This signal is emitted when a new applet is created by the containment */ void appletAdded(Plasma::Applet* applet); /** * This signal indicates, that a application launch was triggered */ void launchActivated(); /** * Emitted when the containment requests zooming out one step. * Usually only used for desktop containments. */ void zoomIn(); /** * Emitted when the containment requests zooming out one step. * Usually only used for desktop containments. */ void zoomOut(); /** * Emitted when the containment requests an add widgets dialog is shown. * Usually only used for desktop containments. */ void showAddWidgets(); public Q_SLOTS: /** * Informs the Corona as to what position it is in. This is informational * only, as the Corona doesn't change it's actual location. This is, * however, passed on to Applets that may be managed by this Corona. * * @param location the new location of this Corona */ void setLocation(Plasma::Location location); /** * Sets the form factor for this Corona. This may cause changes in both * the arrangement of Applets as well as the display choices of individual * Applets. */ void setFormFactor(Plasma::FormFactor formFactor); /** * Returns the Corona (if any) that this Containment is hosted by */ Corona* corona() const; protected: void contextMenuEvent(QGraphicsSceneContextMenuEvent * event); void hoverEnterEvent(QGraphicsSceneHoverEvent *event); void hoverLeaveEvent(QGraphicsSceneHoverEvent *event); bool sceneEventFilter(QGraphicsItem *watched, QEvent *event); protected Q_SLOTS: /** * @internal */ void appletDestroyed(QObject*); void appletAnimationComplete(QGraphicsItem *item, Plasma::Phase::Animation anim); void dropEvent(QGraphicsSceneDragDropEvent* event); private Q_SLOTS: void handleDisappeared(AppletHandle *handle); void destroyApplet(); private: Q_DISABLE_COPY(Containment) class Private; Private* const d; }; } // Plasma namespace #endif // multiple inclusion guard