/* * Copyright 2007 Aaron Seigo * Copyright 2007 Matt Broadstone * * 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_CORONA_H #define PLASMA_CORONA_H #include #include #include #include class QGraphicsGridLayout; class QAction; namespace Plasma { class Containment; class CoronaPrivate; /** * @class Corona plasma/corona.h * * @short A QGraphicsScene for Plasma::Applets */ class PLASMA_EXPORT Corona : public QGraphicsScene { Q_OBJECT //typedef QHash > layouts; public: explicit Corona(QObject * parent = 0); ~Corona(); /** * Sets the mimetype of Drag/Drop items. Default is * text/x-plasmoidservicename */ void setAppletMimeType(const QString &mimetype); /** * The current mime type of Drag/Drop items. */ QString appletMimeType(); /** * @return all containments on this Corona */ QList containments() const; /** * Clear the Corona from all applets. */ void clearContainments(); /** * Returns the config file used to store the configuration for this Corona */ KSharedConfig::Ptr config() const; /** * Adds a Containment to the Corona * * @param name the plugin name for the containment, as given by * KPluginInfo::pluginName(). If an empty string is passed in, the defalt * containment plugin will be used (usually DesktopContainment). If the * string literal "null" is passed in, then no plugin will be loaded and * a simple Containment object will be created instead. * @param args argument list to pass to the containment * * @return a pointer to the containment on success, or 0 on failure */ Containment *addContainment(const QString &name, const QVariantList &args = QVariantList()); /** * Returns the Containment, if any, for a given physical screen * * @param screen number of the physical screen to locate * @param desktop the virtual desktop) to locate; if < 0 then it will * simply return the first Containment associated with screen */ Containment *containmentForScreen(int screen, int desktop = -1) const; /** * Adds a widget in the topleft quadrant in the scene. Widgets in the topleft quadrant are * normally never shown unless you specifically aim a view at it, which makes it ideal for * toplevel views etc. * @param widget the widget to add. */ void addOffscreenWidget(QGraphicsWidget *widget); /** * Removes a widget from the topleft quadrant in the scene. * @param widget the widget to remove. */ void removeOffscreenWidget(QGraphicsWidget *widget); /** * @return the list of all offscreen widgets * @since 4.3 */ QList offscreenWidgets() const; /** * Returns the number of screens available to plasma. * Subclasses should override this method as the default * implementation returns a meaningless value. */ virtual int numScreens() const; /** * Returns the geometry of a given screen. * Valid screen ids are 0 to numScreen()-1, or -1 for the full desktop geometry. * Subclasses should override this method as the default * implementation returns a meaningless value. */ virtual QRect screenGeometry(int id) const; /** * Returns the available region for a given screen. * The available region excludes panels and similar windows. * Valid screen ids are 0 to numScreens()-1. * By default this method returns a rectangular region * equal to screenGeometry(id); subclasses that need another * behavior should override this method. */ virtual QRegion availableScreenRegion(int id) const; /** * Recommended position for a popup window like a menu or a tooltip * given its size * @param item the item that the popup should appear adjacent to (an applet, say) * @param size size of the popup * @returns reccomended position */ QPoint popupPosition(const QGraphicsItem *item, const QSize &size); /** * This method is useful in order to retrieve the list of available * screen edges for panel type containments. * @param screen the id of the screen to look for free edges. * @returns a list of free edges not filled with panel type containments. */ QList freeEdges(int screen) const; /** * Returns the QAction with the given name from our collection */ QAction *action(QString name) const; /** * Adds the action to our collection under the given name */ void addAction(QString name, QAction *action); /** * Returns all the actions in our collection */ QList actions() const; /** * convenience function - enables or disables an action by name * * @param name the name of the action in our collection * @param enable true to enable, false to disable */ void enableAction(const QString &name, bool enable); /** * @since 4.3 * Updates keyboard shortcuts for all the corona's actions. * If you've added actions to the corona you'll need to * call this for them to be configurable. */ void updateShortcuts(); /** * @since 4.3 * Adds a set of actions to the shortcut config dialog. * don't use this on actions in the corona's own actioncollection, * those are handled automatically. this is for stuff outside of that. */ void addShortcuts(KActionCollection *newShortcuts); public Q_SLOTS: /** * Initializes the layout from a config file. This will first clear any existing * Containments, load a layout from the requested configuration file, request the * default layout if needed and update immutability. * * @param config the name of the config file to load from, * or the default config file if QString() */ void initializeLayout(const QString &config = QString()); /** * Load applet layout from a config file. The results will be added to the * current set of Containments. * * @param config the name of the config file to load from, * or the default config file if QString() */ void loadLayout(const QString &config = QString()); /** * Save applets layout to file * @arg config the file to save to, or the default config file if QString() */ void saveLayout(const QString &config = QString()) const; /** * @return The type of immutability of this Corona */ ImmutabilityType immutability() const; /** * Sets the immutability type for this Corona (not immutable, * user immutable or system immutable) * @arg immutable the new immutability type of this applet */ void setImmutability(const ImmutabilityType immutable); /** * Schedules a flush-to-disk synchronization of the configuration state * at the next convenient moment. */ void requestConfigSync(); /** * Schedules a time sensitive flush-to-disk synchronization of the * configuration state. Since this method does not provide any sort of * event compression, it should only be used when an *immediate* disk * sync is *absolutely* required. Otherwise, use @see requestConfigSync() * which does do event compression. */ void requireConfigSync(); Q_SIGNALS: /** * This signal indicates a new containment has been added to * the Corona */ void containmentAdded(Plasma::Containment *containment); /** * This signal indicates that a containment has been newly * associated (or dissociated) with a physical screen. * * @param wasScreen the screen it was associated with * @param isScreen the screen it is now associated with * @param containment the containment switching screens */ void screenOwnerChanged(int wasScreen, int isScreen, Plasma::Containment *containment); /** * This signal indicates that an application launch, window * creation or window focus event was triggered. This is used, for instance, * to ensure that the Dashboard view in Plasma hides when such an event is * triggered by an item it is displaying. */ void releaseVisualFocus(); /** * This signal indicates that the configuration file was flushed to disc. */ void configSynced(); /** * This signal inicates that a change in available screen goemetry occurred. */ void availableScreenRegionChanged(); /** * emitted when immutability changes. * this is for use by things that don't get contraints events, like plasmaapp. * it's NOT for containments or applets or any of the other stuff on the scene. * if your code's not in shells/ it probably shouldn't be using it. */ void immutabilityChanged(Plasma::ImmutabilityType immutability); /** * @since 4.3 * emitted when the user changes keyboard shortcut settings * connect to this if you've put some extra shortcuts in your app * that are NOT in corona's actioncollection. * if your code's not in shells/ it probably shouldn't be using this function. * @see addShortcuts */ void shortcutsChanged(); protected: /** * Loads the default (system wide) layout for this user **/ virtual void loadDefaultLayout(); /** * Loads a containment with delayed initialization, primarily useful * for implementations of loadDefaultLayout. The caller is responsible * for all initializating, saving and notification of a new containment. * * @param name the plugin name for the containment, as given by * KPluginInfo::pluginName(). If an empty string is passed in, the defalt * containment plugin will be used (usually DesktopContainment). If the * string literal "null" is passed in, then no plugin will be loaded and * a simple Containment object will be created instead. * @param args argument list to pass to the containment * * @return a pointer to the containment on success, or 0 on failure **/ Containment *addContainmentDelayed(const QString &name, const QVariantList &args = QVariantList()); //Reimplemented from QGraphicsScene void dragEnterEvent(QGraphicsSceneDragDropEvent *event); void dragLeaveEvent(QGraphicsSceneDragDropEvent *event); void dragMoveEvent(QGraphicsSceneDragDropEvent *event); private: CoronaPrivate *const d; Q_PRIVATE_SLOT(d, void containmentDestroyed(QObject*)) Q_PRIVATE_SLOT(d, void offscreenWidgetDestroyed(QObject *)) Q_PRIVATE_SLOT(d, void syncConfig()) Q_PRIVATE_SLOT(d, void toggleImmutability()) Q_PRIVATE_SLOT(d, void showShortcutConfig()) friend class CoronaPrivate; }; } // namespace Plasma #endif