263 lines
8.5 KiB
C++
263 lines
8.5 KiB
C++
/*
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* Copyright 2007 Aaron Seigo <aseigo@kde.org>
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* Copyright 2007 Matt Broadstone <mbroadst@gmail.com>
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*
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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_CORONA_H
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#define PLASMA_CORONA_H
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#include <QtGui/QGraphicsScene>
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#include <plasma/applet.h>
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#include <plasma/plasma.h>
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#include <plasma/plasma_export.h>
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class QGraphicsGridLayout;
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namespace Plasma
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{
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class Containment;
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class CoronaPrivate;
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/**
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* @class Corona plasma/corona.h <Plasma/Corona>
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*
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* @short A QGraphicsScene for Plasma::Applets
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*/
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class PLASMA_EXPORT Corona : public QGraphicsScene
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{
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Q_OBJECT
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//typedef QHash<QString, QList<Plasma::Applet*> > layouts;
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public:
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explicit Corona(QObject * parent = 0);
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~Corona();
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/**
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* Sets the mimetype of Drag/Drop items. Default is
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* text/x-plasmoidservicename
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*/
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void setAppletMimeType(const QString &mimetype);
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/**
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* The current mime type of Drag/Drop items.
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*/
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QString appletMimeType();
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/**
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* @return all containments on this Corona
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*/
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QList<Containment*> containments() const;
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/**
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* Clear the Corona from all applets.
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*/
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void clearContainments();
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/**
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* Returns the config file used to store the configuration for this Corona
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*/
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KSharedConfig::Ptr config() const;
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/**
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* Adds a Containment to the Corona
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*
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* @param name the plugin name for the containment, as given by
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* KPluginInfo::pluginName(). If an empty string is passed in, the defalt
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* containment plugin will be used (usually DesktopContainment). If the
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* string literal "null" is passed in, then no plugin will be loaded and
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* a simple Containment object will be created instead.
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* @param args argument list to pass to the containment
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*
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* @return a pointer to the containment on success, or 0 on failure
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*/
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Containment *addContainment(const QString &name, const QVariantList &args = QVariantList());
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/**
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* Returns the Containment, if any, for a given physical screen
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*
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* @param screen number of the physical screen to locate
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*/
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Containment *containmentForScreen(int screen) const;
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/**
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* Adds a widget in the topleft quadrant in the scene. Widgets in the topleft quadrant are
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* normally never shown unless you specifically aim a view at it, which makes it ideal for
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* toplevel views etc.
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* @param widget the widget to add.
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*/
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void addOffscreenWidget(QGraphicsWidget *widget);
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/**
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* Removes a widget from the topleft quadrant in the scene.
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* @param widget the widget to remove.
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*/
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void removeOffscreenWidget(QGraphicsWidget *widget);
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/**
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* Returns the number of screens available to plasma.
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* Subclasses should override this method as the default
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* implementation returns a meaningless value.
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*/
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virtual int numScreens() const;
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/**
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* Returns the geometry of a given screen.
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* Valid screen ids are 0 to numScreen()-1, or -1 for the full desktop geometry.
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* Subclasses should override this method as the default
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* implementation returns a meaningless value.
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*/
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virtual QRect screenGeometry(int id) const;
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/**
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* Returns the available region for a given screen.
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* The available region excludes panels and similar windows.
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* Valid screen ids are 0 to numScreens()-1.
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* By default this method returns a rectangular region
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* equal to screenGeometry(id); subclasses that need another
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* behavior should override this method.
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*/
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virtual QRegion availableScreenRegion(int id) const;
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/**
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* Reccomended position for a popup window like a menu or a tooltip
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* given its size
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* @param s size of the popup
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* @returns reccomended position
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*/
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QPoint popupPosition(const QGraphicsItem *item, const QSize &s);
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public Q_SLOTS:
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/**
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* Initializes the layout from a config file. This will first clear any existing
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* Containments, load a layout from the requested configuration file, request the
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* default layout if needed and update immutability.
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*
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* @param config the name of the config file to load from,
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* or the default config file if QString()
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*/
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void initializeLayout(const QString &config = QString());
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/**
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* Load applet layout from a config file. The results will be added to the
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* current set of Containments.
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*
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* @param config the name of the config file to load from,
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* or the default config file if QString()
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*/
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void loadLayout(const QString &config = QString());
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/**
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* Save applets layout to file
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* @arg config the file to save to, or the default config file if QString()
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*/
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void saveLayout(const QString &config = QString()) const;
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/**
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* @return The type of immutability of this Corona
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*/
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ImmutabilityType immutability() const;
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/**
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* Sets the immutability type for this Corona (not immutable,
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* user immutable or system immutable)
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* @arg immutable the new immutability type of this applet
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*/
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void setImmutability(const ImmutabilityType immutable);
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/**
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* Schedules a flush-to-disk synchronization of the configuration state
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* at the next convenient moment.
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*/
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void requestConfigSync();
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Q_SIGNALS:
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/**
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* This signal indicates a new containment has been added to
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* the Corona
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*/
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void containmentAdded(Plasma::Containment *containment);
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/**
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* This signal indicates that a containment has been newly
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* associated (or dissociated) with a physical screen.
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*
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* @param wasScreen the screen it was associated with
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* @param isScreen the screen it is now associated with
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* @param containment the containment switching screens
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*/
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void screenOwnerChanged(int wasScreen, int isScreen, Plasma::Containment *containment);
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/**
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* This signal indicates that an application launch, window
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* creation or window focus event was triggered. This is used, for instance,
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* to ensure that the Dashboard view in Plasma hides when such an event is
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* triggered by an item it is displaying.
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*/
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void releaseVisualFocus();
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/**
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* This signal indicates that the configuration file was flushed to disc.
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*/
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void configSynced();
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protected:
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/**
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* Loads the default (system wide) layout for this user
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**/
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virtual void loadDefaultLayout();
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/**
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* Loads a containment with delayed initialization, primarily useful
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* for implementations of loadDefaultLayout. The caller is responsible
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* for all initializating, saving and notification of a new containment.
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*
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* @param name the plugin name for the containment, as given by
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* KPluginInfo::pluginName(). If an empty string is passed in, the defalt
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* containment plugin will be used (usually DesktopContainment). If the
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* string literal "null" is passed in, then no plugin will be loaded and
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* a simple Containment object will be created instead.
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* @param args argument list to pass to the containment
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*
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* @return a pointer to the containment on success, or 0 on failure
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**/
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Containment *addContainmentDelayed(const QString &name,
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const QVariantList &args = QVariantList());
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//Reimplemented from QGraphicsScene
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void dragEnterEvent(QGraphicsSceneDragDropEvent *event);
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void dragLeaveEvent(QGraphicsSceneDragDropEvent *event);
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void dragMoveEvent(QGraphicsSceneDragDropEvent *event);
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private:
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CoronaPrivate *const d;
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Q_PRIVATE_SLOT(d, void containmentDestroyed(QObject*))
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Q_PRIVATE_SLOT(d, void offscreenWidgetDestroyed(QObject *))
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Q_PRIVATE_SLOT(d, void syncConfig())
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friend class CoronaPrivate;
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};
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} // namespace Plasma
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#endif
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