plasma-framework/view.h
Aaron J. Seigo 725c0c3137 when the contianment goes away, zero our pointer to it
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=871483
2008-10-15 00:26:42 +00:00

203 lines
5.8 KiB
C++

/*
* Copyright 2007 Aaron Seigo <aseigo@kde.org>
*
* 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_VIEW_H
#define PLASMA_VIEW_H
#include <QtGui/QApplication>
#include <QtGui/QGraphicsView>
#include <KDE/KConfigGroup>
#include <plasma/plasma_export.h>
namespace Plasma
{
class Containment;
class Corona;
class ViewPrivate;
/**
* @class View plasma/view.h <Plasma/View>
*
* @short A QGraphicsView for a single Containment
*
* Each View is associated with a Plasma::Containment and tracks geometry
* changes, maps to the current desktop (if any) among other helpful
* utilities. It isn't stricly required to use a Plasma::View with Plasma
* enabled applications, but it can make some things easier.
*/
class PLASMA_EXPORT View : public QGraphicsView
{
Q_OBJECT
public:
/**
* Constructs a view for a given contanment. An Id is automatically
* assigned to the View.
*
* @arg containment the containment to center the view on
* @arg parent the parent object for this view
*/
explicit View(Containment *containment, QWidget *parent = 0);
/**
* Constructs a view for a given contanment.
*
* @arg containment the containment to center the view on
* @arg viewId the id to assign to this view
* @arg parent the parent object for this view
*/
View(Containment *containment, int viewId, QWidget *parent = 0);
~View();
/**
* Sets whether or not to draw the containment wallpaper when painting
* on this item
*/
void setWallpaperEnabled(bool draw);
/**
* @return whether or not containments should draw wallpaper
*/
bool isWallpaperEnabled() const;
/**
* Sets which screen this view is associated with, if any.
* This will also set the containment if a valid screen is specified
*
* @arg screen the xinerama screen number; -1 for no screen
*/
void setScreen(int screen);
/**
* Returns the screen this view is associated with
*
* @return the xinerama screen number, or -1 for none
*/
int screen() const;
/**
* Sets which virtual desktop this view is asociated with, if any.
*
* @arg desktop a valid desktop number, -1 for all desktops, less than -1 for none
*/
void setDesktop(int desktop);
/**
* The virtual desktop this view is associated with
*
* @return the desktop number, -1 for all desktops and less than -1 for none
*/
int desktop() const;
/**
* The virtual desktop this view is actually being viewed on
*
* @return the desktop number (always valid, never < 0)
*/
int effectiveDesktop() const;
/**
* @return the containment associated with this view, or 0 if none is
*/
Containment *containment() const;
/**
* Swap the containment for this view, which will also cause the view
* to track the geometry of the containment.
*
* @param name the plugin name for the new containment.
* @param args argument list to pass to the containment
*/
Containment *swapContainment(const QString &name,
const QVariantList &args = QVariantList());
/**
* Set whether or not the view should adjust its size when the associated
* containment does.
* @arg trackChanges true to synchronize the view's size with the containment's
* (this is the default behaviour), false to ignore containment size changes
*/
void setTrackContainmentChanges(bool trackChanges);
/**
* @return whether or not the view tracks changes to the containment
*/
bool trackContainmentChanges();
/**
* @param pos the position in screen coordinates.
* @return the Plasma::View that is at position pos.
*/
static View * topLevelViewAt(const QPoint & pos);
/**
* @return the id of the View set in the constructor
*/
int id() const;
Q_SIGNALS:
/**
* This signal is emitted whenever the containment being viewed has
* changed its geometry, but before the View has shifted the viewd scene rect
* to the new geometry. This is useful for Views which want to keep
* their rect() in sync with the containment'sa
*/
void sceneRectAboutToChange();
/**
* This signal is emitted whenever the containment being viewed has
* changed its geometry, and after the View has shifted the viewd scene rect
* to the new geometry. This is useful for Views which want to keep
* their rect() in sync with the containment's.
*/
void sceneRectChanged();
public Q_SLOTS:
/**
* Sets the containment for this view, which will also cause the view
* to track the geometry of the containment.
*
* @arg containment the containment to center the view on
*/
virtual void setContainment(Plasma::Containment *containment);
protected:
/**
* @return a KConfigGroup in the application's config file unique to the view
*/
KConfigGroup config() const;
private:
ViewPrivate * const d;
Q_PRIVATE_SLOT(d, void updateSceneRect())
Q_PRIVATE_SLOT(d, void containmentDestroyed())
friend class ViewPrivate;
};
} // namespace Plasma
#endif