333b91acfb
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=872751
214 lines
6.3 KiB
C++
214 lines
6.3 KiB
C++
/*
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* Copyright 2007 Aaron Seigo <aseigo@kde.org>
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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_VIEW_H
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#define PLASMA_VIEW_H
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#include <QtGui/QApplication>
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#include <QtGui/QGraphicsView>
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#include <KDE/KConfigGroup>
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#include <plasma/plasma_export.h>
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namespace Plasma
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{
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class Containment;
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class Corona;
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class ViewPrivate;
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/**
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* @class View plasma/view.h <Plasma/View>
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*
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* @short A QGraphicsView for a single Containment
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*
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* Each View is associated with a Plasma::Containment and tracks geometry
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* changes, maps to the current desktop (if any) among other helpful
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* utilities. It isn't stricly required to use a Plasma::View with Plasma
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* enabled applications, but it can make some things easier.
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*/
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class PLASMA_EXPORT View : public QGraphicsView
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{
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Q_OBJECT
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public:
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/**
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* Constructs a view for a given contanment. An Id is automatically
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* assigned to the View.
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*
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* @arg containment the containment to center the view on
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* @arg parent the parent object for this view
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*/
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explicit View(Containment *containment, QWidget *parent = 0);
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/**
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* Constructs a view for a given contanment.
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*
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* @arg containment the containment to center the view on
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* @arg viewId the id to assign to this view
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* @arg parent the parent object for this view
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*/
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View(Containment *containment, int viewId, QWidget *parent = 0);
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~View();
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/**
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* Sets whether or not to draw the containment wallpaper when painting
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* on this item
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*/
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void setWallpaperEnabled(bool draw);
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/**
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* @return whether or not containments should draw wallpaper
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*/
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bool isWallpaperEnabled() const;
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/**
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* Sets which screen this view is associated with, if any.
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* This will also set the containment if a valid screen is specified
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*
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* @arg screen the xinerama screen number; -1 for no screen
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*/
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void setScreen(int screen);
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/**
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* Returns the screen this view is associated with
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*
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* @return the xinerama screen number, or -1 for none
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*/
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int screen() const;
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/**
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* Sets which virtual desktop this view is asociated with, if any.
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*
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* @arg desktop a valid desktop number, -1 for all desktops, less than -1 for none
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*/
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void setDesktop(int desktop);
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/**
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* The virtual desktop this view is associated with
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*
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* @return the desktop number, -1 for all desktops and less than -1 for none
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*/
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int desktop() const;
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/**
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* The virtual desktop this view is actually being viewed on
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*
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* @return the desktop number (always valid, never < 0)
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*/
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int effectiveDesktop() const;
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/**
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* @return the containment associated with this view, or 0 if none is
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*/
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Containment *containment() const;
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/**
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* Swaps one containment with another.
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*
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* @param existing the existing containment to swap out
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* @param name the plugin name for the new containment.
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* @param args argument list to pass to the containment
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*/
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Containment *swapContainment(Plasma::Containment *existing,
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const QString &name,
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const QVariantList &args = QVariantList());
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/**
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* Swap the containment for this view, which will also cause the view
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* to track the geometry of the containment.
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*
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* @param name the plugin name for the new containment.
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* @param args argument list to pass to the containment
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*/
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Containment *swapContainment(const QString &name,
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const QVariantList &args = QVariantList());
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/**
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* Set whether or not the view should adjust its size when the associated
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* containment does.
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* @arg trackChanges true to synchronize the view's size with the containment's
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* (this is the default behaviour), false to ignore containment size changes
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*/
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void setTrackContainmentChanges(bool trackChanges);
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/**
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* @return whether or not the view tracks changes to the containment
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*/
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bool trackContainmentChanges();
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/**
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* @param pos the position in screen coordinates.
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* @return the Plasma::View that is at position pos.
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*/
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static View * topLevelViewAt(const QPoint & pos);
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/**
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* @return the id of the View set in the constructor
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*/
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int id() const;
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Q_SIGNALS:
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/**
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* This signal is emitted whenever the containment being viewed has
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* changed its geometry, but before the View has shifted the viewd scene rect
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* to the new geometry. This is useful for Views which want to keep
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* their rect() in sync with the containment'sa
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*/
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void sceneRectAboutToChange();
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/**
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* This signal is emitted whenever the containment being viewed has
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* changed its geometry, and after the View has shifted the viewd scene rect
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* to the new geometry. This is useful for Views which want to keep
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* their rect() in sync with the containment's.
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*/
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void sceneRectChanged();
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public Q_SLOTS:
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/**
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* Sets the containment for this view, which will also cause the view
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* to track the geometry of the containment.
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*
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* @arg containment the containment to center the view on
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*/
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virtual void setContainment(Plasma::Containment *containment);
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protected:
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/**
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* @return a KConfigGroup in the application's config file unique to the view
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*/
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KConfigGroup config() const;
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private:
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ViewPrivate * const d;
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Q_PRIVATE_SLOT(d, void updateSceneRect())
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Q_PRIVATE_SLOT(d, void containmentDestroyed())
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friend class ViewPrivate;
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};
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} // namespace Plasma
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#endif
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