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125 lines
3.0 KiB
125 lines
3.0 KiB
15 years ago
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/* vi: ts=8 sts=4 sw=4
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*
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* This file is part of the KDE project, module kdesktop.
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* Copyright (C) 1999 Geert Jansen <g.t.jansen@stud.tue.nl>
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*
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* You can Freely distribute this program under the GNU General Public
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* License. See the file "COPYING" for the exact licensing terms.
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*/
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#ifndef __PixmapServer_h_Included__
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#define __PixmapServer_h_Included__
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#include <qwindowdefs.h>
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#include <qwidget.h>
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#include <qmap.h>
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#include <X11/X.h>
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#include <X11/Xlib.h>
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/**
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* Used internally by KPixmapServer.
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*/
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struct KPixmapInode
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{
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Qt::HANDLE handle;
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Atom selection;
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};
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struct KPixmapData
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{
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QPixmap *pixmap;
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int usecount;
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int refcount;
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};
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struct KSelectionInode
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{
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Qt::HANDLE handle;
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QString name;
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};
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/**
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* KPixmapServer: Share pixmaps between X clients with deletion and
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* multi-server capabilities.
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* The sharing is implemented using X11 Selections.
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*
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* @author Geert Jansen <g.t.jansen@stud.tue.nl>
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*/
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class KPixmapServer: public QWidget
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{
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Q_OBJECT
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public:
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KPixmapServer();
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~KPixmapServer();
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/**
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* Adds a pixmap to this server. This will make it available to all
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* other X clients on the current display.
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*
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* You must never delete a pixmap that you add()'ed. The pixmap is
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* deleted when you call remove() and after all clients have stopped
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* using it.
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*
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* You can add the same pixmap under multiple names.
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*
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* @param name An X11-wide unique identifier for the pixmap.
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* @param pm A pointer to the pixmap.
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* @param overwrite Should an pixmap with the same name be overwritten?
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*/
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void add(QString name, QPixmap *pm, bool overwrite=true);
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/**
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* Remove a pixmap from the server. This will delete the pixmap after
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* all clients have stopped using it.
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*
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* @param name The name of the shared pixmap.
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*/
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void remove(QString name);
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/**
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* List all pixmaps currently served by this server.
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*
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* @return A QStringList containing all the shared pixmaps.
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*/
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QStringList list();
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/**
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* Re-set ownership of the selection providing the shared pixmap.
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*
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* @param name The name of the shared pixmap.
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*/
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void setOwner(QString name);
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signals:
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/**
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* This signal is emitted when the selection providing the named pixmap
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* is disowned. This means that said pixmap won't be served anymore by
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* this server, though it can be served by another. You can re-aqcuire
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* the selection by calling setOwner().
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*/
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void selectionCleared(QString name);
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protected:
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bool x11Event(XEvent *);
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private:
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Atom pixmap;
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QMap<QString,KPixmapInode> m_Names;
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QMap<Atom,KSelectionInode> m_Selections;
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QMap<HANDLE,KPixmapData> m_Data;
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QMap<Atom,HANDLE> m_Active;
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typedef QMap<QString,KPixmapInode>::Iterator NameIterator;
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typedef QMap<Atom,KSelectionInode>::Iterator SelectionIterator;
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typedef QMap<HANDLE,KPixmapData>::Iterator DataIterator;
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typedef QMap<Atom,HANDLE>::Iterator AtomIterator;
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};
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#endif // __PixmapServer_h_Included__
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