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