barrier/platform/CXWindowsScreenSaver.h

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#ifndef CXWINDOWSSCREENSAVER_H
#define CXWINDOWSSCREENSAVER_H
#include "IScreenSaver.h"
#if defined(X_DISPLAY_MISSING)
# error X11 is required to build synergy
#else
# include <X11/Xlib.h>
#endif
class CXWindowsScreenSaver : public IScreenSaver {
public:
// note -- the caller must ensure that Display* passed to c'tor isn't
// being used in another call to Xlib when calling any method on this
// object (including during the c'tor and d'tor) except processEvent().
CXWindowsScreenSaver(Display*);
virtual ~CXWindowsScreenSaver();
// process X event. returns true if the event was handled.
bool processEvent(XEvent*);
// tells this object to send a ClientMessage to the given window
// when the screen saver activates or deactivates. only one
// window can be notified. the message type is the "SCREENSAVER"
// atom, the format is 32, and the data.l[0] member is non-zero
// if activated, zero if deactivated. pass in None to disable
// notification;
void setNotify(Window);
// IScreenSaver overrides
virtual void enable();
virtual void disable();
virtual void activate();
virtual void deactivate();
virtual bool isActive() const;
private:
// send a notification
void sendNotify(bool activated);
// set xscreensaver's activation state flag. sends notification
// if the state has changed.
void setXScreenSaver(bool activated);
// find the running xscreensaver's window
void updateXScreenSaver();
// send a command to xscreensaver
void sendXScreenSaverCommand(Atom, long = 0, long = 0);
private:
// the X display
Display* m_display;
// old event mask on root window
long m_rootEventMask;
// window to notify on screen saver activation/deactivation
Window m_notify;
// xscreensaver's window
Window m_xscreensaver;
// xscreensaver activation state
bool m_xscreensaverActive;
// dummy window to receive xscreensaver repsonses
Window m_xscreensaverSink;
// atoms used to communicate with xscreensaver's window
Atom m_atomScreenSaver;
Atom m_atomScreenSaverVersion;
Atom m_atomScreenSaverActivate;
Atom m_atomScreenSaverDeactivate;
// built-in screen saver settings
int m_timeout;
int m_interval;
int m_preferBlanking;
int m_allowExposures;
};
#endif