74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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#ifndef CXWINDOWSSCREEN_H
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#define CXWINDOWSSCREEN_H
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#include "CMutex.h"
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#include "BasicTypes.h"
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#include <X11/Xlib.h>
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class CThread;
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class CXWindowsScreen {
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public:
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CXWindowsScreen();
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virtual ~CXWindowsScreen();
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protected:
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class CDisplayLock {
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public:
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CDisplayLock(const CXWindowsScreen*);
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~CDisplayLock();
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operator Display*() const;
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private:
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const CMutex* m_mutex;
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Display* m_display;
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};
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friend class CDisplayLock;
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// open the X display. calls onOpenDisplay() after opening the display,
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// getting the screen, its size, and root window. then it starts the
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// event thread.
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void openDisplay();
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// destroy the window and close the display. calls onCloseDisplay()
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// after the event thread has been shut down but before the display
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// is closed.
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void closeDisplay();
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// get the opened screen, its size, its root window. to get the
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// display create a CDisplayLock object passing this. while the
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// object exists no other threads may access the display. do not
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// save the Display* beyond the lifetime of the CDisplayLock.
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int getScreen() const;
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void getScreenSize(SInt32* w, SInt32* h) const;
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Window getRoot() const;
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// create a cursor that is transparent everywhere
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Cursor createBlankCursor() const;
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// wait for and get the next X event. cancellable.
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void getEvent(XEvent*) const;
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// called by openDisplay() to allow subclasses to prepare the display
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virtual void onOpenDisplay() = 0;
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// called by closeDisplay() to
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virtual void onCloseDisplay() = 0;
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// override to process X events
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virtual void eventThread(void*) = 0;
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private:
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CThread* m_eventThread;
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Display* m_display;
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int m_screen;
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Window m_root;
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SInt32 m_w, m_h;
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// X is not thread safe
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CMutex m_mutex;
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};
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#endif
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