Dogcows Code - chaz/openbox/blob - otk/display.hh

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2 #ifndef   __display_hh
   3 #define   __display_hh
   4
   5 extern "C" {
   6 #include <X11/Xlib.h>
   7 }
   8
   9 namespace otk {
  10
  11 class ScreenInfo;
  12 class GCCache;
  13 class RenderControl;
  14
  15 class Display;
  16
  17 //! The display instance for the library
  18 extern Display *display;
  19
  20 //! Manages a single X11 display.
  21 class Display
  22 {
  23 private:
  24   //! The X display
  25   ::Display *_display;
  26
  27   //! Does the display have the XKB extension?
  28   bool _xkb;
  29   //! Base for events for the XKB extension
  30   int  _xkb_event_basep;
  31
  32   //! Does the display have the Shape extension?
  33   bool _shape;
  34   //! Base for events for the Shape extension
  35   int  _shape_event_basep;
  36
  37   //! Does the display have the Xinerama extension?
  38   bool _xinerama;
  39   //! Base for events for the Xinerama extension
  40   int  _xinerama_event_basep;
  41
  42   //! A list of all possible combinations of keyboard lock masks
  43   unsigned int _mask_list[8];
  44
  45   //! The value of the mask for the NumLock modifier
  46   unsigned int _num_lock_mask;
  47
  48   //! The value of the mask for the ScrollLock modifier
  49   unsigned int _scroll_lock_mask;
  50
  51   //! The number of requested grabs on the display
  52   int _grab_count;
  53
  54   //! A list of information for all screens on the display
  55   ScreenInfo** _screeninfo_list;
  56
  57   //! A list of RenderControl objects, which are used for all graphics on a
  58   //! screen
  59   RenderControl** _rendercontrol_list;
  60
  61   //! A cache for re-using GCs, used by the drawing objects
  62   /*!
  63     @see Pen
  64     @see Font
  65     @see Image
  66     @see ImageControl
  67     @see Texture
  68   */
  69   GCCache *_gccache;
  70
  71   // Handles X errors on the display
  72   /*
  73     Displays the error if compiled for debugging.
  74   */
  75   //int xerrorHandler(::Display *d, XErrorEvent *e);
  76
  77 public:
  78   //! Initializes the class, opens the X display
  79   /*!
  80     The DISPLAY environment variable is used to choose the display.
  81     @see Display::display
  82   */
  83   Display();
  84   //! Destroys the class, closes the X display
  85   ~Display();
  86
  87   //! Returns the GC cache for the application
  88   inline GCCache *gcCache() const { return _gccache; }
  89
  90   //! Gets information on a specific screen
  91   /*!
  92     Returns a ScreenInfo class, which contains information for a screen on the
  93     display.
  94     @param snum The screen number of the screen to retrieve info on
  95     @return Info on the requested screen, in a ScreenInfo class
  96   */
  97   const ScreenInfo* screenInfo(int snum) const;
  98
  99   //! Find a ScreenInfo based on a root window
 100   const ScreenInfo* findScreen(Window root) const;
 101
 102   //! Gets the RenderControl for a screen
 103   const RenderControl *renderControl(int snum) const;
 104
 105   //! Returns if the display has the xkb extension available
 106   inline bool xkb() const { return _xkb; }
 107   //! Returns the xkb extension's event base
 108   inline int xkbEventBase() const { return _xkb_event_basep; }
 109
 110   //! Returns if the display has the shape extension available
 111   inline bool shape() const { return _shape; }
 112   //! Returns the shape extension's event base
 113   inline int shapeEventBase() const { return _shape_event_basep; }
 114   //! Returns if the display has the xinerama extension available
 115   inline bool xinerama() const { return _xinerama; }
 116
 117   inline unsigned int numLockMask() const { return _num_lock_mask; }
 118   inline unsigned int scrollLockMask() const { return _scroll_lock_mask; }
 119
 120   inline ::Display* operator*() const { return _display; }
 121
 122   //! Grabs the display
 123   void grab();
 124
 125   //! Ungrabs the display
 126   void ungrab();
 127
 128
 129
 130   /* TEMPORARY */
 131   void grabButton(unsigned int button, unsigned int modifiers,
 132                   Window grab_window, bool owner_events,
 133                   unsigned int event_mask, int pointer_mode,
 134                   int keyboard_mode, Window confine_to, Cursor cursor,
 135                   bool allow_scroll_lock) const;
 136   void ungrabButton(unsigned int button, unsigned int modifiers,
 137                     Window grab_window) const;
 138   void grabKey(unsigned int keycode, unsigned int modifiers,
 139                Window grab_window, bool owner_events,
 140                int pointer_mode, int keyboard_mode,
 141                bool allow_scroll_lock) const;
 142   void ungrabKey(unsigned int keycode, unsigned int modifiers,
 143                  Window grab_window) const;
 144 };
 145
 146 }
 147
 148 #endif // __display_hh