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 #include <vector>
  10
  11 namespace otk {
  12
  13 class ScreenInfo;
  14 class GCCache;
  15
  16 //! Manages a single X11 display.
  17 /*!
  18   This class is static, and cannot be instantiated.
  19   Use the initialize() method to open the display and ready it for use.
  20   Use the destroy() method to close it and clean up the class' data.
  21 */
  22 class Display
  23 {
  24 public:
  25   //! The X display
  26   static ::Display *display;
  27
  28   //! A List of ScreenInfo instances
  29   typedef std::vector<ScreenInfo> ScreenInfoList;
  30
  31 private:
  32   //! Does the display have the XKB extension?
  33   static bool _xkb;
  34   //! Base for events for the XKB extension
  35   static int  _xkb_event_basep;
  36
  37   //! Does the display have the Shape extension?
  38   static bool _shape;
  39   //! Base for events for the Shape extension
  40   static int  _shape_event_basep;
  41
  42   //! Does the display have the Xinerama extension?
  43   static bool _xinerama;
  44   //! Base for events for the Xinerama extension
  45   static int  _xinerama_event_basep;
  46
  47   //! A list of all possible combinations of keyboard lock masks
  48   static unsigned int _mask_list[8];
  49
  50   //! The value of the mask for the NumLock modifier
  51   static unsigned int _numLockMask;
  52
  53   //! The value of the mask for the ScrollLock modifier
  54   static unsigned int _scrollLockMask;
  55
  56   //! The number of requested grabs on the display
  57   static int _grab_count;
  58
  59   //! A list of information for all screens on the display
  60   static ScreenInfoList _screenInfoList;
  61
  62   //! A cache for re-using GCs, used by the drawing objects
  63   /*!
  64     @see Pen
  65     @see Font
  66     @see Image
  67     @see ImageControl
  68     @see Texture
  69   */
  70   static GCCache *_gccache;
  71
  72   //! Handles X errors on the display
  73   /*!
  74     Displays the error if compiled for debugging.
  75   */
  76   static int xerrorHandler(::Display *d, XErrorEvent *e);
  77
  78   //! Prevents instantiation of the class
  79   Display();
  80
  81 public:
  82   //! Initializes the class, opens the X display
  83   /*!
  84     @see Display::display
  85     @param name The name of the X display to open. If it is null, the DISPLAY
  86                 environment variable is used instead.
  87   */
  88   static void initialize(char *name);
  89   //! Destroys the class, closes the X display
  90   static void destroy();
  91
  92   //! Returns the GC cache for the application
  93   inline static GCCache *gcCache() { return _gccache; }
  94
  95   //! Gets information on a specific screen
  96   /*!
  97     Returns a ScreenInfo class, which contains information for a screen on the
  98     display.
  99     @param snum The screen number of the screen to retrieve info on
 100     @return Info on the requested screen, in a ScreenInfo class
 101   */
 102   static const ScreenInfo* screenInfo(int snum);
 103
 104   //! Find a ScreenInfo based on a root window
 105   static const ScreenInfo* findScreen(Window root);
 106
 107   //! Returns if the display has the xkb extension available
 108   inline static bool xkb() { return _xkb; }
 109   //! Returns the xkb extension's event base
 110   inline static int xkbEventBase() { return _xkb_event_basep; }
 111
 112   //! Returns if the display has the shape extension available
 113   inline static bool shape() { return _shape; }
 114   //! Returns the shape extension's event base
 115   inline static int shapeEventBase() { return _shape_event_basep; }
 116   //! Returns if the display has the xinerama extension available
 117   inline static bool xinerama() { return _xinerama; }
 118
 119   inline static unsigned int numLockMask() { return _numLockMask; }
 120   inline static unsigned int scrollLockMask() { return _scrollLockMask; }
 121
 122   //! Grabs the display
 123   static void grab();
 124
 125   //! Ungrabs the display
 126   static void ungrab();
 127
 128
 129
 130   /* TEMPORARY */
 131   static 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);
 136   static void ungrabButton(unsigned int button, unsigned int modifiers,
 137                     Window grab_window);
 138   static void grabKey(unsigned int keycode, unsigned int modifiers,
 139                   Window grab_window, bool owner_events,
 140                   int pointer_mode, int keyboard_mode, bool allow_scroll_lock);
 141   static void ungrabKey(unsigned int keycode, unsigned int modifiers,
 142                         Window grab_window);
 143 };
 144
 145 }
 146
 147 #endif // __display_hh