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

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   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 BGCCache;
  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 OBDisplay
  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 Shape extention?
  33   static bool _shape;
  34   //! Base for events for the Shape extention
  35   static int  _shape_event_basep;
  36
  37   //! Does the display have the Xinerama extention?
  38   static bool _xinerama;
  39   //! Base for events for the Xinerama extention
  40   static int  _xinerama_event_basep;
  41
  42   //! A list of all possible combinations of keyboard lock masks
  43   static unsigned int _mask_list[8];
  44
  45   //! The value of the mask for the NumLock modifier
  46   static unsigned int _numLockMask;
  47
  48   //! The value of the mask for the ScrollLock modifier
  49   static unsigned int _scrollLockMask;
  50
  51   //! The number of requested grabs on the display
  52   static int _grab_count;
  53
  54   //! A list of information for all screens on the display
  55   static ScreenInfoList _screenInfoList;
  56
  57   //! A cache for re-using GCs, used by the drawing objects
  58   /*!
  59     @see BPen
  60     @see BFont
  61     @see BImage
  62     @see BImageControl
  63     @see BTexture
  64   */
  65   static BGCCache *_gccache;
  66
  67   //! Handles X errors on the display
  68   /*!
  69     Displays the error if compiled for debugging.
  70   */
  71   static int xerrorHandler(Display *d, XErrorEvent *e);
  72
  73   //! Prevents instantiation of the class
  74   OBDisplay();
  75
  76 public:
  77   //! Initializes the class, opens the X display
  78   /*!
  79     @see OBDisplay::display
  80     @param name The name of the X display to open. If it is null, the DISPLAY
  81                 environment variable is used instead.
  82   */
  83   static void initialize(char *name);
  84   //! Destroys the class, closes the X display
  85   static void destroy();
  86
  87   //! Returns the GC cache for the application
  88   inline static BGCCache *gcCache() { 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   static const ScreenInfo* screenInfo(int snum);
  98
  99   static const ScreenInfo* findScreen(Window root);
 100
 101   //! Returns if the display has the shape extention available
 102   inline static bool shape() { return _shape; }
 103   //! Returns the shape extension's event base
 104   inline static int shapeEventBase() { return _shape_event_basep; }
 105   //! Returns if the display has the xinerama extention available
 106   inline static bool xinerama() { return _xinerama; }
 107
 108   inline static unsigned int numLockMask() { return _numLockMask; }
 109   inline static unsigned int scrollLockMask() { return _scrollLockMask; }
 110
 111   //! Grabs the display
 112   static void grab();
 113
 114   //! Ungrabs the display
 115   static void ungrab();
 116
 117
 118
 119   /* TEMPORARY */
 120   static void grabButton(unsigned int button, unsigned int modifiers,
 121                   Window grab_window, bool owner_events,
 122                   unsigned int event_mask, int pointer_mode,
 123                   int keyboard_mode, Window confine_to, Cursor cursor,
 124                   bool allow_scroll_lock);
 125   static void ungrabButton(unsigned int button, unsigned int modifiers,
 126                     Window grab_window);
 127   static void grabKey(unsigned int keycode, unsigned int modifiers,
 128                   Window grab_window, bool owner_events,
 129                   int pointer_mode, int keyboard_mode, bool allow_scroll_lock);
 130   static void ungrabKey(unsigned int keycode, unsigned int modifiers,
 131                         Window grab_window);
 132 };
 133
 134 }
 135
 136 #endif // __display_hh