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