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 /*!
  23   This class is static, and cannot be instantiated.
  24   Use the initialize() method to open the display and ready it for use.
  25   Use the destroy() method to close it and clean up the class' data.
  26 */
  27 class Display
  28 {
  29 public:
  30   //! A List of ScreenInfo instances
  31   typedef std::vector<ScreenInfo> ScreenInfoList;
  32
  33 private:
  34   //! The X display
  35   ::Display *_display;
  36
  37   //! Does the display have the XKB extension?
  38   bool _xkb;
  39   //! Base for events for the XKB extension
  40   int  _xkb_event_basep;
  41
  42   //! Does the display have the Shape extension?
  43   bool _shape;
  44   //! Base for events for the Shape extension
  45   int  _shape_event_basep;
  46
  47   //! Does the display have the Xinerama extension?
  48   bool _xinerama;
  49   //! Base for events for the Xinerama extension
  50   int  _xinerama_event_basep;
  51
  52   //! A list of all possible combinations of keyboard lock masks
  53   unsigned int _mask_list[8];
  54
  55   //! The value of the mask for the NumLock modifier
  56   unsigned int _num_lock_mask;
  57
  58   //! The value of the mask for the ScrollLock modifier
  59   unsigned int _scroll_lock_mask;
  60
  61   //! The number of requested grabs on the display
  62   int _grab_count;
  63
  64   //! A list of information for all screens on the display
  65   ScreenInfoList _screenInfoList;
  66
  67   //! A cache for re-using GCs, used by the drawing objects
  68   /*!
  69     @see Pen
  70     @see Font
  71     @see Image
  72     @see ImageControl
  73     @see Texture
  74   */
  75   GCCache *_gccache;
  76
  77   // Handles X errors on the display
  78   /*
  79     Displays the error if compiled for debugging.
  80   */
  81   //int xerrorHandler(::Display *d, XErrorEvent *e);
  82
  83 public:
  84   //! Initializes the class, opens the X display
  85   /*!
  86     The DISPLAY environment variable is used to choose the display.
  87     @see Display::display
  88   */
  89   Display();
  90   //! Destroys the class, closes the X display
  91   ~Display();
  92
  93   //! Returns the GC cache for the application
  94   inline GCCache *gcCache() const { return _gccache; }
  95
  96   //! Gets information on a specific screen
  97   /*!
  98     Returns a ScreenInfo class, which contains information for a screen on the
  99     display.
 100     @param snum The screen number of the screen to retrieve info on
 101     @return Info on the requested screen, in a ScreenInfo class
 102   */
 103   const ScreenInfo* screenInfo(int snum);
 104
 105   //! Find a ScreenInfo based on a root window
 106   const ScreenInfo* findScreen(Window root);
 107
 108   //! Returns if the display has the xkb extension available
 109   inline bool xkb() const { return _xkb; }
 110   //! Returns the xkb extension's event base
 111   inline int xkbEventBase() const { return _xkb_event_basep; }
 112
 113   //! Returns if the display has the shape extension available
 114   inline bool shape() const { return _shape; }
 115   //! Returns the shape extension's event base
 116   inline int shapeEventBase() const { return _shape_event_basep; }
 117   //! Returns if the display has the xinerama extension available
 118   inline bool xinerama() const { return _xinerama; }
 119
 120   inline unsigned int numLockMask() const { return _num_lock_mask; }
 121   inline unsigned int scrollLockMask() const { return _scroll_lock_mask; }
 122
 123   inline ::Display* operator*() const { return _display; }
 124
 125   //! Grabs the display
 126   void grab();
 127
 128   //! Ungrabs the display
 129   void ungrab();
 130
 131
 132
 133   /* TEMPORARY */
 134   void grabButton(unsigned int button, unsigned int modifiers,
 135                   Window grab_window, bool owner_events,
 136                   unsigned int event_mask, int pointer_mode,
 137                   int keyboard_mode, Window confine_to, Cursor cursor,
 138                   bool allow_scroll_lock) const;
 139   void ungrabButton(unsigned int button, unsigned int modifiers,
 140                     Window grab_window) const;
 141   void grabKey(unsigned int keycode, unsigned int modifiers,
 142                Window grab_window, bool owner_events,
 143                int pointer_mode, int keyboard_mode,
 144                bool allow_scroll_lock) const;
 145   void ungrabKey(unsigned int keycode, unsigned int modifiers,
 146                  Window grab_window) const;
 147 };
 148
 149 }
 150
 151 #endif // __display_hh