class TVirtualX: public TNamed, public TAttLine, public TAttFill, public TAttText, public TAttMarker

 Ctor of ABC

 Returns gVirtualX global

 The WindowAttributes_t structure is set to default.

 Looks up the string name of a color "cname" with respect to the screen
 associated with the specified colormap. It returns the exact color value.
 If the color name is not in the Host Portable Character Encoding,
 the result is implementation dependent.

 cmap  - the colormap
 cname - the color name string; use of uppercase or lowercase
         does not matter
 color - returns the exact color value for later use

 The ColorStruct_t structure is set to default. Let system think we
 could parse color.

 Allocates a read-only colormap entry corresponding to the closest RGB
 value supported by the hardware. If no cell could be allocated it
 returns kFALSE, otherwise kTRUE.

 The pixel value is set to default. Let system think we could allocate
 color.

 cmap  - the colormap
 color - specifies and returns the values actually used in the cmap

 Returns the current RGB value for the pixel in the "color" structure

 The color components are set to default.

 cmap  - the colormap
 color - specifies and returns the RGB values for the pixel specified
         in the structure

 The "event" is set to default event.
 This method however, should never be called.

 Gets contents of the paste buffer "atom" into the string "text".
 (nchar = number of characters) If "del" is true deletes the paste
 buffer afterwards.

 Initializes the X system. Returns kFALSE in case of failure.
 It is implementation dependent.

 Clears the entire area of the current window.

 Deletes current window.

 Deletes current pixmap.

 Copies the pixmap "wid" at the position [xpos,ypos] in the current window.

On a HiDPI resolution it can be > 1., this means glViewport should use
scaled width and height.

 Creates OpenGL context for window "wid"

 Deletes OpenGL context for window "wid"

Create window with special pixel format. Noop everywhere except Cocoa.

 Creates OpenGL context for window "windowID".

 Makes context ctx current OpenGL context.

 Asks OpenGL subsystem about the current OpenGL context.

 Flushes OpenGL buffer.

 Draws a box between [x1,y1] and [x2,y2] according to the "mode".

 mode  - drawing mode:
         mode = 0 hollow  (kHollow)
         mode = 1 solid   (kSolid)

 Draws a cell array. The drawing is done with the pixel presicion
 if (x2-x1)/nx (or y) is not a exact pixel number the position of
 the top rigth corner may be wrong.

 x1,y1 - left down corner
 x2,y2 - right up corner
 nx,ny - array size
 ic    - array

 Fills area described by the polygon.

 n       - number of points
 xy(2,n) - list of points

 Draws a line.

 x1,y1 - begin of line
 x2,y2 - end of line

 Draws a line through all points in the list.

 n  - number of points
 xy - list of points

 Draws "n" markers with the current attributes at position [x,y].

 n  - number of markers to draw
 xy - an array of x,y marker coordinates

 Draws a text string using current font.

 x,y   - text position
 angle - text angle
 mgn   - magnification factor
 text  - text string
 mode  - drawing mode:
         mode = 0 the background is not drawn (kClear)
         mode = 1 the background is drawn (kOpaque)

 Draws a text string using current font.

 x,y   - text position
 angle - text angle
 mgn   - magnification factor
 text  - text string
 mode  - drawing mode:
         mode = 0 the background is not drawn (kClear)
         mode = 1 the background is drawn (kOpaque)

 Executes the command "code" coming from the other threads (Win32)

 Queries the double buffer value for the window "wid".

 Returns character up vector.

 Returns position and size of window "wid".

 wid  - window identifier
        if wid < 0 the size of the display is returned
 x, y - returned window position
 w, h - returned window size

 Returns hostname on which the display is opened.

 Returns the current native event handle.

 Returns pixel value associated to specified ROOT color number "cindex".

 Returns the maximum number of planes.

 Returns RGB values for color "index".

 Returns the size of the specified character string "mess".

 w    - the text width
 h    - the text height
 mess - the string

 Returns the size of the specified character string "mess".

 w    - the text width
 h    - the text height
 mess - the string

 Returns the ascent of the current font (in pixels).
 The ascent of a font is the distance from the baseline
 to the highest position characters extend to

 Default version is noop, but in principle what
 ROOT understands as ascent is text related.

 Returns the descent of the current font (in pixels.
 The descent is the distance from the base line
 to the lowest point characters extend to.

 Default version is noop, but in principle what
 ROOT understands as descent requires a certain text.

 Returns the current font magnification factor

 Returns True when TrueType fonts are used

 Returns the X11 window identifier.

 wid - workstation identifier (input)

 Creates a new window and return window number.
 Returns -1 if window initialization fails.

 Registers a window created by Qt as a ROOT window

 w, h - the width and height, which define the window size

 Registers a pixmap created by TGLManager as a ROOT pixmap

 w, h - the width and height, which define the pixmap size

 Removes the created by Qt window "qwid".

 Moves the window "wid" to the specified x and y coordinates.
 It does not change the window's size, raise the window, or change
 the mapping state of the window.

 x, y - coordinates, which define the new position of the window
        relative to its parent.

 Creates a pixmap of the width "w" and height "h" you specified.

 Returns the pointer position.

 If id is NULL - loads the specified gif file at position [x0,y0] in the
 current window. Otherwise creates pixmap from gif file

 Requests Locator position.
 x,y  - cursor position at moment of button press (output)
 ctyp - cursor type (input)
        ctyp = 1 tracking cross
        ctyp = 2 cross-hair
        ctyp = 3 rubber circle
        ctyp = 4 rubber band
        ctyp = 5 rubber rectangle

 mode - input mode
        mode = 0 request
        mode = 1 sample

 The returned value is:
        in request mode:
                       1 = left is pressed
                       2 = middle is pressed
                       3 = right is pressed
        in sample mode:
                       11 = left is released
                       12 = middle is released
                       13 = right is released
                       -1 = nothing is pressed or released
                       -2 = leave the window
                     else = keycode (keyboard is pressed)

 Requests string: text is displayed and can be edited with Emacs-like
 keybinding. Returns termination code (0 for ESC, 1 for RETURN)

 x,y  - position where text is displayed
 text - displayed text (as input), edited text (as output)

 Rescales the window "wid".

 wid - window identifier
 w   - the width
 h   - the heigth

 Resizes the specified pixmap "wid".

 w, h - the width and height which define the pixmap dimensions

 Resizes the window "wid" if necessary.

 Selects the window "wid" to which subsequent output is directed.

 Selects the pixmap "qpixid".

 Sets character up vector.

 Turns off the clipping for the window "wid".

 Sets clipping region for the window "wid".

 wid  - window indentifier
 x, y - origin of clipping rectangle
 w, h - the clipping rectangle dimensions

 The cursor "cursor" will be used when the pointer is in the
 window "wid".

 Sets the double buffer on/off on the window "wid".
 wid  - window identifier.
        999 means all opened windows.
 mode - the on/off switch
        mode = 1 double buffer is on
        mode = 0 double buffer is off

 Turns double buffer mode off.

 Turns double buffer mode on.

 Sets the drawing mode.

 mode = 1 copy
 mode = 2 xor
 mode = 3 invert
 mode = 4 set the suitable mode for cursor echo according to the vendor

 Sets color index "cindex" for fill areas.

 Sets fill area style.

 style - compound fill area interior style
         style = 1000 * interiorstyle + styleindex

 Sets color index "cindex" for drawing lines.

 Sets the line type.

 n       - length of the dash list
           n <= 0 use solid lines
           n >  0 use dashed lines described by dash(n)
                 e.g. n = 4,dash = (6,3,1,3) gives a dashed-dotted line
                 with dash length 6 and a gap of 7 between dashes
 dash(n) - dash segment lengths

 Sets the line style.

 linestyle <= 1 solid
 linestyle  = 2 dashed
 linestyle  = 3 dotted
 linestyle  = 4 dashed-dotted

 Sets the line width.

 width - the line width in pixels

 Sets color index "cindex" for markers.

 Sets marker size index.

 markersize - the marker scale factor

 Sets marker style.

 Sets opacity of the current window. This image manipulation routine
 works by adding to a percent amount of neutral to each pixels RGB.
 Since it requires quite some additional color map entries is it
 only supported on displays with more than > 8 color planes (> 256
 colors).

 Sets color intensities the specified color index "cindex".

 cindex  - color index
 r, g, b - the red, green, blue intensities between 0.0 and 1.0

 Sets the text alignment.

 talign = txalh horizontal text alignment
 talign = txalv vertical text alignment

 Sets the color index "cindex" for text.

 Sets text font to specified name "fontname".This function returns 0 if
 the specified font is found, 1 if it is not.

 mode - loading flag
        mode = 0 search if the font exist (kCheck)
        mode = 1 search the font and load it if it exists (kLoad)

 Sets the current text font number.

 Sets the current text magnification factor to "mgn"

 Sets the current text size to "textsize"

 Set synchronisation on or off.
 mode : synchronisation on/off
    mode=1  on
    mode<>0 off

 Updates or synchronises client and server once (not permanent).
 according to "mode".
    mode = 1 update
    mode = 0 sync

 Sets the pointer position.
 ix - new X coordinate of pointer
 iy - new Y coordinate of pointer
 Coordinates are relative to the origin of the window id
 or to the origin of the current window if id == 0.

 Writes the current window into GIF file.
 Returns 1 in case of success, 0 otherwise.

 Writes the pixmap "wid" in the bitmap file "pxname".

 wid    - the pixmap address
 w, h   - the width and height of the pixmap.
 pxname - the file name

 Maps the window "id" and all of its subwindows that have had map
 requests. This function has no effect if the window is already mapped.

 Maps all subwindows for the specified window "id" in top-to-bottom
 stacking order.

 Maps the window "id" and all of its subwindows that have had map
 requests on the screen and put this window on the top of of the
 stack of all windows.

 Unmaps the specified window "id". If the specified window is already
 unmapped, this function has no effect. Any child window will no longer
 be visible (but they are still mapped) until another map call is made
 on the parent.

 Destroys the window "id" as well as all of its subwindows.
 The window should never be referenced again. If the window specified
 by the "id" argument is mapped, it is unmapped automatically.

 The DestroySubwindows function destroys all inferior windows of the
 specified window, in bottom-to-top stacking order.

 Raises the specified window to the top of the stack so that no
 sibling window obscures it.

 Lowers the specified window "id" to the bottom of the stack so
 that it does not obscure any sibling windows.

 Moves the specified window to the specified x and y coordinates.
 It does not change the window's size, raise the window, or change
 the mapping state of the window.

 x, y - coordinates, which define the new position of the window
        relative to its parent.

 Changes the size and location of the specified window "id" without
 raising it.

 x, y - coordinates, which define the new position of the window
        relative to its parent.
 w, h - the width and height, which define the interior size of
        the window

 Changes the width and height of the specified window "id", not
 including its borders. This function does not change the window's
 upper-left coordinate.

 w, h - the width and height, which are the interior dimensions of
        the window after the call completes.

 Iconifies the window "id".

 Notify the low level GUI layer ROOT requires "tgwindow" to be
 updated

 Returns kTRUE if the notification was desirable and it was sent

 At the moment only Qt4 layer needs that

 One needs explicitly cast the first parameter to TGWindow to make
 it working in the implementation.

 One needs to process the notification to confine
 all paint operations within "expose" / "paint" like low level event
 or equivalent

 If the specified window is mapped, ReparentWindow automatically
 performs an UnmapWindow request on it, removes it from its current
 position in the hierarchy, and inserts it as the child of the specified
 parent. The window is placed in the stacking order on top with respect
 to sibling windows.

 Sets the background of the window "id" to the specified color value
 "color". Changing the background does not cause the window contents
 to be changed.

 Sets the background pixmap of the window "id" to the specified
 pixmap "pxm".

 Creates an unmapped subwindow for a specified parent window and returns
 the created window. The created window is placed on top in the stacking
 order with respect to siblings. The coordinate system has the X axis
 horizontal and the Y axis vertical with the origin [0,0] at the
 upper-left corner. Each window and pixmap has its own coordinate system.

 parent - the parent window
 x, y   - coordinates, the top-left outside corner of the window's
          borders; relative to the inside of the parent window's borders
 w, h   - width and height of the created window; do not include the
          created window's borders
 border - the border pixel value of the window
 depth  - the window's depth
 clss   - the created window's class; can be InputOutput, InputOnly, or
          CopyFromParent
 visual - the visual type
 attr   - the structure from which the values are to be taken.
 wtype  - the window type

 Opens connection to display server (if such a thing exist on the
 current platform). The encoding and interpretation of the display
 name
 On X11 this method returns on success the X display socket descriptor
 >0, 0 in case of batch mode, and <0 in case of failure (cannot connect
 to display dpyName).

 Closes connection to display server and destroys all windows.

 Returns handle to display (might be usefull in some cases where
 direct X11 manipulation outside of TVirtualX is needed, e.g. GL
 interface).

 Returns handle to visual.

 Might be usefull in some cases where direct X11 manipulation outside
 of TVirtualX is needed, e.g. GL interface.

 Returns screen number.

 Might be usefull in some cases where direct X11 manipulation outside
 of TVirtualX is needed, e.g. GL interface.

 Returns depth of screen (number of bit planes).
 Equivalent to GetPlanes().

 Returns handle to colormap.

 Might be usefull in some cases where direct X11 manipulation outside
 of TVirtualX is needed, e.g. GL interface.

 Returns handle to the default root window created when calling
 XOpenDisplay().

 Returns the atom identifier associated with the specified "atom_name"
 string. If "only_if_exists" is False, the atom is created if it does
 not exist. If the atom name is not in the Host Portable Character
 Encoding, the result is implementation dependent. Uppercase and
 lowercase matter; the strings "thing", "Thing", and "thinG" all
 designate different atoms.

 Returns the parent of the window "id".

 Provides the most common way for accessing a font: opens (loads) the
 specified font and returns a pointer to the appropriate FontStruct_t
 structure. If the font does not exist, it returns NULL.

 Returns the font handle of the specified font structure "fs".

 Explicitely deletes the font structure "fs" obtained via LoadQueryFont().

 Creates a graphics context using the provided GCValues_t *gval structure.
 The mask data member of gval specifies which components in the GC are
 to be set using the information in the specified values structure.
 It returns a graphics context handle GContext_t that can be used with any
 destination drawable or O if the creation falls.

 Changes the components specified by the mask in gval for the specified GC.

 GContext_t gc   - specifies the GC to be changed
 GCValues_t gval - specifies the mask and the values to be set
 (see also the GCValues_t structure)

 Copies the specified components from the source GC "org" to the
 destination GC "dest". The "mask" defines which component to copy
 and it is a data member of GCValues_t.

 Deletes the specified GC "gc".

 Creates the specified cursor. (just return cursor from cursor pool).
 The cursor can be:

 kBottomLeft, kBottomRight, kTopLeft,  kTopRight,
 kBottomSide, kLeftSide,    kTopSide,  kRightSide,
 kMove,       kCross,       kArrowHor, kArrowVer,
 kHand,       kRotate,      kPointer,  kArrowRight,
 kCaret,      kWatch

 Sets the cursor "curid" to be used when the pointer is in the
 window "id".

 Creates a pixmap of the specified width and height and returns
 a pixmap ID that identifies it.

 Creates a pixmap from bitmap data of the width, height, and depth you
 specified and returns a pixmap that identifies it. The width and height
 arguments must be nonzero. The depth argument must be one of the depths
 supported by the screen of the specified drawable.

 id            - specifies which screen the pixmap is created on
 bitmap        - the data in bitmap format
 width, height - define the dimensions of the pixmap
 forecolor     - the foreground pixel values to use
 backcolor     - the background pixel values to use
 depth         - the depth of the pixmap

 Creates a bitmap (i.e. pixmap with depth 1) from the bitmap data.

 id            - specifies which screen the pixmap is created on
 bitmap        - the data in bitmap format
 width, height - define the dimensions of the pixmap

 Explicitely deletes the pixmap resource "pmap".

 Creates a picture pict from data in file "filename". The picture
 attributes "attr" are used for input and output. Returns kTRUE in
 case of success, kFALSE otherwise. If the mask "pict_mask" does not
 exist it is set to kNone.

 Creates a picture pict from data in bitmap format. The picture
 attributes "attr" are used for input and output. Returns kTRUE in
 case of success, kFALSE otherwise. If the mask "pict_mask" does not
 exist it is set to kNone.

 Reads picture data from file "filename" and store it in "ret_data".
 Returns kTRUE in case of success, kFALSE otherwise.

 Delete picture data created by the function ReadPictureDataFromFile.

 Sets the dash-offset and dash-list attributes for dashed line styles
 in the specified GC. There must be at least one element in the
 specified dash_list. The initial and alternating elements (second,
 fourth, and so on) of the dash_list are the even dashes, and the
 others are the odd dashes. Each element in the "dash_list" array
 specifies the length (in pixels) of a segment of the pattern.

 gc        - specifies the GC (see GCValues_t structure)
 offset    - the phase of the pattern for the dashed line-style you
             want to set for the specified GC.
 dash_list - the dash-list for the dashed line-style you want to set
             for the specified GC
 n         - the number of elements in dash_list
 (see also the GCValues_t structure)

 Frees color cell with specified pixel value.

 Returns the number of events that have been received from the X server
 but have not been removed from the event queue.

 Sets the sound bell. Percent is loudness from -100% .. 100%.

 Combines the specified rectangle of "src" with the specified rectangle
 of "dest" according to the "gc".

 src_x, src_y   - specify the x and y coordinates, which are relative
                  to the origin of the source rectangle and specify
                  upper-left corner.
 width, height  - the width and height, which are the dimensions of both
the source and destination rectangles
 dest_x, dest_y - specify the upper-left corner of the destination
                  rectangle

 GC components in use: function, plane-mask, subwindow-mode,
 graphics-exposure, clip-x-origin, clip-y-origin, and clip-mask.
 (see also the GCValues_t structure)

 Changes the attributes of the specified window "id" according the
 values provided in "attr". The mask data member of "attr" specifies
 which window attributes are defined in the attributes argument.
 This mask is the bitwise inclusive OR of the valid attribute mask
 bits; if it is zero, the attributes are ignored.

 Alters the property for the specified window and causes the X server
 to generate a PropertyNotify event on that window.

 id       - the window whose property you want to change
 property - specifies the property name
 type     - the type of the property; the X server does not
            interpret the type but simply passes it back to
            an application that might ask about the window
            properties
 data     - the property data
 len      - the length of the specified data format

 Uses the components of the specified GC to draw a line between the
 specified set of points (x1, y1) and (x2, y2).

 GC components in use: function, plane-mask, line-width, line-style,
 cap-style, fill-style, subwindow-mode, clip-x-origin, clip-y-origin,
 and clip-mask.
 GC mode-dependent components: foreground, background, tile, stipple,
 tile-stipple-x-origin, tile-stipple-y-origin, dash-offset, dash-list.
 (see also the GCValues_t structure)

 Paints a rectangular area in the specified window "id" according to
 the specified dimensions with the window's background pixel or pixmap.

 id - specifies the window
 x, y - coordinates, which are relative to the origin
 w, h - the width and height which define the rectangle dimensions

 Check if there is for window "id" an event of type "type". If there
 is it fills in the event structure and return true. If no such event
 return false.

 Specifies the event "ev" is to be sent to the window "id".
 This function requires you to pass an event mask.

 Force processing of event, sent by SendEvent before.

 Tells WM to send message when window is closed via WM.

 Turns key auto repeat on (kTRUE) or off (kFALSE).

 Establishes a passive grab on the keyboard. In the future, the
 keyboard is actively grabbed, the last-keyboard-grab time is set
 to the time at which the key was pressed (as transmitted in the
 KeyPress event), and the KeyPress event is reported if all of the
 following conditions are true:
    - the keyboard is not grabbed and the specified key (which can
      itself be a modifier key) is logically pressed when the
      specified modifier keys are logically down, and no other
      modifier keys are logically down;
    - either the grab window "id" is an ancestor of (or is) the focus
      window, or "id" is a descendant of the focus window and contains
      the pointer;
    - a passive grab on the same key combination does not exist on any
      ancestor of grab_window

 id       - window id
 keycode  - specifies the KeyCode or AnyKey
 modifier - specifies the set of keymasks or AnyModifier; the mask is
            the bitwise inclusive OR of the valid keymask bits
 grab     - a switch between grab/ungrab key
            grab = kTRUE  grab the key and modifier
            grab = kFALSE ungrab the key and modifier

 Establishes a passive grab on a certain mouse button. That is, when a
 certain mouse button is hit while certain modifier's (Shift, Control,
 Meta, Alt) are active then the mouse will be grabed for window id.
 When grab is false, ungrab the mouse button for this button and modifier.

 Establishes an active pointer grab. While an active pointer grab is in
 effect, further pointer events are only reported to the grabbing
 client window.

 Sets the window name.

 Sets the window icon name.

 Sets the icon name pixmap.

 Sets the windows class and resource name.

 Sets decoration style.

 Tells the window manager the desired position [x,y] of window "id".

 Tells window manager the desired size of window "id".

 w - the width
 h - the height

 Gives the window manager minimum and maximum size hints of the window
 "id". Also specify via "winc" and "hinc" the resize increments.

 wmin, hmin - specify the minimum window size
 wmax, hmax - specify the maximum window size
 winc, hinc - define an arithmetic progression of sizes into which
              the window to be resized (minimum to maximum)

 Sets the initial state of the window "id": either kNormalState
 or kIconicState.

 Tells window manager that the window "id" is a transient window
 of the window "main_id". A window manager may decide not to decorate
 a transient window or may treat it differently in other ways.

 Each character image, as defined by the font in the GC, is treated as an
 additional mask for a fill operation on the drawable.

 id   - the drawable
 gc   - the GC
 x, y - coordinates, which are relative to the origin of the specified
        drawable and define the origin of the first character
 s    - the character string
 len  - the number of characters in the string argument

 GC components in use: function, plane-mask, fill-style, font,
 subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask.
 GC mode-dependent components: foreground, background, tile, stipple,
 tile-stipple-x-origin, and tile-stipple-y-origin.
 (see also the GCValues_t structure)

 Return length of the string "s" in pixels. Size depends on font.

 Returns the font properties.

 Returns the components specified by the mask in "gval" for the
 specified GC "gc" (see also the GCValues_t structure)

 Return the font associated with the graphics context gc

 Retrieves the associated font structure of the font specified font
 handle "fh".

 Free returned FontStruct_t using FreeFontStruct().

 Frees the font structure "fs". The font itself will be freed when
 no other resource references it.

 Clears the entire area in the specified window and it is equivalent to
 ClearArea(id, 0, 0, 0, 0)

 Converts the "keysym" to the appropriate keycode. For example,
 keysym is a letter and keycode is the matching keyboard key (which
 is dependend on the current keyboard mapping). If the specified
 "keysym" is not defined for any keycode, returns zero.

 Fills the specified rectangle defined by [x,y] [x+w,y] [x+w,y+h] [x,y+h].
 using the GC you specify.

 GC components in use are: function, plane-mask, fill-style,
 subwindow-mode, clip-x-origin, clip-y-origin, clip-mask.
 GC mode-dependent components: foreground, background, tile, stipple,
 tile-stipple-x-origin, and tile-stipple-y-origin.
 (see also the GCValues_t structure)

 Draws rectangle outlines of [x,y] [x+w,y] [x+w,y+h] [x,y+h]

 GC components in use: function, plane-mask, line-width, line-style,
 cap-style, join-style, fill-style, subwindow-mode, clip-x-origin,
 clip-y-origin, clip-mask.
 GC mode-dependent components: foreground, background, tile, stipple,
 tile-stipple-x-origin, tile-stipple-y-origin, dash-offset, dash-list.
 (see also the GCValues_t structure)

 Draws multiple line segments. Each line is specified by a pair of points.
 Segment_t *seg - specifies an array of segments
 Int_t nseg     - specifies the number of segments in the array

 GC components in use: function, plane-mask, line-width, line-style,
 cap-style, join-style, fill-style, subwindow-mode, clip-x-origin,
 clip-y-origin, clip-mask.
 GC mode-dependent components: foreground, background, tile, stipple,
 tile-stipple-x-origin, tile-stipple-y-origin, dash-offset, and dash-list.
 (see also the GCValues_t structure)

 Defines which input events the window is interested in. By default
 events are propageted up the window stack. This mask can also be
 set at window creation time via the SetWindowAttributes_t::fEventMask
 attribute.

 Returns the window id of the window having the input focus.

 Changes the input focus to specified window "id".

 Returns the window id of the current owner of the primary selection.
 That is the window in which, for example some text is selected.

 Makes the window "id" the current owner of the primary selection.
 That is the window in which, for example some text is selected.

 Causes a SelectionRequest event to be sent to the current primary
 selection owner. This event specifies the selection property
 (primary selection), the format into which to convert that data before
 storing it (target = XA_STRING), the property in which the owner will
 place the information (sel_property), the window that wants the
 information (id), and the time of the conversion request (when).
 The selection owner responds by sending a SelectionNotify event, which
 confirms the selected atom and type.

 Converts the keycode from the event structure to a key symbol (according
 to the modifiers specified in the event structure and the current
 keyboard mapping). In "buf" a null terminated ASCII string is returned
 representing the string that is currently mapped to the key code.

 event  - specifies the event structure to be used
 buf    - returns the translated characters
 buflen - the length of the buffer
 keysym - returns the "keysym" computed from the event
          if this argument is not NULL

 Translates coordinates in one window to the coordinate space of another
 window. It takes the "src_x" and "src_y" coordinates relative to the
 source window's origin and returns these coordinates to "dest_x" and
 "dest_y" relative to the destination window's origin.

 src            - the source window
 dest           - the destination window
 src_x, src_y   - coordinates within the source window
 dest_x, dest_y - coordinates within the destination window
 child          - returns the child of "dest" if the coordinates
                  are contained in a mapped child of the destination
                  window; otherwise, child is set to 0

 Returns the location and the size of window "id"

 x, y - coordinates of the upper-left outer corner relative to the
        parent window's origin
 w, h - the inside size of the window, not including the border

 Fills the region closed by the specified path. The path is closed
 automatically if the last point in the list does not coincide with the
 first point.

 Point_t *points - specifies an array of points
 Int_t npnt      - specifies the number of points in the array

 GC components in use: function, plane-mask, fill-style, fill-rule,
 subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask.  GC
 mode-dependent components: foreground, background, tile, stipple,
 tile-stipple-x-origin, and tile-stipple-y-origin.
 (see also the GCValues_t structure)

 Returns the root window the pointer is logically on and the pointer
 coordinates relative to the root window's origin.

 id             - specifies the window
 rotw           - the root window that the pointer is in
 childw         - the child window that the pointer is located in, if any
 root_x, root_y - the pointer coordinates relative to the root window's
                  origin
 win_x, win_y   - the pointer coordinates relative to the specified
                  window "id"
 mask           - the current state of the modifier keys and pointer
                  buttons

 Sets the foreground color for the specified GC (shortcut for ChangeGC
 with only foreground mask set).

 gc         - specifies the GC
 foreground - the foreground you want to set
 (see also the GCValues_t structure)

 Sets clipping rectangles in graphics context. [x,y] specify the origin
 of the rectangles. "recs" specifies an array of rectangles that define
 the clipping mask and "n" is the number of rectangles.
 (see also the GCValues_t structure)

 Flushes (mode = 0, default) or synchronizes (mode = 1) X output buffer.
 Flush flushes output buffer. Sync flushes buffer and waits till all
 requests have been processed by X server.

 Creates a new empty region.

 Destroys the region "reg".

 Updates the destination region from a union of the specified rectangle
 and the specified source region.

 rect - specifies the rectangle
 src  - specifies the source region to be used
 dest - returns the destination region

 Returns a region for the polygon defined by the points array.

 points  - specifies an array of points
 np      - specifies the number of points in the polygon
 winding - specifies the winding-rule is set (kTRUE) or not(kFALSE)

 Computes the union of two regions.

 rega, regb - specify the two regions with which you want to perform
              the computation
 result     - returns the result of the computation

 Computes the intersection of two regions.

 rega, regb - specify the two regions with which you want to perform
              the computation
 result     - returns the result of the computation

 Subtracts regb from rega and stores the results in result.

 Calculates the difference between the union and intersection of
 two regions.

 rega, regb - specify the two regions with which you want to perform
              the computation
 result     - returns the result of the computation

 Returns kTRUE if the region reg is empty.

 Returns kTRUE if the point [x, y] is contained in the region reg.

 Returns kTRUE if the two regions have the same offset, size, and shape.

 Returns smallest enclosing rectangle.

 Returns list of font names matching fontname regexp, like "-*-times-*".
 The pattern string can contain any characters, but each asterisk (*)
 is a wildcard for any number of characters, and each question mark (?)
 is a wildcard for a single character. If the pattern string is not in
 the Host Portable Character Encoding, the result is implementation
 dependent. Use of uppercase or lowercase does not matter. Each returned
 string is null-terminated.

 fontname - specifies the null-terminated pattern string that can
            contain wildcard characters
 max      - specifies the maximum number of names to be returned
 count    - returns the actual number of font names

 Frees the specified the array of strings "fontlist".

 Allocates the memory needed for an drawable.

 width  - the width of the image, in pixels
 height - the height of the image, in pixels

 Returns the width and height of the image id

 Overwrites the pixel in the image with the specified pixel value.
 The image must contain the x and y coordinates.

 id    - specifies the image
 x, y  - coordinates
 pixel - the new pixel value

 Combines an image with a rectangle of the specified drawable. The
 section of the image defined by the x, y, width, and height arguments
 is drawn on the specified part of the drawable.

 id   - the drawable
 gc   - the GC
 img  - the image you want combined with the rectangle
 dx   - the offset in X from the left edge of the image
 dy   - the offset in Y from the top edge of the image
 x, y - coordinates, which are relative to the origin of the
        drawable and are the coordinates of the subimage
 w, h - the width and height of the subimage, which define the
        rectangle dimensions

 GC components in use: function, plane-mask, subwindow-mode,
 clip-x-origin, clip-y-origin, and clip-mask.
 GC mode-dependent components: foreground and background.
 (see also the GCValues_t structure)

 Deallocates the memory associated with the image img

 pointer to the current internal window used in canvas graphics

 Returns an array of pixels created from a part of drawable (defined by x, y, w, h)
 in format:
 b1, g1, r1, 0,  b2, g2, r2, 0 ... bn, gn, rn, 0 ..

 Pixels are numbered from left to right and from top to bottom.
 By default all pixels from the whole drawable are returned.

 Note that return array is 32-bit aligned

 create pixmap from RGB data. RGB data is in format :
 b1, g1, r1, 0,  b2, g2, r2, 0 ... bn, gn, rn, 0 ..

 Pixels are numbered from left to right and from top to bottom.
 Note that data must be 32-bit aligned

 The Nonrectangular Window Shape Extension adds nonrectangular
 windows to the System.
 This allows for making shaped (partially transparent) windows

 Returns the width of the screen in millimeters.

 Deletes the specified property only if the property was defined on the
 specified window and causes the X server to generate a PropertyNotify
 event on the window unless the property does not exist.

 Returns the actual type of the property; the actual format of the property;
 the number of 8-bit, 16-bit, or 32-bit items transferred; the number of
 bytes remaining to be read in the property; and a pointer to the data
 actually returned.

 Changes the specified dynamic parameters if the pointer is actively
 grabbed by the client and if the specified time is no earlier than the
 last-pointer-grab time and no later than the current X server time.

 Requests that the specified selection be converted to the specified
 target type.

 Changes the owner and last-change time for the specified selection.

 Alters the property for the specified window and causes the X server
 to generate a PropertyNotify event on that window.

 Add XdndAware property and the list of drag and drop types to the
 Window win.

 Add the list of drag and drop types to the Window win.

 Recursively search in the children of Window for a Window which is at
 location x, y and is DND aware, with a maximum depth of maxd.

 Checks if the Window is DND aware, and knows any of the DND formats
 passed in argument.

 Start a modal session for a dialog window.

 Returns 1 if window system server supports extension given by the
 argument, returns 0 in case extension is not supported and returns -1
 in case of error (like server not initialized).

 Map the XftFont with the Graphics Context using it.