GTK 窗体小记

      今天终于解决了这个难题, 围绕它已经折磨我好久了 . 现在把心得写下, 以便同仁和自己以后参考.

根据GTK+的外观设置API :gtk_window_set_decorated (window,FALSE); 这个API可以创建无标题栏的窗体. 二话不说, 直接查找API的源代码:

 

 void gtk_window_set_decorated (GtkWindow *window,gboolean   setting)
2 {
3   ... gdk_window_set_decorations (GTK_WIDGET (window)->window,GDK_DECOR_ALL);
4       else
5       gdk_window_set_decorations (GTK_WIDGET (window)->window, 0);
6  ...}
7 

再往下找(在gdk的X11里面找):

 

 1 void gdk_window_set_decorations (GdkWindow *window,GdkWMDecoration decorations)
 2 {
 3   MotifWmHints hints;
 4 
 5   g_return_if_fail (GDK_IS_WINDOW (window)); 
 6   hints.flags = MWM_HINTS_DECORATIONS;
 7   hints.decorations = decorations; 
 8   gdk_window_set_mwm_hints (window, &hints);
 9 }
10 
11 

again:

 1 static void gdk_window_set_mwm_hints (GdkWindow *window,MotifWmHints *new_hints)
 2 {
 3   GdkDisplay *display;
 4   Atom hints_atom = None;
 5   guchar *data;
 6   MotifWmHints *hints;
 7   Atom type;
 8   gint format;
 9   gulong nitems;
10   gulong bytes_after;
11  
12   if (GDK_WINDOW_DESTROYED (window))
13     return;
14  
15   display = gdk_drawable_get_display (window); 
16   hints_atom = gdk_x11_get_xatom_by_name_for_display (display, _XA_MOTIF_WM_HINTS);
17 
18   XGetWindowProperty (GDK_WINDOW_XDISPLAY (window), GDK_WINDOW_XID (window),
19         hints_atom, 0, sizeof (MotifWmHints)/sizeof (long),
20         False, AnyPropertyType, &type, &format, &nitems,
21         &bytes_after, &data);
22  
23   if (type == None)
24     hints = new_hints;
25   else
26   {
27       hints = (MotifWmHints *)data;
28  
29       if (new_hints->flags & MWM_HINTS_FUNCTIONS)
30  {
31    hints->flags |= MWM_HINTS_FUNCTIONS;
32    hints->functions = new_hints->functions;
33  }
34  if (new_hints->flags & MWM_HINTS_DECORATIONS)
35  {
36    hints->flags |= MWM_HINTS_DECORATIONS;
37    hints->decorations = new_hints->decorations;
38  }
39 }
40  
41   XChangeProperty (GDK_WINDOW_XDISPLAY (window), GDK_WINDOW_XID (window),
42      hints_atom, hints_atom, 32, PropModeReplace,
43      (guchar *)hints, sizeof (MotifWmHints)/sizeof (long));
44  
45   if (hints != new_hints)
46     XFree (hints);
47 }
48 
49 

 

就是它了 创建无装饰窗体的核心代码就是它了. 再从中进行分析, 我封装出了这样的函数代码:

x

 1 static void gdk_window_set_mwm_hints (GdkWindow *window,MotifWmHints *new_hints)
 2 {
 3   GdkDisplay *display;
 4   Atom hints_atom = None;
 5   guchar *data;
 6   MotifWmHints *hints;
 7   Atom type;
 8   gint format;
 9   gulong nitems;
10   gulong bytes_after;
11  
12   if (GDK_WINDOW_DESTROYED (window))
13     return;
14  
15   display = gdk_drawable_get_display (window); 
16   hints_atom = gdk_x11_get_xatom_by_name_for_display (display, _XA_MOTIF_WM_HINTS);
17 
18   XGetWindowProperty (GDK_WINDOW_XDISPLAY (window), GDK_WINDOW_XID (window),
19         hints_atom, 0, sizeof (MotifWmHints)/sizeof (long),
20         False, AnyPropertyType, &type, &format, &nitems,
21         &bytes_after, &data);
22  
23   if (type == None)
24     hints = new_hints;
25   else
26   {
27       hints = (MotifWmHints *)data;
28  
29       if (new_hints->flags & MWM_HINTS_FUNCTIONS)
30  {
31    hints->flags |= MWM_HINTS_FUNCTIONS;
32    hints->functions = new_hints->functions;
33  }
34  if (new_hints->flags & MWM_HINTS_DECORATIONS)
35  {
36    hints->flags |= MWM_HINTS_DECORATIONS;
37    hints->decorations = new_hints->decorations;
38  }
39 }
40  
41   XChangeProperty (GDK_WINDOW_XDISPLAY (window), GDK_WINDOW_XID (window),
42      hints_atom, hints_atom, 32, PropModeReplace,
43      (guchar *)hints, sizeof (MotifWmHints)/sizeof (long));
44  
45   if (hints != new_hints)
46     XFree (hints);
47 }
48 
49 

make  运行 .

PS: 典型的窗口管理程序的应用问题 不过要找到这个点还真费了不少事 .希望对大家有所帮助。