Add methods to enable and disable the system's input methods.

This needs to be done from FLTK as it affects the window interaction,
which FLTK is largely responsible for.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10314 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 53 insertions, 14 deletions

diff --git a/src/Fl_x.cxx b/src/Fl_x.cxx
index 20041dfec..982369758 100644
--- a/src/Fl_x.cxx
+++ b/src/Fl_x.cxx
@@ -319,6 +319,7 @@ XVisualInfo *fl_visual;
 Colormap fl_colormap;
 static XIM fl_xim_im = 0;
 XIC fl_xim_ic = 0;
+static Window fl_xim_win = 0;
 static char fl_is_over_the_spot = 0;
 static XRectangle status_area;
 
@@ -614,6 +615,55 @@ static void fl_init_xim() {
   if(xim_styles) XFree(xim_styles);
 }
 
+void fl_xim_deactivate(void);
+
+void fl_xim_activate(Window xid) {
+  if (!fl_xim_im)
+    return;
+
+  // If the focused window has changed, then use the brute force method
+  // of completely recreating the input context.
+  if (fl_xim_win != xid) {
+    fl_xim_deactivate();
+
+    fl_new_ic();
+    fl_xim_win = xid;
+
+    XSetICValues(fl_xim_ic,
+                 XNFocusWindow, fl_xim_win,
+                 XNClientWindow, fl_xim_win,
+                 NULL);
+  }
+
+  fl_set_spot(spotf, spots, spot.x, spot.y, spot.width, spot.height);
+}
+
+void fl_xim_deactivate(void) {
+  if (!fl_xim_ic)
+    return;
+
+  XDestroyIC(fl_xim_ic);
+  fl_xim_ic = NULL;
+
+  fl_xim_win = 0;
+}
+
+void Fl::enable_im() {
+  Fl_Window *win;
+
+  win = Fl::first_window();
+  if (win && win->shown()) {
+    fl_xim_activate(fl_xid(win));
+    XSetICFocus(fl_xim_ic);
+  } else {
+    fl_new_ic();
+  }
+}
+
+void Fl::disable_im() {
+  fl_xim_deactivate();
+}
+
 void fl_open_display() {
   if (fl_display) return;
 
@@ -1259,10 +1309,9 @@ int fl_handle(const XEvent& thisevent)
   XEvent xevent = thisevent;
   fl_xevent = &thisevent;
   Window xid = xevent.xany.window;
-  static Window xim_win = 0;
 
   if (fl_xim_ic && xevent.type == DestroyNotify &&
-        xid != xim_win && !fl_find(xid))
+        xid != fl_xim_win && !fl_find(xid))
   {
     XIM xim_im;
     xim_im = XOpenIM(fl_display, NULL, NULL, NULL);
@@ -1278,19 +1327,9 @@ int fl_handle(const XEvent& thisevent)
   }
 
   if (fl_xim_ic && (xevent.type == FocusIn))
-  {
-    if (xim_win != xid) {
-      xim_win  = xid;
-      XDestroyIC(fl_xim_ic);
-      fl_xim_ic = NULL;
-      fl_new_ic();
-      XSetICValues(fl_xim_ic, XNFocusWindow, xevent.xclient.window,
-                   XNClientWindow, xid, NULL);
-    }
-    fl_set_spot(spotf, spots, spot.x, spot.y, spot.width, spot.height);
-  }
+    fl_xim_activate(xid);
 
-  if ( XFilterEvent((XEvent *)&xevent, 0) )
+  if (fl_xim_ic && XFilterEvent((XEvent *)&xevent, 0))
       return(1);
   
 #if USE_XRANDR