Added widget visibilit indicator to Fluid (STR #2669).

CHANGES.txt

@@ -102,6 +102,7 @@ Changes in FLTK 1.4.0					Released: ??? ?? 2019
   Other Improvements
 
   - (add new items here)
+  - Added widget visibilit indicator to Fluid (STR #2669).
   - Added Fl_Input_::append() method (STR #2953).
   - Fix for STR#3473 (and its duplicate STR#3507) to restore configure-based
     builds on recent Linux/Unix distributions where the freetype-config

fluid/Fl_Type.cxx

@@ -41,10 +41,12 @@
 #include <FL/Fl_Pixmap.H>
 #include "pixmaps/lock.xpm"
 #include "pixmaps/protected.xpm"
+#include "pixmaps/invisible.xpm"
 //#include "pixmaps/unlock.xpm"
 
 static Fl_Pixmap	lock_pixmap(lock_xpm);
-static Fl_Pixmap	protected_pixmap(protected_xpm);
+static Fl_Pixmap    protected_pixmap(protected_xpm);
+static Fl_Pixmap    invisible_pixmap(invisible_xpm);
 //static Fl_Pixmap	unlock_pixmap(unlock_xpm);
 
 #include "pixmaps/flWindow.xpm"
@@ -389,6 +391,10 @@ void Widget_Browser::item_draw(void *v, int X, int Y, int, int) const {
     case 0: lock_pixmap.draw(X - 17, Y); break;
     case 2: protected_pixmap.draw(X - 17, Y); break;
   }
+
+  if (l->is_widget() && ((Fl_Widget_Type*)l)->o && !((Fl_Widget_Type*)l)->o->visible()) {
+    invisible_pixmap.draw(X - 17, Y);
+  }
   
   // Indent=12 per level: Now write the text that comes after the graphics representation
   Y += comment_incr;

fluid/Fl_Widget_Type.cxx

@@ -940,7 +940,10 @@ void visible_cb(Fl_Light_Button* i, void* v) {
 	}
       }
     }
-    if (mod) set_modflag(1);
+    if (mod) {
+      set_modflag(1);
+      redraw_browser();
+    }
   }
 }
 

fluid/pixmaps/invisible.xpm

@@ -0,0 +1,29 @@
+/* XPM */
+static const char *invisible_xpm[] = {
+/* width height ncolors chars_per_pixel */
+"16 16 6 1",
+/* colors */
+"` c #000000",
+"a c #80c080",
+"b c #c0ffc0",
+"c c none",
+"M c #e0e0e0",
+"e c #408040",
+/* pixels */
+"cccccccccccccccc",
+"cccccccccccccccc",
+"cccccccccccccccc",
+"cccccccccccccccc",
+"cccccccccccccccc",
+"cccccccccccccccc",
+"ccMMMccccccccccc",
+"ccM`Mccccccccccc",
+"MMMMMccccccccccc",
+"M```Mccccccccccc",
+"MMM`Mccccccccccc",
+"ccM`Mccccccccccc",
+"MMM`MMMccccccccc",
+"M`````Mccccccccc",
+"MMMMMMMccccccccc",
+"cccccccccccccccc"
+};