Fl_Text_Display: avoid blinking by painting the full widget background only to the printer.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8466 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/Fl_Text_Display.cxx

@@ -38,6 +38,7 @@
 #include <FL/Fl_Text_Buffer.H>
 #include <FL/Fl_Text_Display.H>
 #include <FL/Fl_Window.H>
+#include <FL/Fl_Printer.H>
 
 #undef min
 #undef max
@@ -3359,8 +3360,10 @@ void Fl_Text_Display::draw(void) {
   // draw the non-text, non-scrollbar areas.
   if (damage() & FL_DAMAGE_ALL) {
     //    printf("drawing all (box = %d)\n", box());
-    // draw the background
+    if (Fl_Surface_Device::surface()->class_name() == Fl_Printer::class_id) {
+      // if to printer, draw the background
       fl_rectf(text_area.x, text_area.y, text_area.w, text_area.h, color() );
+    }
     // draw the box()
     int W = w(), H = h();
     draw_box(box(), x(), y(), W, H, color());