Update support of rescaling which no longer involves hide/show of the window.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12385 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 6 insertions, 3 deletions

diff --git a/test/offscreen.cxx b/test/offscreen.cxx
index bcb140f49..43932fb60 100644
--- a/test/offscreen.cxx
+++ b/test/offscreen.cxx
@@ -96,6 +96,11 @@ void oscr_box::draw()
   // then add the offscreen on top of the grey background
   if (has_oscr()) // offscreen exists
   {
+    if (scale != Fl_Graphics_Driver::default_driver().scale()) {
+      // the screen scaling factor has changed
+      fl_scale_offscreen(oscr);
+      scale = Fl_Graphics_Driver::default_driver().scale();
+    }
     fl_copy_offscreen(xo, yo, wd, ht, oscr, page_x, page_y);
   }
   else  // create offscreen
@@ -105,6 +110,7 @@ void oscr_box::draw()
     offsc_w = offscreen_size;
     offsc_h = offscreen_size;
     oscr = fl_create_offscreen(offsc_w, offsc_h);
+    scale = Fl_Graphics_Driver::default_driver().scale();
   }
 } // draw method
 
@@ -113,9 +119,6 @@ int oscr_box::handle(int ev)
 {
   int ret = Fl_Box::handle(ev);
   
-  if (ev == FL_HIDE && oscr) {
-    fl_scale_offscreen(oscr);
-  }
   // handle dragging of visible page area - if a valid context exists
   if (has_oscr())
   {