Add fl_focus_rect function to driver.

Focus rectangles are dotted lines. The default implementation uses the dotted line style, However, for systems without line stye, we draw many dots instead.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11110 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

2 files changed, 12 insertions, 0 deletions

diff --git a/src/drivers/GDI/Fl_GDI_Graphics_Driver.h b/src/drivers/GDI/Fl_GDI_Graphics_Driver.h
index 1e8ff72d7..06e040f1a 100644
--- a/src/drivers/GDI/Fl_GDI_Graphics_Driver.h
+++ b/src/drivers/GDI/Fl_GDI_Graphics_Driver.h
@@ -69,6 +69,7 @@ protected:
   // --- implementation is in src/fl_rect.cxx which includes src/cfg_gfx/gdi_rect.cxx
   void point(int x, int y);
   void rect(int x, int y, int w, int h);
+  void focus_rect(int x, int y, int w, int h);
   void rectf(int x, int y, int w, int h);
   void line(int x, int y, int x1, int y1);
   void line(int x, int y, int x1, int y1, int x2, int y2);
diff --git a/src/drivers/GDI/Fl_GDI_Graphics_Driver_rect.cxx b/src/drivers/GDI/Fl_GDI_Graphics_Driver_rect.cxx
index 553d7c043..796896cdd 100644
--- a/src/drivers/GDI/Fl_GDI_Graphics_Driver_rect.cxx
+++ b/src/drivers/GDI/Fl_GDI_Graphics_Driver_rect.cxx
@@ -48,6 +48,17 @@ void Fl_GDI_Graphics_Driver::rect(int x, int y, int w, int h) {
   LineTo(fl_gc, x, y);
 }
 
+void Fl_GDI_Graphics_Driver::focus_rect(int x, int y, int w, int h) {
+  // Windows 95/98/ME do not implement the dotted line style, so draw
+  // every other pixel around the focus area...
+  w--; h--;
+  int i=1, xx, yy;
+  for (xx = 0; xx < w; xx++, i++) if (i & 1) point(x + xx, y);
+  for (yy = 0; yy < h; yy++, i++) if (i & 1) point(x + w, y + yy);
+  for (xx = w; xx > 0; xx--, i++) if (i & 1) point(x + xx, y + h);
+  for (yy = h; yy > 0; yy--, i++) if (i & 1) point(x, y + yy);
+}
+
 void Fl_GDI_Graphics_Driver::rectf(int x, int y, int w, int h) {
   if (w<=0 || h<=0) return;
   RECT rect;