[gimp] app: gimp_paint_tool_oper_update(): stop/start the draw tool only when needed

[Michael Natterer <mitch src gnome org>]

commit 38153d7476f7c9388766a386d5394c27998d3027
Author: Michael Natterer <mitch gimp org>
Date:   Mon Oct 11 22:26:52 2010 +0200

    app: gimp_paint_tool_oper_update(): stop/start the draw tool only when needed

 app/tools/gimppainttool.c |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)
---
diff --git a/app/tools/gimppainttool.c b/app/tools/gimppainttool.c
index 81c4db9..3e8f51c 100644
--- a/app/tools/gimppainttool.c
+++ b/app/tools/gimppainttool.c
@@ -588,7 +588,10 @@ gimp_paint_tool_oper_update (GimpTool         *tool,
       return;
     }
 
-  if (gimp_draw_tool_is_active (draw_tool))
+  gimp_draw_tool_pause (draw_tool);
+
+  if (gimp_draw_tool_is_active (draw_tool) &&
+      draw_tool->display != display)
     gimp_draw_tool_stop (draw_tool);
 
   gimp_tool_pop_status (tool, display);
@@ -698,11 +701,18 @@ gimp_paint_tool_oper_update (GimpTool         *tool,
           paint_tool->draw_line = FALSE;
         }
 
-      gimp_draw_tool_start (draw_tool, display);
+      if (! gimp_draw_tool_is_active (draw_tool))
+        gimp_draw_tool_start (draw_tool, display);
+    }
+  else if (gimp_draw_tool_is_active (draw_tool))
+    {
+      gimp_draw_tool_stop (draw_tool);
     }
 
   GIMP_TOOL_CLASS (parent_class)->oper_update (tool, coords, state, proximity,
                                                display);
+
+  gimp_draw_tool_resume (draw_tool);
 }
 
 static void