[gimp/soc-2013-n-point-deformation-tool] app: npd-tool: start and stop the tool more correctly

[Marek Dvoroznak <dvoromar src gnome org>]

commit 54071e3eb2a5a89ed409091b621257b75fa689b1
Author: Marek Dvoroznak <dvoromar gmail com>
Date:   Mon Aug 26 01:41:56 2013 +0200

    app: npd-tool: start and stop the tool more correctly
    
    Don't add a control point after the first click on the drawable,
    just start the tool. Don't stop the tool if it hasn't been started.

 app/tools/gimpnpointdeformationtool.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/app/tools/gimpnpointdeformationtool.c b/app/tools/gimpnpointdeformationtool.c
index 5e530a7..058f41c 100644
--- a/app/tools/gimpnpointdeformationtool.c
+++ b/app/tools/gimpnpointdeformationtool.c
@@ -203,7 +203,9 @@ gimp_n_point_deformation_tool_control (GimpTool       *tool,
       break;
 
     case GIMP_TOOL_ACTION_HALT:
-      gimp_n_point_deformation_tool_halt (npd_tool);
+      /* stop the tool only when it has been started */
+      if (npd_tool->active)
+        gimp_n_point_deformation_tool_halt (npd_tool);
       break;
     }
 
@@ -462,9 +464,12 @@ gimp_n_point_deformation_tool_button_press (GimpTool            *tool,
 
   if (display != tool->display)
     {
+      /* this is the first click on the drawable - just start the tool */
       gimp_n_point_deformation_tool_start (npd_tool, display);
+      return;
     }
 
+  /* this is at least second click on the drawable - do usual work */
   gimp_tool_control_activate (tool->control);
   npd_tool->selected_cp = NULL;