[gimp] app: draw the free select tool's line in one stroke()

[Michael Natterer <mitch src gnome org>]

commit 4b89850a2e1f8edba34e9873d7bfe8854f39e67a
Author: Michael Natterer <mitch gimp org>
Date:   Sun Sep 26 14:17:04 2010 +0200

    app: draw the free select tool's line in one stroke()
    
    This is clearly too complicated for general use, but it's only a test
    case for the new APIs.

 app/tools/gimpfreeselecttool.c |   41 ++++++++++++++++++++++++++++++++-------
 1 files changed, 33 insertions(+), 8 deletions(-)
---
diff --git a/app/tools/gimpfreeselecttool.c b/app/tools/gimpfreeselecttool.c
index 2669541..3c2b7bb 100644
--- a/app/tools/gimpfreeselecttool.c
+++ b/app/tools/gimpfreeselecttool.c
@@ -39,6 +39,7 @@
 
 #include "widgets/gimphelp-ids.h"
 
+#include "display/gimpcanvasgroup.h"
 #include "display/gimpdisplay.h"
 
 #include "gimpfreeselecttool.h"
@@ -1528,6 +1529,8 @@ gimp_free_select_tool_draw (GimpDrawTool *draw_tool)
   GimpFreeSelectTool        *fst                   = GIMP_FREE_SELECT_TOOL (draw_tool);
   GimpFreeSelectToolPrivate *priv                  = GET_PRIVATE (fst);
   GimpTool                  *tool                  = GIMP_TOOL (draw_tool);
+  GimpCanvasItem            *lines;
+  GimpCanvasItem            *last_line             = NULL;
   gboolean                   hovering_first_point  = FALSE;
   gboolean                   handles_wants_to_show = FALSE;
   GimpCoords                 coords                = { priv->last_coords.x,
@@ -1541,9 +1544,10 @@ gimp_free_select_tool_draw (GimpDrawTool *draw_tool)
                                         tool->display,
                                         NO_CLICK_TIME_AVAILABLE,
                                         &coords);
-  gimp_draw_tool_add_lines (draw_tool,
-                            priv->points, priv->n_points,
-                            FALSE);
+
+  lines = gimp_draw_tool_add_lines (draw_tool,
+                                    priv->points, priv->n_points,
+                                    FALSE);
 
   /* We always show the handle for the first point, even with button1
    * down, since releasing the button on the first point will close
@@ -1604,11 +1608,32 @@ gimp_free_select_tool_draw (GimpDrawTool *draw_tool)
     {
       GimpVector2 last = priv->points[priv->n_points - 1];
 
-      gimp_draw_tool_add_line (draw_tool,
-                               last.x,
-                               last.y,
-                               priv->pending_point.x,
-                               priv->pending_point.y);
+      last_line = gimp_draw_tool_add_line (draw_tool,
+                                           last.x,
+                                           last.y,
+                                           priv->pending_point.x,
+                                           priv->pending_point.y);
+    }
+
+  if (last_line)
+    {
+      GimpCanvasItem *stroke_group;
+
+      stroke_group = gimp_canvas_group_new ();
+      gimp_canvas_group_set_group_stroking (GIMP_CANVAS_GROUP (stroke_group),
+                                            TRUE);
+      gimp_draw_tool_add_item (draw_tool, stroke_group);
+      g_object_unref (stroke_group);
+
+      g_object_ref (lines);
+      gimp_draw_tool_remove_item (draw_tool, lines);
+      gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (stroke_group), lines);
+      g_object_ref (lines);
+
+      g_object_ref (last_line);
+      gimp_draw_tool_remove_item (draw_tool, last_line);
+      gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (stroke_group), last_line);
+      g_object_ref (last_line);
     }
 }