[gimp] Bug 783108 - Make paint tools draw in all open views

[Jehan Pagès <jehanp src gnome org>]

commit 2aa246f5e9e27d0fcb624dd66cf9ecc5a4e01f7a
Author: Richard McLean <programmer_ceds yahoo co uk>
Date:   Fri May 26 00:06:58 2017 +0100

    Bug 783108 - Make paint tools draw in all open views
    
    Committed with minor fixes by the reviewer (Jehan).

 app/tools/gimppainttool.c |   21 +++++++++++++++++++--
 1 files changed, 19 insertions(+), 2 deletions(-)
---
diff --git a/app/tools/gimppainttool.c b/app/tools/gimppainttool.c
index ab35f1b..31ad79d 100644
--- a/app/tools/gimppainttool.c
+++ b/app/tools/gimppainttool.c
@@ -24,6 +24,7 @@
 #include "libgimpmath/gimpmath.h"
 
 #include "tools-types.h"
+#include "core/gimp.h"
 
 #include "config/gimpdisplayconfig.h"
 
@@ -257,6 +258,7 @@ gimp_paint_tool_button_press (GimpTool            *tool,
   GimpCoords        curr_coords;
   gint              off_x, off_y;
   GError           *error = NULL;
+  GList            *list;
 
   if (gimp_color_tool_is_enabled (GIMP_COLOR_TOOL (tool)))
     {
@@ -364,7 +366,14 @@ gimp_paint_tool_button_press (GimpTool            *tool,
     }
 
   gimp_projection_flush_now (gimp_image_get_projection (image));
-  gimp_display_flush_now (display);
+
+  /* Update all views this image is in. */
+  for (list = gimp_get_display_iter (image->gimp);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_display_flush_now (GIMP_DISPLAY (list->data));
+    }
 
   gimp_draw_tool_start (draw_tool, display);
 }
@@ -429,6 +438,7 @@ gimp_paint_tool_motion (GimpTool         *tool,
   GimpDrawable     *drawable      = gimp_image_get_active_drawable (image);
   GimpCoords        curr_coords;
   gint              off_x, off_y;
+  GList            *list;
 
   GIMP_TOOL_CLASS (parent_class)->motion (tool, coords, time, state, display);
 
@@ -457,7 +467,14 @@ gimp_paint_tool_motion (GimpTool         *tool,
                                &curr_coords, time);
 
   gimp_projection_flush_now (gimp_image_get_projection (image));
-  gimp_display_flush_now (display);
+
+  /* Update all views this image is in. */
+  for (list = gimp_get_display_iter (image->gimp);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_display_flush_now (GIMP_DISPLAY (list->data));
+    }
 
   gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
 }