[gimp/metadata-browser] Remove more gdk_pointer_grab() where they are not strictly needed

[Roman Joost <romanofski src gnome org>]

commit 43ffd2d97231f024d730ff960e36e1cb1f7aed20
Author: Michael Natterer <mitch gimp org>
Date:   Sat Dec 10 21:51:05 2011 +0100

    Remove more gdk_pointer_grab() where they are not strictly needed
    
    and replace them by gtk_grab_add()/remove().

 app/widgets/gimpdasheditor.c     |    8 +++-----
 app/widgets/gimphistogramview.c  |    7 ++-----
 libgimpwidgets/gimpcolorselect.c |   18 ++++--------------
 libgimpwidgets/gimpoffsetarea.c  |   36 +++++++++++++++++++++---------------
 4 files changed, 30 insertions(+), 39 deletions(-)
---
diff --git a/app/widgets/gimpdasheditor.c b/app/widgets/gimpdasheditor.c
index c135348..f039b12 100644
--- a/app/widgets/gimpdasheditor.c
+++ b/app/widgets/gimpdasheditor.c
@@ -351,9 +351,8 @@ gimp_dash_editor_button_press (GtkWidget      *widget,
 
   if (bevent->button == 1 && bevent->type == GDK_BUTTON_PRESS)
     {
-      gdk_pointer_grab (gtk_widget_get_window (widget), FALSE,
-                        GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK,
-                        NULL, NULL, bevent->time);
+      gtk_grab_add (widget);
+
       index = dash_x_to_index (editor, bevent->x);
 
       editor->edit_mode = ! editor->segments [index];
@@ -375,8 +374,7 @@ gimp_dash_editor_button_release (GtkWidget      *widget,
 
   if (bevent->button == 1)
     {
-      gdk_display_pointer_ungrab (gtk_widget_get_display (GTK_WIDGET (editor)),
-                                  bevent->time);
+      gtk_grab_remove (widget);
 
       update_options_from_segments (editor);
     }
diff --git a/app/widgets/gimphistogramview.c b/app/widgets/gimphistogramview.c
index 6d14756..f3e8df1 100644
--- a/app/widgets/gimphistogramview.c
+++ b/app/widgets/gimphistogramview.c
@@ -528,9 +528,7 @@ gimp_histogram_view_button_press (GtkWidget      *widget,
       GtkAllocation allocation;
       gint          width;
 
-      gdk_pointer_grab (gtk_widget_get_window (widget), FALSE,
-                        GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK,
-                        NULL, NULL, bevent->time);
+      gtk_grab_add (widget);
 
       gtk_widget_get_allocation (widget, &allocation);
 
@@ -556,8 +554,7 @@ gimp_histogram_view_button_release (GtkWidget      *widget,
     {
       gint start, end;
 
-      gdk_display_pointer_ungrab (gtk_widget_get_display (GTK_WIDGET (view)),
-                                  bevent->time);
+      gtk_grab_remove (widget);
 
       start = view->start;
       end   = view->end;
diff --git a/libgimpwidgets/gimpcolorselect.c b/libgimpwidgets/gimpcolorselect.c
index 0056261..7f28f84 100644
--- a/libgimpwidgets/gimpcolorselect.c
+++ b/libgimpwidgets/gimpcolorselect.c
@@ -671,11 +671,7 @@ gimp_color_select_xy_events (GtkWidget       *widget,
         x = bevent->x;
         y = bevent->y;
 
-        gdk_pointer_grab (gtk_widget_get_window (select->xy_color), FALSE,
-                          GDK_POINTER_MOTION_HINT_MASK |
-                          GDK_BUTTON_MOTION_MASK       |
-                          GDK_BUTTON_RELEASE_MASK,
-                          NULL, NULL, bevent->time);
+        gtk_grab_add (widget);
         select->drag_mode = DRAG_XY;
       }
       break;
@@ -690,8 +686,7 @@ gimp_color_select_xy_events (GtkWidget       *widget,
         x = bevent->x;
         y = bevent->y;
 
-        gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
-                                    bevent->time);
+        gtk_grab_remove (widget);
         select->drag_mode = DRAG_NONE;
       }
       break;
@@ -793,11 +788,7 @@ gimp_color_select_z_events (GtkWidget       *widget,
 
         z = bevent->y;
 
-        gdk_pointer_grab (gtk_widget_get_window (select->z_color), FALSE,
-                          GDK_POINTER_MOTION_HINT_MASK |
-                          GDK_BUTTON_MOTION_MASK       |
-                          GDK_BUTTON_RELEASE_MASK,
-                          NULL, NULL, bevent->time);
+        gtk_grab_add (widget);
         select->drag_mode = DRAG_Z;
       }
       break;
@@ -811,8 +802,7 @@ gimp_color_select_z_events (GtkWidget       *widget,
 
         z = bevent->y;
 
-        gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
-                                    bevent->time);
+        gtk_grab_remove (widget);
         select->drag_mode = DRAG_NONE;
       }
       break;
diff --git a/libgimpwidgets/gimpoffsetarea.c b/libgimpwidgets/gimpoffsetarea.c
index a012751..8dc1d7c 100644
--- a/libgimpwidgets/gimpoffsetarea.c
+++ b/libgimpwidgets/gimpoffsetarea.c
@@ -100,7 +100,10 @@ gimp_offset_area_init (GimpOffsetArea *area)
   area->display_ratio_x = 1.0;
   area->display_ratio_y = 1.0;
 
-  gtk_widget_add_events (GTK_WIDGET (area), GDK_BUTTON_PRESS_MASK);
+  gtk_widget_add_events (GTK_WIDGET (area),
+                         GDK_BUTTON_PRESS_MASK   |
+                         GDK_BUTTON_RELEASE_MASK |
+                         GDK_BUTTON1_MOTION_MASK);
 }
 
 /**
@@ -353,15 +356,15 @@ gimp_offset_area_event (GtkWidget *widget,
   switch (event->type)
     {
     case GDK_BUTTON_PRESS:
-      gdk_pointer_grab (gtk_widget_get_window (widget), FALSE,
-                        (GDK_BUTTON1_MOTION_MASK |
-                         GDK_BUTTON_RELEASE_MASK),
-                        NULL, NULL, event->button.time);
-
-      orig_offset_x = area->offset_x;
-      orig_offset_y = area->offset_y;
-      start_x = event->button.x;
-      start_y = event->button.y;
+      if (event->button.button == 1)
+        {
+          gtk_grab_add (widget);
+
+          orig_offset_x = area->offset_x;
+          orig_offset_y = area->offset_y;
+          start_x = event->button.x;
+          start_y = event->button.y;
+        }
       break;
 
     case GDK_MOTION_NOTIFY:
@@ -381,16 +384,19 @@ gimp_offset_area_event (GtkWidget *widget,
       break;
 
     case GDK_BUTTON_RELEASE:
-      gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
-                                  event->button.time);
-      start_x = start_y = 0;
+      if (event->button.button == 1)
+        {
+          gtk_grab_remove (widget);
+
+          start_x = start_y = 0;
+        }
       break;
 
     default:
-      break;
+      return FALSE;
     }
 
-  return FALSE;
+  return TRUE;
 }
 
 static gboolean