[gedit/wip/printing-enhancements] print-preview: grab focus to the layout after a toolbar action

[Sébastien Wilmet <swilmet src gnome org>]

commit 4d69e8578bfc76453175f6cba9428737da30553f
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Jun 28 15:41:31 2015 +0200

    print-preview: grab focus to the layout after a toolbar action
    
    The key-press-events and scroll-events are handled on the GtkLayout.
    After activating a toolbar item, grab the focus to the layout, so the
    keyboard shortcuts still work.

 gedit/gedit-print-preview.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/gedit/gedit-print-preview.c b/gedit/gedit-print-preview.c
index 454d4ee..537f553 100644
--- a/gedit/gedit-print-preview.c
+++ b/gedit/gedit-print-preview.c
@@ -52,6 +52,13 @@ struct _GeditPrintPreview
        GtkButton *zoom_out_button;
        GtkButton *close_button;
 
+       /* The GtkLayout is where the pages are drawn. The layout should have
+        * the focus, because key-press-events and scroll-events are handled on
+        * the layout. It is AFAIK not easily possible to handle those events on
+        * the GeditPrintPreview itself because when a toolbar item has the
+        * focus, some key presses (like the arrows) moves the focus to a
+        * sibling toolbar item instead.
+        */
        GtkLayout *layout;
 
        /* real size of the page in inches */
@@ -292,6 +299,8 @@ prev_button_clicked (GtkWidget         *button,
 
        goto_page (preview, MAX (page, 0));
 
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
+
        gdk_event_free (event);
 }
 
@@ -315,6 +324,8 @@ next_button_clicked (GtkWidget         *button,
 
        goto_page (preview, MIN (page, preview->n_pages - 1));
 
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
+
        gdk_event_free (event);
 }
 
@@ -384,6 +395,7 @@ on_1x1_clicked (GtkMenuItem       *item,
 {
        preview->n_columns = 1;
        update_layout_size (preview);
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
 }
 
 static void
@@ -392,6 +404,7 @@ on_1x2_clicked (GtkMenuItem       *item,
 {
        preview->n_columns = 2;
        set_zoom_fit_to_size (preview);
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
 }
 
 static void
@@ -428,6 +441,7 @@ zoom_one_button_clicked (GtkWidget         *button,
                         GeditPrintPreview *preview)
 {
        set_zoom_factor (preview, 1);
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
 }
 
 static void
@@ -435,6 +449,7 @@ zoom_fit_button_clicked (GtkWidget         *button,
                         GeditPrintPreview *preview)
 {
        set_zoom_fit_to_size (preview);
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
 }
 
 static void
@@ -442,6 +457,7 @@ zoom_in_button_clicked (GtkWidget         *button,
                        GeditPrintPreview *preview)
 {
        zoom_in (preview);
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
 }
 
 static void
@@ -449,6 +465,7 @@ zoom_out_button_clicked (GtkWidget         *button,
                         GeditPrintPreview *preview)
 {
        zoom_out (preview);
+       gtk_widget_grab_focus (GTK_WIDGET (preview->layout));
 }
 
 static void