[gnome-photos/wip/rishi/zoom: 3/4] application, help-overlay: Add keyboard shortcuts for zoom-in/out

[Debarshi Ray <debarshir src gnome org>]

commit 5dbb4baaee68df9f85fd2da7b5e74731f7127fce
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Mar 29 11:04:15 2017 +0200

    application, help-overlay: Add keyboard shortcuts for zoom-in/out

 src/photos-application.c   |    4 ++++
 src/photos-help-overlay.ui |   14 ++++++++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-application.c b/src/photos-application.c
index 3ab889c..fb74d8a 100644
--- a/src/photos-application.c
+++ b/src/photos-application.c
@@ -1666,6 +1666,8 @@ photos_application_startup (GApplication *application)
   const gchar *save_accels[2] = {"<Primary>x", NULL};
   const gchar *search_accels[2] = {"<Primary>f", NULL};
   const gchar *select_all_accels[2] = {"<Primary>a", NULL};
+  const gchar *zoom_in_accels[3] = {"<Primary>plus", "<Primary>equal", NULL};
+  const gchar *zoom_out_accels[2] = {"<Primary>minus", NULL};
 
   G_APPLICATION_CLASS (photos_application_parent_class)->startup (application);
 
@@ -1902,6 +1904,8 @@ photos_application_startup (GApplication *application)
   gtk_application_set_accels_for_action (GTK_APPLICATION (self), "app.save-current", save_accels);
   gtk_application_set_accels_for_action (GTK_APPLICATION (self), "app.search", search_accels);
   gtk_application_set_accels_for_action (GTK_APPLICATION (self), "app.select-all", select_all_accels);
+  gtk_application_set_accels_for_action (GTK_APPLICATION (self), "app.zoom-in", zoom_in_accels);
+  gtk_application_set_accels_for_action (GTK_APPLICATION (self), "app.zoom-out", zoom_out_accels);
 
   g_signal_connect_swapped (self->state->item_mngr,
                             "load-finished",
diff --git a/src/photos-help-overlay.ui b/src/photos-help-overlay.ui
index 5f00de8..69208e5 100644
--- a/src/photos-help-overlay.ui
+++ b/src/photos-help-overlay.ui
@@ -146,6 +146,20 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
+                <property name="title" translatable="yes" context="shortcut window">Zoom in</property>
+                <property name="accelerator">&lt;Primary&gt;plus</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="title" translatable="yes" context="shortcut window">Zoom out</property>
+                <property name="accelerator">&lt;Primary&gt;minus</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
                 <property name="title" translatable="yes" context="shortcut window">Delete</property>
                 <property name="accelerator">Delete</property>
               </object>