[gnome-control-center/add-locate-pointer] universal-access: Add "Locate Pointer" option

[Felipe Borges <felipeborges src gnome org>]

commit 44b463935dc1ab073ed7a9da35d75c4a47b2b246
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Jul 29 14:33:50 2019 +0200

    universal-access: Add "Locate Pointer" option
    
    Since [0] and [1], "locate pointer" is now in Mutter and works
    well under Wayland and X11.
    
    Once activated, the mouse pointer can be located on the screen
    by pressing the Ctrl key. Pressing Ctrl will cause an animation
    to appear briefly at the location of your pointer.
    
    [0] https://gitlab.gnome.org/GNOME/mutter/merge_requests/453
    [1] https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/413
    
    Fixes #586

 panels/universal-access/cc-ua-panel.c  |  7 +++++
 panels/universal-access/cc-ua-panel.ui | 47 ++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)
---
diff --git a/panels/universal-access/cc-ua-panel.c b/panels/universal-access/cc-ua-panel.c
index ef55c5486..d5eeb6aac 100644
--- a/panels/universal-access/cc-ua-panel.c
+++ b/panels/universal-access/cc-ua-panel.c
@@ -49,6 +49,7 @@
 #define KEY_CURSOR_BLINKING          "cursor-blink"
 #define KEY_CURSOR_BLINKING_TIME     "cursor-blink-time"
 #define KEY_MOUSE_CURSOR_SIZE        "cursor-size"
+#define KEY_LOCATE_POINTER           "locate-pointer"
 
 /* application settings */
 #define APPLICATION_SETTINGS         "org.gnome.desktop.a11y.applications"
@@ -111,6 +112,7 @@ struct _CcUaPanel
   GtkWidget *list_seeing;
   GtkWidget *list_typing;
   GtkWidget *mouse_keys_switch;
+  GtkWidget *locate_pointer_switch;
   GtkWidget *pointing_dialog;
   GtkWidget *pointing_dwell_delay_box;
   GtkWidget *pointing_dwell_delay_scale;
@@ -251,6 +253,7 @@ cc_ua_panel_class_init (CcUaPanelClass *klass)
   gtk_widget_class_bind_template_child (widget_class, CcUaPanel, list_seeing);
   gtk_widget_class_bind_template_child (widget_class, CcUaPanel, list_typing);
   gtk_widget_class_bind_template_child (widget_class, CcUaPanel, mouse_keys_switch);
+  gtk_widget_class_bind_template_child (widget_class, CcUaPanel, locate_pointer_switch);
   gtk_widget_class_bind_template_child (widget_class, CcUaPanel, pointing_dialog);
   gtk_widget_class_bind_template_child (widget_class, CcUaPanel, pointing_dwell_delay_box);
   gtk_widget_class_bind_template_child (widget_class, CcUaPanel, pointing_dwell_delay_scale);
@@ -1050,6 +1053,10 @@ cc_ua_panel_init_mouse (CcUaPanel *self)
                    self->mouse_keys_switch, "active",
                    G_SETTINGS_BIND_DEFAULT);
 
+  g_settings_bind (self->interface_settings, KEY_LOCATE_POINTER,
+                   self->locate_pointer_switch, "active",
+                   G_SETTINGS_BIND_DEFAULT);
+
   g_signal_connect (self->mouse_settings, "changed",
                     G_CALLBACK (update_click_assist_label), self);
   update_click_assist_label (self->mouse_settings, NULL, self);
diff --git a/panels/universal-access/cc-ua-panel.ui b/panels/universal-access/cc-ua-panel.ui
index a7cbac44d..46bc93198 100644
--- a/panels/universal-access/cc-ua-panel.ui
+++ b/panels/universal-access/cc-ua-panel.ui
@@ -881,6 +881,53 @@
                                         </child>
                                       </object>
                                     </child>
+                                    <child>
+                                      <object class="GtkListBoxRow" id="row_locate_pointer">
+                                        <property name="visible">True</property>
+                                        <property name="can_focus">True</property>
+                                        <property name="selectable">False</property>
+                                        <property name="activatable">False</property>
+                                        <child>
+                                          <object class="GtkBox" id="box_locate_pointer">
+                                            <property name="visible">True</property>
+                                            <child>
+                                              <object class="GtkLabel" id="heading_locate_pointer">
+                                                <property name="visible">True</property>
+                                                <property name="can_focus">False</property>
+                                                <property name="margin_start">12</property>
+                                                <property name="margin_end">12</property>
+                                                <property name="margin_top">12</property>
+                                                <property name="margin_bottom">12</property>
+                                                <property name="xalign">0</property>
+                                                <property name="label" translatable="yes">_Locate 
Pointer</property>
+                                                <property name="use_underline">True</property>
+                                                <property 
name="mnemonic_widget">locate_pointer_switch</property>
+                                              </object>
+                                              <packing>
+                                                <property name="expand">True</property>
+                                                <property name="fill">True</property>
+                                                <property name="position">0</property>
+                                              </packing>
+                                            </child>
+                                            <child>
+                                              <object class="GtkSwitch" id="locate_pointer_switch">
+                                                <property name="visible">True</property>
+                                                <property name="can_focus">True</property>
+                                                <property name="margin_start">12</property>
+                                                <property name="margin_end">12</property>
+                                                <property name="margin_top">12</property>
+                                                <property name="margin_bottom">12</property>
+                                              </object>
+                                              <packing>
+                                                <property name="expand">False</property>
+                                                <property name="fill">True</property>
+                                                <property name="position">1</property>
+                                              </packing>
+                                            </child>
+                                          </object>
+                                        </child>
+                                      </object>
+                                    </child>
                                     <child>
                                       <object class="GtkListBoxRow" id="row_click_assist">
                                         <property name="visible">True</property>