[gnome-games] ui: Add KeyboardTester

[Adrien Plazas <aplazas src gnome org>]

commit a8e728dbc89d31fed98a1e19189f12514efaa1c7
Author: theawless <theawless gmail com>
Date:   Mon Feb 19 18:58:13 2018 +0530

    ui: Add KeyboardTester
    
    This allows the user to test their keyboard by highlighting GamepadView
    widget on user inputs.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=780755

 data/Makefile.am                   |  1 +
 data/org.gnome.Games.gresource.xml |  1 +
 data/ui/keyboard-tester.ui         | 18 ++++++++++++
 src/Makefile.am                    |  1 +
 src/ui/keyboard-tester.vala        | 60 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 81 insertions(+)
---
diff --git a/data/Makefile.am b/data/Makefile.am
index dc36d38..3d0915a 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -40,6 +40,7 @@ EXTRA_DIST = \
        ui/gamepad-mapper.ui \
        ui/gamepad-tester.ui \
        ui/game-icon-view.ui \
+       ui/keyboard-tester.ui \
        ui/media-menu-button.ui \
        ui/media-selector.ui \
        ui/preferences-page-controllers.ui \
diff --git a/data/org.gnome.Games.gresource.xml b/data/org.gnome.Games.gresource.xml
index 1387e5f..e9f252e 100644
--- a/data/org.gnome.Games.gresource.xml
+++ b/data/org.gnome.Games.gresource.xml
@@ -19,6 +19,7 @@
     <file preprocess="xml-stripblanks">ui/gamepad-mapper.ui</file>
     <file preprocess="xml-stripblanks">ui/gamepad-tester.ui</file>
     <file preprocess="xml-stripblanks">ui/game-icon-view.ui</file>
+    <file preprocess="xml-stripblanks">ui/keyboard-tester.ui</file>
     <file preprocess="xml-stripblanks">ui/media-menu-button.ui</file>
     <file preprocess="xml-stripblanks">ui/media-selector.ui</file>
     <file preprocess="xml-stripblanks">ui/preferences-page-controllers.ui</file>
diff --git a/data/ui/keyboard-tester.ui b/data/ui/keyboard-tester.ui
new file mode 100644
index 0000000..4320ee7
--- /dev/null
+++ b/data/ui/keyboard-tester.ui
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <template class="GamesKeyboardTester" parent="GtkBox">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="orientation">vertical</property>
+    <child>
+      <object class="GamesGamepadView" id="gamepad_view">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="halign">fill</property>
+        <property name="valign">fill</property>
+        <property name="hexpand">True</property>
+        <property name="vexpand">True</property>
+      </object>
+    </child>
+  </template>
+</interface>
diff --git a/src/Makefile.am b/src/Makefile.am
index 65e3328..49bbeec 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -127,6 +127,7 @@ gnome_games_SOURCES = \
        ui/game-icon-view.vala \
        ui/game-thumbnail.vala \
        ui/gamepad-view-configuration.vala \
+       ui/keyboard-tester.vala \
        ui/media-selector.vala \
        ui/media-menu-button.vala \
        ui/preferences-page.vala \
diff --git a/src/ui/keyboard-tester.vala b/src/ui/keyboard-tester.vala
new file mode 100644
index 0000000..932c900
--- /dev/null
+++ b/src/ui/keyboard-tester.vala
@@ -0,0 +1,60 @@
+// This file is part of GNOME Games. License: GPL-3.0+.
+
+[GtkTemplate (ui = "/org/gnome/Games/ui/keyboard-tester.ui")]
+private class Games.KeyboardTester : Gtk.Box {
+       [GtkChild]
+       private GamepadView gamepad_view;
+
+       public Retro.KeyJoypadMapping mapping { set; get; }
+
+       public KeyboardTester (GamepadViewConfiguration configuration) {
+               try {
+                       gamepad_view.set_configuration (configuration);
+               }
+               catch (Error e) {
+                       critical ("Could not set up gamepad view: %s", e.message);
+               }
+       }
+
+       public void start () {
+               gamepad_view.reset ();
+               connect_to_keyboard ();
+       }
+
+       public void stop () {
+               disconnect_from_keyboard ();
+       }
+
+       private void connect_to_keyboard () {
+               var window = get_toplevel ();
+               window.key_press_event.connect (on_key_press_event);
+               window.key_release_event.connect (on_key_release_event);
+       }
+
+       private void disconnect_from_keyboard () {
+               var window = get_toplevel ();
+               window.key_press_event.disconnect (on_key_press_event);
+               window.key_release_event.disconnect (on_key_release_event);
+       }
+
+       private bool on_key_press_event (Gdk.EventKey key) {
+               update_gamepad_view (key, true);
+
+               return true;
+       }
+
+       private bool on_key_release_event (Gdk.EventKey key) {
+               update_gamepad_view (key, false);
+
+               return true;
+       }
+
+       private void update_gamepad_view (Gdk.EventKey key, bool highlight) {
+               for (Retro.JoypadId joypad_id = 0; joypad_id < Retro.JoypadId.COUNT; joypad_id += 1) {
+                       if (mapping.get_button_key (joypad_id) == key.hardware_keycode) {
+                               var code = joypad_id.to_button_code ();
+                               gamepad_view.highlight ({ EventCode.EV_KEY, code }, highlight);
+                       }
+               }
+       }
+}