add / link about_dialog to gui (#22)

.gitignore

@@ -1,4 +1,4 @@
 /bin/SamRewritten
 /bin/samrewritten
 /glade/*.glade~
-/glade*.glade#
+/glade/*.glade#

glade/main_window.glade

@@ -26,6 +26,48 @@ Author: Paul Combaldieu
   <!-- interface-license-type lgplv3 -->
   <!-- interface-name SamRewritten -->
   <!-- interface-authors Paul Combaldieu -->
+  <object class="GtkAboutDialog" id="about_dialog">
+    <property name="can_focus">False</property>
+    <property name="icon">../assets/icon.png</property>
+    <property name="type_hint">dialog</property>
+    <property name="program_name">SamRewritten</property>
+    <property name="version">A Steam Achievement Manager For Linux</property>
+    <property name="comments" translatable="yes">Contribute to us on GitHub!</property>
+    <property name="website">https://github.com/PaulCombal/SamRewritten</property>
+    <property name="website_label" translatable="yes">Source Code</property>
+    <property name="authors">Paul Combal (PaulCombal)
+William Pierce (wgpierce)
+telans (telans)</property>
+    <property name="artists">Rejedai (rejedai)</property>
+    <property name="logo">../assets/icon.png</property>
+    <property name="license_type">gpl-3-0</property>
+    <signal name="delete-event" handler="on_about_dialog_close_button_clicked" swapped="no"/>
+    <signal name="response" handler="on_about_dialog_close_button_clicked" swapped="no"/>
+    <child type="titlebar">
+      <placeholder/>
+    </child>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <child internal-child="action_area">
+          <object class="GtkButtonBox">
+            <property name="can_focus">False</property>
+            <property name="layout_style">end</property>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <placeholder/>
+        </child>
+      </object>
+    </child>
+  </object>
   <object class="GtkBox" id="game_placeholder">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -94,6 +136,7 @@ He's pretty confident they won't take much longer to arrive, but is also wrong m
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
             <property name="text" translatable="yes">About</property>
+            <signal name="clicked" handler="on_about_button_clicked" swapped="no"/>
           </object>
           <packing>
             <property name="expand">False</property>

src/gui/MainPickerWindow.cpp

@@ -10,6 +10,7 @@
 MainPickerWindow::MainPickerWindow() 
 : 
 m_main_window(nullptr),
+m_about_dialog(nullptr),
 m_back_button(nullptr),
 m_game_list(nullptr),
 m_stats_list(nullptr),
@@ -26,6 +27,7 @@ m_stats_list_view(nullptr)
     m_game_list = GTK_LIST_BOX(gtk_builder_get_object(m_builder, "game_list"));
     m_stats_list = GTK_LIST_BOX(gtk_builder_get_object(m_builder, "stats_list"));
     m_main_window = GTK_WIDGET(gtk_builder_get_object(m_builder, "main_window"));
+    m_about_dialog = GTK_WIDGET(gtk_builder_get_object(m_builder, "about_dialog"));
     m_main_stack = GTK_STACK(gtk_builder_get_object(m_builder, "main_stack"));
     m_game_list_view = GTK_SCROLLED_WINDOW(gtk_builder_get_object(m_builder, "game_list_view"));
     m_stats_list_view = GTK_SCROLLED_WINDOW(gtk_builder_get_object(m_builder, "stats_list_view"));
@@ -261,6 +263,16 @@ MainPickerWindow::switch_to_games_page() {
 }
 // => switch_to_games_page
 
+void
+MainPickerWindow::show_about_dialog() {
+    gtk_widget_show(GTK_WIDGET(m_about_dialog));
+}
+
+void
+MainPickerWindow::hide_about_dialog() {
+    gtk_widget_hide_on_delete(GTK_WIDGET(m_about_dialog));
+}
+
 void
 MainPickerWindow::show() {
     gtk_widget_show( get_main_window() );

src/gui/MainPickerWindow.h

@@ -99,6 +99,16 @@ public:
      */
     void switch_to_games_page();
 
+    /**
+     * Opens the About Dialog on top of the current page
+     */
+    void show_about_dialog();
+
+    /**
+     * Closes the About Dialog without destroying it for future calling
+     */
+    void hide_about_dialog();
+
     /**
      * Getter for the main window
      */
@@ -129,6 +139,7 @@ public:
 
 private:
     GtkWidget *m_main_window;
+    GtkWidget *m_about_dialog;
     GtkButton *m_back_button;
     GtkButton *m_store_button;
     GtkListBox *m_game_list;

src/gui/gtk_callbacks.cpp

@@ -197,6 +197,15 @@ extern "C"
     }
     // => on_main_window_show
 
+    void
+    on_about_button_clicked() {
+        g_main_gui->show_about_dialog();
+    }
+
+    void
+    on_about_dialog_close_button_clicked() {
+        g_main_gui->hide_about_dialog();
+    }
 
     void
     on_search_changed(GtkWidget* search_widget) {

src/gui/gtk_callbacks.h

@@ -64,6 +64,12 @@ extern "C"
     void 
     on_main_window_show();
 
+    void
+    on_about_button_clicked();
+
+    void
+    on_about_dialog_close_button_clicked ();
+
     void
     on_search_changed(GtkWidget* search_widget);