[gnome-devel-docs] Vala samples: changed button example

[Tiffany Antopolski <antopolski src gnome org>]

commit 3ae1ecaa2104c19ee02e36fea54ddc167451ebec
Author: Tiffany Antopolski <tiffany antopolski gmail com>
Date:   Sat Apr 21 22:21:11 2012 -0400

    Vala samples: changed button example
    
    Updated the example to use GtkApplicationWindow

 platform-demos/C/button.vala.page    |   56 ++++++++++++++++------------------
 platform-demos/C/media/button.png    |  Bin 5122 -> 5789 bytes
 platform-demos/C/samples/button.vala |   52 ++++++++++++++-----------------
 3 files changed, 50 insertions(+), 58 deletions(-)
---
diff --git a/platform-demos/C/button.vala.page b/platform-demos/C/button.vala.page
index b577883..b013d69 100644
--- a/platform-demos/C/button.vala.page
+++ b/platform-demos/C/button.vala.page
@@ -17,49 +17,45 @@
   <title>Button widget</title>
 
   <media type="image" mime="image/png" src="media/button.png"/>
-  <p>A button widget connected to stdout.printf (), and a modal window.</p>
+  <p>A button widget connected to a simple callback function.</p>
 
       <code mime="text/x-vala" style="numbered"><![CDATA[
-/*callback for the "clicked" signal.*/
-void button_clicked_cb () {
-	stdout.printf ("You clicked the button!\n");
-	//TODO: add a modal window
-}
-
-int main (string[] args) {
-
-	Gtk.init (ref args);
+public class MyWindow : Gtk.ApplicationWindow {
+	void reverse_label (Gtk.Button button) {
+		button.label = button.label.reverse ();
+	}
 
-	var window = new Gtk.Window ();
-	window.title = "GNOME Button";
-	window.set_default_size (250,50);
+	internal MyWindow (MyApplication app) {
+		Object (application: app, title: "GNOME Button");
 
-	var button = new Gtk.Button.with_label ("Click Me");
-	window.add (button);
+		var button = new Gtk.Button.with_label ("Click Me");
+		button.clicked.connect (reverse_label);
+                button.show ();
 
-	window.window_position = Gtk.WindowPosition.CENTER;
+                this.window_position = Gtk.WindowPosition.CENTER;
+                this.set_default_size (250,50);
+		this.add (button);
 
-	/* The "clicked" signal is emitted when the
-	   button is clicked.  The signal is connected to
-	   the button_clicked_cb method defined above.*/
-	button.clicked.connect (button_clicked_cb);
+	}
+}
 
-	/*The "destroy" signal is emitted when the x
-	  in the top right of the window is clicked.
-	  The destroy signal is connected to the
-	  main_quit method, which destroys the window
-	  and exits the program.*/
-	window.destroy.connect (Gtk.main_quit);
+public class MyApplication : Gtk.Application {
+	protected override void activate () {
+		new MyWindow (this).show ();
+	}
 
-	window.show_all ();
+	internal MyApplication () {
+		Object (application_id: "org.example.MyApplication");
+	}
+}
 
-	Gtk.main ();
-	return 0;
+public int main (string[] args) {
+	return new MyApplication ().run (args);
 }
 ]]></code>
 <p>
   In this sample we used the following:
-  <link xref="window.vala">Gtk.Window</link>,
+  <link xref="GtkApplicationWindow.vala">Gtk.ApplicationWindow</link>,
   <link href="http://www.valadoc.org/#!api=gtk+-2.0/Gtk.Button";>Gtk.Button</link>
 </p>
 </page>
diff --git a/platform-demos/C/media/button.png b/platform-demos/C/media/button.png
index e1993a9..d40396a 100644
Binary files a/platform-demos/C/media/button.png and b/platform-demos/C/media/button.png differ
diff --git a/platform-demos/C/samples/button.vala b/platform-demos/C/samples/button.vala
index 060fb72..184969e 100644
--- a/platform-demos/C/samples/button.vala
+++ b/platform-demos/C/samples/button.vala
@@ -1,36 +1,32 @@
-/*callback for the "clicked" signal.*/
-void button_clicked_cb () {
-	stdout.printf ("You clicked the button!\n");
-	//TODO: add a modal window
-}
-
-int main (string[] args) {
-
-	Gtk.init (ref args);
+public class MyWindow : Gtk.ApplicationWindow {
+	void reverse_label (Gtk.Button button) {
+		button.label = button.label.reverse ();
+	}
 
-	var window = new Gtk.Window ();
-	window.title = "GNOME Button";
-	window.set_default_size (250,50);
+	internal MyWindow (MyApplication app) {
+		Object (application: app, title: "GNOME Button");
 
-	var button = new Gtk.Button.with_label ("Click Me");
-	window.add (button);
+		var button = new Gtk.Button.with_label ("Click Me");
+		button.clicked.connect (reverse_label);
+                button.show ();
 
-	window.window_position = Gtk.WindowPosition.CENTER;
+                this.window_position = Gtk.WindowPosition.CENTER;
+                this.set_default_size (250,50);
+		this.add (button);
 
-	/* The "clicked" signal is emitted when the
-	   button is clicked.  The signal is connected to
-	   the button_clicked_cb method defined above.*/
-	button.clicked.connect (button_clicked_cb);
+	}
+}
 
-	/*The "destroy" signal is emitted when the x
-	  in the top right of the window is clicked.
-	  The destroy signal is connected to the
-	  main_quit method, which destroys the window
-	  and exits the program.*/
-	window.destroy.connect (Gtk.main_quit);
+public class MyApplication : Gtk.Application {
+	protected override void activate () {
+		new MyWindow (this).show ();
+	}
 
-	window.show_all ();
+	internal MyApplication () {
+		Object (application_id: "org.example.MyApplication");
+	}
+}
 
-	Gtk.main ();
-	return 0;
+public int main (string[] args) {
+	return new MyApplication ().run (args);
 }