2002-08-31 Rachel Hestilow <hestilow@ximian.com>

* glib/Idle.cs: Added.
	* gtk/Application.cs: Add EventsPending, RunIteration.

	* sample/TreeViewDemo.cs: Add a status dialog while
	populating tree.

svn path=/trunk/gtk-sharp/; revision=7164

ChangeLog

@@ -1,3 +1,11 @@
+2002-08-31  Rachel Hestilow  <hestilow@ximian.com>
+
+	* glib/Idle.cs: Added.
+	* gtk/Application.cs: Add EventsPending, RunIteration.
+	
+	* sample/TreeViewDemo.cs: Add a status dialog while
+	populating tree.
+	
 2002-08-31  Rachel Hestilow  <hestilow@ximian.com>
 
 	* generator/Method.cs: Re-enable "if null then new" behavior

glib/Idle.cs

@@ -0,0 +1,45 @@
+// GLib.Idle.cs - Idle class implementation
+//
+// Author: Mike Kestner <mkestner@speakeasy.net>
+//         Rachel Hestilow <hestilow@ximian.com>
+//
+// (c) 2002 Mike Kestner, Rachel Hestilow
+
+namespace GLib {
+
+	using System;
+	using System.Runtime.InteropServices;
+
+	/// <summary>
+	///	IdleHandler Delegate
+	/// </summary>
+	///
+	/// <remarks>
+	///	Delegate used for idle handlerss in the GLib main loop. Return
+	///	true to restart the idle.  Returning false clears the
+	///	idle.
+	/// </remarks>
+
+	public delegate bool IdleHandler ();
+
+	/// <summary>
+	///	Idle Class
+	/// </summary>
+	///
+	/// <remarks>
+	///	Allows the installation of Idle Handlers on the GLib main
+	///	loop.
+	/// </remarks>
+
+	public class Idle {
+
+		[DllImport("glib-2.0")]
+		static extern uint g_idle_add (IdleHandler d, IntPtr data);
+
+		public static uint Add (IdleHandler hndlr)
+		{
+			return g_idle_add (hndlr, IntPtr.Zero);
+		}
+	}
+}
+

gtk/Application.cs

@@ -64,6 +64,38 @@ namespace Gtk {
 			gtk_main ();
 		}
 
+		[DllImport("gtk-x11-2.0")]
+		static extern bool gtk_events_pending ();
+
+		/// <summary>
+		///	EventsPending Method
+		/// </summary>
+		/// 
+		/// <remarks>
+		///	Returns true if Gtk+ events are pending in the queue.	
+		/// </remarks>
+
+		public static bool EventsPending ()
+		{
+			return gtk_events_pending ();
+		}
+
+		[DllImport("gtk-x11-2.0")]
+		static extern void gtk_main_iteration ();
+
+		/// <summary>
+		///	RunIteration Method
+		/// </summary>
+		/// 
+		/// <remarks>
+		///	Runs a single iteration of the event loop.	
+		/// </remarks>
+
+		public static void RunIteration ()
+		{
+			gtk_main_iteration ();
+		}
+
 		[DllImport("gtk-x11-2.0")]
 		static extern void gtk_main_quit ();
 

sample/TreeViewDemo.cs

@@ -16,6 +16,8 @@ namespace GtkSamples {
 
 	public class TreeViewDemo {
 		private static TreeStore store = null;
+		private static Dialog dialog = null;
+		private static Label dialog_label = null;
 
 		private static void ProcessType (TreeIter parent, Type t)
 		{
@@ -36,8 +38,11 @@ namespace GtkSamples {
 		private static void ProcessAssembly (TreeIter parent, Assembly asm)
 		{
 			TreeIter iter = new TreeIter ();
+			string asm_name = asm.GetName ().Name;
 
 			foreach (Type t in asm.GetTypes ()) {
+				UpdateDialog ("Loading from {0}:\n{1}", asm_name, t.ToString ());
+
 				GLib.Value Name = new GLib.Value (t.Name);
 				GLib.Value Type = new GLib.Value (t.ToString ());
 
@@ -54,8 +59,6 @@ namespace GtkSamples {
 			if (store != null)
 				return;
 
-			Console.WriteLine ("Loading data from assemblies...");
-
 			store = new TreeStore ((int)TypeFundamentals.TypeString,
 					       (int)TypeFundamentals.TypeString);
 
@@ -66,6 +69,8 @@ namespace GtkSamples {
 				// stuff in some scary class.
 				if (asm.GetName ().Name == "mscorlib") continue;
 
+				UpdateDialog ("Loading {0}", asm.GetName ().Name);
+
 				GLib.Value Name = new GLib.Value (asm.GetName ().Name);
 				GLib.Value Type = new GLib.Value ("Assembly");
 
@@ -81,6 +86,15 @@ namespace GtkSamples {
 		{
 			Application.Init ();
 
+			Idle.Add (new IdleHandler (IdleCB));
+
+			Application.Run ();
+		}
+
+		public static bool IdleCB ()
+		{
+			PopulateStore ();
+
 			Window win = new Window ("TreeView demo");
 			win.DeleteEvent += new DeleteEventHandler (DeleteCB);
 			win.DefaultSize = new Size (640,480);
@@ -88,8 +102,6 @@ namespace GtkSamples {
 			ScrolledWindow sw = new ScrolledWindow ();
 			win.Add (sw);
 
-			PopulateStore ();
-
 			TreeView tv = new TreeView (store);
 			tv.HeadersVisible = true;
 
@@ -109,9 +121,11 @@ namespace GtkSamples {
 
 			sw.Add (tv);
 			
-			win.ShowAll ();
+			dialog.Destroy ();
+			dialog = null;
 
-			Application.Run ();
+			win.ShowAll ();
+			return false;
 		}
 
 		private static void DeleteCB (Object o, DeleteEventArgs args)
@@ -119,5 +133,39 @@ namespace GtkSamples {
 			Application.Quit ();
 			args.RetVal = true;
 		}
+
+		private static void UpdateDialog (string format, params object[] args)
+		{
+			string text = String.Format (format, args);
+
+			if (dialog == null)
+			{
+				dialog = new Dialog ();
+				dialog.Title = "Loading data from assemblies...";
+				dialog.AddButton (Stock.Cancel, 1);
+				dialog.Response += new ResponseHandler (ResponseCB);
+				dialog.DefaultSize = new Size (480, 100);
+					
+				VBox vbox = dialog.VBox;
+				HBox hbox = new HBox (false, 4);
+				vbox.PackStart (hbox, true, true, 0);
+				
+				Gtk.Image icon = new Gtk.Image (Stock.DialogInfo, IconSize.Dialog);
+				hbox.PackStart (icon, false, false, 0);
+				dialog_label = new Label (text);
+				hbox.PackStart (dialog_label, false, false, 0);
+				dialog.ShowAll ();
+			} else {
+				dialog_label.Text = text;
+				while (Application.EventsPending ())
+					Application.RunIteration ();
+	 		}
+		}
+
+		private static void ResponseCB (object obj, ResponseArgs args)
+		{
+			Application.Quit ();
+			System.Environment.Exit (0);
+		}
 	}
 }