Legion: Build your own virtual super computer with Silverlight

/*
<File>
	<Copyright>Copyright © 2007, Daniel Vaughan. All rights reserved.</Copyright>
	<License see="prj:///Documentation/License.txt"/>
	<Owner Name="Daniel Vaughan" Email="dbvaughan@gmail.com"/>
	<CreationDate>2007-12-14 00:42:47Z</CreationDate>
	<LastSubmissionDate>$Date: $</LastSubmissionDate>
	<Version>$Revision: $</Version>
</File>
*/

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Orpius.GridComputing.Controls
{
	/// <summary>
	/// A glass button.
	/// </summary>
	public class ButtonControl : Control
	{
		readonly FrameworkElement root;
		readonly Canvas rootCanvas;
		readonly Rectangle rectangleColor;
		readonly Rectangle rectangleShine;
		readonly Rectangle hitShape;
		readonly Storyboard mouseOverStoryboard;
		readonly Storyboard mouseOutStoryboard;
		readonly TextBlock textBlock;

		/// <summary>
		/// The padding for the text within the control.
		/// </summary>
		const int padding = 5;

		/// <summary>
		/// Set when the control is loaded, and used
		/// to determine whether the control should be layed
		/// out when the text changes.
		/// </summary>
		bool loaded;

		/// <summary>
		/// Gets or sets the text on the button.
		/// </summary>
		/// <value>The text on the button's face.</value>
		public string Text
		{
			get
			{
				return textBlock.Text;
			}
			set
			{
				textBlock.Text = value;
				LayoutControl();
			}
		}

		#region Click event
		event EventHandler<MouseEventArgs> click;

		/// <summary>
		/// Occurs when the button is clicked.
		/// </summary>
		public event EventHandler<MouseEventArgs> Click
		{
			add
			{
				click += value;
			}
			remove
			{
				click -= value;
			}
		}

		protected void OnClick(MouseEventArgs e)
		{
			if (click != null)
			{
				click(this, e);
			}
		}
		#endregion
		public ButtonControl()
		{
			System.IO.Stream s = this.GetType().Assembly.GetManifestResourceStream("Orpius.GridComputing.Controls.ButtonControl.xaml");
			root = InitializeFromXaml(new System.IO.StreamReader(s).ReadToEnd());
			rootCanvas = (Canvas)root.FindName("GlassButton");
			rectangleColor = (Rectangle)root.FindName("rectangleColor");
			rectangleShine = (Rectangle)root.FindName("rectangleShine");
			hitShape = (Rectangle)rootCanvas.FindName("HitShape");
			textBlock = (TextBlock)rootCanvas.FindName("Text");
			textBlock.Text = string.Empty;

			mouseOverStoryboard = (Storyboard)rootCanvas.FindName("MouseOver");
			mouseOutStoryboard = (Storyboard)rootCanvas.FindName("MouseOut");

			hitShape.MouseEnter += new MouseEventHandler(hitShape_MouseEnter);
			hitShape.MouseLeave += new EventHandler(hitShape_MouseLeave);
			hitShape.MouseLeftButtonUp += new MouseEventHandler(hitShape_MouseLeftButtonUp);
			Loaded += new EventHandler(ButtonControl_Loaded);
		}

		void ButtonControl_Loaded(object sender, EventArgs e)
		{
			loaded = true;
			LayoutControl();
		}

		void hitShape_MouseLeftButtonUp(object sender, MouseEventArgs e)
		{
			OnClick(e);
		}

		void hitShape_MouseLeave(object sender, EventArgs e)
		{
			mouseOutStoryboard.Begin();
		}

		void hitShape_MouseEnter(object sender, MouseEventArgs e)
		{
			mouseOverStoryboard.Begin();
		}

		void LayoutControl()
		{
			if (!loaded)
			{
				return;
			}
			rectangleColor.Width = hitShape.Width = Width;
			rectangleColor.Height = hitShape.Height = Height;
			rectangleShine.Height = Height / 2.5;

			if (Width < 2 * padding)
			{
				return;
			}
			textBlock.Width = Width - 2 * padding;
			double textWidth = textBlock.Width;
			double textWidthActual = textBlock.ActualWidth;
			double textLeft = (Width - textWidthActual) / 2;
			textBlock.SetValue(Canvas.LeftProperty, textLeft);

			rectangleShine.Width = Width - 2 * padding;
			double shineLeft = padding;
			rectangleShine.SetValue(Canvas.LeftProperty, shineLeft);
		}
	}
}