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trunk/src/Icarus/LUCIE/HighlightGrid.cs

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+// $Author: asskoala $
+// $Date: 2005/12/11 21:07:21 $
+// $Revision: 1.1 $
+
+using System;
+using System.Drawing;
+
+using Icarus.Graphics.Animation;
+
+namespace Icarus.LUCIE
+{
+	/// <summary>
+	/// This is just like a component grid, except it also can highlight an item with a special image.
+	/// </summary>
+	public class HighlightGrid : ComponentGrid
+	{
+		/// <summary>
+		/// The animation used to highlight the selected component.
+		/// </summary>
+		private FramesetAnimation mHighlightAnimation;
+
+		/// <summary>
+		/// Which component is highlighted.
+		/// </summary>
+		private AbstractComponent mHighlightedComponent;
+
+		/// <summary>
+		/// The position of the highlight animation.
+		/// </summary>
+		private Point mHighlightPosition = new Point(0, 0);
+
+		/// <summary>
+		/// Initializes the highlight grid.
+		/// </summary>
+		/// <param name="l">The layout of the components.</param>
+		/// <param name="highlightAnimation">The animation used to highlight the selected item.</param>
+		public HighlightGrid(Layout l, FramesetAnimation highlightAnimation) : base(l)
+		{
+			this.HighlightAnimation = highlightAnimation;
+		}
+
+		/// <summary>
+		/// The animation used to highlight the selected component.
+		/// </summary>
+		public FramesetAnimation HighlightAnimation
+		{
+			get { return this.mHighlightAnimation; }
+			set { this.mHighlightAnimation = value; }
+		}
+
+		/// <summary>
+		/// Which child should be highlighted?
+		/// </summary>
+		public AbstractComponent HighlightedComponent
+		{
+			get { return this.mHighlightedComponent; }
+			set
+			{
+				this.mHighlightedComponent = value;
+				this.UpdateHighlight();
+			}
+		}
+
+		/// <summary>
+		/// Updates the position of the highlight depending on which component is currently selected.
+		/// </summary>
+		private void UpdateHighlight()
+		{
+			if (this.HighlightedComponent != null)
+			{
+				//Find the center of the component:
+				switch (this.Layout)
+				{
+					case Layout.Column:
+						mHighlightPosition.X = this.Size.Width / 2;
+						mHighlightPosition.Y = this.HighlightedComponent.Location.Y + this.HighlightedComponent.Size.Height / 2;
+						break;
+						
+					case Layout.Row:
+						mHighlightPosition.X = this.HighlightedComponent.Location.X + this.HighlightedComponent.Size.Width / 2;
+						mHighlightPosition.Y = this.Size.Height / 2;
+						break;
+				}
+			}
+		}
+
+		protected override void RenderSelf(Rectangle coordinates, IRenderParameters parameters)
+		{
+			base.RenderSelf(coordinates, parameters);
+
+			if (this.HighlightAnimation != null && this.HighlightedComponent != null)
+			{
+				coordinates.Offset(mHighlightPosition);
+				this.HighlightAnimation.CurrentFrame.Render(coordinates, parameters);
+				this.HighlightAnimation.update(1);
+				coordinates.Offset(-mHighlightPosition.X, -mHighlightPosition.Y);
+			}
+		}
+	}
+}