1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/External/Aga.Controls/Tree/NodeControls/ExpandingIcon.cs	Sun May 27 15:16:19 2012 +0000
     1.3 @@ -0,0 +1,83 @@
     1.4 +using System;
     1.5 +using System.Collections.Generic;
     1.6 +using System.Text;
     1.7 +using System.Drawing;
     1.8 +using System.Threading;
     1.9 +using System.Windows.Forms;
    1.10 +
    1.11 +namespace Aga.Controls.Tree.NodeControls
    1.12 +{
    1.13 +	/// <summary>
    1.14 +	/// Displays an animated icon for those nodes, who are in expanding state. 
    1.15 +	/// Parent TreeView must have AsyncExpanding property set to true.
    1.16 +	/// </summary>
    1.17 +	public class ExpandingIcon: NodeControl
    1.18 +	{
    1.19 +		private static GifDecoder _gif = ResourceHelper.LoadingIcon;
    1.20 +		private static int _index = 0;
    1.21 +		private static volatile Thread _animatingThread;
    1.22 +        private static object _lock = new object();
    1.23 +
    1.24 +		public override Size MeasureSize(TreeNodeAdv node, DrawContext context)
    1.25 +		{
    1.26 +			return ResourceHelper.LoadingIcon.FrameSize;
    1.27 +		}
    1.28 +
    1.29 +		protected override void OnIsVisibleValueNeeded(NodeControlValueEventArgs args)
    1.30 +		{
    1.31 +			args.Value = args.Node.IsExpandingNow;
    1.32 +			base.OnIsVisibleValueNeeded(args);
    1.33 +		}
    1.34 +
    1.35 +		public override void Draw(TreeNodeAdv node, DrawContext context)
    1.36 +		{
    1.37 +			Rectangle rect = GetBounds(node, context);
    1.38 +			Image img = _gif.GetFrame(_index).Image;
    1.39 +			context.Graphics.DrawImage(img, rect.Location);
    1.40 +		}
    1.41 +
    1.42 +		public static void Start()
    1.43 +		{
    1.44 +            lock (_lock)
    1.45 +            {
    1.46 +                if (_animatingThread == null)
    1.47 +                {
    1.48 +                    _index = 0;
    1.49 +                    _animatingThread = new Thread(new ThreadStart(IterateIcons));
    1.50 +                    _animatingThread.IsBackground = true;
    1.51 +                    _animatingThread.Priority = ThreadPriority.Lowest;
    1.52 +                    _animatingThread.Start();
    1.53 +                }
    1.54 +            }
    1.55 +		}
    1.56 +
    1.57 +        public static void Stop()
    1.58 +        {
    1.59 +            lock (_lock)
    1.60 +            {
    1.61 +                _index = 0;
    1.62 +                _animatingThread = null;
    1.63 +            }
    1.64 +        }
    1.65 +
    1.66 +		private static void IterateIcons()
    1.67 +		{
    1.68 +            while (_animatingThread != null)
    1.69 +			{
    1.70 +				if (_index < _gif.FrameCount - 1)
    1.71 +					_index++;
    1.72 +				else
    1.73 +					_index = 0;
    1.74 +
    1.75 +				if (IconChanged != null)
    1.76 +					IconChanged(null, EventArgs.Empty);
    1.77 +
    1.78 +				int delay = _gif.GetFrame(_index).Delay;
    1.79 +				Thread.Sleep(delay);
    1.80 +			}
    1.81 +            System.Diagnostics.Debug.WriteLine("IterateIcons Stopped");
    1.82 +		}
    1.83 +
    1.84 +		public static event EventHandler IconChanged;
    1.85 +	}
    1.86 +}