moel@345: using System;
moel@345: using System.Collections.Generic;
moel@345: using System.Text;
moel@345: using System.Drawing;
moel@345: using Aga.Controls.Properties;
moel@345: using System.Windows.Forms;
moel@345: using System.Windows.Forms.VisualStyles;
moel@345: 
moel@345: namespace Aga.Controls.Tree.NodeControls
moel@345: {
moel@345: 	internal class NodePlusMinus : NodeControl
moel@345: 	{
moel@345: 		public const int ImageSize = 9;
moel@345: 		public const int Width = 16;
moel@345: 		private Bitmap _plus;
moel@345: 		private Bitmap _minus;
moel@345: 
moel@345: 		private VisualStyleRenderer _openedRenderer;
moel@345: 		private VisualStyleRenderer OpenedRenderer
moel@345: 		{
moel@345: 			get
moel@345: 			{
moel@345: 				if (_openedRenderer == null)
moel@345: 					_openedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Opened);
moel@345: 				return _openedRenderer;
moel@345: 
moel@345: 			}
moel@345: 		}
moel@345: 
moel@345: 		private VisualStyleRenderer _closedRenderer;
moel@345: 		private VisualStyleRenderer ClosedRenderer
moel@345: 		{
moel@345: 			get
moel@345: 			{
moel@345: 				if (_closedRenderer == null)
moel@345: 					_closedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Closed);
moel@345: 				return _closedRenderer;
moel@345: 			}
moel@345: 		}
moel@345: 
moel@345: 		public NodePlusMinus()
moel@345: 		{
moel@345: 			_plus = Resources.plus;
moel@345: 			_minus = Resources.minus;
moel@345: 		}
moel@345: 
moel@345: 		public override Size MeasureSize(TreeNodeAdv node, DrawContext context)
moel@345: 		{
moel@345: 			return new Size(Width, Width);
moel@345: 		}
moel@345: 
moel@345: 		public override void Draw(TreeNodeAdv node, DrawContext context)
moel@345: 		{
moel@345: 			if (node.CanExpand)
moel@345: 			{
moel@345: 				Rectangle r = context.Bounds;
moel@345: 				int dy = (int)Math.Round((float)(r.Height - ImageSize) / 2);
moel@345: 				if (Application.RenderWithVisualStyles)
moel@345: 				{
moel@345: 					VisualStyleRenderer renderer;
moel@345: 					if (node.IsExpanded)
moel@345: 						renderer = OpenedRenderer;
moel@345: 					else
moel@345: 						renderer = ClosedRenderer;
moel@345: 					renderer.DrawBackground(context.Graphics, new Rectangle(r.X, r.Y + dy, ImageSize, ImageSize));
moel@345: 				}
moel@345: 				else
moel@345: 				{
moel@345: 					Image img;
moel@345: 					if (node.IsExpanded)
moel@345: 						img = _minus;
moel@345: 					else
moel@345: 						img = _plus;
moel@345: 					context.Graphics.DrawImageUnscaled(img, new Point(r.X, r.Y + dy));
moel@345: 				}
moel@345: 			}
moel@345: 		}
moel@345: 
moel@345: 		public override void MouseDown(TreeNodeAdvMouseEventArgs args)
moel@345: 		{
moel@345: 			if (args.Button == MouseButtons.Left)
moel@345: 			{
moel@345: 				args.Handled = true;
moel@345: 				if (args.Node.CanExpand)
moel@345: 					args.Node.IsExpanded = !args.Node.IsExpanded;
moel@345: 			}
moel@345: 		}
moel@345: 
moel@345: 		public override void MouseDoubleClick(TreeNodeAdvMouseEventArgs args)
moel@345: 		{
moel@345: 			args.Handled = true; // Supress expand/collapse when double click on plus/minus
moel@345: 		}
moel@345: 	}
moel@345: }