OpenHardwareMonitor-retired: External/Aga.Controls/Tree/NodeControls/NodePlusMinus.cs@0c551e8818e0

     1 using System;

     2 using System.Collections.Generic;

     3 using System.Text;

     4 using System.Drawing;

     5 using Aga.Controls.Properties;

     6 using System.Windows.Forms;

     7 using System.Windows.Forms.VisualStyles;

     9 namespace Aga.Controls.Tree.NodeControls

    10 {

    11 	internal class NodePlusMinus : NodeControl

    12 	{

    13 		public const int ImageSize = 9;

    14 		public const int Width = 16;

    15 		private Bitmap _plus;

    16 		private Bitmap _minus;

    18 		private VisualStyleRenderer _openedRenderer;

    19 		private VisualStyleRenderer OpenedRenderer

    20 		{

    21 			get

    22 			{

    23 				if (_openedRenderer == null)

    24 					_openedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Opened);

    25 				return _openedRenderer;

    27 			}

    28 		}

    30 		private VisualStyleRenderer _closedRenderer;

    31 		private VisualStyleRenderer ClosedRenderer

    32 		{

    33 			get

    34 			{

    35 				if (_closedRenderer == null)

    36 					_closedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Closed);

    37 				return _closedRenderer;

    38 			}

    39 		}

    41 		public NodePlusMinus()

    42 		{

    43 			_plus = Resources.plus;

    44 			_minus = Resources.minus;

    45 		}

    47 		public override Size MeasureSize(TreeNodeAdv node, DrawContext context)

    48 		{

    49 			return new Size(Width, Width);

    50 		}

    52 		public override void Draw(TreeNodeAdv node, DrawContext context)

    53 		{

    54 			if (node.CanExpand)

    55 			{

    56 				Rectangle r = context.Bounds;

    57 				int dy = (int)Math.Round((float)(r.Height - ImageSize) / 2);

    58 				if (Application.RenderWithVisualStyles)

    59 				{

    60 					VisualStyleRenderer renderer;

    61 					if (node.IsExpanded)

    62 						renderer = OpenedRenderer;

    63 					else

    64 						renderer = ClosedRenderer;

    65 					renderer.DrawBackground(context.Graphics, new Rectangle(r.X, r.Y + dy, ImageSize, ImageSize));

    66 				}

    67 				else

    68 				{

    69 					Image img;

    70 					if (node.IsExpanded)

    71 						img = _minus;

    72 					else

    73 						img = _plus;

    74 					context.Graphics.DrawImageUnscaled(img, new Point(r.X, r.Y + dy));

    75 				}

    76 			}

    77 		}

    79 		public override void MouseDown(TreeNodeAdvMouseEventArgs args)

    80 		{

    81 			if (args.Button == MouseButtons.Left)

    82 			{

    83 				args.Handled = true;

    84 				if (args.Node.CanExpand)

    85 					args.Node.IsExpanded = !args.Node.IsExpanded;

    86 			}

    87 		}

    89 		public override void MouseDoubleClick(TreeNodeAdvMouseEventArgs args)

    90 		{

    91 			args.Handled = true; // Supress expand/collapse when double click on plus/minus

    92 		}

    93 	}

    94 }

author	moel.mich
	Sun, 27 May 2012 15:16:19 +0000
changeset 345	0c551e8818e0
permissions	-rw-r--r--