OpenHardwareMonitor-retired: External/Aga.Controls/Tree/NodeControls/NodeCheckBox.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.Reflection;

     7 using System.Windows.Forms;

     8 using System.Windows.Forms.VisualStyles;

     9 using System.ComponentModel;

    11 namespace Aga.Controls.Tree.NodeControls

    12 {

    13 	public class NodeCheckBox : InteractiveControl

    14 	{

    15 		public const int ImageSize = 13;

    17 		private Bitmap _check;

    18 		private Bitmap _uncheck;

    19 		private Bitmap _unknown;

    21 		#region Properties

    23 		private bool _threeState;

    24 		[DefaultValue(false)]

    25 		public bool ThreeState

    26 		{

    27 			get { return _threeState; }

    28 			set { _threeState = value; }

    29 		}

    31 		#endregion

    33 		public NodeCheckBox()

    34 			: this(string.Empty)

    35 		{

    36 		}

    38 		public NodeCheckBox(string propertyName)

    39 		{

    40 			_check = Resources.check;

    41 			_uncheck = Resources.uncheck;

    42 			_unknown = Resources.unknown;

    43 			DataPropertyName = propertyName;

    44 			LeftMargin = 0;

    45 		}

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

    48 		{

    49 			return new Size(ImageSize, ImageSize);

    50 		}

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

    53 		{

    54 			Rectangle bounds = GetBounds(node, context);

    55 			CheckState state = GetCheckState(node);

    56 			if (Application.RenderWithVisualStyles)

    57 			{

    58 				VisualStyleRenderer renderer;

    59 				if (state == CheckState.Indeterminate)

    60 					renderer = new VisualStyleRenderer(VisualStyleElement.Button.CheckBox.MixedNormal);

    61 				else if (state == CheckState.Checked)

    62 					renderer = new VisualStyleRenderer(VisualStyleElement.Button.CheckBox.CheckedNormal);

    63 				else

    64 					renderer = new VisualStyleRenderer(VisualStyleElement.Button.CheckBox.UncheckedNormal);

    65 				renderer.DrawBackground(context.Graphics, new Rectangle(bounds.X, bounds.Y, ImageSize, ImageSize));

    66 			}

    67 			else

    68 			{

    69 				Image img;

    70 				if (state == CheckState.Indeterminate)

    71 					img = _unknown;

    72 				else if (state == CheckState.Checked)

    73 					img = _check;

    74 				else

    75 					img = _uncheck;

    76 				context.Graphics.DrawImage(img, bounds.Location);

    77 			}

    78 		}

    80 		protected virtual CheckState GetCheckState(TreeNodeAdv node)

    81 		{

    82 			object obj = GetValue(node);

    83 			if (obj is CheckState)

    84 				return (CheckState)obj;

    85 			else if (obj is bool)

    86 				return (bool)obj ? CheckState.Checked : CheckState.Unchecked;

    87 			else

    88 				return CheckState.Unchecked;

    89 		}

    91 		protected virtual void SetCheckState(TreeNodeAdv node, CheckState value)

    92 		{

    93 			if (VirtualMode)

    94 			{

    95 				SetValue(node, value);

    96 				OnCheckStateChanged(node);

    97 			}

    98 			else

    99 			{

   100 				Type type = GetPropertyType(node);

   101 				if (type == typeof(CheckState))

   102 				{

   103 					SetValue(node, value);

   104 					OnCheckStateChanged(node);

   105 				}

   106 				else if (type == typeof(bool))

   107 				{

   108 					SetValue(node, value != CheckState.Unchecked);

   109 					OnCheckStateChanged(node);

   110 				}

   111 			}

   112 		}

   114 		public override void MouseDown(TreeNodeAdvMouseEventArgs args)

   115 		{

   116 			if (args.Button == MouseButtons.Left && IsEditEnabled(args.Node))

   117 			{

   118 				DrawContext context = new DrawContext();

   119 				context.Bounds = args.ControlBounds;

   120 				Rectangle rect = GetBounds(args.Node, context);

   121 				if (rect.Contains(args.ViewLocation))

   122 				{

   123 					CheckState state = GetCheckState(args.Node);

   124 					state = GetNewState(state);

   125 					SetCheckState(args.Node, state);

   126 					Parent.UpdateView();

   127 					args.Handled = true;

   128 				}

   129 			}

   130 		}

   132 		public override void MouseDoubleClick(TreeNodeAdvMouseEventArgs args)

   133 		{

   134 			args.Handled = true;

   135 		}

   137 		private CheckState GetNewState(CheckState state)

   138 		{

   139 			if (state == CheckState.Indeterminate)

   140 				return CheckState.Unchecked;

   141 			else if(state == CheckState.Unchecked)

   142 				return CheckState.Checked;

   143 			else

   144 				return ThreeState ? CheckState.Indeterminate : CheckState.Unchecked;

   145 		}

   147 		public override void KeyDown(KeyEventArgs args)

   148 		{

   149 			if (args.KeyCode == Keys.Space && EditEnabled)

   150 			{

   151 				Parent.BeginUpdate();

   152 				try

   153 				{

   154 					if (Parent.CurrentNode != null)

   155 					{

   156 						CheckState value = GetNewState(GetCheckState(Parent.CurrentNode));

   157 						foreach (TreeNodeAdv node in Parent.Selection)

   158 							if (IsEditEnabled(node))

   159 								SetCheckState(node, value);

   160 					}

   161 				}

   162 				finally

   163 				{

   164 					Parent.EndUpdate();

   165 				}

   166 				args.Handled = true;

   167 			}

   168 		}

   170 		public event EventHandler<TreePathEventArgs> CheckStateChanged;

   171 		protected void OnCheckStateChanged(TreePathEventArgs args)

   172 		{

   173 			if (CheckStateChanged != null)

   174 				CheckStateChanged(this, args);

   175 		}

   177 		protected void OnCheckStateChanged(TreeNodeAdv node)

   178 		{

   179 			TreePath path = this.Parent.GetPath(node);

   180 			OnCheckStateChanged(new TreePathEventArgs(path));

   181 		}

   183 	}

   184 }

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