Code/Tools/LuaRemoteDebugger/Aga.Controls/Tree/NodeControls/NodePlusMinus.cs

   1 // Copyright 2001-2019 Crytek GmbH / Crytek Group. All rights reserved.
   2
   3 using System;
   4 using System.Collections.Generic;
   5 using System.Text;
   6 using System.Drawing;
   7 using Aga.Controls.Properties;
   8 using System.Windows.Forms;
   9 using System.Windows.Forms.VisualStyles;
  10
  11 namespace Aga.Controls.Tree.NodeControls
  12 {
  13         internal class NodePlusMinus : NodeControl
  14         {
  15                 public const int ImageSize = 9;
  16                 public const int Width = 16;
  17                 private Bitmap _plus;
  18                 private Bitmap _minus;
  19
  20                 private VisualStyleRenderer _openedRenderer;
  21                 private VisualStyleRenderer OpenedRenderer
  22                 {
  23                         get
  24                         {
  25                                 if (_openedRenderer == null)
  26                                         _openedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Opened);
  27                                 return _openedRenderer;
  28
  29                         }
  30                 }
  31
  32                 private VisualStyleRenderer _closedRenderer;
  33                 private VisualStyleRenderer ClosedRenderer
  34                 {
  35                         get
  36                         {
  37                                 if (_closedRenderer == null)
  38                                         _closedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Closed);
  39                                 return _closedRenderer;
  40                         }
  41                 }
  42
  43                 public NodePlusMinus()
  44                 {
  45                         _plus = Resources.plus;
  46                         _minus = Resources.minus;
  47                 }
  48
  49                 public override Size MeasureSize(TreeNodeAdv node, DrawContext context)
  50                 {
  51                         return new Size(Width, Width);
  52                 }
  53
  54                 public override void Draw(TreeNodeAdv node, DrawContext context)
  55                 {
  56                         if (node.CanExpand)
  57                         {
  58                                 Rectangle r = context.Bounds;
  59                                 int dy = (int)Math.Round((float)(r.Height - ImageSize) / 2);
  60                                 if (Application.RenderWithVisualStyles)
  61                                 {
  62                                         VisualStyleRenderer renderer;
  63                                         if (node.IsExpanded)
  64                                                 renderer = OpenedRenderer;
  65                                         else
  66                                                 renderer = ClosedRenderer;
  67                                         renderer.DrawBackground(context.Graphics, new Rectangle(r.X, r.Y + dy, ImageSize, ImageSize));
  68                                 }
  69                                 else
  70                                 {
  71                                         Image img;
  72                                         if (node.IsExpanded)
  73                                                 img = _minus;
  74                                         else
  75                                                 img = _plus;
  76                                         context.Graphics.DrawImageUnscaled(img, new Point(r.X, r.Y + dy));
  77                                 }
  78                         }
  79                 }
  80
  81                 public override void MouseDown(TreeNodeAdvMouseEventArgs args)
  82                 {
  83                         if (args.Button == MouseButtons.Left)
  84                         {
  85                                 args.Handled = true;
  86                                 if (args.Node.CanExpand)
  87                                         args.Node.IsExpanded = !args.Node.IsExpanded;
  88                         }
  89                 }
  90
  91                 public override void MouseDoubleClick(TreeNodeAdvMouseEventArgs args)
  92                 {
  93                         args.Handled = true; // Supress expand/collapse when double click on plus/minus
  94                 }
  95         }
  96 }