mcs/class/Managed.Windows.Forms/System.Windows.Forms/ToolStripDropDownMenu.cs

   1 //
   2 // ToolStripDropDownMenu.cs
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining
   5 // a copy of this software and associated documentation files (the
   6 // "Software"), to deal in the Software without restriction, including
   7 // without limitation the rights to use, copy, modify, merge, publish,
   8 // distribute, sublicense, and/or sell copies of the Software, and to
   9 // permit persons to whom the Software is furnished to do so, subject to
  10 // the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 //
  23 // Copyright (c) 2006 Jonathan Pobst
  24 //
  25 // Authors:
  26 //      Jonathan Pobst (monkey@jpobst.com)
  27 //
  28 #if NET_2_0
  29 using System.Drawing;
  30 using System.ComponentModel;
  31 using System.Runtime.InteropServices;
  32 using System.Windows.Forms.Layout;
  33
  34 namespace System.Windows.Forms
  35 {
  36         [ComVisible (true)]
  37         [ClassInterface (ClassInterfaceType.AutoDispatch)]
  38         [Designer ("System.Windows.Forms.Design.ToolStripDropDownDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  39         public class ToolStripDropDownMenu : ToolStripDropDown
  40         {
  41                 private ToolStripLayoutStyle layout_style;
  42                 private bool show_check_margin;
  43                 private bool show_image_margin;
  44
  45                 #region Public Constructors
  46                 public ToolStripDropDownMenu () : base ()
  47                 {
  48                         this.layout_style = ToolStripLayoutStyle.Flow;
  49                         this.show_image_margin = true;
  50                 }
  51                 #endregion
  52
  53                 #region Public Properties
  54                 public override Rectangle DisplayRectangle {
  55                         get { return base.DisplayRectangle; }
  56                 }
  57
  58                 public override LayoutEngine LayoutEngine {
  59                         get { return base.LayoutEngine; }
  60                 }
  61
  62                 [DefaultValue (ToolStripLayoutStyle.Flow)]
  63                 public new ToolStripLayoutStyle LayoutStyle {
  64                         get { return this.layout_style; }
  65                         set { this.layout_style = value; }
  66                 }
  67
  68                 [DefaultValue (false)]
  69                 public bool ShowCheckMargin {
  70                         get { return this.show_check_margin; }
  71                         set { this.show_check_margin = value; }
  72                 }
  73
  74                 [DefaultValue (true)]
  75                 public bool ShowImageMargin {
  76                         get { return this.show_image_margin; }
  77                         set { this.show_image_margin = value; }
  78                 }
  79                 #endregion
  80
  81                 #region Protected Properties
  82                 protected override Padding DefaultPadding {
  83                         get { return base.DefaultPadding; }
  84                 }
  85
  86                 protected internal override Size MaxItemSize {
  87                         get { return Size; }
  88                 }
  89                 #endregion
  90
  91                 #region Protected Methods
  92                 protected internal override ToolStripItem CreateDefaultItem (string text, Image image, EventHandler onClick)
  93                 {
  94                         return base.CreateDefaultItem (text, image, onClick);
  95                 }
  96
  97                 protected override void OnFontChanged (EventArgs e)
  98                 {
  99                         base.OnFontChanged (e);
 100                 }
 101
 102                 protected override void OnLayout (LayoutEventArgs e)
 103                 {
 104                         // Find the widest menu item
 105                         int widest = 0;
 106
 107                         foreach (ToolStripItem tsi in this.Items) {
 108                                 if (!tsi.Available)
 109                                         continue;
 110
 111                                 tsi.SetPlacement (ToolStripItemPlacement.Main);
 112
 113                                 if (tsi.GetPreferredSize (Size.Empty).Width > widest)
 114                                         widest = tsi.GetPreferredSize (Size.Empty).Width;
 115                         }
 116
 117                         int x = this.Padding.Left;
 118
 119                         if (show_check_margin || show_image_margin)
 120                                 widest += 68 - this.Padding.Horizontal;
 121                         else
 122                                 widest += 47 - this.Padding.Horizontal;
 123
 124                         int y = this.Padding.Top;
 125
 126                         foreach (ToolStripItem tsi in this.Items) {
 127                                 if (!tsi.Available)
 128                                         continue;
 129
 130                                 y += tsi.Margin.Top;
 131
 132                                 int height = 0;
 133
 134                                 if (tsi is ToolStripSeparator)
 135                                         height = 7;
 136                                 else
 137                                         height = 22;
 138
 139                                 tsi.SetBounds (new Rectangle (x, y, widest, height));
 140                                 y += tsi.Height + tsi.Margin.Bottom;
 141                         }
 142
 143                         this.Size = new Size (widest + this.Padding.Horizontal, y + this.Padding.Bottom);// + 2);
 144                         this.SetDisplayedItems ();
 145                         this.OnLayoutCompleted (EventArgs.Empty);
 146                         this.Invalidate ();
 147                 }
 148
 149                 protected override void OnPaintBackground (PaintEventArgs pevent)
 150                 {
 151                         Rectangle affected_bounds = new Rectangle (Point.Empty, this.Size);
 152
 153                         ToolStripRenderEventArgs e = new ToolStripRenderEventArgs (pevent.Graphics, this, affected_bounds, SystemColors.Control);
 154                         e.InternalConnectedArea = CalculateConnectedArea ();
 155
 156                         this.Renderer.DrawToolStripBackground (e);
 157
 158                         if (this.ShowCheckMargin || this.ShowImageMargin)
 159                                 this.Renderer.DrawImageMargin (e);
 160                 }
 161
 162                 protected override void SetDisplayedItems ()
 163                 {
 164                         base.SetDisplayedItems ();
 165                 }
 166                 #endregion
 167
 168                 #region Internal Methods
 169                 internal override Rectangle CalculateConnectedArea ()
 170                 {
 171                         if (this.OwnerItem != null && !this.OwnerItem.IsOnDropDown)
 172                                 return new Rectangle (1, 0, this.OwnerItem.Width - 2, 2);
 173
 174                         return base.CalculateConnectedArea ();
 175                 }
 176                 #endregion
 177         }
 178 }
 179 #endif