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

   1 //
   2 // ToolStripOverflow.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) 2007 Novell
  24 //
  25 // Authors:
  26 //      Jonathan Pobst (monkey@jpobst.com)
  27 //
  28
  29 #if NET_2_0
  30 using System;
  31 using System.Runtime.InteropServices;
  32 using System.ComponentModel;
  33 using System.Drawing;
  34 using System.Windows.Forms.Layout;
  35
  36 namespace System.Windows.Forms
  37 {
  38         [ComVisible (true)]
  39         [ClassInterface (ClassInterfaceType.AutoDispatch)]
  40         public class ToolStripOverflow : ToolStripDropDown, IComponent, IDisposable
  41         {
  42                 private LayoutEngine layout_engine;
  43
  44                 #region Public Constructors
  45                 public ToolStripOverflow (ToolStripItem parentItem)
  46                 {
  47                         this.OwnerItem = parentItem;
  48                 }
  49                 #endregion
  50
  51                 #region Public Properties
  52                 // XXX - This probably adds ToolStripOverflowButton to the returned collection
  53                 public override ToolStripItemCollection Items {
  54                         get { return base.Items; }
  55                 }
  56
  57                 public override LayoutEngine LayoutEngine {
  58                         get {
  59                                 if (this.layout_engine == null)
  60                                         this.layout_engine = new FlowLayout ();
  61
  62                                 return base.LayoutEngine;
  63                         }
  64                 }
  65                 #endregion
  66
  67                 #region Protected Properties
  68                 protected internal override ToolStripItemCollection DisplayedItems {
  69                         get { return base.DisplayedItems; }
  70                 }
  71                 #endregion
  72
  73                 #region Public Methods
  74                 public override Size GetPreferredSize (Size constrainingSize)
  75                 {
  76                         return base.GetToolStripPreferredSize (constrainingSize);
  77                 }
  78                 #endregion
  79
  80                 #region Protected Methods
  81                 protected override AccessibleObject CreateAccessibilityInstance ()
  82                 {
  83                         return new ToolStripOverflowAccessibleObject ();
  84                 }
  85
  86                 [MonoInternalNote ("This should stack in rows of ~3, but for now 1 column will work.")]
  87                 protected override void OnLayout (LayoutEventArgs e)
  88                 {
  89                         SetDisplayedItems ();
  90
  91                         // Find the widest menu item
  92                         int widest = 0;
  93
  94                         foreach (ToolStripItem tsi in this.DisplayedItems) {
  95                                 if (!tsi.Available)
  96                                         continue;
  97                                 if (tsi.GetPreferredSize (Size.Empty).Width > widest)
  98                                         widest = tsi.GetPreferredSize (Size.Empty).Width;
  99                         }
 100
 101                         int x = this.Padding.Left;
 102                         widest += this.Padding.Horizontal;
 103                         int y = this.Padding.Top;
 104
 105                         foreach (ToolStripItem tsi in this.DisplayedItems) {
 106                                 if (!tsi.Available)
 107                                         continue;
 108
 109                                 y += tsi.Margin.Top;
 110
 111                                 int height = 0;
 112
 113                                 if (tsi is ToolStripSeparator)
 114                                         height = 7;
 115                                 else
 116                                         height = tsi.GetPreferredSize (Size.Empty).Height;
 117
 118                                 tsi.SetBounds (new Rectangle (x, y, widest, height));
 119                                 y += tsi.Height + tsi.Margin.Bottom;
 120                         }
 121
 122                         this.Size = new Size (widest + this.Padding.Horizontal, y + this.Padding.Bottom);// + 2);
 123                 }
 124
 125                 protected override void SetDisplayedItems ()
 126                 {
 127                         this.displayed_items.ClearInternal ();
 128
 129                         if (this.OwnerItem != null && this.OwnerItem.Parent != null)
 130                                 foreach (ToolStripItem tsi in this.OwnerItem.Parent.Items)
 131                                         if (tsi.Placement == ToolStripItemPlacement.Overflow && tsi.Available && !(tsi is ToolStripSeparator)) {
 132                                                 this.displayed_items.AddNoOwnerOrLayout (tsi);
 133                                                 //tsi.Parent = this;
 134                                         }
 135
 136                         this.PerformLayout ();
 137                 }
 138                 #endregion
 139
 140                 #region Internal Methods
 141                 internal ToolStrip ParentToolStrip {
 142                         get { return (ToolStrip)this.OwnerItem.Parent; }
 143                 }
 144                 #endregion
 145
 146                 #region ToolStripOverflowAccessibleObject Class
 147                 private class ToolStripOverflowAccessibleObject : AccessibleObject
 148                 {
 149                 }
 150                 #endregion
 151         }
 152 }
 153 #endif