mcs/class/System.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
  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 {
  72                                 if (this.show_check_margin != value) {
  73                                         this.show_check_margin = value;
  74                                         PerformLayout (this, "ShowCheckMargin");
  75                                 }
  76                         }
  77                 }
  78
  79                 [DefaultValue (true)]
  80                 public bool ShowImageMargin {
  81                         get { return this.show_image_margin; }
  82                         set {
  83                                 if (this.show_image_margin != value) {
  84                                         this.show_image_margin = value;
  85                                         PerformLayout (this, "ShowImageMargin");
  86                                 }
  87                         }
  88                 }
  89                 #endregion
  90
  91                 #region Protected Properties
  92                 protected override Padding DefaultPadding {
  93                         get { return base.DefaultPadding; }
  94                 }
  95
  96                 protected internal override Size MaxItemSize {
  97                         get { return Size; }
  98                 }
  99                 #endregion
 100
 101                 #region Protected Methods
 102                 protected internal override ToolStripItem CreateDefaultItem (string text, Image image, EventHandler onClick)
 103                 {
 104                         return base.CreateDefaultItem (text, image, onClick);
 105                 }
 106
 107                 protected override void OnFontChanged (EventArgs e)
 108                 {
 109                         base.OnFontChanged (e);
 110                 }
 111
 112                 protected override void OnLayout (LayoutEventArgs e)
 113                 {
 114                         // Find the widest menu item
 115                         int widest = 0;
 116
 117                         foreach (ToolStripItem tsi in this.Items) {
 118                                 if (!tsi.Available)
 119                                         continue;
 120
 121                                 tsi.SetPlacement (ToolStripItemPlacement.Main);
 122
 123                                 widest = Math.Max (widest, tsi.GetPreferredSize (Size.Empty).Width);
 124                         }
 125
 126                         int x = this.Padding.Left;
 127
 128                         if (show_check_margin || show_image_margin)
 129                                 widest += 68 - this.Padding.Horizontal;
 130                         else
 131                                 widest += 47 - this.Padding.Horizontal;
 132
 133                         int y = this.Padding.Top;
 134
 135                         foreach (ToolStripItem tsi in this.Items) {
 136                                 if (!tsi.Available)
 137                                         continue;
 138
 139                                 y += tsi.Margin.Top;
 140
 141                                 int height = 0;
 142
 143                                 Size preferred_size = tsi.GetPreferredSize (Size.Empty);
 144
 145                                 if (preferred_size.Height > 22)
 146                                         height = preferred_size.Height;
 147                                 else if (tsi is ToolStripSeparator)
 148                                         height = 7;
 149                                 else
 150                                         height = 22;
 151
 152                                 tsi.SetBounds (new Rectangle (x, y, widest, height));
 153                                 y += height + tsi.Margin.Bottom;
 154                         }
 155
 156                         this.Size = new Size (widest + this.Padding.Horizontal, y + this.Padding.Bottom);// + 2);
 157                         this.SetDisplayedItems ();
 158                         this.OnLayoutCompleted (EventArgs.Empty);
 159                         this.Invalidate ();
 160                 }
 161
 162                 protected override void OnPaintBackground (PaintEventArgs e)
 163                 {
 164                         Rectangle affected_bounds = new Rectangle (Point.Empty, this.Size);
 165
 166                         ToolStripRenderEventArgs tsrea = new ToolStripRenderEventArgs (e.Graphics, this, affected_bounds, SystemColors.Control);
 167                         tsrea.InternalConnectedArea = CalculateConnectedArea ();
 168
 169                         this.Renderer.DrawToolStripBackground (tsrea);
 170
 171                         if (this.ShowCheckMargin || this.ShowImageMargin) {
 172                                 tsrea = new ToolStripRenderEventArgs (e.Graphics, this, new Rectangle (tsrea.AffectedBounds.Location, new Size (25, tsrea.AffectedBounds.Height)), SystemColors.Control);
 173                                 this.Renderer.DrawImageMargin (tsrea);
 174                         }
 175                 }
 176
 177                 protected override void SetDisplayedItems ()
 178                 {
 179                         base.SetDisplayedItems ();
 180                 }
 181                 #endregion
 182
 183                 #region Internal Methods
 184                 internal override Rectangle CalculateConnectedArea ()
 185                 {
 186                         if (this.OwnerItem != null && !this.OwnerItem.IsOnDropDown && !(this.OwnerItem is MdiControlStrip.SystemMenuItem)) {
 187                                 Point owner_screen_loc = OwnerItem.GetCurrentParent ().PointToScreen (OwnerItem.Location);
 188                                 return new Rectangle (owner_screen_loc.X - Left, 0, this.OwnerItem.Width - 1, 2);
 189                         }
 190
 191                         return base.CalculateConnectedArea ();
 192                 }
 193                 #endregion
 194         }
 195 }