mcs/class/Managed.Windows.Forms/System.Windows.Forms.Layout/DefaultLayout.cs

   1 //\r
   2 // DefaultLayout.cs\r
   3 //\r
   4 // Permission is hereby granted, free of charge, to any person obtaining\r
   5 // a copy of this software and associated documentation files (the\r
   6 // "Software"), to deal in the Software without restriction, including\r
   7 // without limitation the rights to use, copy, modify, merge, publish,\r
   8 // distribute, sublicense, and/or sell copies of the Software, and to\r
   9 // permit persons to whom the Software is furnished to do so, subject to\r
  10 // the following conditions:\r
  11 // \r
  12 // The above copyright notice and this permission notice shall be\r
  13 // included in all copies or substantial portions of the Software.\r
  14 // \r
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\r
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\r
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\r
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  22 //\r
  23 // Copyright (c) 2006 Jonathan Pobst\r
  24 //\r
  25 // Authors:\r
  26 //      Jonathan Pobst (monkey@jpobst.com)\r
  27 //\r
  28 \r
  29 #if NET_2_0\r
  30 using System;\r
  31 using System.Drawing;\r
  32 \r
  33 namespace System.Windows.Forms.Layout\r
  34 {\r
  35         class DefaultLayout : LayoutEngine\r
  36         {\r
  37                 public override bool Layout (object container, LayoutEventArgs args)\r
  38                 {\r
  39                         // Copied from 1.1's Control.PerformLayout\r
  40                         Control parent = container as Control;\r
  41 \r
  42                         Control child;\r
  43                         AnchorStyles anchor;\r
  44                         Rectangle space;\r
  45 \r
  46                         space = parent.DisplayRectangle;\r
  47 \r
  48                         // Deal with docking; go through in reverse, MS docs say that lowest Z-order is closest to edge\r
  49                         Control[] controls = parent.child_controls.GetAllControls ();\r
  50                         for (int i = controls.Length - 1; i >= 0; i--) {\r
  51                                 child = controls[i];\r
  52 \r
  53                                 if (!child.Visible) {\r
  54                                         continue;\r
  55                                 }\r
  56 \r
  57                                 switch (child.Dock) {\r
  58                                         case DockStyle.None: {\r
  59                                                         // Do nothing\r
  60                                                         break;\r
  61                                                 }\r
  62 \r
  63                                         case DockStyle.Left: {\r
  64                                                         child.SetBounds (space.Left, space.Y, child.Width, space.Height);\r
  65                                                         space.X += child.Width;\r
  66                                                         space.Width -= child.Width;\r
  67                                                         break;\r
  68                                                 }\r
  69 \r
  70                                         case DockStyle.Top: {\r
  71                                                         child.SetBounds (space.Left, space.Y, space.Width, child.Height);\r
  72                                                         space.Y += child.Height;\r
  73                                                         space.Height -= child.Height;\r
  74                                                         break;\r
  75                                                 }\r
  76 \r
  77                                         case DockStyle.Right: {\r
  78                                                         child.SetBounds (space.Right - child.Width, space.Y, child.Width, space.Height);\r
  79                                                         space.Width -= child.Width;\r
  80                                                         break;\r
  81                                                 }\r
  82 \r
  83                                         case DockStyle.Bottom: {\r
  84                                                         child.SetBounds (space.Left, space.Bottom - child.Height, space.Width, child.Height);\r
  85                                                         space.Height -= child.Height;\r
  86                                                         break;\r
  87                                                 }\r
  88                                 }\r
  89                         }\r
  90 \r
  91                         for (int i = controls.Length - 1; i >= 0; i--) {\r
  92                                 child = controls[i];\r
  93 \r
  94                                 if (child.Visible && (child.Dock == DockStyle.Fill)) {\r
  95                                         child.SetBounds (space.Left, space.Top, space.Width, space.Height);\r
  96                                 }\r
  97                         }\r
  98 \r
  99                         space = parent.DisplayRectangle;\r
 100 \r
 101                         for (int i = 0; i < controls.Length; i++) {\r
 102                                 int left;\r
 103                                 int top;\r
 104                                 int width;\r
 105                                 int height;\r
 106 \r
 107                                 child = controls[i];\r
 108 \r
 109                                 // If the control is docked we don't need to do anything\r
 110                                 if (child.Dock != DockStyle.None) {\r
 111                                         continue;\r
 112                                 }\r
 113 \r
 114                                 anchor = child.Anchor;\r
 115 \r
 116                                 left = child.Left;\r
 117                                 top = child.Top;\r
 118                                 width = child.Width;\r
 119                                 height = child.Height;\r
 120 \r
 121                                 if ((anchor & AnchorStyles.Left) != 0) {\r
 122                                         if ((anchor & AnchorStyles.Right) != 0) {\r
 123                                                 width = space.Width - child.dist_right - left;\r
 124                                         }\r
 125                                         else {\r
 126                                                 ; // Left anchored only, nothing to be done\r
 127                                         }\r
 128                                 }\r
 129                                 else if ((anchor & AnchorStyles.Right) != 0) {\r
 130                                         left = space.Width - child.dist_right - width;\r
 131                                 }\r
 132                                 else {\r
 133                                         // left+=diff_width/2 will introduce rounding errors (diff_width removed from svn after r51780)\r
 134                                         // This calculates from scratch every time:\r
 135                                         left = child.dist_left + (space.Width - (child.dist_left + width + child.dist_right)) / 2;\r
 136                                 }\r
 137 \r
 138                                 if ((anchor & AnchorStyles.Top) != 0) {\r
 139                                         if ((anchor & AnchorStyles.Bottom) != 0) {\r
 140                                                 height = space.Height - child.dist_bottom - top;\r
 141                                         }\r
 142                                         else {\r
 143                                                 ; // Top anchored only, nothing to be done\r
 144                                         }\r
 145                                 }\r
 146                                 else if ((anchor & AnchorStyles.Bottom) != 0) {\r
 147                                         top = space.Height - child.dist_bottom - height;\r
 148                                 }\r
 149                                 else {\r
 150                                         // top += diff_height/2 will introduce rounding errors (diff_height removed from after r51780)\r
 151                                         // This calculates from scratch every time:\r
 152                                         top = child.dist_top + (space.Height - (child.dist_top + height + child.dist_bottom)) / 2;\r
 153                                 }\r
 154 \r
 155                                 // Sanity\r
 156                                 if (width < 0) {\r
 157                                         width = 0;\r
 158                                 }\r
 159 \r
 160                                 if (height < 0) {\r
 161                                         height = 0;\r
 162                                 }\r
 163 \r
 164                                 child.SetBounds (left, top, width, height);\r
 165                         }\r
 166 \r
 167                         return false;\r
 168                 }\r
 169         }\r
 170 }\r
 171 #endif