class/System.Drawing/System.Drawing/SizeFConverter.cs

   1 //
   2 // Copyright (C) 2005, 2008 Novell, Inc (http://www.novell.com)
   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 // Authors:
  24 //
  25 //      Dennis Hayes (dennish@Raytek.com)
  26 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
  27 //      Ravindra (rkumar@novell.com)
  28 //      Jordi Mas i Hernandez <jordimash@gmail.com>
  29 //
  30 //
  31
  32 #if NET_2_0
  33
  34 using System;
  35 using System.Collections;
  36 using System.ComponentModel;
  37 using System.Globalization;
  38 using System.ComponentModel.Design.Serialization;
  39 using System.Reflection;
  40
  41 namespace System.Drawing
  42 {
  43         public class SizeFConverter : TypeConverter
  44         {
  45                 public SizeFConverter ()
  46                 {
  47
  48                 }
  49
  50                 public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
  51                 {
  52                         if (sourceType == typeof (string))
  53                                 return true;
  54
  55                         return base.CanConvertFrom (context, sourceType);
  56                 }
  57
  58                 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
  59                 {
  60                         if (destinationType == typeof (string))
  61                                 return true;
  62
  63                         if (destinationType == typeof (InstanceDescriptor))
  64                                 return true;
  65
  66                         return base.CanConvertTo (context, destinationType);
  67                 }
  68
  69                 public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
  70                 {
  71                         string s = value as string;
  72                         if (s == null)
  73                                 return base.ConvertFrom (context, culture, value);
  74
  75                         string[] subs = s.Split (culture.TextInfo.ListSeparator.ToCharArray ());
  76
  77                         SingleConverter converter = new SingleConverter ();
  78                         float[] numSubs = new float[subs.Length];
  79                         for (int i = 0; i < numSubs.Length; i++) {
  80                                 numSubs[i] = (float) converter.ConvertFromString (context, culture, subs[i]);
  81                         }
  82
  83                         if (subs.Length != 2)
  84                                 throw new ArgumentException ("Failed to parse Text(" + s + ") expected text in the format \"Width,Height.\"");
  85
  86                         return new SizeF (numSubs[0], numSubs[1]);
  87
  88                 }
  89
  90                 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
  91                 {
  92                         if (value is SizeF) {
  93                                 SizeF size = (SizeF) value;
  94                                 if (destinationType == typeof (string)) {
  95                                         return size.Width.ToString (culture) + culture.TextInfo.ListSeparator
  96                                                 + " " + size.Height.ToString (culture);
  97                                 } else if (destinationType == typeof (InstanceDescriptor)) {
  98                                         ConstructorInfo ctor = typeof(SizeF).GetConstructor (new Type[] {typeof(float), typeof(float)});
  99                                         return new InstanceDescriptor (ctor, new object[] { size.Width, size.Height});
 100                                 }
 101                         }
 102
 103                         return base.ConvertTo (context, culture, value, destinationType);
 104                 }
 105
 106                 public override object CreateInstance (ITypeDescriptorContext context, IDictionary propertyValues)
 107                 {
 108                         float w = (float) propertyValues ["Width"];
 109                         float h = (float) propertyValues ["Height"];
 110                         return new SizeF (w, h);
 111                 }
 112
 113                 public override bool GetCreateInstanceSupported (ITypeDescriptorContext context)
 114                 {
 115                         return true;
 116                 }
 117
 118                 public override PropertyDescriptorCollection GetProperties (ITypeDescriptorContext context, object value, Attribute[] attributes)
 119                 {
 120                         if (value is SizeF)
 121                                 return TypeDescriptor.GetProperties (value, attributes);
 122
 123                         return base.GetProperties (context, value, attributes);
 124                 }
 125
 126                 public override bool GetPropertiesSupported (ITypeDescriptorContext context)
 127                 {
 128                         return true;
 129                 }
 130         }
 131 }
 132
 133 #endif
 134