1 // 2 // System.Drawing.RectangleConverter.cs 3 // 4 // Authors: 5 // Dennis Hayes (dennish@Raytek.com) 6 // Jordi Mas (jordi@ximian.com) 7 // Ravindra (rkumar@novell.com) 8 // 9 // Copyright (C) 2002 Ximian, Inc. http://www.ximian.com 10 // Copyright (C) 2004, 2006, 2008 Novell, Inc (http://www.novell.com) 11 // 12 // Permission is hereby granted, free of charge, to any person obtaining 13 // a copy of this software and associated documentation files (the 14 // "Software"), to deal in the Software without restriction, including 15 // without limitation the rights to use, copy, modify, merge, publish, 16 // distribute, sublicense, and/or sell copies of the Software, and to 17 // permit persons to whom the Software is furnished to do so, subject to 18 // the following conditions: 19 // 20 // The above copyright notice and this permission notice shall be 21 // included in all copies or substantial portions of the Software. 22 // 23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 30 // 31 32 using System.ComponentModel; 33 using System.Collections; 34 using System.Globalization; 35 using System.Text; 36 using System.ComponentModel.Design.Serialization; 37 using System.Reflection; 38 39 namespace System.Drawing { 40 41 public class RectangleConverter : TypeConverter 42 { RectangleConverter()43 public RectangleConverter () 44 { 45 } 46 CanConvertFrom(ITypeDescriptorContext context, Type sourceType)47 public override bool CanConvertFrom (ITypeDescriptorContext context, 48 Type sourceType) 49 { 50 if (sourceType == typeof (string)) 51 return true; 52 53 return base.CanConvertFrom (context, sourceType); 54 } 55 CanConvertTo(ITypeDescriptorContext context, Type destinationType)56 public override bool CanConvertTo (ITypeDescriptorContext context, 57 Type destinationType) 58 { 59 if (destinationType == typeof (string)) 60 return true; 61 62 if (destinationType == typeof (InstanceDescriptor)) 63 return true; 64 65 return base.CanConvertTo (context, destinationType); 66 } 67 ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)68 public override object ConvertFrom (ITypeDescriptorContext context, 69 CultureInfo culture, 70 object value) 71 { 72 string s = value as string; 73 if (s == null) 74 return base.ConvertFrom (context, culture, value); 75 76 if (culture == null) 77 culture = CultureInfo.CurrentCulture; 78 string [] subs = s.Split (culture.TextInfo.ListSeparator.ToCharArray ()); 79 80 Int32Converter converter = new Int32Converter (); 81 int[] numSubs = new int[subs.Length]; 82 for (int i = 0; i < numSubs.Length; i++) { 83 numSubs[i] = (int) converter.ConvertFromString (context, culture, subs[i]); 84 } 85 86 if (subs.Length != 4) 87 throw new ArgumentException ("Failed to parse Text(" + s + ") expected text in the format \"x,y,Width,Height.\""); 88 89 return new Rectangle (numSubs[0], numSubs[1], numSubs[2], numSubs[3]); 90 } 91 ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)92 public override object ConvertTo (ITypeDescriptorContext context, 93 CultureInfo culture, 94 object value, 95 Type destinationType) 96 { 97 // LAMESPEC: "The default implementation calls the object's 98 // ToString method if the object is valid and if the destination 99 // type is string." MS does not behave as per the specs. 100 // Oh well, we have to be compatible with MS. 101 if (value is Rectangle) { 102 Rectangle rect = (Rectangle) value; 103 if (destinationType == typeof (string)) { 104 string separator = culture.TextInfo.ListSeparator; 105 StringBuilder sb = new StringBuilder (); 106 sb.Append (rect.X.ToString (culture)); 107 sb.Append (separator); 108 sb.Append (" "); 109 sb.Append (rect.Y.ToString (culture)); 110 sb.Append (separator); 111 sb.Append (" "); 112 sb.Append (rect.Width.ToString (culture)); 113 sb.Append (separator); 114 sb.Append (" "); 115 sb.Append (rect.Height.ToString (culture)); 116 return sb.ToString (); 117 } else if (destinationType == typeof (InstanceDescriptor)) { 118 ConstructorInfo ctor = typeof(Rectangle).GetConstructor (new Type[] {typeof(int), typeof(int), typeof(int), typeof(int)} ); 119 return new InstanceDescriptor (ctor, new object[] {rect.X, rect.Y, rect.Width, rect.Height}); 120 } 121 } 122 123 return base.ConvertTo (context, culture, value, destinationType); 124 } 125 CreateInstance(ITypeDescriptorContext context, IDictionary propertyValues)126 public override object CreateInstance (ITypeDescriptorContext context, 127 IDictionary propertyValues) 128 { 129 object ox = propertyValues ["X"]; 130 object oy = propertyValues ["Y"]; 131 object ow = propertyValues ["Width"]; 132 object oh = propertyValues ["Height"]; 133 if ((ox == null) || (oy == null) || (ow == null) || (oh == null)) 134 throw new ArgumentException ("propertyValues"); 135 136 int x = (int) ox; 137 int y = (int) oy; 138 int width = (int) ow; 139 int height = (int) oh; 140 return new Rectangle (x, y, width, height); 141 } 142 GetCreateInstanceSupported(ITypeDescriptorContext context)143 public override bool GetCreateInstanceSupported (ITypeDescriptorContext context) 144 { 145 return true; 146 } 147 GetProperties( ITypeDescriptorContext context, object value, Attribute[] attributes)148 public override PropertyDescriptorCollection GetProperties ( 149 ITypeDescriptorContext context, 150 object value, Attribute[] attributes) 151 { 152 if (value is Rectangle) 153 return TypeDescriptor.GetProperties (value, attributes); 154 155 return base.GetProperties (context, value, attributes); 156 } 157 GetPropertiesSupported(ITypeDescriptorContext context)158 public override bool GetPropertiesSupported (ITypeDescriptorContext context) 159 { 160 return true; 161 } 162 } 163 } 164