class/WindowsBase/System.Windows/Point.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Chris Toshok (toshok@novell.com)
  24 //
  25
  26 using System;
  27 using System.ComponentModel;
  28 using System.Windows.Converters;
  29 using System.Windows.Markup;
  30 using System.Windows.Media;
  31 using System.Globalization;
  32
  33 namespace System.Windows {
  34
  35         [Serializable]
  36         [TypeConverter (typeof (PointConverter))]
  37         [ValueSerializer (typeof (PointValueSerializer))]
  38         public struct Point : IFormattable
  39         {
  40                 public Point (double x, double y)
  41                 {
  42                         this.x = x;
  43                         this.y = y;
  44                 }
  45
  46                 public double X {
  47                         get { return x; }
  48                         set { x = value; }
  49                 }
  50
  51                 public double Y {
  52                         get { return y; }
  53                         set { y = value; }
  54                 }
  55
  56                 public override bool Equals (object o)
  57                 {
  58                         if (!(o is Point))
  59                                 return false;
  60                         return Equals ((Point)o);
  61                 }
  62
  63                 public bool Equals (Point value)
  64                 {
  65                         return x == value.X && y == value.Y;
  66                 }
  67
  68                 public override int GetHashCode ()
  69                 {
  70                     return (x.GetHashCode() ^ y.GetHashCode());
  71                 }
  72
  73
  74                 public void Offset (double offsetX, double offsetY)
  75                 {
  76                         x += offsetX;
  77                         y += offsetY;
  78                 }
  79
  80                 public static Point Add (Point point, Vector vector)
  81                 {
  82                         return new Point (point.X + vector.X, point.Y + vector.Y);
  83                 }
  84
  85                 public static bool Equals (Point point1, Point point2)
  86                 {
  87                         return point1.Equals (point2);
  88                 }
  89
  90                 public static Point Multiply (Point point, Matrix matrix)
  91                 {
  92                         return new Point (point.X * matrix.M11 + point.Y * matrix.M21 + matrix.OffsetX,
  93                                           point.X * matrix.M12 + point.Y * matrix.M22 + matrix.OffsetY);
  94                 }
  95
  96                 public static Vector Subtract (Point point1, Point point2)
  97                 {
  98                         return new Vector (point1.X - point2.X, point1.Y - point2.Y);
  99                 }
 100
 101                 public static Point Subtract (Point point, Vector vector)
 102                 {
 103                         return new Point (point.X - vector.X, point.Y - vector.Y);
 104                 }
 105
 106                 /* operators */
 107
 108                 public static Vector operator -(Point point1, Point point2)
 109                 {
 110                         return Subtract (point1, point2);
 111                 }
 112
 113                 public static Point operator -(Point point, Vector vector)
 114                 {
 115                         return Subtract (point, vector);
 116                 }
 117
 118                 public static Point operator + (Point point, Vector vector)
 119                 {
 120                         return Add (point, vector);
 121                 }
 122
 123                 public static Point operator * (Point point, Matrix matrix)
 124                 {
 125                         return Multiply (point, matrix);
 126                 }
 127
 128                 public static bool operator != (Point point1, Point point2)
 129                 {
 130                         return !point1.Equals(point2);
 131                 }
 132
 133                 public static bool operator == (Point point1, Point point2)
 134                 {
 135                         return point1.Equals(point2);
 136                 }
 137
 138                 public static explicit operator Size (Point point)
 139                 {
 140                         return new Size (point.X, point.Y);
 141                 }
 142
 143                 public static explicit operator Vector (Point point)
 144                 {
 145                         return new Vector (point.X, point.Y);
 146                 }
 147
 148                 public static Point Parse (string source)
 149                 {
 150                         string[] points = source.Split(',');
 151
 152                         if (points.Length<2)
 153                                 throw new InvalidOperationException ("source does not contain two numbers");
 154                         if (points.Length > 2)
 155                                 throw new InvalidOperationException ("source contains too many delimiters");
 156
 157                         CultureInfo ci = CultureInfo.InvariantCulture;
 158                         return new Point (Convert.ToDouble(points[0],ci), Convert.ToDouble(points[1],ci));
 159                 }
 160
 161                 public override string ToString ()
 162                 {
 163                         return this.ToString(null, null);
 164                 }
 165
 166                 public string ToString (IFormatProvider formatProvider)
 167                 {
 168                         return this.ToString(null,formatProvider);
 169                 }
 170
 171                 private string ToString(string format,IFormatProvider formatProvider)
 172                 {
 173                         CultureInfo ci = (CultureInfo)formatProvider;
 174
 175                         if (ci == null)
 176                                 ci = CultureInfo.CurrentCulture;
 177                         string seperator = ci.NumberFormat.NumberDecimalSeparator;
 178                         if (seperator.Equals(","))
 179                                 seperator = ";";
 180                         else
 181                                 seperator = ",";
 182                         object[] ob = { this.x, seperator, this.y };
 183
 184                         return string.Format(formatProvider, "{0:" + format + "}{1}{2:" + format + "}", ob);
 185                 }
 186
 187                 string IFormattable.ToString (string format, IFormatProvider formatProvider)
 188                 {
 189                         return this.ToString(format, formatProvider);
 190                 }
 191
 192                 double x;
 193                 double y;
 194         }
 195 }