mcs/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
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   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                         if (source == null)
 151                                 throw new ArgumentNullException ("source");
 152                         var tokenizer = new NumericListTokenizer (source, CultureInfo.InvariantCulture);
 153                         double x;
 154                         double y;
 155                         if (!double.TryParse (tokenizer.GetNextToken (), NumberStyles.Float, CultureInfo.InvariantCulture, out x) ||
 156                             !double.TryParse (tokenizer.GetNextToken (), NumberStyles.Float, CultureInfo.InvariantCulture, out y))
 157                         {
 158                                 throw new FormatException (string.Format ("Invalid Point format: {0}", source));
 159                         }
 160                         if (!tokenizer.HasNoMoreTokens ())
 161                         {
 162                                 throw new InvalidOperationException ("Invalid Point format: " + source);
 163                         }
 164                         return new Point(x, y);
 165                 }
 166
 167                 public override string ToString ()
 168                 {
 169                         return this.ToString(null, null);
 170                 }
 171
 172                 public string ToString (IFormatProvider provider)
 173                 {
 174                         return this.ToString(null, provider);
 175                 }
 176
 177                 private string ToString(string format,IFormatProvider formatProvider)
 178                 {
 179                         if (formatProvider == null)
 180                                 formatProvider = CultureInfo.CurrentCulture;
 181                         if (format == null)
 182                                 format = string.Empty;
 183                         var separator = NumericListTokenizer.GetSeparator (formatProvider);
 184                         var pointFormat  = string.Format ("{{0:{0}}}{1}{{1:{0}}}", format, separator);
 185                         return string.Format (formatProvider, pointFormat, _x, _y);
 186                 }
 187
 188                 string IFormattable.ToString (string format, IFormatProvider formatProvider)
 189                 {
 190                         return this.ToString(format, formatProvider);
 191                 }
 192
 193                 double _x;
 194                 double _y;
 195         }
 196 }