2 // System.Drawing.PointF.cs
5 // Mike Kestner (mkestner@speakeasy.net)
7 // Copyright (C) 2001 Mike Kestner
8 // Copyright (C) 2004 Novell, Inc. http://www.novell.com
12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35 using System.Runtime.InteropServices;
36 using System.ComponentModel;
38 namespace System.Drawing
44 // Private x and y coordinate fields.
47 // -----------------------
48 // Public Shared Members
49 // -----------------------
52 /// Empty Shared Field
56 /// An uninitialized PointF Structure.
59 public static readonly PointF Empty;
66 /// Translates a PointF using the Width and Height
67 /// properties of the given Size.
70 public static PointF operator + (PointF pt, Size sz)
72 return new PointF (pt.X + sz.Width, pt.Y + sz.Height);
80 /// Compares two PointF objects. The return value is
81 /// based on the equivalence of the X and Y properties
82 /// of the two points.
85 public static bool operator == (PointF pt_a, PointF pt_b)
87 return ((pt_a.X == pt_b.X) && (pt_a.Y == pt_b.Y));
91 /// Inequality Operator
95 /// Compares two PointF objects. The return value is
96 /// based on the equivalence of the X and Y properties
97 /// of the two points.
100 public static bool operator != (PointF pt_a, PointF pt_b)
102 return ((pt_a.X != pt_b.X) || (pt_a.Y != pt_b.Y));
106 /// Subtraction Operator
110 /// Translates a PointF using the negation of the Width
111 /// and Height properties of the given Size.
114 public static PointF operator - (PointF pt, Size sz)
116 return new PointF (pt.X - sz.Width, pt.Y - sz.Height);
119 // -----------------------
120 // Public Constructor
121 // -----------------------
124 /// PointF Constructor
128 /// Creates a PointF from a specified x,y coordinate pair.
131 public PointF (float x, float y)
137 // -----------------------
138 // Public Instance Members
139 // -----------------------
146 /// Indicates if both X and Y are zero.
150 public bool IsEmpty {
152 return ((cx == 0.0) && (cy == 0.0));
161 /// The X coordinate of the PointF.
178 /// The Y coordinate of the PointF.
195 /// Checks equivalence of this PointF and another object.
198 public override bool Equals (object o)
203 return (this == (PointF) o);
207 /// GetHashCode Method
211 /// Calculates a hashing value.
214 public override int GetHashCode ()
216 return (int) cx ^ (int) cy;
224 /// Formats the PointF as a string in coordinate notation.
227 public override string ToString ()
229 return String.Format ("{{X={0}, Y={1}}}", cx, cy);