Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / System / Windows / Size.cs / 1305600 / Size.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2001, 2002 // // File: Size.cs //----------------------------------------------------------------------------- using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Reflection; using System.Text; using System.Collections; using System.Globalization; using System.Windows; using System.Windows.Media; using System.Runtime.InteropServices; using MS.Internal.WindowsBase; namespace System.Windows { ////// Size - A value type which defined a size in terms of non-negative width and height /// public partial struct Size { #region Constructors ////// Constructor which sets the size's initial values. Width and Height must be non-negative /// /// double - The initial Width /// double - THe initial Height public Size(double width, double height) { if (width < 0 || height < 0) { throw new System.ArgumentException(SR.Get(SRID.Size_WidthAndHeightCannotBeNegative)); } _width = width; _height = height; } #endregion Constructors #region Statics ////// Empty - a static property which provides an Empty size. Width and Height are /// negative-infinity. This is the only situation /// where size can be negative. /// public static Size Empty { get { return s_empty; } } #endregion Statics #region Public Methods and Properties ////// IsEmpty - this returns true if this size is the Empty size. /// Note: If size is 0 this Size still contains a 0 or 1 dimensional set /// of points, so this method should not be used to check for 0 area. /// public bool IsEmpty { get { return _width < 0; } } ////// Width - Default is 0, must be non-negative /// public double Width { get { return _width; } set { if (IsEmpty) { throw new System.InvalidOperationException(SR.Get(SRID.Size_CannotModifyEmptySize)); } if (value < 0) { throw new System.ArgumentException(SR.Get(SRID.Size_WidthCannotBeNegative)); } _width = value; } } ////// Height - Default is 0, must be non-negative. /// public double Height { get { return _height; } set { if (IsEmpty) { throw new System.InvalidOperationException(SR.Get(SRID.Size_CannotModifyEmptySize)); } if (value < 0) { throw new System.ArgumentException(SR.Get(SRID.Size_HeightCannotBeNegative)); } _height = value; } } #endregion Public Methods #region Public Operators ////// Explicit conversion to Vector. /// ////// Vector - A Vector equal to this Size /// /// Size - the Size to convert to a Vector public static explicit operator Vector(Size size) { return new Vector(size._width, size._height); } ////// Explicit conversion to Point /// ////// Point - A Point equal to this Size /// /// Size - the Size to convert to a Point public static explicit operator Point(Size size) { return new Point(size._width, size._height); } #endregion Public Operators #region Private Methods static private Size CreateEmptySize() { Size size = new Size(); // We can't set these via the property setters because negatives widths // are rejected in those APIs. size._width = Double.NegativeInfinity; size._height = Double.NegativeInfinity; return size; } #endregion Private Methods #region Private Fields private readonly static Size s_empty = CreateEmptySize(); #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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