Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / ScaleTransform.cs / 1305600 / ScaleTransform.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2001 // // File: ScaleTransform.cs //----------------------------------------------------------------------------- using System; using System.Windows; using System.Windows.Media; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Reflection; using System.Security; using System.Collections; using MS.Internal; using MS.Internal.PresentationCore; using System.Windows.Media.Animation; using System.Globalization; using System.Text; using System.Runtime.InteropServices; using System.Windows.Media.Composition; using System.Diagnostics; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media { ////// Create a scale transformation. /// public sealed partial class ScaleTransform : Transform { ////// Create a scale transformation. /// public ScaleTransform() { } ////// Create a scale transformation. /// public ScaleTransform( double scaleX, double scaleY ) { ScaleX = scaleX; ScaleY = scaleY; } ////// Create a scale transformation. /// public ScaleTransform( double scaleX, double scaleY, double centerX, double centerY ) : this(scaleX, scaleY) { CenterX = centerX; CenterY = centerY; } ////// Return the current transformation value. /// public override Matrix Value { get { ReadPreamble(); Matrix m = new Matrix(); m.ScaleAt(ScaleX, ScaleY, CenterX, CenterY); return m; } } ////// Returns true if transformation matches the identity transform. /// internal override bool IsIdentity { get { return ScaleX == 1 && ScaleY == 1 && CanFreeze; } } internal override void TransformRect(ref Rect rect) { if (rect.IsEmpty) { return; } double scaleX = ScaleX; double scaleY = ScaleY; double centerX = CenterX; double centerY = CenterY; bool translateCenter = centerX != 0 || centerY != 0; if (translateCenter) { rect.X -= centerX; rect.Y -= centerY; } rect.Scale(scaleX, scaleY); if (translateCenter) { rect.X += centerX; rect.Y += centerY; } } ////// MultiplyValueByMatrix - *result is set equal to "this" * matrixToMultiplyBy. /// /// The result is stored here. /// The multiplicand. internal override void MultiplyValueByMatrix(ref Matrix result, ref Matrix matrixToMultiplyBy) { result = Matrix.Identity; result._m11 = ScaleX; result._m22 = ScaleY; double centerX = CenterX; double centerY = CenterY; result._type = MatrixTypes.TRANSFORM_IS_SCALING; if (centerX != 0 || centerY != 0) { result._offsetX = centerX - centerX * result._m11; result._offsetY = centerY - centerY * result._m22; result._type |= MatrixTypes.TRANSFORM_IS_TRANSLATION; } MatrixUtil.MultiplyMatrix(ref result, ref matrixToMultiplyBy); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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