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//------------------------------------------------------------------------------
// Microsoft Avalon
// Copyright (c) Microsoft Corporation, 2001
//
// File: TranslateTransform.cs
//------------------------------------------------------------------------------
using MS.Internal;
using MS.Internal.PresentationCore;
using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Composition;
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID;
namespace System.Windows.Media
{
#region TranslateTransform
///<summary>
/// Create a translation transformation.
///</summary>
public sealed partial class TranslateTransform : Transform
{
///<summary>
///
///</summary>
public TranslateTransform()
{
}
///<summary>
/// Create a translation transformation.
///</summary>
///<param name="offsetX">Displacement amount in x direction.</param>
///<param name="offsetY">Displacement amount in y direction.</param>
public TranslateTransform(
double offsetX,
double offsetY
)
{
X = offsetX;
Y = offsetY;
}
///<summary>
/// Return the current transformation value.
///</summary>
public override Matrix Value
{
get
{
ReadPreamble();
Matrix matrix = Matrix.Identity;
matrix.Translate(X, Y);
return matrix;
}
}
///<summary>
/// Returns true if transformation matches the identity transform.
///</summary>
internal override bool IsIdentity
{
get
{
return X == 0 && Y == 0 && CanFreeze;
}
}
#region Internal Methods
internal override void TransformRect(ref Rect rect)
{
if (!rect.IsEmpty)
{
rect.Offset(X, Y);
}
}
/// <summary>
/// MultiplyValueByMatrix - result is set equal to "this" * matrixToMultiplyBy.
/// </summary>
/// <param name="result"> The result is stored here. </param>
/// <param name="matrixToMultiplyBy"> The multiplicand. </param>
internal override void MultiplyValueByMatrix(ref Matrix result, ref Matrix matrixToMultiplyBy)
{
result = Matrix.Identity;
// Set the translate + type
result._offsetX = X;
result._offsetY = Y;
result._type = MatrixTypes.TRANSFORM_IS_TRANSLATION;
MatrixUtil.MultiplyMatrix(ref result, ref matrixToMultiplyBy);
}
#endregion Internal Methods
}
#endregion
}
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