using System;
using java.awt;
using awtjava.awt;
using geomjava.awt.geom;
using imagejava.awt.image;
namespace System.Drawing.Drawing2D{
/// <summary>
/// Summary description for LinearGradientBrush.
/// </summary>
public sealed class LinearGradientBrush : Brush {
Blend _blend;
bool _gammaCorrection;
ColorBlend _interpolationColors;
WrapMode _wrapmode;
RectangleF _gradientRectangle;
// gradient brush data
float _x1 = 0;
float _y1 = 0;
float _x2 = 0;
float _y2 = 0;
Color _color1, _color2;
bool _cyclic;
#region NativeObject
GradientPaint _nativeObject = null;
protected override Paint NativeObject {
get {
if ( _nativeObject == null )
_nativeObject = new GradientPaint(
_x1, _y1,
new java.awt.Color(_color1.R, _color1.G, _color1.B, _color1.A),
_x2, _y2,
new java.awt.Color(_color2.R, _color2.G, _color2.B, _color2.A), _cyclic);
return _nativeObject;
}
}
#endregion
#region Initialization
private void Init(float x1, float y1, Color color1, float x2, float y2, Color color2, bool cyclic) {
_x1 = x1;
_y1 = y1;
_color1 = color1;
_x2 = x2;
_y2 = y2;
_color2 = color2;
_cyclic = cyclic;
_nativeObject = null;
}
private void Init(float x1, float y1, Color color1, float x2, float y2, Color color2, float angle) {
_gradientRectangle = new RectangleF(x1, y1, x2-x1, y2-y1);
PointF [] points = GetMedianeEnclosingRect(x1, y1, x2, y2, angle);
Init(points[0].X, points[0].Y, color1, points[1].X, points[1].Y, color2, false);
}
private void Init(float x1, float y1, Color color1, float x2, float y2, Color color2, LinearGradientMode linearGradientMode) {
_gradientRectangle = new RectangleF(x1, y1, x2-x1, y2-y1);
PointF [] points;
switch (linearGradientMode) {
case LinearGradientMode.Horizontal :
Init(x1, y1, color1, x2, y1, color2, false);
break;
case LinearGradientMode.Vertical :
Init(x1, y1, color1, x1, y2, color2, false);
break;
case LinearGradientMode.BackwardDiagonal :
points = GetMedianeEnclosingRect(x1, y1, x2, y2, false);
Init(points[0].X, points[0].Y, color2, points[1].X, points[1].Y, color1, false);
break;
case LinearGradientMode.ForwardDiagonal :
points = GetMedianeEnclosingRect(x1, y1, x2, y2, true);
Init(points[0].X, points[0].Y, color1, points[1].X, points[1].Y, color2, false);
break;
default :
throw new ArgumentException("LinearGradientMode");
}
}
#endregion
#region Constructors
private LinearGradientBrush (float x1, float y1, Color color1, float x2, float y2, Color color2, bool cyclic) {
Init(x1, y1, color1, x2, y2, color2, cyclic);
}
internal LinearGradientBrush (float x1, float y1, Color color1, float x2, float y2, Color color2, LinearGradientMode mode) {
Init(x1, y1, color1, x2, y2, color2, mode);
}
internal LinearGradientBrush (float x1, float y1, Color color1, float x2, float y2, Color color2) {
Init(x1, y2, color1, x1, y2, color2, false);
}
public LinearGradientBrush (Point point1, Point point2, Color color1, Color color2) {
_gradientRectangle = new RectangleF(point1.X, point1.Y, point2.X - point1.X, point2.Y - point2.Y);
Init(point1.X, point1.Y, color1, point2.X, point2.Y, color2, false);
}
public LinearGradientBrush (PointF point1, PointF point2, Color color1, Color color2) {
_gradientRectangle = new RectangleF(point1.X, point1.Y, point2.X - point1.X, point2.Y - point2.Y);
Init(point1.X, point1.Y, color1, point2.X, point2.Y, color2, false);
}
public LinearGradientBrush (Rectangle rect, Color color1, Color color2, LinearGradientMode linearGradientMode) {
Init(rect.X, rect.Y, color1, rect.X + rect.Width, rect.Y + rect.Height, color2, linearGradientMode);
}
public LinearGradientBrush (RectangleF rect, Color color1, Color color2, LinearGradientMode linearGradientMode) {
Init(rect.X, rect.Y, color1, rect.X + rect.Width, rect.Y + rect.Height, color2, linearGradientMode);
}
public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle) {
Init(rect.X, rect.Y, color1, rect.X + rect.Width, rect.Y + rect.Height, color2, angle);
}
public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle) {
Init(rect.X, rect.Y, color1, rect.X + rect.Width, rect.Y + rect.Height, color2, angle);
}
public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle, bool isAngleScaleable):
this(rect, color1, color2, angle) {
}
public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle, bool isAngleScaleable):
this(rect, color1, color2, angle) {
}
#endregion
#region GetMedianeEnclosingRect
internal PointF [] GetMedianeEnclosingRect(float x1, float y1, float x2, float y2, float rotateAngle) {
float width = x2 - x1;
float height = y2 - y1;
PointF rectCenter = new PointF(x1 + width/2, y1 + height/2);
float gradLen = width * Math.Abs((float)Math.Cos(rotateAngle * Math.PI / 180)) +
height * Math.Abs((float)Math.Sin(rotateAngle * Math.PI / 180));
PointF [] points = new PointF []{ new PointF(rectCenter.X - gradLen/2, rectCenter.Y),
new PointF(rectCenter.X + gradLen/2, rectCenter.Y) };
Matrix mx = new Matrix();
mx.RotateAt((float)rotateAngle, rectCenter);
mx.TransformPoints(points);
return points;
}
internal PointF [] GetMedianeEnclosingRect(float x1, float y1, float x2, float y2, bool forwardDiagonal) {
float width = x2 - x1;
float height = y2 - y1;
PointF rectCenter = new PointF(x1 + width/2, y1 + height/2);
float rotateAngle = (float)Math.Atan2(width, height);
float gradLen = width * (float)Math.Cos(rotateAngle);
if (!forwardDiagonal)
rotateAngle = -rotateAngle;
PointF [] points = new PointF []{ new PointF(rectCenter.X - gradLen, rectCenter.Y),
new PointF(rectCenter.X + gradLen, rectCenter.Y) };
Matrix mx = new Matrix();
mx.RotateAt((float)rotateAngle * (float)(180/Math.PI), rectCenter);
mx.TransformPoints(points);
return points;
}
#endregion
#region Public Properties
// FALLBACK: no functionality implemented for this property
[MonoTODO]
public Blend Blend {
get {
return _blend;
}
set {
_blend = value;
}
}
// FALLBACK: no functionality implemented for this property
[MonoTODO]
public bool GammaCorrection {
get {
return _gammaCorrection;
}
set {
_gammaCorrection = value;
}
}
// FALLBACK: functionality of two color gradient is implemented
[MonoTODO]
public ColorBlend InterpolationColors {
get {
return _interpolationColors;
}
set {
if (value == null)
throw new ArgumentNullException("ColorBlend");
if ( (value.Colors == null) || (value.Colors.Length == 0) )
throw new ArgumentException("ColorBlend");
_interpolationColors = value;
_color1 = value.Colors[0];
_color2 = value.Colors[value.Colors.Length - 1];
_nativeObject = null;
}
}
public Color [] LinearColors {
get {
Color [] cl = new Color[2];
cl[0] = _color1;
cl[1] = _color2;
return cl;
}
set {
if (value == null)
throw new ArgumentNullException("colors");
_color1 = value[0];
_color2 = value[1];
_nativeObject = null;
}
}
public RectangleF Rectangle {
get {
return _gradientRectangle;
}
}
public Matrix Transform {
get { return BrushTransform; }
set { BrushTransform = value; }
}
// FALLBACK: not functionality implemented for this property
[MonoTODO]
public WrapMode WrapMode {
get {
return _wrapmode;
}
set {
_wrapmode = value;
}
}
#endregion
#region Public Methods
public void MultiplyTransform (Matrix matrix) {
BrushMultiplyTransform(matrix, MatrixOrder.Prepend);
}
public void MultiplyTransform (Matrix matrix, MatrixOrder order) {
BrushMultiplyTransform(matrix, order);
}
public void ResetTransform () {
BrushResetTransform();
}
public void RotateTransform (float angle) {
BrushRotateTransform(angle, MatrixOrder.Prepend);
}
public void RotateTransform (float angle, MatrixOrder order) {
BrushRotateTransform(angle, order);
}
public void ScaleTransform (float sx, float sy) {
BrushScaleTransform(sx, sy, MatrixOrder.Prepend);
}
public void ScaleTransform (float sx, float sy, MatrixOrder order) {
BrushScaleTransform(sx, sy, order);
}
public void SetBlendTriangularShape (float focus) {
SetBlendTriangularShape (focus, 1.0F);
}
public void SetBlendTriangularShape (float focus, float scale) {
_x2 = (_x1 + _x2) / 2;
_y2 = (_y1 + _y2) / 2;
_cyclic = true;
_nativeObject = null;
}
public void SetSigmaBellShape (float focus) {
SetSigmaBellShape (focus, 1.0F);
}
[MonoTODO]
public void SetSigmaBellShape (float focus, float scale) {
// FALLBACK: Triangle shape used
SetBlendTriangularShape (focus, scale);
}
public void TranslateTransform (float dx, float dy) {
BrushTranslateTransform (dx, dy);
}
public void TranslateTransform (float dx, float dy, MatrixOrder order) {
BrushTranslateTransform(dx, dy, order);
}
public override object Clone () {
LinearGradientBrush copy = (LinearGradientBrush)InternalClone();
if (copy._nativeObject != null)
copy._nativeObject = null;
if (_interpolationColors != null) {
copy._interpolationColors = new ColorBlend();
if (_interpolationColors.Colors != null)
copy._interpolationColors.Colors = (Color[])_interpolationColors.Colors.Clone();
if (_interpolationColors.Positions != null)
copy._interpolationColors.Positions = (float[])_interpolationColors.Positions.Clone();
}
if (_blend != null) {
copy._blend = new Blend();
if (_blend.Factors != null)
copy._blend.Factors = (float[])_blend.Factors.Clone();
if (_blend.Positions != null)
copy._blend.Positions = (float[])_blend.Positions.Clone();
}
copy.LinearColors = (Color[])LinearColors.Clone();
return copy;
}
#endregion
}
}
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