protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
{
// Call base OnRender() method to paint defined Plots.
base.OnRender(chartControl, chartScale);
// Store previous AA mode
SharpDX.Direct2D1.AntialiasMode oldAntialiasMode = RenderTarget.AntialiasMode;
RenderTarget.AntialiasMode = SharpDX.Direct2D1.AntialiasMode.PerPrimitive;
// Create Linear Graient Brush Properties
SharpDX.Direct2D1.LinearGradientBrushProperties lgbProps = new SharpDX.Direct2D1.LinearGradientBrushProperties();
lgbProps.StartPoint = new SharpDX.Vector2(0, (float)chartScale.GetYByValue(2900));
lgbProps.EndPoint = new SharpDX.Vector2(0, (float)chartScale.GetYByValue(2850));
// Create Gradient Stop1 for the Gradient Stop Collection
SharpDX.Direct2D1.GradientStop stop1;
stop1.Color = SharpDX.Color.DarkSalmon;
stop1.Position = 0;
// Create Gradient Stop2 for the Gradient Stop Collection
SharpDX.Direct2D1.GradientStop stop2;
stop2.Color = SharpDX.Color.DarkGreen;
stop2.Position = 1;
// Create GradientStop array for GradientStopCollection
SharpDX.Direct2D1.GradientStop[] lgbStops = new SharpDX.Direct2D1.GradientStop[] { stop1, stop2 };
// Make our GradientStopCollection
SharpDX.Direct2D1.GradientStopCollection lgbSGC = new SharpDX.Direct2D1.GradientStopCollection(RenderTarget, lgbStops);
// Finally, create the LinearGradientBrush
SharpDX.Direct2D1.LinearGradientBrush lgBrush = new SharpDX.Direct2D1.LinearGradientBrush(RenderTarget, lgbProps, lgbSGC);
// Render Draw Method here
RenderTarget.FillEllipse(new SharpDX.Direct2D1.Ellipse(new SharpDX.Vector2(ChartPanel.W / 2, ChartPanel.H / 2), ChartPanel.W / 2, ChartPanel.H / 2), lgBrush);
// This exmaple describes implementation in OnRender(), for more effieceny, dipose and recreate class level RenderTarget dependant objects in OnRederTargetStateChange()
lgbSGC.Dispose();
lgBrush.Dispose();
// Reset AA mode.
RenderTarget.AntialiasMode = oldAntialiasMode;
}
/// <summary>
/// Creates an <see cref="SharpDX.Direct2D1.LinearGradientBrush"/> that contains the specified gradient stops and has the specified transform and base opacity.
/// </summary>
/// <param name="renderTarget">an instance of <see cref = "SharpDX.Direct2D1.RenderTarget" /></param>
/// <param name="linearGradientBrushProperties">The start and end points of the gradient.</param>
/// <param name="brushProperties">The transform and base opacity of the new brush, or NULL. If this value is NULL, the brush defaults to a base opacity of 1.0f and the identity matrix as its transformation.</param>
/// <param name="gradientStopCollection">A collection of <see cref="SharpDX.Direct2D1.GradientStop"/> structures that describe the colors in the brush's gradient and their locations along the gradient line.</param>
/// <unmanaged>HRESULT CreateLinearGradientBrush([In] const D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES* linearGradientBrushProperties,[In, Optional] const D2D1_BRUSH_PROPERTIES* brushProperties,[In] ID2D1GradientStopCollection* gradientStopCollection,[Out] ID2D1LinearGradientBrush** linearGradientBrush)</unmanaged>
public LinearGradientBrush(RenderTarget renderTarget, SharpDX.Direct2D1.LinearGradientBrushProperties linearGradientBrushProperties, SharpDX.Direct2D1.BrushProperties?brushProperties, SharpDX.Direct2D1.GradientStopCollection gradientStopCollection) : base(IntPtr.Zero)
{
renderTarget.CreateLinearGradientBrush(linearGradientBrushProperties, brushProperties, gradientStopCollection, this);
}
/// <summary>
/// Creates an <see cref="SharpDX.Direct2D1.LinearGradientBrush"/> that contains the specified gradient stops and has the specified transform and base opacity.
/// </summary>
/// <param name="renderTarget">an instance of <see cref = "SharpDX.Direct2D1.RenderTarget" /></param>
/// <param name="linearGradientBrushProperties">The start and end points of the gradient.</param>
/// <param name="gradientStopCollection">A collection of <see cref="SharpDX.Direct2D1.GradientStop"/> structures that describe the colors in the brush's gradient and their locations along the gradient line.</param>
/// <unmanaged>HRESULT CreateLinearGradientBrush([In] const D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES* linearGradientBrushProperties,[In, Optional] const D2D1_BRUSH_PROPERTIES* brushProperties,[In] ID2D1GradientStopCollection* gradientStopCollection,[Out] ID2D1LinearGradientBrush** linearGradientBrush)</unmanaged>
public LinearGradientBrush(RenderTarget renderTarget, SharpDX.Direct2D1.LinearGradientBrushProperties linearGradientBrushProperties, SharpDX.Direct2D1.GradientStopCollection gradientStopCollection) : this(renderTarget, linearGradientBrushProperties, null, gradientStopCollection)
{
}
public static SharpDX.Direct2D1.Brush ToBrush(DUIRenderTarget renderTarget, Brush brush, SharpDX.Direct2D1.LinearGradientBrushProperties linearGradientBrushProperties)
{
if (brush is LinearGradientBrush lgb)
{
linearGradientBrushProperties.StartPoint = ToVector2(lgb.Rectangle.Location);
linearGradientBrushProperties.EndPoint = new SharpDX.Mathematics.Interop.RawVector2(lgb.Rectangle.Right, lgb.Rectangle.Bottom);
SharpDX.Direct2D1.GradientStop gradientStop1 = new SharpDX.Direct2D1.GradientStop()
{
Color = ToColor4(lgb.LinearColors[0]), Position = 0
};
SharpDX.Direct2D1.GradientStop gradientStop2 = new SharpDX.Direct2D1.GradientStop()
{
Color = ToColor4(lgb.LinearColors[1]), Position = 1
};
SharpDX.Direct2D1.GradientStop[] gradientStops = new SharpDX.Direct2D1.GradientStop[2] {
gradientStop1, gradientStop2
};
using (SharpDX.Direct2D1.GradientStopCollection gradientStopCollection = new SharpDX.Direct2D1.GradientStopCollection(renderTarget, gradientStops))
{
return(new SharpDX.Direct2D1.LinearGradientBrush(renderTarget, linearGradientBrushProperties, gradientStopCollection));
}
}
return(null);
}
