using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.ComponentModel;
namespace Svg
{
///
/// Represents a colour stop in a gradient.
///
[SvgElement("stop")]
public class SvgGradientStop : SvgElement
{
private SvgUnit _offset;
private SvgPaintServer _colour;
private float _opacity;
///
/// Gets or sets the offset, i.e. where the stop begins from the beginning, of the gradient stop.
///
[SvgAttribute("offset")]
public SvgUnit Offset
{
get { return this._offset; }
set
{
SvgUnit unit = value;
if (value.Type == SvgUnitType.Percentage)
{
if (value.Value > 100)
{
unit = new SvgUnit(value.Type, 100);
}
else if (value.Value < 0)
{
unit = new SvgUnit(value.Type, 0);
}
}
else if (value.Type == SvgUnitType.User)
{
if (value.Value > 1)
{
unit = new SvgUnit(value.Type, 1);
}
else if (value.Value < 0)
{
unit = new SvgUnit(value.Type, 0);
}
}
this._offset = unit.ToPercentage();
}
}
///
/// Gets or sets the colour of the gradient stop.
///
[SvgAttribute("stop-color")]
[TypeConverter(typeof(SvgPaintServerFactory))]
public SvgPaintServer Colour
{
get { return this._colour; }
set { this._colour = value; }
}
///
/// Gets or sets the opacity of the gradient stop (0-1).
///
[SvgAttribute("stop-opacity")]
public float Opacity
{
get { return this._opacity; }
set { this._opacity = value; }
}
///
/// Initializes a new instance of the class.
///
public SvgGradientStop()
{
this._offset = new SvgUnit(0.0f);
this._colour = SvgColourServer.NotSet;
this._opacity = 1.0f;
}
///
/// Initializes a new instance of the class.
///
/// The offset.
/// The colour.
public SvgGradientStop(SvgUnit offset, Color colour)
{
this._offset = offset;
this._colour = new SvgColourServer(colour);
this._opacity = 1.0f;
}
public Color GetColor(SvgElement parent)
{
var core = SvgDeferredPaintServer.TryGet(_colour, parent);
if (core == null) throw new InvalidOperationException("Invalid paint server for gradient stop detected.");
return core.Colour;
}
public override SvgElement DeepCopy()
{
return DeepCopy();
}
public override SvgElement DeepCopy()
{
var newObj = base.DeepCopy() as SvgGradientStop;
newObj.Offset = this.Offset;
newObj.Colour = this.Colour;
newObj.Opacity = this.Opacity;
return newObj;
}
}
}