/// <summary>
/// 编辑数据
/// </summary>
/// <param name="context">参数</param>
/// <param name="provider">参数</param>
/// <param name="value">旧数据</param>
/// <returns>编辑后的新数据</returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
if (editor != null)
{
XColorValue xc = value as XColorValue;
Color oldColor = xc == null ? Color.Empty : xc.Value;
Color newColor = (Color)editor.EditValue(context, provider, oldColor);
if (oldColor.Equals(newColor) == false)
{
return(new XColorValue(newColor));
}
else
{
return(value);
}
}
else
{
using (ColorDialog dlg = new ColorDialog())
{
XColorValue xc = value as XColorValue;
if (xc != null)
{
dlg.Color = xc.Value;
if (dlg.ShowDialog() == DialogResult.OK)
{
return(new XColorValue(dlg.Color));
}
}
}
}
return(value);
}
/// <summary>
/// 复制对象
/// </summary>
/// <returns>复制品</returns>
object ICloneable.Clone()
{
XColorValue v = new XColorValue();
v._Value = this._Value;
return(v);
}
/// <summary>
/// 绘制数据
/// </summary>
/// <param name="e">参数</param>
public override void PaintValue(PaintValueEventArgs e)
{
XColorValue color = e.Value as XColorValue;
if (color == null)
{
color = new XColorValue();
}
using (SolidBrush b = new SolidBrush(color.Value))
{
e.Graphics.FillRectangle(b, e.Bounds);
}
}
/// <summary>
/// 将颜色值转换为指定的类型的数据
/// </summary>
/// <param name="context">参数</param>
/// <param name="culture">参数</param>
/// <param name="value">颜色值</param>
/// <param name="destinationType">指定的数据类型</param>
/// <returns>转换结果</returns>
public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
{
XColorValue xc = value as XColorValue;
if (destinationType.Equals(typeof(string)))
{
return(xc == null ? null : xc.StringValue);
}
else if (destinationType.Equals(typeof(Color)))
{
return(xc == null ? Color.Empty : xc.Value);
}
else if (destinationType.Equals(typeof(InstanceDescriptor)))
{
return(new InstanceDescriptor(
typeof(XColorValue).GetConstructor(new Type[] { typeof(string) }),
new object[] { xc.StringValue }));
}
return(null);
}
