public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
editorValue = value;
if ((provider != null) && (((IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService))) != null))
{
if (this.editorDialog == null)
{
this.editorDialog = new GradientColorPickerForm();
}
GradientDefinition colors = editorValue as GradientDefinition;
if (colors != null)
{
editorDialog.GradientColors = colors;
}
IntPtr focus = GetFocus();
try
{
if (editorDialog.ShowDialog() == DialogResult.OK)
{
editorValue = editorDialog.GradientColors;
}
}
finally
{
if (focus != IntPtr.Zero)
{
SetFocus(new HandleRef(null, focus));
}
}
}
value = editorValue;
editorValue = null;
return(value);
}
public RectangleShape()
{
strokeWidth = 1;
strokeColor = Color.Black;
fillColor = Color.Orange;
gradientColors = new GradientDefinition();
useGradient = false;
useStroke = false;
this.WidthInUnits = 3;
this.HeightInUnits = 1;
}
public RectangleShape()
{
strokeWidth = 1;
strokeColor = Color.Black;
fillColor = Color.Orange;
gradientColors = new GradientDefinition();
useGradient = false;
useStroke = false;
this.WidthInUnits = 3;
this.HeightInUnits = 1;
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException("destinationType");
}
if (destinationType == typeof(string))
{
GradientDefinition colors = value as GradientDefinition;
string c1 = string.Format("Color1={0};{1};{2};", colors.Color1.R, colors.Color1.G, colors.Color1.B);
string c2 = string.Format("Color2={0};{1};{2};", colors.Color2.R, colors.Color2.G, colors.Color2.B);
return(string.Format("{0} {1}", c1, c2));
}
return(base.ConvertTo(context, culture, value, destinationType));
}
public override object CreateInstance(ITypeDescriptorContext context, IDictionary propertyValues)
{
if (propertyValues == null)
{
throw new ArgumentNullException("propertyValues");
}
// we allow user to change only next gradient values:
Color c1 = (Color)propertyValues["Color1"];
Color c2 = (Color)propertyValues["Color2"];
GradientType gt = (GradientType)propertyValues["GradientType"];
GradientDefinition gd = ((RectangleShape)context.Instance).GradientDefinition;
//and another (Point1, Point2) are just copyed from instance item...
return(new GradientDefinition(c1, c2, gd.Point1, gd.Point2, gt));
}