public override bool Equals(object o)
{
bool result = false;
if (o is ZoomboxView)
{
ZoomboxView other = (ZoomboxView)o;
if (this.ViewKind == other.ViewKind)
{
switch (this.ViewKind)
{
case ZoomboxViewKind.Absolute:
result = (DoubleHelper.AreVirtuallyEqual(_scaleWidth, other._scaleWidth)) &&
(DoubleHelper.AreVirtuallyEqual(Position, other.Position));
break;
case ZoomboxViewKind.Region:
result = DoubleHelper.AreVirtuallyEqual(Region, other.Region);
break;
default:
result = true;
break;
}
}
}
return(result);
}
public override object ConvertTo(
ITypeDescriptorContext typeDescriptorContext,
CultureInfo cultureInfo,
object value,
Type destinationType)
{
object result = null;
ZoomboxView view = value as ZoomboxView;
if (view != null)
{
if (destinationType == typeof(string))
{
result = "Empty";
switch (view.ViewKind)
{
case ZoomboxViewKind.Absolute:
if (PointHelper.IsEmpty(view.Position))
{
if (!DoubleHelper.IsNaN(view.Scale))
{
result = view.Scale.ToString();
}
}
else if (DoubleHelper.IsNaN(view.Scale))
{
result = view.Position.X.ToString() + "," + view.Position.Y.ToString();
}
else
{
result = view.Scale.ToString() + ","
+ view.Position.X.ToString() + ","
+ view.Position.Y.ToString();
}
break;
case ZoomboxViewKind.Center:
result = "Center";
break;
case ZoomboxViewKind.Fill:
result = "Fill";
break;
case ZoomboxViewKind.Fit:
result = "Fit";
break;
case ZoomboxViewKind.Region:
result = view.Region.X.ToString() + ","
+ view.Region.Y.ToString() + ","
+ view.Region.Width.ToString() + ","
+ view.Region.Height.ToString();
break;
}
}
}
return(result == null ? base.ConvertTo(typeDescriptorContext, cultureInfo, value, destinationType) : result);
}
public override object ConvertFrom(
ITypeDescriptorContext typeDescriptorContext,
CultureInfo cultureInfo,
object value)
{
ZoomboxView result = null;
if (value is double)
{
result = new ZoomboxView((double)value);
}
else if (value is Point)
{
result = new ZoomboxView((Point)value);
}
else if (value is Rect)
{
result = new ZoomboxView((Rect)value);
}
else if (value is string)
{
if (string.IsNullOrEmpty((value as string).Trim()))
{
result = ZoomboxView.Empty;
}
else
{
switch ((value as string).Trim().ToLower())
{
case "center":
result = ZoomboxView.Center;
break;
case "empty":
result = ZoomboxView.Empty;
break;
case "fill":
result = ZoomboxView.Fill;
break;
case "fit":
result = ZoomboxView.Fit;
break;
default:
// parse double values; respect the following separators: ' ', ';', or ','
List <double> values = new List <double>();
foreach (string token in (value as string).Split(new char[] { ' ', ';', ',' }, StringSplitOptions.RemoveEmptyEntries))
{
double d;
if (double.TryParse(token, out d))
{
values.Add(d);
}
if (values.Count >= 4)
{
// disregard additional values
break;
}
}
switch (values.Count)
{
case 1: // scale
result = new ZoomboxView(values[0]);
break;
case 2: // x, y
result = new ZoomboxView(values[0], values[1]);
break;
case 3: // scale, x, y
result = new ZoomboxView(values[0], values[1], values[2]);
break;
case 4: // x, y, width, height
result = new ZoomboxView(values[0], values[1], values[2], values[3]);
break;
}
break;
}
}
}
return(result == null ? base.ConvertFrom(typeDescriptorContext, cultureInfo, value) : result);
}