private static void OnOrientationPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
WrapPanel source = ( WrapPanel )d;
Orientation value = ( Orientation )e.NewValue;
// Ignore the change if requested
if (source._ignorePropertyChange)
{
source._ignorePropertyChange = false;
return;
}
// Validate the Orientation
if ((value != Orientation.Horizontal) &&
(value != Orientation.Vertical))
{
// Reset the property to its original state before throwing
source._ignorePropertyChange = true;
source.SetValue(OrientationProperty, ( Orientation )e.OldValue);
string message = string.Format(
CultureInfo.InvariantCulture,
"Properties.Resources.WrapPanel_OnOrientationPropertyChanged_InvalidValue",
value);
throw new ArgumentException(message, "value");
}
// Orientation affects measuring.
source.InvalidateMeasure();
}
private static void OnItemHeightOrWidthPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
WrapPanel source = ( WrapPanel )d;
double value = ( double )e.NewValue;
// Ignore the change if requested
if (source._ignorePropertyChange)
{
source._ignorePropertyChange = false;
return;
}
// Validate the length (which must either be NaN or a positive,
// finite number)
if (!double.IsNaN(value) && ((value <= 0.0) || double.IsPositiveInfinity(value)))
{
// Reset the property to its original state before throwing
source._ignorePropertyChange = true;
source.SetValue(e.Property, ( double )e.OldValue);
string message = string.Format(
CultureInfo.InvariantCulture,
"Properties.Resources.WrapPanel_OnItemHeightOrWidthPropertyChanged_InvalidValue",
value);
throw new ArgumentException(message, "value");
}
// The length properties affect measuring.
source.InvalidateMeasure();
}