public virtual void OnToggleButtonIsCheckedChanged(object sender, RoutedEventArgs e)
{
ToggleButton button = e.OriginalSource as ToggleButton;
if (button != null)
{
PropertyGridItem item = button.DataContext as PropertyGridItem;
if (item != null && item.Property != null && item.Property.IsEnum && item.Property.IsFlagsEnum)
{
if (button.IsChecked.HasValue)
{
ulong itemValue = PropertyGridComboBoxExtension.EnumToUInt64(item.Property, item.Value);
ulong propertyValue = PropertyGridComboBoxExtension.EnumToUInt64(item.Property, item.Property.Value);
ulong newValue;
if (button.IsChecked.Value)
{
if (itemValue == 0)
{
newValue = 0;
}
else
{
newValue = propertyValue | itemValue;
}
}
else
{
newValue = propertyValue & ~itemValue;
}
object propValue = PropertyGridComboBoxExtension.EnumToObject(item.Property, newValue);
item.Property.Value = propValue;
ListBoxItem li = button.GetVisualSelfOrParent <ListBoxItem>();
if (li != null)
{
ItemsControl parent = ItemsControl.ItemsControlFromItemContainer(li);
if (parent != null)
{
if (button.IsChecked.Value && itemValue == 0)
{
foreach (PropertyGridItem gridItem in parent.Items.OfType <PropertyGridItem>())
{
gridItem.IsChecked = PropertyGridComboBoxExtension.EnumToUInt64(item.Property, gridItem.Value) == 0;
}
}
else
{
foreach (PropertyGridItem gridItem in parent.Items.OfType <PropertyGridItem>())
{
ulong gridItemValue = PropertyGridComboBoxExtension.EnumToUInt64(item.Property, gridItem.Value);
if (gridItemValue == 0)
{
gridItem.IsChecked = newValue == 0;
continue;
}
gridItem.IsChecked = (newValue & gridItemValue) == gridItemValue;
}
}
}
}
}
}
}
}