public void UpdateSelection(OptionValueChangedEventArgs e)
{
if (e == null)
{
return;
}
if (inUpdate)
{
return;
}
// if (!optionItem.IsAlive) {
// return;
// }
// IOptionItem oi = (IOptionItem)optionItem.Target;
object value = e.NewValue;
if (value == OptionItem.VALUE_UNDEFINED)
{
//no change
return;
}
try {
inUpdate = true;
//lock selection for the duration of our update
selection.BeginValueUpdate();
ICollection <IPropertyItemDescriptor <T> > descriptors;
descriptors = selection.Selection;
bool hasChanged = false;
foreach (IPropertyItemDescriptor <T> descriptor in descriptors)
{
//get the propertyItem from the current lookup
IPropertyMap map = descriptor.Properties;
if (map == null)
{
continue;
}
//get value from current selection item
IPropertyItem item = map.GetEntry(virtualPropertyName);
IValueSetter setter = item != null ? item.Setter : null;
if (setter == null || !setter.CanSet())
{
continue;
}
setter.SetValue(value);
hasChanged = true;
}
if (hasChanged)
{
selection.UpdateSelectedItems();
}
} finally {
selection.EndValueUpdate();
inUpdate = false;
}
}
public void SetValue(object value)
{
T1 newInstance = parent.parent.CreateCopy(parent, parent.CurrentInstance);
parent.SetTempInstance(newInstance);
try {
if (setter.CanSet())
{
setter.SetValue(value);
}
else
{
return; // don't commit it.
}
} finally {
parent.ResetTempInstance();
}
parent.SetNewInstance(newInstance);
}
///<inheritdoc/>
public virtual OptionItemValidities CheckValidity(ISelectionProvider <T> selection)
{
if (selection.Selection.Count == 0)
{
return(OptionItemValidities.Invalid);
}
OptionItemValidities retval = OptionItemValidities.ReadWrite;
foreach (IPropertyItemDescriptor <T> descriptor in selection.Selection)
{
IPropertyMap map = descriptor.Properties;
if (map == null)
{
return(OptionItemValidities.Invalid);
}
IPropertyItem item = map.GetEntry(virtualPropertyName);
if (item != null)
{
IValueGetter getter = item.Getter;
IValueSetter setter = item.Setter;
if (getter != null && getter.CanGet())
{
if (setter == null || !setter.CanSet())
{
//readonly item...
retval = OptionItemValidities.ReadOnly;
}
}
else
{
//we can't even get the values :-(
return(OptionItemValidities.Invalid);
}
}
else
{
return(OptionItemValidities.Invalid);
}
}
return(retval);
}
public bool CanSet()
{
return(setter != null && setter.CanSet());
}
