public virtual void OnDropCompleted(IDataObject obj, Point dropPoint)
{
var targetElement = TargetElement as FrameworkElement;
if (targetElement == null)
{
return;
}
var targetListBox = targetElement.FindLogicalAncestorByType <ListBox>();
if (targetListBox == null)
{
return;
}
var targetGroup = SystemAssaultScreen.GetAssaultGroup(targetListBox);
if (targetGroup == AssaultGroup.Invalid || targetGroup == AssaultGroup.Destroyed)
{
return;
}
ICommand dropCommand;
List <CombatUnit> draggedUnits;
if (!CanDrop(obj, out draggedUnits, out dropCommand))
{
return;
}
if (!draggedUnits.All(o => dropCommand.CanExecute(o)))
{
return;
}
draggedUnits.ForEach(o => dropCommand.Execute(o));
}
private bool CanDrop(IDataObject obj, out List <CombatUnit> draggedUnits, out ICommand dropCommand)
{
dropCommand = null;
draggedUnits = new List <CombatUnit>();
var targetElement = TargetElement as FrameworkElement;
if (targetElement == null)
{
return(false);
}
var targetListBox = targetElement.FindLogicalAncestorByType <ListBox>();
if (targetListBox == null)
{
return(false);
}
var view = targetElement.FindLogicalAncestorByType <SystemAssaultScreen>();
if (view == null || view.Model == null)
{
return(false);
}
var sourceElement = ExtractElement(obj) as DependencyObject;
if (sourceElement == null)
{
return(false);
}
var assaultGroup = SystemAssaultScreen.GetAssaultGroup(targetListBox);
var sourceListBox = sourceElement as ListBox;
if (sourceListBox == null)
{
sourceListBox = sourceElement.FindLogicalAncestorByType <ListBox>();
if (sourceListBox == null)
{
return(false);
}
draggedUnits.AddRange(sourceListBox.SelectedItems.OfType <CombatUnit>().Where(o => !o.IsDestroyed));
}
else
{
var combatUnit = sourceElement.GetValue(FrameworkElement.DataContextProperty) as CombatUnit;
if (combatUnit == null || combatUnit.IsDestroyed)
{
return(false);
}
draggedUnits.Add(combatUnit);
}
if (draggedUnits.Count == 0)
{
return(false);
}
switch (assaultGroup)
{
case AssaultGroup.Invalid:
goto default;
case AssaultGroup.Standby:
dropCommand = view.Model.StandbyOrderCommand;
break;
case AssaultGroup.Attack:
dropCommand = view.Model.AttackOrderCommand;
break;
case AssaultGroup.LandTroops:
dropCommand = view.Model.LandTroopsOrderCommand;
return(!draggedUnits.Select(o => o.Source).OfType <Ship>().Any(o => o.ShipType != ShipType.Transport));
case AssaultGroup.Destroyed:
goto default;
default:
return(false);
}
return(true);
}
