// Check what kind of entities can be created using the dragsource data
private bool CheckDropTarget(DragEventArgs e, out EntityViewModel entityVM)
{
EntityViewModel evm = null;
entityVM = null;
if (_draggedEntites == null)
return false;
HitTestResult htr = VisualTreeHelper.HitTest(TreeWorkArea, e.GetPosition(TreeWorkArea));
var tvItem = htr.VisualHit.FindVisualParent<TreeViewItem>();
if ( null == tvItem )
return false;
evm = tvItem.Header as EntityViewModel;
if ( null == evm )
return false;
entityVM = evm;
return _draggedEntites.All((en) => evm.Entity.Schema.SupportedEntityTypes.Contains(en));
}
ContextMenu GetContextMenu(EntityViewModel evm)
{
ContextMenu menu = new ContextMenu();
IEnumerable<string> entities;
if (evm is PackageViewModel)
{
entities = from e in EntitySchema.SchemaNames
where e != EasyInstall.EntityTypes.PACKAGEENTITY
select e;
}
else
{
entities = evm.Entity.Schema.SupportedEntityTypes;
}
// Add Entity Creation menu Items
if (entities.Count() > 0)
{
MenuItem mi = new MenuItem();
mi.Header = "Add";
foreach (var entity in entities)
{
MenuItem submi = new MenuItem();
submi.Header = entity;
submi.Command = EasyInstall.ViewModels.Commands.GetRoutedCommandForEntity(entity);
submi.CommandParameter = evm;
mi.Items.Add(submi);
}
menu.Items.Add(mi);
menu.Items.Add(new Separator());
}
// Add Delete current
if (!(evm is PackageViewModel))
{
MenuItem mi = new MenuItem();
mi.Header = "Remove";
mi.Command = EasyInstall.ViewModels.Commands.RemoveEntity;
mi.CommandParameter = evm;
menu.Items.Add(mi);
}
if ( evm is PackageViewModel )
{
MenuItem mi = new MenuItem();
mi.Header = "Build";
mi.Command = EasyInstall.ViewModels.Commands.BuildPackage;
mi.CommandParameter = evm;
menu.Items.Add(mi);
}
if (evm.Entity.SubEntities.Count() > 0)
{
MenuItem mi = new MenuItem();
mi.Header = "Remove Children";
mi.Command = EasyInstall.ViewModels.Commands.RemoveAllEntities;
mi.CommandParameter = evm;
menu.Items.Add(mi);
}
return menu;
}
private void TreeWorkArea_Selected(object sender, RoutedEventArgs e)
{
TreeWorkArea.Tag = e.OriginalSource;
CurrentEntity = (e.OriginalSource as TreeViewItem).Header as EntityViewModel;
Resources["SelectedEntity"] = CurrentEntity;
}
void GetEntityAtCursor(Point p, out TreeViewItem item, out EntityViewModel evm)
{
evm = null;
HitTestResult htr = VisualTreeHelper.HitTest(TreeWorkArea, p);
item = htr.VisualHit.FindVisualParent<TreeViewItem>();
if (item != null)
{
evm = item.Header as EntityViewModel;
}
}