void Children_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.OldItems != null)
{
foreach (var item in e.OldItems)
{
var model = (item as TileMenuItemViewModel);
var view = _childernMenuItemViews.FirstOrDefault(v => v.DataContext == model);
if (MenuCanvas.Children.Contains(view))
{
view.Dispose();
MenuCanvas.Children.Remove(view);
}
}
}
else if (e.NewItems != null)
{
foreach (var item in e.NewItems)
{
var model = (item as TileMenuItemViewModel);
TileMenuItemView menutItemView = new TileMenuItemView()
{
DataContext = model
};
_childernMenuItemViews.Add(menutItemView);
}
}
updateChildrenTargetPositions();
}
private void MenuItemView_DataContextChanged(FrameworkElement sender, DataContextChangedEventArgs args)
{
TileMenuItemViewModel model = (TileMenuItemViewModel)DataContext;
model.PropertyChanged -= model_PropertyChanged;
model.Children.CollectionChanged -= Children_CollectionChanged;
model.PropertyChanged += model_PropertyChanged;
model.Children.CollectionChanged += Children_CollectionChanged;
// initialize children
foreach (var oldChildrenViews in _childernMenuItemViews)
{
oldChildrenViews.Dispose();
if (MenuCanvas != null && MenuCanvas.Children.Contains(oldChildrenViews))
{
MenuCanvas.Children.Remove(oldChildrenViews);
}
}
_childernMenuItemViews.Clear();
foreach (var menuItemViewModel in model.Children)
{
TileMenuItemView menutItemView = new TileMenuItemView()
{
DataContext = menuItemViewModel
};
_childernMenuItemViews.Add(menutItemView);
}
updateChildrenTargetPositions();
if (model.TileMenuContentViewModel == null)
{
this.Visibility = Visibility.Collapsed;
}
else
{
if (model.TileMenuContentViewModel is InputFieldViewTileMenuContentViewModel)
{
mainGrid.Children.Clear();
mainGrid.Children.Add(new AttributeFieldView()
{
DataContext =
((InputFieldViewTileMenuContentViewModel)model.TileMenuContentViewModel).AttributeTransformationViewModel
});
}
else if (model.TileMenuContentViewModel is OperationTypeTileMenuContentViewModel)
{
mainGrid.Children.Clear();
mainGrid.Children.Add(new OperationTypeView()
{
DataContext =
((OperationTypeTileMenuContentViewModel)model.TileMenuContentViewModel).OperationTypeModel
});
}
else if (model.TileMenuContentViewModel is OperationTypeGroupTileMenuContentViewModel)
{
mainGrid.Children.Clear();
mainGrid.Children.Add(new OperationTypeView()
{
DataContext =
((OperationTypeGroupTileMenuContentViewModel)model.TileMenuContentViewModel).OperationTypeGroupModel
});
}
else if (model.TileMenuContentViewModel is InputGroupViewTileMenuContentViewModel)
{
mainGrid.Children.Clear();
mainGrid.Children.Add(new AttributeGroupView()
{
DataContext =
((InputGroupViewTileMenuContentViewModel)model.TileMenuContentViewModel).InputGroupViewModel
});
}
}
}
