示例#1
0
        private void OnChildRemoved(TreeGridElement child)
        {
            // Clear the model for the child
            child.SetModel(null);

            // Notify the model that a child was removed from the item
            Model?.OnChildRemoved(child);
        }
示例#2
0
        private void OnChildReplaced(TreeGridElement oldChild, object item, int index)
        {
            // Verify the new child
            TreeGridElement child = VerifyItem(item);

            // Clear the model for the old child
            oldChild.SetModel(null);

            // Notify the model that a child was replaced
            Model?.OnChildReplaced(oldChild, child, index);
        }
示例#3
0
        private void OnChildAdded(object item)
        {
            // Verify the new child
            TreeGridElement child = VerifyItem(item);

            // Set the model for the child
            child.SetModel(Model, this);

            // Notify the model that a child was added to the item
            Model?.OnChildAdded(child);
        }
示例#4
0
        internal void SetModel(TreeGridModel model, TreeGridElement parent = null)
        {
            // Set the element information
            Model  = model;
            Parent = parent;
            Level  = ((parent != null) ? parent.Level + 1 : 0);

            // Iterate through all child elements
            foreach (TreeGridElement child in Children)
            {
                // Set the model for the child
                child.SetModel(model, this);
            }
        }
示例#5
0
        private static void OnIsExpandedChanged(DependencyObject element, DependencyPropertyChangedEventArgs args)
        {
            // Get the tree item
            TreeGridElement item = (TreeGridElement)element;

            // Is the item being expanded?
            if ((bool)args.NewValue)
            {
                // Raise expanding event
                item.RaiseEvent(new RoutedEventArgs(ExpandingEvent, item));

                // Execute derived expanding handler
                item.OnExpanding();

                // Expand the item in the model
                item.Model?.Expand(item);

                // Raise expanded event
                item.RaiseEvent(new RoutedEventArgs(ExpandedEvent, item));

                // Execute derived expanded handler
                item.OnExpanded();
            }
            else
            {
                // Raise collapsing event
                item.RaiseEvent(new RoutedEventArgs(CollapsingEvent, item));

                // Execute derived collapsing handler
                item.OnCollapsing();

                // Collapse the item in the model
                item.Model?.Collapse(item);

                // Raise collapsed event
                item.RaiseEvent(new RoutedEventArgs(CollapsedEvent, item));

                // Execute derived collapsed handler
                item.OnCollapsed();
            }
        }