コード例 #1
0
        protected override void OnDrop(DragEventArgs e)
        {
            base.OnDrop(e);
            DragObject dragObject = e.Data.GetData(typeof(DragObject)) as DragObject;

            if (dragObject != null && !String.IsNullOrEmpty(dragObject.Xaml))
            {
                DesignerItem newItem = null;
                Object       content = XamlReader.Load(XmlReader.Create(new StringReader(dragObject.Xaml)));

                if (content != null)
                {
                    newItem         = new DesignerItem();
                    newItem.Content = content;

                    Point position = e.GetPosition(this);

                    if (dragObject.DesiredSize.HasValue)
                    {
                        Size desiredSize = dragObject.DesiredSize.Value;
                        newItem.Width  = desiredSize.Width;
                        newItem.Height = desiredSize.Height;

                        DesignerCanvas.SetLeft(newItem, Math.Max(0, position.X - newItem.Width / 2));
                        DesignerCanvas.SetTop(newItem, Math.Max(0, position.Y - newItem.Height / 2));
                    }
                    else
                    {
                        DesignerCanvas.SetLeft(newItem, Math.Max(0, position.X));
                        DesignerCanvas.SetTop(newItem, Math.Max(0, position.Y));
                    }

                    this.Children.Add(newItem);

                    //update selection
                    foreach (ISelectable item in this.SelectedItems)
                    {
                        item.IsSelected = false;
                    }
                    SelectedItems.Clear();
                    newItem.IsSelected = true;
                    this.SelectedItems.Add(newItem);
                }

                e.Handled = true;
            }
        }
コード例 #2
0
        void DesignerItem_Loaded(object sender, RoutedEventArgs e)
        {
            // if DragThumbTemplate and ConnectorDecoratorTemplate properties of this class
            // are set these templates are applied;
            // Note: this method is only executed when the Loaded event is fired, so
            // setting DragThumbTemplate or ConnectorDecoratorTemplate properties after
            // will have no effect.
            if (Template != null)
            {
                ContentPresenter contentPresenter = Template.FindName("PART_ContentPresenter", this) as ContentPresenter;
                if (contentPresenter != null)
                {
                    UIElement contentVisual = VisualTreeHelper.GetChild(contentPresenter, 0) as UIElement;
                    if (contentVisual != null)
                    {
                        DragThumb thumb = Template.FindName("PART_DragThumb", this) as DragThumb;
                        Control   connectorDecorator = Template.FindName("PART_ConnectorDecorator", this) as Control;

                        if (thumb != null)
                        {
                            ControlTemplate template =
                                DesignerItem.GetDragThumbTemplate(contentVisual) as ControlTemplate;
                            if (template != null)
                            {
                                thumb.Template = template;
                            }
                        }


                        if (connectorDecorator != null)
                        {
                            ControlTemplate template =
                                DesignerItem.GetConnectorDecoratorTemplate(contentVisual) as ControlTemplate;
                            if (template != null)
                            {
                                connectorDecorator.Template = template;
                            }
                        }
                    }
                }
            }
        }