private void DragLeft(double scale, DesignerItem item, SelectionService selectionService)
{
IEnumerable<DesignerItem> groupItems = selectionService.GetGroupMembers(item).Cast<DesignerItem>();
double groupLeft = Canvas.GetLeft(item) + item.Width;
foreach (DesignerItem groupItem in groupItems)
{
double groupItemLeft = Canvas.GetLeft(groupItem);
double delta = (groupLeft - groupItemLeft) * (scale - 1);
Canvas.SetLeft(groupItem, groupItemLeft - delta);
groupItem.Width = groupItem.ActualWidth * scale;
}
}
protected override void OnDrop(DragEventArgs e)
{
base.OnDrop(e);
ToolboxItemDragObject dragObject = e.Data.GetData(typeof(ToolboxItemDragObject)) as ToolboxItemDragObject;
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));
}
Canvas.SetZIndex(newItem, this.Children.Count);
this.Children.Add(newItem);
SetConnectorTemplate(newItem);
//update selection
this.SelectionService.SelectItem(newItem);
newItem.Focus();
}
e.Handled = true;
}
}
protected override void OnDrop(DragEventArgs e)
{
base.OnDrop(e);
ToolboxItemDragObject dragObject = e.Data.GetData(typeof(ToolboxItemDragObject)) as ToolboxItemDragObject;
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));
}
Canvas.SetZIndex(newItem, this.Children.Count);
this.Children.Add(newItem);
SetConnectorTemplate(newItem);
//update selection
this.SelectionService.SelectItem(newItem);
newItem.Focus();
}
e.Handled = true;
}
}
private void SetConnectorTemplate(DesignerItem item)
{
if (item.ApplyTemplate() && item.Content is UIElement)
{
ControlTemplate template = DesignerItem.GetConnectorDecoratorTemplate(item.Content as UIElement);
Control decorator = item.Template.FindName("PART_ConnectorDecorator", item) as Control;
if (decorator != null && template != null)
{
decorator.Template = template;
}
template = DesignerItem.GetResizeDecoratorTemplate(item.Content as UIElement);
decorator = item.Template.FindName("PART_ResizeDecorator", item) as Control;
if (decorator != null && template != null)
{
decorator.Template = template;
}
}
}
private void SetConnectorTemplate(DesignerItem item)
{
if (item.ApplyTemplate() && item.Content is UIElement)
{
ControlTemplate template = DesignerItem.GetConnectorDecoratorTemplate(item.Content as UIElement);
Control decorator = item.Template.FindName("PART_ConnectorDecorator", item) as Control;
if (decorator != null && template != null)
decorator.Template = template;
template = DesignerItem.GetResizeDecoratorTemplate(item.Content as UIElement);
decorator = item.Template.FindName("PART_ResizeDecorator", item) as Control;
if (decorator != null && template != null)
decorator.Template = template;
}
}
private void DragTop(double scale, DesignerItem item, SelectionService selectionService)
{
IEnumerable<DesignerItem> groupItems = selectionService.GetGroupMembers(item).Cast<DesignerItem>();
double groupBottom = Canvas.GetTop(item) + item.Height;
foreach (DesignerItem groupItem in groupItems)
{
double groupItemTop = Canvas.GetTop(groupItem);
double delta = (groupBottom - groupItemTop) * (scale - 1);
Canvas.SetTop(groupItem, groupItemTop - delta);
groupItem.Height = groupItem.ActualHeight * scale;
}
}