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);
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));
}
Canvas.SetZIndex(newItem, this.Children.Count);
this.Children.Add(newItem);
SetConnectorDecoratorTemplate(newItem);
//update selection
this.SelectionService.SelectItem(newItem);
newItem.Focus();
}
e.Handled = true;
}
}
private void SetConnectorDecoratorTemplate(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;
}
}
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;
}
}
private static DesignerItem DeserializeDesignerItem(XElement itemXML, Guid id, double OffsetX, double OffsetY)
{
DesignerItem item = new DesignerItem(id);
item.Width = Double.Parse(itemXML.Element("Width").Value, CultureInfo.InvariantCulture);
item.Height = Double.Parse(itemXML.Element("Height").Value, CultureInfo.InvariantCulture);
item.ParentID = new Guid(itemXML.Element("ParentID").Value);
item.IsGroup = Boolean.Parse(itemXML.Element("IsGroup").Value);
Canvas.SetLeft(item, Double.Parse(itemXML.Element("Left").Value, CultureInfo.InvariantCulture) + OffsetX);
Canvas.SetTop(item, Double.Parse(itemXML.Element("Top").Value, CultureInfo.InvariantCulture) + OffsetY);
Canvas.SetZIndex(item, Int32.Parse(itemXML.Element("zIndex").Value));
Object content = XamlReader.Load(XmlReader.Create(new StringReader(itemXML.Element("Content").Value)));
item.Content = content;
return item;
}
private void Group_Executed(object sender, ExecutedRoutedEventArgs e)
{
var items = from item in this.SelectionService.CurrentSelection.OfType<DesignerItem>()
where item.ParentID == Guid.Empty
select item;
Rect rect = GetBoundingRectangle(items);
DesignerItem groupItem = new DesignerItem();
groupItem.IsGroup = true;
groupItem.Width = rect.Width;
groupItem.Height = rect.Height;
Canvas.SetLeft(groupItem, rect.Left);
Canvas.SetTop(groupItem, rect.Top);
Canvas groupCanvas = new Canvas();
groupItem.Content = groupCanvas;
Canvas.SetZIndex(groupItem, this.Children.Count);
this.Children.Add(groupItem);
foreach (DesignerItem item in items)
item.ParentID = groupItem.ID;
this.SelectionService.SelectItem(groupItem);
}