internal ConnectorInfo GetInfo()
{
ConnectorInfo info = new ConnectorInfo();
info.DesignerItemLeft = DesignerCanvas.GetLeft(this.ParentDesignerItem);
info.DesignerItemTop = DesignerCanvas.GetTop(this.ParentDesignerItem);
info.DesignerItemSize = new Size(this.ParentDesignerItem.ActualWidth, this.ParentDesignerItem.ActualHeight);
info.Orientation = this.Orientation;
info.Position = this.Position;
return(info);
}
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
DesignerCanvas canvas = GetDesignerCanvas(this);
if (canvas != null)
{
// position relative to DesignerCanvas
this.dragStartPoint = new Point?(e.GetPosition(canvas));
e.Handled = true;
}
}
private void ShowAdorner()
{
// the ConnectionAdorner is created once for each Connection
if (this.connectionAdorner == null)
{
DesignerCanvas designer = VisualTreeHelper.GetParent(this) as DesignerCanvas;
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
this.connectionAdorner = new ConnectionAdorner(designer, this);
adornerLayer.Add(this.connectionAdorner);
}
}
this.connectionAdorner.Visibility = Visibility.Visible;
}
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;
var ctrl = (newItem.Content as Grid);
var tag = ctrl?.Tag;
newItem.Name = tag?.ToString();
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();
DropEvent?.Invoke(newItem, new EventArgs());
}
e.Handled = true;
}
}
void DragThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
DesignerItem designerItem = this.DataContext as DesignerItem;
DesignerCanvas designer = VisualTreeHelper.GetParent(designerItem) as DesignerCanvas;
if (designerItem != null && designer != null && designerItem.IsSelected)
{
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
// we only move DesignerItems
var designerItems = designer.SelectionService.CurrentSelection.OfType <DesignerItem>();
foreach (DesignerItem item in designerItems)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
minLeft = double.IsNaN(left) ? 0 : Math.Min(left, minLeft);
minTop = double.IsNaN(top) ? 0 : Math.Min(top, minTop);
}
double deltaHorizontal = Math.Max(-minLeft, e.HorizontalChange);
double deltaVertical = Math.Max(-minTop, e.VerticalChange);
foreach (DesignerItem item in designerItems)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
if (double.IsNaN(left))
{
left = 0;
}
if (double.IsNaN(top))
{
top = 0;
}
Canvas.SetLeft(item, left + deltaHorizontal);
Canvas.SetTop(item, top + deltaVertical);
}
designer.InvalidateMeasure();
e.Handled = true;
}
}
public ConnectionAdorner(DesignerCanvas designer, Connection connection)
: base(designer)
{
this.designerCanvas = designer;
adornerCanvas = new Canvas();
this.visualChildren = new VisualCollection(this);
this.visualChildren.Add(adornerCanvas);
this.connection = connection;
this.connection.PropertyChanged += new PropertyChangedEventHandler(AnchorPositionChanged);
InitializeDragThumbs();
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
base.Unloaded += new RoutedEventHandler(ConnectionAdorner_Unloaded);
}
void Connection_Unloaded(object sender, RoutedEventArgs e)
{
// do some housekeeping when Connection is unloaded
// remove event handler
this.Source = null;
this.Sink = null;
// remove adorner
if (this.connectionAdorner != null)
{
DesignerCanvas designer = VisualTreeHelper.GetParent(this) as DesignerCanvas;
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(this.connectionAdorner);
this.connectionAdorner = null;
}
}
}
public SelectionService(DesignerCanvas canvas)
{
this.designerCanvas = canvas;
}
void ResizeThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
DesignerItem designerItem = this.DataContext as DesignerItem;
DesignerCanvas designer = VisualTreeHelper.GetParent(designerItem) as DesignerCanvas;
if (designerItem != null && designer != null && designerItem.IsSelected)
{
double minLeft, minTop, minDeltaHorizontal, minDeltaVertical;
double dragDeltaVertical, dragDeltaHorizontal, scale;
IEnumerable <DesignerItem> selectedDesignerItems = designer.SelectionService.CurrentSelection.OfType <DesignerItem>();
CalculateDragLimits(selectedDesignerItems, out minLeft, out minTop,
out minDeltaHorizontal, out minDeltaVertical);
foreach (DesignerItem item in selectedDesignerItems)
{
if (item != null && item.ParentID == Guid.Empty)
{
switch (base.VerticalAlignment)
{
case VerticalAlignment.Bottom:
dragDeltaVertical = Math.Min(-e.VerticalChange, minDeltaVertical);
scale = (item.ActualHeight - dragDeltaVertical) / item.ActualHeight;
DragBottom(scale, item, designer.SelectionService);
break;
case VerticalAlignment.Top:
double top = Canvas.GetTop(item);
dragDeltaVertical = Math.Min(Math.Max(-minTop, e.VerticalChange), minDeltaVertical);
scale = (item.ActualHeight - dragDeltaVertical) / item.ActualHeight;
DragTop(scale, item, designer.SelectionService);
break;
default:
break;
}
switch (base.HorizontalAlignment)
{
case HorizontalAlignment.Left:
double left = Canvas.GetLeft(item);
dragDeltaHorizontal = Math.Min(Math.Max(-minLeft, e.HorizontalChange), minDeltaHorizontal);
scale = (item.ActualWidth - dragDeltaHorizontal) / item.ActualWidth;
DragLeft(scale, item, designer.SelectionService);
break;
case HorizontalAlignment.Right:
dragDeltaHorizontal = Math.Min(-e.HorizontalChange, minDeltaHorizontal);
scale = (item.ActualWidth - dragDeltaHorizontal) / item.ActualWidth;
DragRight(scale, item, designer.SelectionService);
break;
default:
break;
}
}
}
e.Handled = true;
}
}
