/// <summary>
/// Called when dragging starts, stores old positions of the dragged element
/// </summary>
protected virtual void DragStarted()
{
startPositions = new Dictionary <DragThumb, rPoint>();
if (!(this is ISelectable) ||
!XCaseCanvas.SelectedItems.Contains(this as ISelectable))
{
startPositions.Add(this, new rPoint(this.Left, this.Top));
}
else
{
foreach (ISelectable item in XCaseCanvas.SelectedItems)
{
if (item.CanBeDraggedInGroup || DraggingAllone(item))
{
DragThumb thumb = item as DragThumb;
if (thumb != null)
{
startPositions.Add(thumb, new rPoint(thumb.Position)
{
tag = thumb.Placement
});
}
else
{
throw new InvalidOperationException(
string.Format("Dragging is implemented only for DragThumb and descendants. Object {0} of type {1} does not derive from DrugThumb. ", item, item.GetType()));
}
}
}
}
if (this is IAlignable)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(XCaseCanvas);
visualAidsAdorner = new VisualAidsAdorner(XCaseCanvas, this);
adornerLayer.Add(visualAidsAdorner);
}
}
/// <summary>
/// Drags the completed.
/// </summary>
/// <param name="finalPoint">The final point.</param>
/// <param name="totalShift">The total shift.</param>
protected virtual void DragCompleted(Point finalPoint, Vector totalShift)
{
if (visualAidsAdorner != null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(XCaseCanvas);
adornerLayer.Remove(visualAidsAdorner);
visualAidsAdorner = null;
}
if (DragStartPoint != finalPoint)
{
DiagramController controller = XCaseCanvas.Controller;
MacroCommand <DiagramController> moveMacroCommand =
MacroCommandFactory <DiagramController> .Factory().Create(controller);
moveMacroCommand.Description = CommandDescription.MOVE_MACRO;
JunctionPointCommand.PointMoveDataDictionary pointMoveDataCollection = null;
foreach (KeyValuePair <DragThumb, rPoint> pair in startPositions)
{
if (pair.Key is IAlignable)
{
IAlignable element = (IAlignable)pair.Key;
DragThumb dragThumb = element as DragThumb;
double _x;
double _y;
if (dragThumb != null && dragThumb.Placement == EPlacementKind.RelativeCanvas)
{
_x = dragThumb.Left - dragThumb.ReferentialElement.CanvasPosition.X;
_y = dragThumb.Top - dragThumb.ReferentialElement.CanvasPosition.Y;
}
else
{
_x = element.Left;
_y = element.Top;
}
CommandBase command = ViewController.CreateMoveCommand(
_x,
_y,
element.ViewHelper,
controller);
moveMacroCommand.Commands.Add(command);
}
else if (pair.Key is JunctionPoint)
{
JunctionPoint junctionPoint = (JunctionPoint)pair.Key;
JunctionPointCommand.PointMoveData data = new JunctionPointCommand.PointMoveData
{
Index = junctionPoint.OrderInJunction,
OldPosition = pair.Value,
NewPosition = new rPoint(junctionPoint.Position)
{
tag = junctionPoint.Placement
},
};
if (pointMoveDataCollection == null)
{
pointMoveDataCollection = new JunctionPointCommand.PointMoveDataDictionary();
}
if (!pointMoveDataCollection.ContainsKey(junctionPoint.Junction.viewHelperPointsCollection))
{
pointMoveDataCollection[junctionPoint.Junction.viewHelperPointsCollection] = new List <JunctionPointCommand.PointMoveData>();
}
pointMoveDataCollection[junctionPoint.Junction.viewHelperPointsCollection].Add(data);
}
}
// add one command for each affected junction
if (pointMoveDataCollection != null)
{
JunctionPointCommand junctionPointCommand = (JunctionPointCommand)JunctionPointCommandFactory.Factory().Create(controller);
junctionPointCommand.Action = JunctionPointCommand.EJunctionPointAction.MovePoints;
junctionPointCommand.PointMoveDataCollection = pointMoveDataCollection;
junctionPointCommand.Description = CommandDescription.MOVE_JUNCTION_POINTS;
moveMacroCommand.Commands.Add(junctionPointCommand);
}
moveMacroCommand.Execute();
if (Dropped != null)
{
Dropped();
}
}
}