/// <summary>
/// This method updates the route polyline, especially by providing a new geometry.
/// The DragAndDrop handling is corrected.
/// </summary>
/// <param name="points">Points defining the new geometry for the polyline.</param>
/// <param name="toolTip">Tool tip of the hole polyline.</param>
/// <param name="style">Display style of the polyline.</param>
public void Update(IEnumerable <Point> points, string toolTip, ShapeStyle style)
{
if (route != null && !PointsExists())
{
// remove drag and drop behavior
InProcessDragDropBehavior.RemoveDragHandler(MapPolyline, Drag);
InProcessDragDropBehavior.SetEnableDragDrop(MapPolyline, true);
InProcessDragDropBehavior.RemoveDragHandler(AnimatedPolyline, Drag);
InProcessDragDropBehavior.SetEnableDragDrop(AnimatedPolyline, true);
}
Dispose();
Points = points;
ToolTip = toolTip;
Color = style == null ? Colors.Black : style.Color;
if (route == null || PointsExists())
{
return;
}
// add drag and drop behavior
InProcessDragDropBehavior.SetEnableDragDrop(MapPolyline, true);
InProcessDragDropBehavior.AddDragHandler(MapPolyline, Drag);
InProcessDragDropBehavior.SetEnableDragDrop(AnimatedPolyline, true);
InProcessDragDropBehavior.AddDragHandler(AnimatedPolyline, Drag);
}
/// <summary>
/// Disposes the way point.
/// </summary>
public virtual void Dispose()
{
WayPointMouseRightButtonDown -= WayPoint_MouseRightButtonDown;
InProcessDragDropBehavior.SetEnableDragDrop(this, false);
InProcessDragDropBehavior.RemoveDragHandler(this, Drag);
InProcessDragDropBehavior.RemoveDragMoveHandler(this, DragMove);
layer.Shapes.Remove(this);
}
/// <summary>
/// Attaches (= forces) a Drag&Drop operation to the specified element.
/// </summary>
/// <param name="e">Element to Drag&Drop</param>
/// <param name="dragPosition">Drag position</param>
/// <param name="position">Current position. Defaults to dragPosition, if null.</param>
/// <param name="fireInitialBegin">Forces a initial Drag event to be fired, if set to true.</param>
public static void Attach(FrameworkElement e, Point dragPosition, Point?position = null, bool fireInitialBegin = false)
{
if (Mouse.LeftButton != MouseButtonState.Pressed)
{
throw new InvalidOperationException();
}
var state = new InProcessDragDropBehavior {
Target = e
};
state.Attach(dragPosition, position, fireInitialBegin);
}
/// <summary>
/// Handles mouse left button down event
/// </summary>
/// <param name="sender">Event source</param>
/// <param name="e">Event arguments</param>
private static void PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var state = new InProcessDragDropBehavior {
Target = sender as FrameworkElement
};
if (state.Target != null && state.Target.Parent != null)
{
state.Target.SetValue(DragDropState, state);
state.PreviewMouseLeftButtonDown(e);
}
e.Handled = true;
}
/// <summary>
/// Creates the way point
/// </summary>
/// <param name="layer">Assigned route layer</param>
/// <param name="p">Position of the way point (world coordinates)</param>
/// <param name="style">Style of the way point</param>
protected WayPoint(RouteLayer layer, Point p, ShapeStyle style)
{
this.layer = layer;
Width = Height = style.Size;
// set initial position and show polyline
// do not use Point property to avoid LocationChanged event in initialization
ShapeCanvas.SetLocation(this, p);
// drag and drop handlers
InProcessDragDropBehavior.AddDragHandler(this, Drag);
InProcessDragDropBehavior.AddDragMoveHandler(this, DragMove);
InProcessDragDropBehavior.SetEnableDragDrop(this, true);
// handler for context menu
MouseRightButtonDown += WayPoint_MouseRightButtonDown;
}
/// <summary>
/// Initiates a Drag&Drop operation on this way point.
/// </summary>
/// <param name="dragPosition"></param>
/// <param name="position"></param>
public void BeginDrag(Point dragPosition, Point?position = null)
{
InProcessDragDropBehavior.Attach(this, dragPosition, position);
}
/// <summary>
/// Initiates a Drag&Drop operation on this way point.
/// </summary>
/// <param name="dragPosition"></param>
/// <param name="position"></param>
public void BeginDrag(System.Windows.Point dragPosition, System.Windows.Point?position = null)
{
InProcessDragDropBehavior.Attach(this, dragPosition, position);
}
