/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
protected void OnVertexSelected(object sender, VertexSelectedEventArgs args)
{
// Toggle and append selection occurs in area selection only. No need to worry about it here
var control = args.VertexControl;
var vertex = args.VertexControl.Vertex as VertexBase;
if (args.MouseArgs.LeftButton == MouseButtonState.Pressed)
{
// Is this a new selection and/or a toggle selection?
if (!selected_vertices_.Contains(vertex))
{
ClearSelection();
// User is only selecting one vertex
SelectVertex(control, false);
}
last_vertex_control_ = control;
//last_vertex_position_.X = last_vertex_control_.GetPosition().X;
//last_vertex_position_.Y = last_vertex_control_.GetPosition().Y;
var position = zoom_control_.TranslatePoint(args.MouseArgs.GetPosition(zoom_control_), graph_area_);
last_vertex_position_.X = position.X;
last_vertex_position_.Y = position.Y;
}
}
private void ZoomControlMouseMove(object sender, MouseEventArgs e)
{
if (edgeBlueprint == null)
{
return;
}
var position = zoomControl.TranslatePoint(e.GetPosition(zoomControl), graphArea);
position.Offset(2, 2);
edgeBlueprint.UpdateTargetPosition(position);
}
void _zoomControl_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
if (_edgeBp == null)
{
return;
}
var pos = _zoomControl.TranslatePoint(e.GetPosition(_zoomControl), _graphArea);
pos.Offset(2, 2);
_edgeBp.UpdateTargetPosition(pos);
}
private void OnGiveFeedback(object sender, GiveFeedbackEventArgs e)
{
if (LinkPreviewBehavior.LinkPreview == null)
{
return;
}
// TODO cached this maybe. not efficient here
GraphAreaBase graphArea = AssociatedObject.FindVisualParentOfType <GraphAreaBase>();
ZoomControl zoomControl = graphArea.FindVisualParentOfType <ZoomControl>();
Vector halfsize = new Vector((double)(e.OriginalSource as UIElement).GetValue(FrameworkElement.WidthProperty) / 2.0,
(double)(e.OriginalSource as UIElement).GetValue(FrameworkElement.HeightProperty) / 2.0);
LinkPreviewBehavior.LinkPreview.SetCurrentValue(UIElement.IsEnabledProperty, true);
LinkPreviewBehavior.LinkPreview.Start = (e.OriginalSource as UIElement).TranslatePoint(new Point(0, 0), graphArea) + halfsize;
LinkPreviewBehavior.LinkPreview.End = zoomControl.TranslatePoint(MouseHelper.GetMousePosition(zoomControl), graphArea);
}
