private void HACK_Control_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
DropLinkEventArgs args = null;
if (PotentialLinkSource != null)
{
object target = PotentialLinkTarget != null ? PotentialLinkTarget.Vertex : null;
object edge = LinkBeingMoved != null ? LinkBeingMoved.Edge : null;
args = new DropLinkEventArgs(PotentialLinkSource.Vertex, target, edge);
LinkBeingMoved = null;
}
if (args != null && DropCommand.CanExecute(args))
{
/// checking if Target is different HACK_NODE is related to hard to reproduce error
/// somehow when you drag a link quickly to the existing node, but you don't really reach it or you are too far from node, then the target appears to be HACK_NODE
if (args.Target == null || (args.Target != null && args.Target.ToString().Equals("HACK_Node") == false))
{
DropCommand.Execute(args);
}
}
CancelAllDragging();
}
protected override void OnMouseRightButtonDown(MouseButtonEventArgs e)
{
base.OnMouseRightButtonDown(e);
if (e.Handled != true)
{
var hitElement = InputHitTest(e.GetPosition(this)) as DependencyObject;
if (hitElement != null)
{
e.Handled = true;
GraphSharp.Controls.VertexControl hitVertex = hitElement.GetParent <GraphSharp.Controls.VertexControl>(this);
if (hitVertex != null)
{
// 1) if vertex is not already selected, then clear selection and select this vertex.
if ((bool)hitVertex.GetValue(GraphView.IsSelectedProperty) == false)
{
UnselectAll();
SetIsSelected(hitVertex, true);
}
}
else
{
GraphSharp.Controls.EdgeControl hitEdge = hitElement.GetParent <GraphSharp.Controls.EdgeControl>(this);
if (hitEdge != null)
{
CreateRoutePointOnEdge(e, hitEdge);
}
}
}
// Take focus
Focus();
}
}
protected void graphLayout_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (IsExperimentRunning == false)
{
//check if current GraphLayout at the specified coordinates is occluded by another graph view
//Checking on GraphLayout not this GraphView, because hit elemenent must be checked relative to the current GraphLayout origin, not constant graph view element
Point clickPoint = e.GetPosition(GraphLayout);
bool isGraphLayoutOccluded = IsUIElementOccludedByAnotherGraphView(GraphLayout, clickPoint);
if (!isGraphLayoutOccluded)
{
IInputElement ele = GraphLayout.InputHitTest(clickPoint);
if (ele != null && HACK_VertexControl.Visibility != System.Windows.Visibility.Visible)
{
// if they clicked on a edge start redirecting the edge
DependencyObject obj = (DependencyObject)ele;
TraceLab.UI.WPF.Controls.RoutePointThumb routePointThumb = obj.GetParent <TraceLab.UI.WPF.Controls.RoutePointThumb>(this);
if (routePointThumb == null)
{
GraphSharp.Controls.EdgeControl edge = obj.GetParent <GraphSharp.Controls.EdgeControl>(this);
if (CanRedirectLink(edge))
{
StartRedirectLinkDrag(e, clickPoint, edge);
}
}
}
}
}
}
/// <summary>
/// Creates the route point on edge.
/// </summary>
/// <param name="e">The <see cref="System.Windows.Input.MouseButtonEventArgs"/> instance containing the event data.</param>
/// <param name="hitEdge">The hit edge.</param>
private void CreateRoutePointOnEdge(MouseButtonEventArgs e, GraphSharp.Controls.EdgeControl hitEdge)
{
ExperimentNodeConnection connection = (ExperimentNodeConnection)hitEdge.Edge;
Point canvasPoint = e.GetPosition(GraphLayout);
RoutePoint finalPoint = new RoutePoint(canvasPoint.X, canvasPoint.Y);
connection.RoutePoints.Add(finalPoint);
}
/// <summary>
/// Determines whether the edge can be redirected
/// </summary>
/// <param name="edge">The edge.</param>
/// <returns>
/// <c>true</c> if this instance [can redirect link] the specified current edge; otherwise, <c>false</c>.
/// </returns>
private bool CanRedirectLink(GraphSharp.Controls.EdgeControl edge)
{
bool canRedirect = false;
if (edge != null)
{
ExperimentNodeConnection connection = edge.Edge as ExperimentNodeConnection;
if (connection != null && connection.IsFixed == false)
{
canRedirect = true;
}
}
return(canRedirect);
}
private void StartRedirectLinkDrag(MouseButtonEventArgs e, Point clickPoint, GraphSharp.Controls.EdgeControl currentEdge)
{
// Cache information about currentEdge
LinkBeingMoved = currentEdge;
GraphSharp.Controls.VertexControl source = currentEdge.Source;
// Reveal the manipulation controls.
RevealHACKControls(clickPoint, source);
// handle mouse event so any other control
e.Handled = true;
// When we lose mouse capture, then cancel all dragging.
BeginDrag(e.MouseDevice, e.Timestamp, e.ChangedButton);
}
private void CancelAllDragging()
{
HACK_VertexControl.Visibility = Visibility.Hidden;
HACK_EdgeControl.SetValue(GraphSharp.Controls.EdgeControl.SourceProperty, null);
HACK_EdgeControl.SetValue(GraphSharp.Controls.EdgeControl.TargetProperty, null);
HACK_EdgeControl.Visibility = Visibility.Collapsed;
HACK_VertexControl.PreviewMouseLeftButtonUp -= HACK_Control_PreviewMouseLeftButtonUp;
HACK_VertexControl.PreviewMouseMove -= HACK_Control_PreviewMouseMove;
PotentialLinkTarget = null;
PotentialLinkSource = null;
if (LinkBeingMoved != null)
{
// Move was cancelled, re-validate the link.
SetIsLinkValid(LinkBeingMoved, true);
LinkBeingMoved = null;
}
}
private void StartRedirectLinkDrag(MouseButtonEventArgs e, Point clickPoint, GraphSharp.Controls.EdgeControl currentEdge)
{
// Cache information about currentEdge
LinkBeingMoved = currentEdge;
GraphSharp.Controls.VertexControl source = currentEdge.Source;
// Reveal the manipulation controls.
RevealHACKControls(clickPoint, source);
// handle mouse event so any other control
e.Handled = true;
// When we lose mouse capture, then cancel all dragging.
BeginDrag(e.MouseDevice, e.Timestamp, e.ChangedButton);
}
private void CancelAllDragging()
{
HACK_VertexControl.Visibility = Visibility.Hidden;
HACK_EdgeControl.SetValue(GraphSharp.Controls.EdgeControl.SourceProperty, null);
HACK_EdgeControl.SetValue(GraphSharp.Controls.EdgeControl.TargetProperty, null);
HACK_EdgeControl.Visibility = Visibility.Collapsed;
HACK_VertexControl.PreviewMouseLeftButtonUp -= HACK_Control_PreviewMouseLeftButtonUp;
HACK_VertexControl.PreviewMouseMove -= HACK_Control_PreviewMouseMove;
PotentialLinkTarget = null;
PotentialLinkSource = null;
if (LinkBeingMoved != null)
{
// Move was cancelled, re-validate the link.
SetIsLinkValid(LinkBeingMoved, true);
LinkBeingMoved = null;
}
}
private void HACK_Control_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
DropLinkEventArgs args = null;
if (PotentialLinkSource != null)
{
object target = PotentialLinkTarget != null ? PotentialLinkTarget.Vertex : null;
object edge = LinkBeingMoved != null ? LinkBeingMoved.Edge : null;
args = new DropLinkEventArgs(PotentialLinkSource.Vertex, target, edge);
LinkBeingMoved = null;
}
if (args != null && DropCommand.CanExecute(args))
{
/// checking if Target is different HACK_NODE is related to hard to reproduce error
/// somehow when you drag a link quickly to the existing node, but you don't really reach it or you are too far from node, then the target appears to be HACK_NODE
if (args.Target == null || (args.Target != null && args.Target.ToString().Equals("HACK_Node") == false))
{
DropCommand.Execute(args);
}
}
CancelAllDragging();
}
