private void ShowCanvasContextMenu(object state)
{
Thread.Sleep(300);
// put it on the UI thread to execute.
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
if (!_mouseMovedWhileRMBDown)
{
CanvasContextMenu contextMenu = new CanvasContextMenu(_typeManager, MessageSender, Navigator, _currentMousePosition);
ContextMenuService.SetContextMenu(this, contextMenu);
contextMenu.IsOpen = true;
contextMenu.HorizontalOffset = _currentMousePosition.X;
contextMenu.VerticalOffset = _currentMousePosition.Y + 30;
}
});
}
public async Task OnMouseUp(MouseEventArgs e)
{
MouseDown = false;
if (e.Button == 2)
{
RectSelection.Create = false;
if (!e.CtrlKey && RectSelection.Width <= 0 && RectSelection.Height <= 0)
{
if (ObjectClicked.Right)
{
ObjectClicked.Right = false;
ObjectContextMenu.Open(e.ClientX, e.ClientY);
}
else
{
if (GraphMode == GraphMode.Algorithm)
{
AlgorithmContextMenu.Open(e.ClientX, e.ClientY);
}
else
{
CanvasContextMenu.Open(e.ClientX, e.ClientY);
origin[0] = e.ClientX;
origin[1] = e.ClientY;
if (ActiveGraph.Nodes.Any() || ActiveGraph.Edges.Any())
{
await ActiveGraphChanged.InvokeAsync(new Graph());
}
}
}
}
else
{
bool aNodesChanged = false;
bool aEdgesChanged = false;
foreach (Node node in Graph.Nodes)
{
if (node.Xaxis <= RectSelection.X + RectSelection.Width &&
node.Xaxis >= RectSelection.X &&
node.Yaxis <= RectSelection.Y + RectSelection.Height &&
node.Yaxis >= RectSelection.Y)
{
if (!ActiveGraph.Nodes.Contains(node))
{
ActiveGraph.Nodes.Add(node);
aNodesChanged = true;
}
}
else if (ActiveGraph.Nodes.Remove(node))
{
aNodesChanged = true;
}
}
foreach (Edge edge in Graph.Edges)
{
ShowEdge showEdge = new ShowEdge(edge);
var x = 0.25 * edge.Head.Xaxis + 0.5 * showEdge.CurvePoint[0] + 0.25 * edge.Tail.Xaxis;
var y = 0.25 * edge.Head.Yaxis + 0.5 * showEdge.CurvePoint[1] + 0.25 * edge.Tail.Yaxis;
if (x <= RectSelection.X + RectSelection.Width &&
x >= RectSelection.X &&
y <= RectSelection.Y + RectSelection.Height &&
y >= RectSelection.Y)
{
if (!ActiveGraph.Edges.Contains(edge))
{
ActiveGraph.Edges.Add(edge);
aEdgesChanged = true;
}
}
else if (ActiveGraph.Edges.Remove(edge))
{
aEdgesChanged = true;
}
}
if (aNodesChanged || aEdgesChanged)
{
await ActiveGraphChanged.InvokeAsync(ActiveGraph);
}
}
RectSelection = new RectSelection();
return;
}
if (ObjectClicked.Left)
{
ObjectClicked.Left = false;
if (GraphMode == GraphMode.InsertNode)
{
SvgClass = "pointer";
}
else
{
SvgClass = "grab";
}
}
else if (!e.CtrlKey && !ActiveGraph.Nodes.Any() && !ActiveGraph.Nodes.Any() && GraphMode == GraphMode.InsertNode)
{
NodeService.AddNode(Graph.Nodes, Options.Default, e.ClientX * SVGControl.Scale + SVGControl.Xaxis, e.ClientY * SVGControl.Scale + SVGControl.Yaxis);
}
else if (ActiveGraph.Nodes.Any() || ActiveGraph.Edges.Any())
{
await ActiveGraphChanged.InvokeAsync(new Graph());
}
if (SVGControl.Pan)
{
SVGControl.Pan = false;
SvgClass = "grab";
SVGControl.OldXaxis = SVGControl.Xaxis;
SVGControl.OldYaxis = SVGControl.Yaxis;
}
}
