internal bool HitTestConnection(Point testPoint, out CPinViewModel hitPin, out Point hitCanvasCoords)
{
hitCanvasCoords = NodeCanvas.PointFromScreen(testPoint);
Point hitTestPoint = NodeGraphOuter.PointFromScreen(testPoint);
IInputElement hitElement = NodeGraphOuter.InputHitTest(hitTestPoint);
if (hitElement is FrameworkElement uiElement)
{
if (uiElement.DataContext is CPinViewModel hitPinVM)
{
hitPin = hitPinVM;
return(true);
}
}
hitPin = null;
return(false);
}
internal Point GetPasteReferenceLocation()
{
System.Drawing.Point mouse = System.Windows.Forms.Cursor.Position;
Point mousePoint = new Point(mouse.X, mouse.Y);
Point viewPoint = PointFromScreen(mousePoint);
Point viewMax = new Point(ActualWidth, ActualHeight);
Point canvasPoint = NodeCanvas.PointFromScreen(mousePoint);
if (viewPoint.X > 0 && viewPoint.Y > 0 && viewPoint.X < viewMax.X && viewPoint.Y < viewMax.Y)
{
return(canvasPoint);
}
// little hack here as nodes are pasted at their TopLeft Corner we offset the MaxBottomRight location so nodes are not pasted entirely offscreen
double viewX = Math.Max(Math.Min(viewMax.X - 100, viewPoint.X), 0);
double viewY = Math.Max(Math.Min(viewMax.Y - 100, viewPoint.Y), 0);
GeneralTransform toCanvas = NodeGraphOuter.TransformToDescendant(NodeCanvas);
return(toCanvas.Transform(new Point(viewX, viewY)));
}