static public List <OperatorWidgetInputZone> ComputeInputZonesForOp(IConnectionLineTarget op)
{
var opWidget = op as OperatorWidget;
if (opWidget != null)
{
return(ComputeInputZonesForOperatorWidget(opWidget));
}
var outputWidget = op as OutputWidget;
if (outputWidget != null)
{
return(ComputeIntputZonesForOutputWidget(outputWidget));
}
throw new Exception("Can't compute input zones for unknown widget type");
}
/**
* This function is called by IConnectionTargets when
* the end of a connection is dragged over them.
*
* To "snap" valid connections, we save the zone so the
* GiveFeedbackHandler can use its position.
*/
public void HandleDragOverEvent(DragEventArgs e, IConnectionLineTarget targetWidget)
{
e.Effects = DragDropEffects.None;
e.Handled = true;
var connectionStartOutput = e.Data.GetData(CONNECTION_LINE_OUTPUT_IDENTIFIER) as OperatorPart;
if (connectionStartOutput == null)
{
return; // Skip non-connection drop data
}
// We can't use Mouse.GetPosition() also see
// http://msdn.microsoft.com/en-us/library/system.windows.input.mouse.getposition(v=vs.110).aspx
var mousePosition = e.GetPosition(targetWidget as UIElement);
var inputZonesForDrag = OperatorWidgetInputZoneManager.ComputeInputZonesForOp(targetWidget);
var zoneBelowMouse = OperatorWidgetInputZoneManager.FindZoneBelowMouse(inputZonesForDrag, mousePosition);
if (zoneBelowMouse != null)
{
zoneBelowMouse.IsBelowMouse = true;
_snappedToValidInput = zoneBelowMouse.Input.Type == connectionStartOutput.Type ||
zoneBelowMouse.Input.Type == FunctionType.Generic;
if (_snappedToValidInput)
{
e.Effects = DragDropEffects.Copy;
_snappedPointOnCanvas = targetWidget.PositionOnCanvas + new Vector(zoneBelowMouse.LeftPosition + 0.5 * zoneBelowMouse.Width, targetWidget.Height);
}
}
if (mousePosition == _lastDragOverPosition)
{
return;
}
_lastDragOverPosition = mousePosition;
targetWidget.UpdateInputZonesUIFromDescription(inputZonesForDrag);
}
public ConnectionLine(Guid id, Operator parentOp, IConnectionLineSource source, IConnectionLineTarget target, OperatorPart output, OperatorPart input)
{
//IsHitTestVisible = false;
ID = id;
ParentOp = parentOp;
Source = source;
Target = target;
Output = output;
Input = input;
CreateLineGeometry();
IsSelected = false;
if (!Output.Parent.Visible || !Input.Parent.Visible)
{
Opacity = 0;
IsHitTestVisible = false;
}
ToolTip = Output.ToString() + " -> " + Input.ToString() + "\n" + "(Drag with CTRL to disconnect)";
MouseLeftButtonDown += ConnectionLine_MouseLeftButtonDownHandler;
Loaded += ConnectionLine_Loaded;
Unloaded += OnUnloaded;
}
