/// <summary>
/// Initializes the drag.
/// </summary>
public void InitializeDrag(IInputModeContext context)
{
var imc = context.Lookup <IModelItemCollector>();
if (imc != null)
{
imc.Add(node);
}
rotationCenter = node.Layout.GetCenter();
initialAngle = GetAngle();
var graph = context.Lookup <IGraph>();
if (graph != null)
{
compoundEdit = graph.BeginEdit("Change Rotation Angle", "Change Rotation Angle");
}
portHandles.Clear();
var portContext = new DelegatingContext(context);
foreach (var port in node.Ports)
{
var portHandle = new DummyPortLocationModelParameterHandle(port);
portHandle.InitializeDrag(portContext);
portHandles.Add(portHandle);
}
if (reshapeHandler != null)
{
reshapeHandler.InitializeReshape(context);
}
// Collect other visible nodes and their angles
if (SnapToSameAngleDelta > 0)
{
var canvas = context.CanvasControl;
var rotatedNodes =
canvas.GetCanvasObjects()
.Select(co => co.UserObject)
// only collect nodes
.OfType <INode>()
// ... that are in the viewport
.Where(n => canvas.Viewport.Intersects(n.Layout.ToRectD()))
// ... and can be rotated
.Where(n => n.Style is RotatableNodeStyleDecorator)
// ... and are not *this* node
.Where(n => n != node);
// Group nodes by identical angles
nodeAngles =
rotatedNodes.GroupBy(n => ((RotatableNodeStyleDecorator)n.Style).Angle)
.Select(nodes => Tuple.Create(nodes.Key, nodes.ToList().AsEnumerable())).ToList();
}
}
/// <summary>
/// Stores the initial layout of the node in case the user cancels the resizing.
/// </summary>
/// <param name="inputModeContext"></param>
public void InitializeDrag(IInputModeContext inputModeContext)
{
if (reshapeHandler != null)
{
// if there is a reshape handler: initialize to
// ensure proper handling of a parent group node
reshapeHandler.InitializeReshape(inputModeContext);
}
initialLayout.Reshape(GetNodeBasedOrientedRectangle());
dummyLocation = initialLayout.GetAnchorLocation();
dummySize = initialLayout.GetSize();
initialRect = node.Layout.ToRectD();
portHandles.Clear();
var portContext = new DelegatingContext(inputModeContext);
foreach (var port in node.Ports)
{
var portHandle = new DummyPortLocationModelParameterHandle(port);
portHandle.InitializeDrag(portContext);
portHandles.Add(portHandle);
}
}