/// <summary>
/// Prepares the layout execution.
/// </summary>
public void InitializeLayout()
{
// prepare undo/redo
oldClearRect = clearRect.ToRectD();
layoutEdit = Graph.BeginEdit("Clear Area", "Clear Area");
resetToOriginalGraphStageData = CreateGivenCoordinateStageData();
executor = CreateDraggingLayoutExecutor();
}
/// <summary>
/// Initializes the layout calculation.
/// </summary>
public void InitializeLayout()
{
resetToOriginalGraphStageData = CreateGivenCoordinatesStageData(n => !nodes.Contains(n), e => !IsSubgraphEdge(e));
// hide edge path for any edge between a node in 'nodes' and a node not in 'nodes'
HideInterEdges();
executor = GetDragLayoutExecutor();
state = GestureState.Dragging;
}
/// <summary>
/// Called before the a layout run starts.
/// </summary>
private void OnLayoutStarting()
{
switch (state)
{
case GestureState.Initializing:
resetToOriginalGraphStageData = CreateGivenCoordinatesStageData(n => true, e => true);
executor = CreateInitializingLayoutExecutor();
// highlight the parent of the current subtree and make the connection to the root invisible
if (subtree.Parent != null)
{
canvasObjectEdge = graphControl.GraphModelManager.GetCanvasObject(subtree.ParentToRootEdge);
canvasObjectEdge.Visible = false;
subtree.NewParent = subtree.Parent;
UpdateComponents();
graphControl.HighlightIndicatorManager.AddHighlight(subtree.NewParent);
}
break;
case GestureState.Cancelling:
// make root edge visible
if (canvasObjectEdge != null)
{
canvasObjectEdge.Visible = true;
}
// remove highlight
if (subtree.NewParent != null)
{
graphControl.HighlightIndicatorManager.RemoveHighlight(subtree.NewParent);
}
// reset to original graph layout
executor = CreateCanceledLayoutExecutor();
break;
case GestureState.Finishing:
// before the last run starts, we have to reparent the subtree
if (ApplyNewParent())
{
canvasObjectEdge = graphControl.GraphModelManager.GetCanvasObject(subtree.ParentToRootEdge);
canvasObjectEdge.Visible = false;
}
// last layout run also includes subtree
executor = CreateFinishedLayoutExecutor();
// remove highlight
if (subtree.NewParent != null)
{
graphControl.HighlightIndicatorManager.RemoveHighlight(subtree.NewParent);
}
state = GestureState.Finished;
break;
}
}
/// <summary>
/// Creates a <see cref="GivenCoordinatesStageData"/> that store the layout of nodes and edges.
/// </summary>
/// <returns>The <see cref="GivenCoordinatesStageData"/>.</returns>
private GivenCoordinatesStageData CreateGivenCoordinateStageData()
{
var data = new GivenCoordinatesStageData();
foreach (var node in Graph.Nodes)
{
data.NodeLocations.Mapper[node] = node.Layout.GetTopLeft();
data.NodeSizes.Mapper[node] = node.Layout.GetSize();
}
foreach (var edge in Graph.Edges)
{
data.EdgePaths.Mapper[edge] = edge.GetPathPoints();
}
return(data);
}
/// <summary>
/// Creates a <see cref="GivenCoordinatesStageData"/> that stores the layout of nodes and edges.
/// </summary>
/// <param name="nodePredicate">Determines the nodes to store.</param>
/// <param name="edgePredicate">Determines the edges to store.</param>
/// <returns>The <see cref="GivenCoordinatesStageData"/>.</returns>
private GivenCoordinatesStageData CreateGivenCoordinatesStageData(Predicate <INode> nodePredicate, Predicate <IEdge> edgePredicate)
{
var data = new GivenCoordinatesStageData();
foreach (var node in Graph.Nodes.Where(n => nodePredicate(n)))
{
data.NodeLocations.Mapper[node] = node.Layout.GetTopLeft();
data.NodeSizes.Mapper[node] = node.Layout.GetSize();
}
foreach (var edge in Graph.Edges.Where(e => edgePredicate(e)))
{
data.EdgePaths.Mapper[edge] = edge.GetPathPoints();
}
return(data);
}
/// <summary>
/// Called after the a layout run finished.
/// </summary>
private void OnLayoutFinished()
{
switch (state)
{
case GestureState.Initializing:
resetToWorkingGraphStageData = CreateGivenCoordinatesStageData(n => !subtree.Nodes.Contains(n), e => !subtree.Edges.Contains(e));
executor = CreateDraggingLayoutExecutor();
state = GestureState.Dragging;
break;
case GestureState.Dragging:
// check for a new parent candidate
UpdateNewParent();
break;
case GestureState.Finished:
// make root edge visible
if (subtree.Parent == subtree.NewParent && canvasObjectEdge != null)
{
canvasObjectEdge.Visible = true;
}
break;
}
}
/// <summary>
/// Prepares the layout execution.
/// </summary>
public void InitializeLayout()
{
layoutEdit = Graph.BeginEdit("Clear Area", "Clear Area");
resetToOriginalGraphStageData = CreateGivenCoordinateStageData();
executor = CreateDraggingLayoutExecutor();
}
/// <summary>
/// Prepares the layout execution.
/// </summary>
public void InitializeLayout()
{
resetToOriginalGraphStageData = CreateGivenCoordinateStageData();
executor = CreateDraggingLayoutExecutor();
}
/// <summary>
/// Run a layout immediately.
/// </summary>
public void LayoutImmediately()
{
resetToOriginalGraphStageData = CreateGivenCoordinatesStageData(n => false, e => false);
state = GestureState.Finishing;
RunLayout();
}
