/// <inheritdoc />
protected override ILayoutAlgorithm CreateConfiguredLayout(GraphControl graphControl)
{
MultiStageLayout layout;
switch (LayoutStyleItem)
{
default:
case EnumStyle.Default:
layout = ConfigureDefaultLayout();
break;
case EnumStyle.Classic:
layout = ConfigureClassicLayout();
break;
case EnumStyle.HorizontalVertical:
layout = new TreeLayout();
break;
case EnumStyle.Compact:
layout = ConfigureCompactLayout(graphControl);
break;
}
layout.ParallelEdgeRouterEnabled = false;
((ComponentLayout)layout.ComponentLayout).Style = ComponentArrangementStyles.MultiRows;
layout.SubgraphLayoutEnabled = ActOnSelectionOnlyItem;
layout.PrependStage(CreateTreeReductionStage());
var placeLabels = EdgeLabelingItem == EnumEdgeLabeling.Integrated || EdgeLabelingItem == EnumEdgeLabeling.Generic;
// required to prevent WrongGraphStructure exception which may be thrown by TreeLayout if there are edges
// between group nodes
layout.PrependStage(new HandleEdgesBetweenGroupsStage(placeLabels));
if (EdgeLabelingItem == EnumEdgeLabeling.Generic)
{
layout.LabelingEnabled = true;
layout.Labeling = new GenericLabeling {
PlaceEdgeLabels = true,
PlaceNodeLabels = false,
ReduceAmbiguity = ReduceAmbiguityItem
};
}
AddPreferredPlacementDescriptor(graphControl.Graph, LabelPlacementAlongEdgeItem, LabelPlacementSideOfEdgeItem, LabelPlacementOrientationItem, LabelPlacementDistanceItem);
return(layout);
}
/// <summary>
/// Creates and configures the <see cref="TreeLayout"/> and the <see cref="TreeLayoutData"/>
/// such that node types are considered.
/// </summary>
private Sample CreateTreeSample()
{
// create a tree layout including a reduction stage to support non-tree graphs too
var layout = new TreeLayout {
DefaultNodePlacer = new CompactNodePlacer()
};
var edgeRouter = new EdgeRouter {
Scope = Scope.RouteAffectedEdges
};
var reductionStage = new TreeReductionStage {
NonTreeEdgeRouter = edgeRouter, NonTreeEdgeSelectionKey = edgeRouter.AffectedEdgesDpKey
};
layout.PrependStage(reductionStage);
// the node types are specified as delegate on the nodeTypes property of the layout data
var layoutData = new TreeLayoutData {
NodeTypes = { Delegate = node => GetNodeType(node) }
};
return(new Sample {
Name = "Tree",
File = "tree",
Layout = layout,
LayoutData = layoutData,
IsDirected = true
});
}
private static ILayoutAlgorithm CreateTreeLayout()
{
var reductionStage = new TreeReductionStage
{
NonTreeEdgeRouter = new NonTreeEdgeRouterStage(),
NonTreeEdgeSelectionKey = LayoutKeys.AffectedEdgesDpKey
};
var treeLayout = new TreeLayout {
IntegratedEdgeLabeling = true
};
treeLayout.PrependStage(reductionStage);
DisableAutoFlipping(treeLayout);
return(treeLayout);
}
private void SetupLayouts()
{
// create TreeLayout
var treeLayout = new TreeLayout {
LayoutOrientation = LayoutOrientation.LeftToRight
};
treeLayout.PrependStage(new FixNodeLayoutStage());
layouts.Add(treeLayout);
layoutMapper["Tree"] = treeLayout;
layoutComboBox.Items.Add("Tree");
// create BalloonLayout
var balloonLayout = new BalloonLayout
{
FromSketchMode = true,
CompactnessFactor = 1.0,
AllowOverlaps = true
};
balloonLayout.PrependStage(new FixNodeLayoutStage());
layouts.Add(balloonLayout);
layoutMapper["Balloon"] = balloonLayout;
layoutComboBox.Items.Add("Balloon");
// create OrganicLayout
var organicLayout = new OrganicLayout {
MinimumNodeDistance = 40,
Deterministic = true
};
organicLayout.PrependStage(new FixNodeLayoutStage());
layouts.Add(organicLayout);
layoutMapper["Organic"] = organicLayout;
layoutComboBox.Items.Add("Organic");
// create OrthogonalLayout
var orthogonalLayout = new OrthogonalLayout();
orthogonalLayout.PrependStage(new FixNodeLayoutStage());
layouts.Add(orthogonalLayout);
layoutMapper["Orthogonal"] = orthogonalLayout;
layoutComboBox.Items.Add("Orthogonal");
// set it as initial value
currentLayout = treeLayout;
layoutComboBox.SelectedIndex = 0;
}