private void CreateOrganic()
{
if (organic == null)
{
organic = new OrganicLayout();
organic.PrependStage(new PortCalculator());
}
}
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;
}
private void ConfigureGrouping()
{
IOptionItem groupingItem = Handler.GetItemByName("GROUPING.GROUP_LAYOUT_POLICY");
switch ((string)groupingItem.Value)
{
case IGNORE_GROUPS:
preStage = new HideGroupsStage();
organic.PrependStage(preStage);
break;
case LAYOUT_GROUPS:
//do nothing...
break;
case FIX_GROUP_BOUNDS:
IDataProvider groupDP = CurrentLayoutGraph.GetDataProvider(GroupingKeys.GroupDpKey);
if (groupDP != null)
{
groupNodeContentDP = Maps.CreateHashedNodeMap();
foreach (Node node in CurrentLayoutGraph.Nodes)
{
if (groupDP.GetBool(node))
{
groupNodeContentDP.Set(node, GroupNodeMode.FixBounds);
}
}
CurrentLayoutGraph.AddDataProvider(OrganicLayout.GroupNodeModeDpKey, groupNodeContentDP);
}
break;
case FIX_GROUP_CONTENTS:
groupDP = CurrentLayoutGraph.GetDataProvider(GroupingKeys.GroupDpKey);
if (groupDP != null)
{
groupNodeContentDP = Maps.CreateHashedNodeMap();
foreach (Node node in CurrentLayoutGraph.Nodes)
{
if (groupDP.GetBool(node))
{
groupNodeContentDP.Set(node, GroupNodeMode.FixContents);
}
}
CurrentLayoutGraph.AddDataProvider(OrganicLayout.GroupNodeModeDpKey, groupNodeContentDP);
}
break;
}
}
/// <summary>
/// Lays out the graph with nodes that are laid out incrementally.
/// </summary>
/// <param name="incrementalNodes">Nodes that should be inserted into the graph incrementally.</param>
private async Task ApplyLayout(HashSet <INode> incrementalNodes)
{
toolStrip.Enabled = false;
// We'll use an OrganicLayout with OrganicEdgeRouter to get a pleasing image for most databases
var layout = new OrganicLayout
{
NodeEdgeOverlapAvoided = true,
NodeOverlapsAllowed = false,
PreferredEdgeLength = 180,
MinimumNodeDistance = 80,
StarSubstructureStyle = StarSubstructureStyle.Radial,
StarSubstructureSize = 3,
ConsiderNodeSizes = true,
CycleSubstructureStyle = CycleSubstructureStyle.Circular,
StarSubstructureTypeSeparation = false,
LabelingEnabled = true,
ParallelEdgeRouterEnabled = true,
Scope = incrementalNodes.Count > 0 ? Scope.MainlySubset : Scope.All
};
layout.PrependStage(new OrganicEdgeRouter()
{
ConsiderExistingBends = false,
KeepExistingBends = false,
EdgeNodeOverlapAllowed = false,
RouteAllEdges = false,
MinimumDistance = 10
});
// GenericLabeling ensures that labels don't overlap
layout.PrependStage(new GenericLabeling {
RemoveNodeOverlaps = true
});
// CurveFittingLayoutStage adds Bezier control points so we can use BezierEdgeStyle to render the edges
layout.PrependStage(new CurveFittingLayoutStage());
var layoutData = new CompositeLayoutData(
new OrganicLayoutData
{
NodeTypes = { Delegate = node => ((INeo4jNode)node.Tag).Labels[0] },
AffectedNodes = { Source = incrementalNodes },
},
new LabelingData
{
EdgeLabelPreferredPlacement =
{
Constant = new PreferredPlacementDescriptor
{
AngleReference = LabelAngleReferences.RelativeToEdgeFlow,
PlaceAlongEdge = LabelPlacements.AtSource,
SideOfEdge = LabelPlacements.RightOfEdge | LabelPlacements.LeftOfEdge
}
}
}
);
await graphControl.MorphLayout(layout, TimeSpan.FromMilliseconds(700), layoutData);
toolStrip.Enabled = true;
}