WPF Subgraph Label

[Brains]

Implementation for #128, #276

Just enabled TextBlock creation for Subgraph. Only at Top position for now (better than nothing).
Then fixed some overlapping issues

[ghost]

All CLA requirements met.

[Brains]

Currently, WpfApplicationSample looks so right after the launch

No margins around subgraph labels, but dragging elements or collapse/expand fixes that instantly

[Brains]

The last commit fixes no margins issues

The only problem is the edge from 58 to Inner subgraph. But noticed it is buggy in other cases as well, like dragging Inner subgraph. Anyway, dragging 58 node corrects this.

[Brains]

Collapsed Outer Subgraph

But when collapsing Inner it crashes. However, same crash happens on master, guess not related to this PR.

AutomaticGraphLayout.dll!Microsoft.Msagl.Routing.ShapeCreator.GetShapesOnDict(System.Collections.Generic.Dictionary<Microsoft.Msagl.Core.Layout.Node, Microsoft.Msagl.Routing.Shape> nodesToShapes, Microsoft.Msagl.Core.Layout.Cluster c) Line 51	C#
AutomaticGraphLayout.dll!Microsoft.Msagl.Routing.ShapeCreator.GetShapes(Microsoft.Msagl.Core.Layout.GeometryGraph graph) Line 31	C#
AutomaticGraphLayout.dll!Microsoft.Msagl.Routing.SplineRouter.SplineRouter(Microsoft.Msagl.Core.Layout.GeometryGraph graph, System.Collections.Generic.IEnumerable<Microsoft.Msagl.Core.Layout.Edge> edges, double tightPadding, double loosePadding, double coneAngle, Microsoft.Msagl.Core.Routing.BundlingSettings bundlingSettings) Line 128	C#
AutomaticGraphLayout.dll!Microsoft.Msagl.Miscellaneous.LayoutHelpers.RouteAndLabelEdges(Microsoft.Msagl.Core.Layout.GeometryGraph geometryGraph, Microsoft.Msagl.Core.Layout.LayoutAlgorithmSettings layoutSettings, System.Collections.Generic.IEnumerable<Microsoft.Msagl.Core.Layout.Edge> edgesToRoute, int straighLineRoutingThreshold, Microsoft.Msagl.Core.CancelToken cancelToken) Line 205	C#
AutomaticGraphLayout.dll!Microsoft.Msagl.Layout.Initial.Relayout.RunInternal() Line 89	C#
AutomaticGraphLayout.dll!Microsoft.Msagl.Core.AlgorithmBase.Run() Line 17	C#
AutomaticGraphLayout.Drawing.dll!Microsoft.Msagl.Drawing.LayoutEditor.CollapseCluster(Microsoft.Msagl.Core.Layout.Cluster cluster) Line 372	C#
AutomaticGraphLayout.Drawing.dll!Microsoft.Msagl.Drawing.LayoutEditor.RelayoutOnIsCollapsedChanged(Microsoft.Msagl.Drawing.IViewerNode iCluster) Line 306	C#
Microsoft.Msagl.WpfGraphControl.dll!Microsoft.Msagl.WpfGraphControl.VNode.InvokeIsCollapsedChanged() Line 172	C#
Microsoft.Msagl.WpfGraphControl.dll!Microsoft.Msagl.WpfGraphControl.VNode.TopMarginRectMouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e) Line 184	C#

[Brains]

Now label position depends on LgNodeInfo.LabelPlacement.

• Same problem with the edge from 58
• Problem with top margin as well
• Collapse button overlapped if Subgraph is collapsed

[levnach]

@Brains, thank to working on it.
The crash in GetShapesOnDict can be fixed as follows:
foreach (var cc in c.Clusters) { if (cc.IsCollapsed) continue; GetShapesOnDict(nodesToShapes, cc); cShape.AddChild(nodesToShapes[cc]); }
But then the problems, further crashes, persist in master. I will try to work on it later. I think the pull request needs to be merged after the crashes are fixed and the edge routing works correctly.

[Brains]

the edge routing works correctly.

Fixed

[Brains]

I think the pull request needs to be merged after the crashes are fixed and the edge routing works correctly.

Fixed edge routing
Fixed overlap of CollapseButton in collapsed state and few minor things
Seems like all issues related to this PR were resolved

But the crash really has no connection to my PR, it was there before on master. I tried to figure out why it happened but stuck completely, too complex, really no idea. Consider the PR and the crash separately please, they are not related to each other.

[levnach]

Thanks for the change! I will try to fix the routing bugs.

[Brains]

Thank you for doing this cool project