TestTryGetGroupLayoutDrawingInfo()
{
// Graph has group drawing information.
const Double GroupRectanglePenWidth = 4.567;
const IntergroupEdgeStyle IntergroupEdgeStyle =
IntergroupEdgeStyle.Show;
IGraph oGraph = new Graph();
oGraph.SetValue(ReservedMetadataKeys.GroupLayoutDrawingInfo,
new GroupLayoutDrawingInfo(
new GroupInfo[] { new GroupInfo(), new GroupInfo() },
GroupRectanglePenWidth, null
));
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsTrue(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
Assert.AreEqual(2, oGroupLayoutDrawingInfo.GroupsToDraw.Count);
Assert.AreEqual(GroupRectanglePenWidth,
oGroupLayoutDrawingInfo.PenWidth);
Assert.IsNull(oGroupLayoutDrawingInfo.CombinedIntergroupEdges);
}
TryDrawGroupRectangles
(
IGraph graph,
GraphDrawingContext graphDrawingContext,
out Visual visual
)
{
Debug.Assert(graph != null);
Debug.Assert(graphDrawingContext != null);
AssertValid();
visual = null;
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
if (
!GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
graph, out oGroupLayoutDrawingInfo)
||
oGroupLayoutDrawingInfo.PenWidth == 0
)
{
return(false);
}
DrawingVisual oGroupRectangleDrawingVisual = new DrawingVisual();
using (DrawingContext oDrawingContext =
oGroupRectangleDrawingVisual.RenderOpen())
{
// Note: Don't try to use an alpha value of anything except 255
// for the rectangle colors. The rectangles overlap, and
// transparent overlapping rectangles would have uneven opacities.
Color oColor = GetContrastingColor(graphDrawingContext, 255,
false);
// Note that 1.0 is used where the GraphScale would normally be
// used. Group rectangles don't get scaled.
Pen oPen = CreateFrozenPen(CreateFrozenSolidColorBrush(oColor),
oGroupLayoutDrawingInfo.PenWidth * 1.0, DashStyles.Solid);
foreach (GroupInfo oGroupInfo in
oGroupLayoutDrawingInfo.GroupsToDraw)
{
Rect oGroupRectangle;
if (TryGetGroupRectangle(oGroupInfo, out oGroupRectangle))
{
WpfGraphicsUtil.DrawPixelAlignedRectangle(oDrawingContext,
null, oPen, oGroupRectangle);
}
}
}
visual = oGroupRectangleDrawingVisual;
return(true);
}
TestTryGetGroupLayoutDrawingInfo2()
{
// Graph does not have group drawing information.
IGraph oGraph = new Graph();
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsFalse(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
}
TestTryTransformGroupRectangles2()
{
// Graph does not have group drawing information.
IGraph oGraph = new Graph();
GroupMetadataManager.TransformGroupRectangles(oGraph,
new LayoutContext(Rectangle.FromLTRB(0, 0, 10, 20)),
new LayoutContext(Rectangle.FromLTRB(0, 0, 20, 10))
);
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsFalse(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
}
TryDrawCombinedIntergroupEdges
(
IGraph graph,
GraphDrawingContext graphDrawingContext,
out Visual visual
)
{
Debug.Assert(graph != null);
Debug.Assert(graphDrawingContext != null);
AssertValid();
visual = null;
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
if (!GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
graph, out oGroupLayoutDrawingInfo))
{
return(false);
}
IEnumerable <IntergroupEdgeInfo> oCombinedIntergroupEdges =
oGroupLayoutDrawingInfo.CombinedIntergroupEdges;
if (oCombinedIntergroupEdges == null)
{
return(false);
}
DrawingVisual oCombinedIntergroupEdgeDrawingVisual =
new DrawingVisual();
using (DrawingContext oDrawingContext =
oCombinedIntergroupEdgeDrawingVisual.RenderOpen())
{
foreach (IntergroupEdgeInfo oCombinedIntergroupEdge in
oCombinedIntergroupEdges)
{
DrawCombinedIntergroupEdge(oDrawingContext,
graphDrawingContext, oCombinedIntergroupEdge,
oGroupLayoutDrawingInfo);
}
}
visual = oCombinedIntergroupEdgeDrawingVisual;
return(true);
}
VerifyOriginalMetadata
(
IGraph oGraph,
IEdge oEdge1,
IEdge oEdge2,
IEdge oEdge3,
IEdge oEdge4
)
{
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsFalse(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
Assert.IsFalse(oGraph.ContainsKey(
ReservedMetadataKeys.IntergroupEdgesHidden));
VerifyOriginalEdgeMetadata(oEdge1, oEdge2, oEdge3, oEdge4);
}
TryDrawGroupLabels
(
IGraph graph,
GraphDrawingContext graphDrawingContext,
out Visual visual
)
{
Debug.Assert(graph != null);
Debug.Assert(graphDrawingContext != null);
AssertValid();
visual = null;
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
if (
m_eLabelPosition == VertexLabelPosition.Nowhere
||
!GroupMetadataManager.TryGetGroupLayoutDrawingInfo(graph,
out oGroupLayoutDrawingInfo)
)
{
return(false);
}
DrawingVisual oGroupLabelDrawingVisual = new DrawingVisual();
using (DrawingContext oDrawingContext =
oGroupLabelDrawingVisual.RenderOpen())
{
foreach (GroupInfo oGroupInfo in
oGroupLayoutDrawingInfo.GroupsToDraw)
{
DrawGroupLabel(oDrawingContext, graphDrawingContext,
oGroupInfo);
}
}
visual = oGroupLabelDrawingVisual;
return(true);
}
TestTryTransformGroupRectangles()
{
// Graph has group drawing information.
const Double GroupRectanglePenWidth = 4.567;
IGraph oGraph = new Graph();
GroupInfo oGroupInfo1 = new GroupInfo();
oGroupInfo1.Rectangle = Rectangle.FromLTRB(0, 0, 1, 2);
GroupInfo oGroupInfo2 = new GroupInfo();
oGroupInfo2.Rectangle = Rectangle.FromLTRB(0, 0, 3, 4);
oGraph.SetValue(ReservedMetadataKeys.GroupLayoutDrawingInfo,
new GroupLayoutDrawingInfo(
new GroupInfo[] { oGroupInfo1, oGroupInfo2 },
GroupRectanglePenWidth, null
));
GroupMetadataManager.TransformGroupRectangles(oGraph,
new LayoutContext(Rectangle.FromLTRB(0, 0, 10, 20)),
new LayoutContext(Rectangle.FromLTRB(0, 0, 20, 60))
);
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsTrue(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
Assert.AreEqual(2, oGroupLayoutDrawingInfo.GroupsToDraw.Count);
Assert.AreEqual(Rectangle.FromLTRB(0, 0, 2, 6),
oGroupLayoutDrawingInfo.GroupsToDraw[0].Rectangle);
Assert.AreEqual(Rectangle.FromLTRB(0, 0, 6, 12),
oGroupLayoutDrawingInfo.GroupsToDraw[1].Rectangle);
}
TestOnLayoutBegin()
{
// Draw rectangles, hide intergroup edges.
const Double GroupRectanglePenWidth = 1.23;
const IntergroupEdgeStyle IntergroupEdgeStyle =
IntergroupEdgeStyle.Hide;
IGraph oGraph = new Graph(GraphDirectedness.Undirected);
IVertex[] aoVertices = TestGraphUtil.AddVertices(oGraph, 4);
IEdgeCollection oEdges = oGraph.Edges;
IEdge oEdge1 = oEdges.Add(aoVertices[0], aoVertices[1], false);
IEdge oEdge2 = oEdges.Add(aoVertices[0], aoVertices[2], false);
IEdge oEdge3 = oEdges.Add(aoVertices[2], aoVertices[3], false);
IEdge oEdge4 = oEdges.Add(aoVertices[1], aoVertices[3], false);
// oEdge2 is intergroup. Give it an initial visibility.
oEdge2.SetValue(ReservedMetadataKeys.Visibility,
VisibilityKeyValue.Filtered);
// (oEdge4 is intergroup. Don't give it an initial visibility.)
GroupInfo oGroup1 = new GroupInfo();
oGroup1.Vertices.AddLast(aoVertices[0]);
oGroup1.Vertices.AddLast(aoVertices[1]);
oGroup1.Rectangle = Rectangle.FromLTRB(1, 2, 3, 4);
GroupInfo oGroup2 = new GroupInfo();
oGroup2.Vertices.AddLast(aoVertices[2]);
oGroup2.Vertices.AddLast(aoVertices[3]);
oGroup2.Rectangle = Rectangle.FromLTRB(5, 6, 7, 8);
GroupMetadataManager.OnLayoutBegin(oGraph);
GroupMetadataManager.OnLayoutUsingGroupsEnd(oGraph,
new GroupInfo[] { oGroup1, oGroup2 },
GroupRectanglePenWidth, IntergroupEdgeStyle);
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsTrue(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
Assert.AreEqual(GroupRectanglePenWidth,
oGroupLayoutDrawingInfo.PenWidth);
IList <GroupInfo> oGroupInfo = oGroupLayoutDrawingInfo.GroupsToDraw;
Assert.AreEqual(2, oGroupInfo.Count);
Assert.AreEqual(oGroup1, oGroupInfo[0]);
Assert.AreEqual(oGroup2, oGroupInfo[1]);
Assert.IsTrue(oGraph.ContainsKey(
ReservedMetadataKeys.IntergroupEdgesHidden));
Assert.IsFalse(oEdge1.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge2.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.AreEqual(VisibilityKeyValue.Filtered,
oEdge2.GetValue(ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge2.ContainsKey(
ReservedMetadataKeys.Visibility));
Assert.AreEqual(VisibilityKeyValue.Hidden,
oEdge2.GetValue(ReservedMetadataKeys.Visibility));
Assert.IsFalse(oEdge3.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge4.ContainsKey(
ReservedMetadataKeys.Visibility));
Assert.AreEqual(VisibilityKeyValue.Hidden,
oEdge4.GetValue(ReservedMetadataKeys.Visibility));
// Verify that OnLayoutBegin() reverses the metadata changes.
GroupMetadataManager.OnLayoutBegin(oGraph);
VerifyOriginalMetadata(oGraph, oEdge1, oEdge2, oEdge3, oEdge4);
}
TestOnLayoutBegin6()
{
// Request that intergroup edges be combined, and there are some.
const Double GroupRectanglePenWidth = 4.567;
const IntergroupEdgeStyle IntergroupEdgeStyle =
IntergroupEdgeStyle.Combine;
IGraph oGraph = new Graph(GraphDirectedness.Undirected);
IVertex[] aoVertices = TestGraphUtil.AddVertices(oGraph, 5);
IEdgeCollection oEdges = oGraph.Edges;
// Not intergroup.
IEdge oEdge1 = oEdges.Add(aoVertices[0], aoVertices[1], false);
IEdge oEdge2 = oEdges.Add(aoVertices[2], aoVertices[3], false);
// Intergroup, between groups 1 and 2.
IEdge oEdge3 = oEdges.Add(aoVertices[0], aoVertices[2], false);
IEdge oEdge4 = oEdges.Add(aoVertices[1], aoVertices[2], false);
IEdge oEdge5 = oEdges.Add(aoVertices[1], aoVertices[3], false);
// Intergroup, between groups 2 and 3.
IEdge oEdge6 = oEdges.Add(aoVertices[2], aoVertices[4], false);
IEdge oEdge7 = oEdges.Add(aoVertices[3], aoVertices[4], false);
// Intergroup, between groups 1 and 3.
IEdge oEdge8 = oEdges.Add(aoVertices[1], aoVertices[4], false);
GroupInfo oGroup1 = new GroupInfo();
oGroup1.Vertices.AddLast(aoVertices[0]);
oGroup1.Vertices.AddLast(aoVertices[1]);
oGroup1.Rectangle = Rectangle.FromLTRB(1, 2, 3, 4);
GroupInfo oGroup2 = new GroupInfo();
oGroup2.Vertices.AddLast(aoVertices[2]);
oGroup2.Vertices.AddLast(aoVertices[3]);
oGroup2.Rectangle = Rectangle.FromLTRB(5, 6, 7, 8);
GroupInfo oGroup3 = new GroupInfo();
oGroup3.Vertices.AddLast(aoVertices[4]);
oGroup3.Rectangle = Rectangle.FromLTRB(9, 10, 11, 12);
GroupMetadataManager.OnLayoutBegin(oGraph);
GroupMetadataManager.OnLayoutUsingGroupsEnd(oGraph,
new GroupInfo[] { oGroup1, oGroup2, oGroup3 },
GroupRectanglePenWidth, IntergroupEdgeStyle);
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsTrue(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
Assert.AreEqual(GroupRectanglePenWidth,
oGroupLayoutDrawingInfo.PenWidth);
IList <GroupInfo> oGroupInfo = oGroupLayoutDrawingInfo.GroupsToDraw;
Assert.AreEqual(3, oGroupInfo.Count);
Assert.AreEqual(oGroup1, oGroupInfo[0]);
Assert.AreEqual(oGroup2, oGroupInfo[1]);
Assert.AreEqual(oGroup3, oGroupInfo[2]);
Assert.IsTrue(oGraph.ContainsKey(
ReservedMetadataKeys.IntergroupEdgesHidden));
Assert.IsFalse(oEdge1.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsFalse(oEdge2.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge3.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge4.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge5.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge6.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge7.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsTrue(oEdge8.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.AreEqual(3,
oGroupLayoutDrawingInfo.CombinedIntergroupEdges.Count());
IntergroupEdgeInfo oCombinedIntergroupEdge;
oCombinedIntergroupEdge =
oGroupLayoutDrawingInfo.CombinedIntergroupEdges.Single(
intergroupEdgeInfo =>
intergroupEdgeInfo.Group1Index == 0
&&
intergroupEdgeInfo.Group2Index == 1
);
Assert.AreEqual(0, oCombinedIntergroupEdge.Group1Index);
Assert.AreEqual(1, oCombinedIntergroupEdge.Group2Index);
Assert.AreEqual(3, oCombinedIntergroupEdge.Edges);
oCombinedIntergroupEdge =
oGroupLayoutDrawingInfo.CombinedIntergroupEdges.Single(
intergroupEdgeInfo =>
intergroupEdgeInfo.Group1Index == 0
&&
intergroupEdgeInfo.Group2Index == 2
);
Assert.AreEqual(0, oCombinedIntergroupEdge.Group1Index);
Assert.AreEqual(2, oCombinedIntergroupEdge.Group2Index);
Assert.AreEqual(1, oCombinedIntergroupEdge.Edges);
oCombinedIntergroupEdge =
oGroupLayoutDrawingInfo.CombinedIntergroupEdges.Single(
intergroupEdgeInfo =>
intergroupEdgeInfo.Group1Index == 1
&&
intergroupEdgeInfo.Group2Index == 2
);
Assert.AreEqual(1, oCombinedIntergroupEdge.Group1Index);
Assert.AreEqual(2, oCombinedIntergroupEdge.Group2Index);
Assert.AreEqual(2, oCombinedIntergroupEdge.Edges);
}
TestOnLayoutBegin5()
{
// Request that intergroup edges be combined, although there are none.
const Double GroupRectanglePenWidth = 4.567;
const IntergroupEdgeStyle IntergroupEdgeStyle =
IntergroupEdgeStyle.Combine;
IGraph oGraph = new Graph(GraphDirectedness.Undirected);
IVertex[] aoVertices = TestGraphUtil.AddVertices(oGraph, 5);
IEdgeCollection oEdges = oGraph.Edges;
IEdge oEdge1 = oEdges.Add(aoVertices[0], aoVertices[1], false);
IEdge oEdge2 = oEdges.Add(aoVertices[2], aoVertices[3], false);
GroupInfo oGroup1 = new GroupInfo();
oGroup1.Vertices.AddLast(aoVertices[0]);
oGroup1.Vertices.AddLast(aoVertices[1]);
oGroup1.Rectangle = Rectangle.FromLTRB(1, 2, 3, 4);
GroupInfo oGroup2 = new GroupInfo();
oGroup2.Vertices.AddLast(aoVertices[2]);
oGroup2.Vertices.AddLast(aoVertices[3]);
oGroup2.Rectangle = Rectangle.FromLTRB(5, 6, 7, 8);
GroupInfo oGroup3 = new GroupInfo();
oGroup3.Vertices.AddLast(aoVertices[4]);
oGroup3.Rectangle = Rectangle.FromLTRB(9, 10, 11, 12);
GroupMetadataManager.OnLayoutBegin(oGraph);
GroupMetadataManager.OnLayoutUsingGroupsEnd(oGraph,
new GroupInfo[] { oGroup1, oGroup2, oGroup3 },
GroupRectanglePenWidth, IntergroupEdgeStyle);
GroupLayoutDrawingInfo oGroupLayoutDrawingInfo;
Assert.IsTrue(GroupMetadataManager.TryGetGroupLayoutDrawingInfo(
oGraph, out oGroupLayoutDrawingInfo));
Assert.AreEqual(GroupRectanglePenWidth,
oGroupLayoutDrawingInfo.PenWidth);
IList <GroupInfo> oGroupInfo = oGroupLayoutDrawingInfo.GroupsToDraw;
Assert.AreEqual(3, oGroupInfo.Count);
Assert.AreEqual(oGroup1, oGroupInfo[0]);
Assert.AreEqual(oGroup2, oGroupInfo[1]);
Assert.AreEqual(oGroup3, oGroupInfo[2]);
Assert.IsFalse(oGraph.ContainsKey(
ReservedMetadataKeys.IntergroupEdgesHidden));
Assert.IsFalse(oEdge1.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.IsFalse(oEdge2.ContainsKey(
ReservedMetadataKeys.SavedVisibility));
Assert.AreEqual(0,
oGroupLayoutDrawingInfo.CombinedIntergroupEdges.Count());
}