/// <summary>
/// Initializes a new instance of the PathFinder class.
/// Path-finding will depend on the direction of arrows.
/// </summary>
/// <param name="diagram">A FlowChart instance in which to look for paths or cycles.</param>
public PathFinder(FlowChart diagram)
{
graph = new FCGraph(diagram, false);
ignoreDirection = false;
}
/// <summary>
/// Initializes a new instance of the PathFinder class.
/// </summary>
/// <param name="diagram">A FlowChart instance in which to look for paths or cycles.</param>
/// <param name="ignoreDirection">Specifies whether the direction of arrows
/// should be considered when looking for paths or cycles.</param>
public PathFinder(FlowChart diagram, bool ignoreDirection)
{
graph = new FCGraph(diagram, false, ignoreDirection);
this.ignoreDirection = ignoreDirection;
}
public virtual bool Arrange(FlowChart chart)
{
chart.UndoManager.onStartLayout("Anneal layout");
// Build the graph
FCGraph graph = new FCGraph(chart, _keepGroupLayout);
// Find the root adapter
Layout.INode rootNode = null;
if (_root != null)
{
foreach (FCNode node in graph.Nodes)
{
if (node.Node == _root)
{
rootNode = node;
break;
}
}
}
// Split graph to subgraphs
Layout.IGraph[] subgraphs = null;
if (_splitGraph)
{
subgraphs = Layout.GraphSplitter.Split(
graph, new FCGraphBuilder(chart, false));
}
else
{
subgraphs = new Layout.IGraph[] { graph };
}
// Create the layouter
Layout.AnnealLayout layout = new Layout.AnnealLayout();
Layout.LayoutProgress progress = null;
if (_progress != null)
progress = new Layout.LayoutProgress(this.OnLayoutProgress);
Layout.AnnealLayoutInfo info = new Layout.AnnealLayoutInfo();
info.DistributionFactor = this.DistributionFactor;
info.BoundaryFactor = this.BoundaryFactor;
info.EdgeLengthFactor = this.ArrowLengthFactor;
info.CrossingEdgesCost = this.CrossingArrowsCost;
info.NodeEdgeDistFactor = this.NodeArrowDistFactor;
info.IterationsPerStage = this.IterationsPerStage;
info.Stages = this.Stages;
info.Temperature = this.InitialTemperature;
info.TemperatureScale = this.TemperatureScale;
info.LayoutArea = this.LayoutArea;
info.WidthHeightRatio = this.WidthHeightRatio;
info.Randomize = this.Randomize;
float xOffset = 0;
foreach (FCGraph subgraph in subgraphs)
{
// If a root node is specified and the subgraph
// does not contain that node, do not arrange
// the subgraph
if (rootNode != null)
{
if (!subgraph.Nodes.Contains(rootNode))
continue;
}
layout.Arrange(subgraph, info, progress);
// Translate the whole subgraph
RectangleF graphBounds = subgraph.GetBounds(false);
float xToMove = xOffset - graphBounds.X;
float yToMove = -graphBounds.Y;
foreach (FCNode node in subgraph.Nodes)
{
RectangleF nodeBounds = node.Bounds;
RectangleF oldBounds = node.Node.BoundingRect;
nodeBounds.X += xToMove;
nodeBounds.Y += yToMove;
node.Bounds = nodeBounds;
if (_layoutNode != null)
_layoutNode(node.Node, oldBounds);
}
xOffset += graphBounds.Width;
// Update arrows
foreach (FCLink link in subgraph.Links)
{
Arrow arrow = link.Arrow;
if (arrow.IgnoreLayout)
continue;
// If the arrow being arranged is dynamic,
// ignore the anchoring flag?
if (arrow.Dynamic)
arrow.updatePosFromOrgAndDest(false);
arrow.arrangePoints(_anchoring);
if (_layoutLink != null)
_layoutLink(arrow);
}
}
chart.Invalidate();
chart.UndoManager.onEndLayout();
return true;
}
public virtual bool Arrange(FlowChart chart)
{
chart.UndoManager.onStartLayout("Grid layout");
// Build the graph
FCGraph graph = new FCGraph(chart, _keepGroupLayout);
// Find the root adapter
Layout.INode rootNode = null;
if (_root != null)
{
foreach (FCNode node in graph.Nodes)
{
if (node.Node == _root)
{
rootNode = node;
break;
}
}
}
// Split graph to subgraphs
Layout.IGraph[] subgraphs = null;
if (_splitGraph)
{
subgraphs = Layout.GraphSplitter.Split(
graph, new FCGraphBuilder(chart, false));
}
else
{
subgraphs = new Layout.IGraph[] { graph };
}
// Create the layouter
Layout.GridLayout layout = new Layout.GridLayout();
Layout.LayoutProgress progress = null;
if (_progress != null)
progress = new Layout.LayoutProgress(this.OnLayoutProgress);
Layout.GridLayoutInfo info = new Layout.GridLayoutInfo();
info.GridSize = this.GridSize;
info.Iterations = this.Iterations;
info.XGap = this.XGap;
info.YGap = this.YGap;
info.RndSeed = this.RndSeed;
float xOffset = XGap;
foreach (FCGraph subgraph in subgraphs)
{
// If a root node is specified and the subgraph
// does not contain that node, do not arrange
// the subgraph
if (rootNode != null)
{
if (!subgraph.Nodes.Contains(rootNode))
continue;
}
// Set the start and end nodes
info.StartNode = null;
info.EndNode = null;
foreach (FCNode node in subgraph.Nodes)
{
if (node.Node == _startNode)
info.StartNode = node;
if (node.Node == _endNode)
info.EndNode = node;
}
// Ensure both start and end nodes are set
if (info.StartNode == null || info.EndNode == null)
{
info.StartNode = null;
info.EndNode = null;
}
layout.Arrange(subgraph, info, progress);
// Translate the whole subgraph
RectangleF graphBounds = subgraph.GetBounds(false);
float xToMove = xOffset - graphBounds.X;
float yToMove = info.YGap - graphBounds.Y;
foreach (FCNode node in subgraph.Nodes)
{
RectangleF nodeBounds = node.Bounds;
RectangleF oldBounds = node.Node.BoundingRect;
nodeBounds.X += xToMove;
nodeBounds.Y += yToMove;
node.Bounds = nodeBounds;
if (_layoutNode != null)
_layoutNode(node.Node, oldBounds);
}
xOffset += graphBounds.Width + info.GridSize;
// Update arrows
foreach (FCLink link in subgraph.Links)
{
if (link.Arrow.IgnoreLayout)
continue;
link.Arrow.arrangePoints(_anchoring);
if (_layoutLink != null)
_layoutLink(link.Arrow);
}
}
chart.RouteAllArrows();
chart.Invalidate();
chart.UndoManager.onEndLayout();
return true;
}
public virtual bool Arrange(FlowChart chart)
{
chart.UndoManager.onStartLayout("Layered layout");
// Disable undo to prevent unneeded actions.
// For example: RouteAllArrows is invoked each time
// when a new dummy box is created, which is a very
// expensive operation even with no AutoRoute arrows present.
bool undo = chart.UndoManager.UndoEnabled;
chart.UndoManager.enable(false);
// Build the graph
FCGraph graph = new FCGraph(chart, _keepGroupLayout);
// Find the root adapter
Layout.INode rootNode = null;
if (_root != null)
{
foreach (FCNode node in graph.Nodes)
{
if (node.Node == _root)
{
rootNode = node;
break;
}
}
}
// Split graph to subgraphs
Layout.IGraph[] subgraphs = Layout.GraphSplitter.Split(
graph, new FCGraphBuilder(chart, false));
// Make sure all arrows are polylines with 1 segment.
// Arrows' AutoRoute flag is also undesired.
// Note: Process only the arrows belonging to
// the subgraph, which contains the specified root (if any)
if (rootNode == null)
{
foreach (Arrow arrow in chart.Arrows)
{
if (arrow.isReflexive())
continue;
arrow.AutoRoute = false;
arrow.Style = MindFusion.FlowChartX.ArrowStyle.Polyline;
arrow.SegmentCount = 1;
}
}
else
{
foreach (FCGraph subgraph in subgraphs)
{
if (subgraph.Nodes.Contains(rootNode))
{
foreach (FCLink link in subgraph.Links)
{
Arrow arrow = link.Arrow;
if (arrow.isReflexive())
continue;
arrow.AutoRoute = false;
arrow.Style = MindFusion.FlowChartX.ArrowStyle.Polyline;
arrow.SegmentCount = 1;
}
break;
}
}
}
// Create the layouter
Layout.LayeredLayout layout = new Layout.LayeredLayout();
Layout.LayoutProgress progress = null;
if (_progress != null)
progress = new Layout.LayoutProgress(this.OnLayoutProgress);
Layout.LayeredLayoutInfo info = new Layout.LayeredLayoutInfo();
info.ArrowsCompactFactor = this.ArrowsCompactFactor;
info.Direction = (Layout.Direction)this.Direction;
info.LayerDistance = this.LayerDistance;
info.NodeDistance = this.NodeDistance;
info.Orientation = (Layout.Orientation)this.Orientation;
info.SplitLayers = this.SplitLayers;
info.XGap = this.XGap;
info.YGap = this.YGap;
info.TimeLimit = this.TimeLimit;
float xOffset = this.XGap;
foreach (FCGraph subgraph in subgraphs)
{
// If a root node is specified and the subgraph
// does not contain that node, do not arrange
// the subgraph
if (rootNode != null)
{
if (!subgraph.Nodes.Contains(rootNode))
continue;
}
layout.Arrange(subgraph, info, progress);
// Translate the whole subgraph
RectangleF graphBounds = subgraph.GetBounds(true);
float xToMove = xOffset - graphBounds.X;
float yToMove = this.YGap - graphBounds.Y;
foreach (FCNode node in subgraph.Nodes)
{
RectangleF nodeBounds = node.Bounds;
RectangleF oldBounds = node.Node.BoundingRect;
nodeBounds.X += xToMove;
nodeBounds.Y += yToMove;
node.Bounds = nodeBounds;
if (_layoutNode != null)
_layoutNode(node.Node, oldBounds);
}
// Update arrows' inner points; the end points
// must have already been offset by the loop above
foreach (FCLink link in subgraph.Links)
{
// Arrows that retain form need not be updated
if (link.Arrow.RetainForm)
continue;
for (int i = 1; i < link.Arrow.Points.Count - 1; i++)
{
PointF pt = link.Arrow.Points[i];
pt.X += xToMove;
pt.Y += yToMove;
link.Arrow.Points[i] = pt;
}
}
xOffset += graphBounds.Width + this.XGap;
// Update arrows
foreach (FCLink link in subgraph.Links)
{
Arrow arrow = link.Arrow;
if (arrow.IgnoreLayout)
continue;
// Update end points
if (arrow.SegmentCount == 1)
{
arrow.arrangePoints(_anchoring);
}
else
{
int orgnAnchor = arrow.OrgnAnchor;
int destAnchor = arrow.DestAnchor;
arrow.Points[0] = arrow.getOrgnLink().getIntersection(
arrow.Origin.getCenter(), arrow.Points[1]);
arrow.Points[arrow.Points.Count - 1] = arrow.getDestLink().getIntersection(
arrow.Points[arrow.Points.Count - 2], arrow.Destination.getCenter());
switch (_anchoring)
{
case Anchoring.Ignore:
// Do nothing
break;
case Anchoring.Keep:
if (orgnAnchor >= 0)
{
arrow.OrgnAnchor = -1;
arrow.OrgnAnchor = orgnAnchor;
}
if (destAnchor >= 0)
{
arrow.DestAnchor = -1;
arrow.DestAnchor = destAnchor;
}
break;
case Anchoring.Reassign:
arrow.Points[0] =
arrow.Origin.getNearestAnchor(
arrow.Points[0], arrow, false, ref orgnAnchor);
arrow.Points[arrow.Points.Count - 1] =
arrow.Destination.getNearestAnchor(
arrow.Points[arrow.Points.Count - 1], arrow, true, ref destAnchor);
arrow.setOrgnAnchor(orgnAnchor);
arrow.setDestAnchor(destAnchor);
break;
}
}
arrow.UpdateFromPoints();
if (_layoutLink != null)
_layoutLink(arrow);
}
}
chart.Invalidate();
chart.UndoManager.enable(undo);
chart.UndoManager.onEndLayout();
return true;
}
public virtual bool Arrange(FlowChart chart)
{
chart.UndoManager.onStartLayout("Spring layout");
// Build the graph
FCGraph graph = new FCGraph(chart, _keepGroupLayout);
// Find the root adapter
Layout.INode rootNode = null;
if (_root != null)
{
foreach (FCNode node in graph.Nodes)
{
if (node.Node == _root)
{
rootNode = node;
break;
}
}
}
// Split graph to subgraphs
Layout.IGraph[] subgraphs = Layout.GraphSplitter.Split(
graph, new FCGraphBuilder(chart, false));
// Create the layouter
Layout.SpringLayout layout = new Layout.SpringLayout();
layout.Stretch = _stretch;
Layout.LayoutProgress progress = null;
if (_progress != null)
progress = new Layout.LayoutProgress(this.OnLayoutProgress);
Layout.SpringLayoutInfo info = new Layout.SpringLayoutInfo();
info.IterationCount = this.IterationCount;
info.MinimizeCrossings = this.MinimizeCrossings;
info.NodeDistance = this.NodeDistance;
info.EnableClusters = this.EnableClusters;
info.RepulsionFactor = this.RepulsionFactor;
info.RndSeed = this.RndSeed;
float xOffset = 0;
foreach (FCGraph subgraph in subgraphs)
{
// If a root node is specified and the subgraph
// does not contain that node, do not arrange
// the subgraph
if (rootNode != null)
{
if (!subgraph.Nodes.Contains(rootNode))
continue;
}
layout.Arrange(subgraph, info, progress);
// Translate the whole subgraph
RectangleF graphBounds = subgraph.GetBounds(false);
float xToMove = xOffset - graphBounds.X;
float yToMove = -graphBounds.Y;
foreach (FCNode node in subgraph.Nodes)
{
RectangleF nodeBounds = node.Bounds;
RectangleF oldBounds = node.Node.BoundingRect;
nodeBounds.X += xToMove;
nodeBounds.Y += yToMove;
node.Bounds = nodeBounds;
if (_layoutNode != null)
_layoutNode(node.Node, oldBounds);
}
xOffset += graphBounds.Width + this.NodeDistance;
// Update arrows
foreach (FCLink link in subgraph.Links)
{
Arrow arrow = link.Arrow;
if (arrow.IgnoreLayout)
continue;
// If the arrow being arranged is dynamic,
// ignore the anchoring flag?
if (arrow.Dynamic)
arrow.updatePosFromOrgAndDest(false);
arrow.arrangePoints(_anchoring);
if (_layoutLink != null)
_layoutLink(arrow);
}
}
chart.Invalidate();
chart.UndoManager.onEndLayout();
return true;
}
/// <summary>
/// Performs the arrangement.
/// </summary>
public virtual bool Arrange(FlowChart chart)
{
if (_ignoreArrowDirection && _root == null)
return false;
chart.UndoManager.onStartLayout("Tree layout");
// Build the graph
FCGraph graph = null;
if (_reversedArrows)
{
graph = new ReversedFCGraph(chart,
_keepGroupLayout, _ignoreArrowDirection);
}
else
{
graph = new FCGraph(chart,
_keepGroupLayout, _ignoreArrowDirection);
}
// Get the root node within the graph
Layout.INode rootNode = null;
if (_root != null)
{
foreach (FCNode node in graph.Nodes)
{
if (node.Node == _root)
{
rootNode = node;
break;
}
}
}
CalculateAnchors();
// Split graph to subgraphs
Layout.IGraph[] subgraphs =
Layout.GraphSplitter.Split(graph,
new FCGraphBuilder(chart, _reversedArrows));
float xOffset = this.XGap;
foreach (FCGraph subgraph in subgraphs)
{
Layout.INode theRoot = null;
if (subgraph.Nodes.Contains(rootNode))
{
// The root node of the user is within this
// subgraph - respect the user's wishes
theRoot = rootNode;
}
else
{
// If the user specified a root node,
// arrange only the graph, containing
// that node
if (rootNode != null)
continue;
// If the subgraph has root node, use it,
// otherwise select the first node as root
Layout.INode subRoot = subgraph.Root;
if (subRoot == null)
theRoot = subgraph.Nodes[0];
else
theRoot = subRoot;
}
// Check if the root is layoutable
if ((theRoot as FCNode).Node.Frozen)
continue;
Layout.LayoutProgress progress = null;
if (_progress != null)
progress = new Layout.LayoutProgress(
this.OnLayoutProgress);
Layout.TreeLayoutInfo info =
new Layout.TreeLayoutInfo();
info.Direction = (Layout.TreeLayoutDirection)this.Direction;
info.KeepRootPosition = this.KeepRootPosition;
info.LevelDistance = this.LevelDistance;
info.NodeDistance = this.NodeDistance;
info.StretchFactor = this.StretchFactor;
info.XGap = this.XGap;
info.YGap = this.YGap;
if (_layoutNode != null)
{
// remember the old positions
foreach (FCNode node in subgraph.Nodes)
node.Node.setData(Constants.OLD_BOUNDS, node.Node.BoundingRect);
}
// Arrange the subgraph
switch (_type)
{
case TreeLayoutType.Cascading:
new Layout.BorderTreeLayout().Arrange(
theRoot, info, progress);
break;
case TreeLayoutType.Centered:
new Layout.CenterTreeLayout().Arrange(
theRoot, info, progress);
break;
case TreeLayoutType.Radial:
new Layout.RadialTreeLayout().Arrange(
theRoot, info, progress);
break;
}
// If the root is not at fixed position, translate the whole tree
if (!this.KeepRootPosition)
{
RectangleF graphBounds = subgraph.GetBounds(false);
float xToMove = xOffset - graphBounds.X;
float yToMove = this.YGap - graphBounds.Y;
foreach (FCNode node in subgraph.Nodes)
{
RectangleF nodeBounds = node.Bounds;
nodeBounds.X += xToMove;
nodeBounds.Y += yToMove;
node.Bounds = nodeBounds;
}
xOffset += graphBounds.Width + this.XGap;
}
if (_layoutNode != null)
{
// raise the LayoutNode event for each node
foreach (FCNode node in subgraph.Nodes)
_layoutNode(node.Node, (RectangleF)node.Node.getData(Constants.OLD_BOUNDS));
chart.clearRuntimeData(Constants.OLD_BOUNDS);
}
// Update the arrows in this particular subgraph
ArrayList visitedLinks = new ArrayList();
ArrayList nodes = new ArrayList();
nodes.Add(theRoot);
while (nodes.Count > 0)
{
FCNode node = nodes[0] as FCNode;
nodes.RemoveAt(0);
if (node.Node.Frozen)
continue;
foreach (FCLink link in node.OutLinks)
{
if (!visitedLinks.Contains(link))
{
visitedLinks.Add(link);
if (!link.Arrow.IgnoreLayout)
{
if (link.Destination == node)
{
UpdateArrow(link.Arrow, true);
nodes.Add(link.Origin);
}
else
{
UpdateArrow(link.Arrow, false);
nodes.Add(link.Destination);
}
if (_layoutLink != null)
_layoutLink(link.Arrow);
}
}
}
}
}
chart.Invalidate();
chart.UndoManager.onEndLayout();
return true;
}
