/// <summary>
/// Aggregates all nodes of the original graph by the selector and runs the layout.
/// </summary>
/// <remarks>
/// Before aggregating the nodes, all existing aggregations are
/// <see cref="AggregateGraphWrapper.SeparateAll">separated</see>.
/// </remarks>
private void AggregateAll <TKey>(Func <INode, TKey> selector, Func <TKey, INodeStyle> styleFactory)
{
AggregateGraph.SeparateAll();
foreach (var grouping in Graph.Nodes.GroupBy(selector).ToList())
{
Aggregate(grouping.ToList(), grouping.Key, styleFactory);
}
RunLayout();
}
/// <summary>
/// Fills the context menu with menu items based on the clicked node.
/// </summary>
private void OnPopulateItemContextMenu(object sender, PopulateItemContextMenuEventArgs <IModelItem> e)
{
// first update the selection
INode node = e.Item as INode;
// if the cursor is over a node select it, else clear selection
UpdateSelection(node);
// Create the context menu items
var selectedNodes = graphControl.Selection.SelectedNodes;
if (selectedNodes.Count > 0)
{
// only allow aggregation operations on nodes that are not aggregation nodes already
var aggregateAllowed = selectedNodes.Any(n => !AggregateGraph.IsAggregationItem(n));
var aggregateByShape =
new ToolStripMenuItem("Aggregate Nodes with Same Shape")
{
Enabled = aggregateAllowed
};
aggregateByShape.Click += (o, args) => AggregateSame(selectedNodes.ToList(), ShapeSelector,
ShapeStyle);
e.Menu.Items.Add(aggregateByShape);
var aggregateByColor =
new ToolStripMenuItem("Aggregate Nodes with Same Color")
{
Enabled = aggregateAllowed
};
aggregateByColor.Click += (o, args) => AggregateSame(selectedNodes.ToList(), ColorSelector, ColorStyle);
e.Menu.Items.Add(aggregateByColor);
var aggregateByShapeAndColor =
new ToolStripMenuItem("Aggregate Nodes with Same Shape and Color")
{
Enabled = aggregateAllowed
};
aggregateByShapeAndColor.Click += (o, args) =>
AggregateSame(selectedNodes.ToList(), ShapeAndColorSelector, ShapeAndColorStyle);
e.Menu.Items.Add(aggregateByShapeAndColor);
var separateAllowed = selectedNodes.Any(n => AggregateGraph.IsAggregationItem(n));
var separate = new ToolStripMenuItem("Separate")
{
Enabled = separateAllowed
};
separate.Click += (o, args) => Separate(selectedNodes.ToList());
e.Menu.Items.Add(separate);
}
else
{
var aggregateByShape = new ToolStripMenuItem("Aggregate All Nodes by Shape");
aggregateByShape.Click += (o, args) => AggregateAll(ShapeSelector, ShapeStyle);
e.Menu.Items.Add(aggregateByShape);
var aggregateByColor = new ToolStripMenuItem("Aggregate All Nodes by Color");
aggregateByColor.Click += (o, args) => AggregateAll(ColorSelector, ColorStyle);
e.Menu.Items.Add(aggregateByColor);
var aggregateByShapeAndColor = new ToolStripMenuItem("Aggregate All Nodes by Shape and Color");
aggregateByShapeAndColor.Click += (o, args) => AggregateAll(ShapeAndColorSelector, ShapeAndColorStyle);
e.Menu.Items.Add(aggregateByShapeAndColor);
var separateAllowed = Graph.Nodes.Any(n => AggregateGraph.IsAggregationItem(n));
var separateAll = new ToolStripMenuItem("Separate All")
{
Enabled = separateAllowed
};
separateAll.Click += (o, args) => {
AggregateGraph.SeparateAll();
RunLayout();
};
e.Menu.Items.Add(separateAll);
}
e.ShowMenu = true;
e.Handled = true;
}