QGAL: keep references to layout vertices

We used to keep a reference just to the first vertex of the layout
(corresponding to the left/top anchor point) inside the Graph class,
as "root vertex". Since the notion of rootVertex isn't used by the
Graph itself, now this is stored outside the graph, and we also store
the central and last vertices.

This avoids using internalVertex() function to find out the vertices
based on the item (in the case, the 'q'). This will be useful when we
do simplify vertices, since the original layout vertice might not be
the "layout vertice" in the graph.

Signed-off-by: Caio Marcelo de Oliveira Filho <caio.oliveira@openbossa.org>
Reviewed-by: Eduardo M. Fleury <eduardo.fleury@openbossa.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicsanchorlayout_p.h b/src/gui/graphicsview/qgraphicsanchorlayout_p.h
index 7dd0d65..7d7bdb6 100644
--- a/src/gui/graphicsview/qgraphicsanchorlayout_p.h
+++ b/src/gui/graphicsview/qgraphicsanchorlayout_p.h
@@ -504,6 +504,10 @@ public:
     // Internal graph of anchorage points and anchors, for both orientations
     Graph<AnchorVertex, AnchorData> graph[2];
 
+    AnchorVertex *layoutFirstVertex[2];
+    AnchorVertex *layoutCentralVertex[2];
+    AnchorVertex *layoutLastVertex[2];
+
     // Graph paths and constraints, for both orientations
     QMultiHash<AnchorVertex *, GraphPath> graphPaths[2];
     QList<QSimplexConstraint *> constraints[2];