if(dimensionComputed) return;
GDimension d = getDimension();
for (int i = 0; i < graphs.size(); i++) {
GGraph graph = graphs.get(i);
d.maxWidth(graph.getDimension().width);
d.addUp(graph.getDimension().up);
d.addDown(graph.getDimension().down);
if (i > 0) {
d.addDown(GContext.LINE_SPACE);
}