/**
* Changes the size of the underlying Layout.
*
* @param size The new size for the layout.
*/
private void setSize(Dimension size) {
ObservableCachingLayout<V, E> observableLayout = (ObservableCachingLayout) getGraphLayout();
Layout<V, E> tmpLayout = observableLayout;
while (!AbstractLayout.class.isAssignableFrom(tmpLayout.getClass()))
tmpLayout = ((LayoutDecorator<V, E>) tmpLayout).getDelegate();
AbstractLayout<V, E> layout = (AbstractLayout<V, E>) tmpLayout;
// the first time the graph is resized, re-initialize the layout to make sure it gets
// the right size. Any other time, just scale it. The first resize should be when the
// graph is made visible and laid out.
// this is kind of a hack; there may be a better way to handle this.
// I tried listening for componentShown, but it didn't work properly.
if (layoutInitialized < 1) {
layout.getSize().setSize(size);
layout.initialize();
layoutInitialized++;
return;
}
// change the size of the layout without triggering the automatic resizing.
double wScale = size.getWidth() / layout.getSize().getWidth();
double hScale = size.getHeight() / layout.getSize().getHeight();
double scale = Math.min(wScale, hScale);
layout.getSize().setSize(size);
Collection<V> vertices = new Vector(getVertices());
synchronized (graph) {
for (V v : vertices) {
double x =
layout.getX(v)
* scale; // Math.min( size.getWidth( ) - 10, Math.max( 10, layout.getX( v ) *
// scale ));
double y =
layout.getY(v)
* scale; // Math.min( size.getHeight( ) - 10, Math.max( 10, layout.getY( v ) *
// scale ));
layout.setLocation(v, new Point2D.Double(x, y));
}
}
// alert the ObservableLayout that things have changed.
observableLayout.fireStateChanged();
}
/**
* Sets a new Layout for the graph.
*
* @param layout The Layout instance to use for the new Graph Layout.
*/
public void setGraphLayout(Layout<V, E> layout) {
super.setGraphLayout(layout);
layout.initialize();
this.graph = (UndirectedSparseGraph<V, E>) this.getGraphLayout().getGraph();
}