private Vertex findSingleVertex() {
Vertex vertex = selection.getAnyVertex();
// if there is no selection we select an existing vertex
if (vertex == null) {
vertex = (Vertex) graph.getVertices().next();
}
return vertex;
}
/**
* Post the context menu of one selected element of the current selection. If any dependencies are
* selected, show the menu for one of those. Otherwise show the menu for a randomly chosen target.
*/
private void postMenu() {
// first check whether we have selected edges
Dependency dependency = (Dependency) selection.getAnyEdge();
if (dependency != null) {
Point p =
((GraphPainterStdImpl) GraphPainterStdImpl.getInstance())
.getDependencyPainter(dependency)
.getPopupMenuPosition(dependency);
postMenu(dependency, p.x, p.y);
} else {
// if not, choose a target
Vertex vertex = selection.getAnyVertex();
if (vertex != null) {
selection.selectOnly(vertex);
int x = vertex.getX() + vertex.getWidth() - 20;
int y = vertex.getY() + 20;
postMenu(vertex, x, y);
}
}
}
private void selectDependency(KeyEvent evt) {
Vertex vertex = selection.getAnyVertex();
if (vertex != null && vertex instanceof DependentTarget) {
selection.selectOnly(vertex);
List<Dependency> dependencies = ((DependentTarget) vertex).dependentsAsList();
Dependency currentDependency = dependencies.get(currentDependencyIndex);
if (currentDependency != null) {
selection.remove(currentDependency);
}
currentDependencyIndex += (evt.getKeyCode() == KeyEvent.VK_PAGE_UP ? 1 : -1);
currentDependencyIndex %= dependencies.size();
if (currentDependencyIndex < 0) { // % is not a real modulo
currentDependencyIndex = dependencies.size() - 1;
}
currentDependency = (Dependency) dependencies.get(currentDependencyIndex);
if (currentDependency != null) {
selection.add(currentDependency);
}
}
}
