private void refreshLabelBounds(IFigure figure, GraphLabel label) {
Rectangle figureBounds = figure.getBounds();
if (figureBounds.width * figureBounds.height > 0) {
label.setText(label.getText()); // hack: resets label's size
Dimension labelSize = label.getSize();
labelSize.expand(-6, -4);
Point anchorPoint = figure.getBounds().getBottomRight();
anchorPoint.x -= labelSize.width / 2;
anchorPoint.y -= labelSize.height / 2;
Rectangle bounds = new Rectangle(anchorPoint, labelSize);
label.setBounds(bounds);
label.getParent().setConstraint(label, bounds);
} else {
label.getParent().setConstraint(label, new Rectangle(figureBounds.x, figureBounds.y, 0, 0));
label.setBounds(new Rectangle(figureBounds.x, figureBounds.y, 0, 0));
}
}
void updateNodeLabel(InternalNodeLayout internalNode) {
if (internalNode.isDisposed()) {
return;
}
IFigure figure = internalNode.getNode().getFigure();
GraphLabel label = (GraphLabel) nodeFigureToLabel.get(figure);
IFigure fisheye = getFisheyeFigure(figure);
if (fisheye != null) {
figure = fisheye;
}
if (label == null) {
label = new GraphLabel(false);
label.setForegroundColor(ColorConstants.white);
label.setBackgroundColor(ColorConstants.red);
FontData fontData = Display.getDefault().getSystemFont().getFontData()[0];
fontData.setHeight(6);
label.setFont(new Font(Display.getCurrent(), fontData));
figure.addFigureListener(nodeFigureListener);
addLabelForFigure(figure, label);
nodeFigureToLabel.put(figure, label);
}
GraphNode graphNode = internalNode.getNode();
if (!graphNode.getGraphModel().canExpand(graphNode)
|| graphNode.getGraphModel().canCollapse(graphNode)
|| internalNode.isPruned()) {
label.setVisible(false);
} else {
NodeLayout[] successors = internalNode.getSuccessingNodes();
int numberOfHiddenSuccessors = 0;
for (int i = 0; i < successors.length; i++) {
if (successors[i].isPruned()) {
numberOfHiddenSuccessors++;
}
}
String labelText = numberOfHiddenSuccessors > 0 ? "" + numberOfHiddenSuccessors : "";
if (!labelText.equals(label.getText())) {
label.setText(labelText);
}
label.setVisible(true);
}
refreshLabelBounds(figure, label);
}