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| public class BorderDrawerComponent extends LayerUI<JComponent> {
/**
*
*/
private static final long serialVersionUID = 1L;
private final List<BorderDrawComponentGroup> groups;
public BorderDrawerComponent() {
this.groups=new ArrayList<>();
}
public void addGroup(BorderDrawComponentGroup group) {
if ( !groups.contains(group) ) {
groups.add(group);
}
}
@Override
public void installUI(JComponent c) {
super.installUI(c);
@SuppressWarnings("unchecked")
JLayer<? extends JComponent> l = (JLayer<? extends JComponent>) c;
update(l);
l.addComponentListener(new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent e) {
update(l);
l.repaint();
}
});
}
/*@Override
public void doLayout(JLayer<? extends JComponent> l) {
super.doLayout(l);
update(l);
}*/
private void update(JLayer<? extends JComponent> l) {
Map<JComponent, Rectangle> bounds = new HashMap<>();
getInnerComponents(l.getView(), l.getView(), bounds);
for(BorderDrawComponentGroup group : groups) {
group.setBounds( bounds );
}
}
private void getInnerComponents(JComponent root,
JComponent component, Map<JComponent, Rectangle> bounds) {
bounds.put( component, getBoundsInRoot(root, component));
for(Component child : component.getComponents()) {
if ( child instanceof JComponent ) {
getInnerComponents(root, (JComponent) child, bounds);
}
}
}
private Rectangle getBoundsInRoot(JComponent root, JComponent component) {
Rectangle bounds = SwingUtilities.convertRectangle(component.getParent(), component.getBounds(), root);
return bounds;
}
@Override
public void paint(Graphics g, JComponent c) {
super.paint(g, c);
for(BorderDrawComponentGroup group : groups) {
group.draw(g, c);
}
}
public static class BorderDrawComponentGroup {
private final JComponent[] components;
private final Border border;
private final int margin;
private Rectangle bounds;
public BorderDrawComponentGroup(Border border, int margin, JComponent...components) {
Objects.requireNonNull(components);
Objects.requireNonNull(border);
this.components = Arrays.copyOf(components, components.length);
this.border = border;
this.margin = margin;
}
public void draw(Graphics g, JComponent c) {
if ( bounds!=null ) {
border.paintBorder(c, g, bounds.x, bounds.y, bounds.width, bounds.height);
}
}
private void setBounds(Map<JComponent, Rectangle> bounds) {
this.bounds = null;
for(JComponent component : components ) {
Rectangle componentBounds = bounds.get(component);
if ( componentBounds!=null ) {
this.bounds = this.bounds==null?componentBounds:this.bounds.union(componentBounds);
}
}
if ( this.bounds!=null ) {
this.bounds.x-=margin;
this.bounds.y-=margin;
this.bounds.width+=margin+margin;
this.bounds.height+=margin+margin;
}
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("Démo");
JPanel panel = new JPanel(new GridBagLayout());
JComponent[] components = new JComponent[4];
int componentIndex=0;
JComponent[] component2s = new JComponent[4];
int component2Index=0;
for(int i=0; i<25; i++ ) {
int x= i/5;
int y = i%5;
JLabel label = new JLabel("Exemple " + i);
panel.add(label, new GridBagConstraints(x,y,1,1,0,0,GridBagConstraints.CENTER,GridBagConstraints.NONE, new Insets(5, 5, 5, 5),0, 0));
if ( x>=2 && x<=3 && y>=2 && y<=3 ) {
components[componentIndex++]=label;
}
if ( x>=3 && x<=5 && y>=3 && y<=4 ) {
component2s[component2Index++]=label;
}
}
BorderDrawerComponent layerUI = new BorderDrawerComponent();
JLayer<JComponent> jlayer = new JLayer<JComponent>(panel, layerUI);
layerUI.addGroup(new BorderDrawComponentGroup(BorderFactory.createLineBorder(Color.RED), 5, components));
layerUI.addGroup(new BorderDrawComponentGroup(BorderFactory.createDashedBorder(Color.BLUE, 5, 5), 1, component2s));
frame.getContentPane().add(jlayer);
frame.setSize(600, 400);
frame.setVisible(true);
}
} |
