comment puis-je renvoie correctement XxxSize de JComponent (s) ajouté à la JLabelretourne XxxSize de JComponent (s) ajouté à la JLabel
1er. Figure >>lets LayoutManager works like as for JPanel, JLabel returns Size(0, 0)
2. Figure >>added some PreferredSize to the JLabel
3. Figure >>calculated PreferredSize from JComponent(s) added to the JLabel
4. Figure >>lets LayoutManager works changed JLabel to JPanel, now LayoutManager correctly calculated Dimension without using any XxxSize
avis sice on utilise Nimbus L & F, même sortie est là pour tous accesible L & F
import java.awt.*;
import java.awt.event.*;
import java.util.LinkedList;
import java.util.Queue;
import javax.swing.*;
public class NimbusBorderPainterDemo extends JFrame {
private static final long serialVersionUID = 1L;
private JFrame frame = new JFrame();
private JPanel fatherPanel = new JPanel(), titlePanel = new JPanel();
private JLabel buttonPanel = new JLabel();
//figure ---> 4th. switch JLabel with JPanel
//private JPanel buttonPanel = new JPanel();
private Queue<Icon> iconQueue = new LinkedList<Icon>();
public NimbusBorderPainterDemo() {
iconQueue.add(UIManager.getIcon("OptionPane.errorIcon"));
iconQueue.add(UIManager.getIcon("OptionPane.informationIcon"));
iconQueue.add(UIManager.getIcon("OptionPane.warningIcon"));
JButton button0 = createButton();
JButton button1 = createButton();
JButton button2 = createButton();
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(1);
}
});
int gap = 5;
buttonPanel.setLayout(new GridLayout(0, 3, gap, 0));
buttonPanel.add(button0);
buttonPanel.add(button1);
buttonPanel.add(button2);
// figure 1st. ---> without PreferredSize
// figure 2nd. --->
//buttonPanel.setPreferredSize(new Dimension(160, 30));
// figure 3rd. --->
/*Dimension dim = button0.getPreferredSize();
int w = dim.width;
int h = dim.height;
w = (w + 5) * 3;
h += 4;
dim = new Dimension(w, h);
buttonPanel.setPreferredSize(dim);*/
titlePanel.setLayout(new BorderLayout());
titlePanel.add(new JLabel(nextIcon()), BorderLayout.WEST);
titlePanel.add(new JLabel("My Frame"), BorderLayout.CENTER);
titlePanel.setBorder(BorderFactory.createLineBorder(Color.GRAY));
titlePanel.add(buttonPanel, BorderLayout.EAST);
fatherPanel.setLayout(new BorderLayout());
fatherPanel.add(titlePanel, BorderLayout.CENTER);
frame.setUndecorated(true);
frame.add(fatherPanel);
frame.setLocation(50, 50);
frame.pack();
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
frame.setVisible(true);
}
private JButton createButton() {
JButton button = new JButton();
button.setBorderPainted(false);
button.setBorder(null);
button.setFocusable(false);
button.setMargin(new Insets(0, 0, 0, 0));
button.setContentAreaFilled(false);
button.setIcon(nextIcon());
//button.setRolloverIcon(nextIcon());
//button.setPressedIcon(nextIcon());
//button.setDisabledIcon(nextIcon());
nextIcon();
return button;
}
private Icon nextIcon() {
Icon icon = iconQueue.peek();
iconQueue.add(iconQueue.remove());
return icon;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception fail) {
}
UIManager.getLookAndFeelDefaults().put("nimbusFocus", Color.RED);
NimbusBorderPainterDemo nimbusBorderPainterDemo = new NimbusBorderPainterDemo();
}
});
}
}
+1 Bonne question, mais pourquoi faire de 'buttonPanel' un' JLabel'? – trashgod
@trashgod parce que 1) impossible de définir l'opacité ou la translucidité pour tous les regards et regards, par exemple en utilisant Nimbus requis un autre Woodoo pour cela, 2) J'ai vu belle usine popup basé sur JLabel – mKorbel
bien que techniquement possible, il est tout simplement faux d'utiliser un JLabel comme conteneur ... – kleopatra