I sent this question initially to the MigLayout forum, as it is, to some extent, specific to this particular layout manager, I would say. Unfortunately, this is already a week, without any comments, so I would like to answer this question here, in the hope that it is not considered an X-wiring.
Well, I have the following problem: In general, I would like to “gray out” some content (more precisely, the content of JPanel). I almost managed to achieve the desired effect by setting another JPanel to “flow” over the desired area with transparent color. There remained one serious problem: After I click the overlap panel, the components below will not immediately draw correctly. Instead, they will initially be drawn with some white color until, for example, I hide and enlarge the frame that could make the correct effect transparent.
As an example, I attached a screenshot of the buggy. Pay attention to the switches and checkboxes with their white appearance. In addition, I added code to play the effect. I am currently working on Windows 7, 32 bit with Java 1.5. (Java 1.6 does not matter).
I played a lot with various colors () / repaint () / (in / re) validate () / etc. methods. Nothing worked to draw the floor panel correctly right after its visibility.
Any ideas?
BR, Chris
EDIT1: Regarding the sample code - if you run it, you have to click the "Check" button to bring up the overlap panel. :) Another thing I noticed is that appearance problems vary depending on the UI L used & F. In my case, I used Windows once and once my own Java interface (is this called metal?), And they showed different results, although none of them worked properly: P
Error screenshot link: Screenshot
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import net.miginfocom.swing.MigLayout;
public class MigTest {
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new TestLayeredPane());
f.pack();
f.setVisible(true);
}
public static class TestLayeredPane extends JPanel {
private JPanel pnl_overlay_;
public TestLayeredPane() {
super();
this.setLayout(new MigLayout("fill, wrap 2", "", ""));
initLayout();
}
private void initLayout() {
JPanel pnl_direction = new JPanel(new MigLayout("wrap 3", "", ""));
JPanel pnl_settings = new JPanel(new MigLayout("wrap 1", "", ""));
JPanel pnl_input = new JPanel(new MigLayout("wrap 3", "", ""));
JLabel lbl_ask_for = new JLabel();
JLabel lbl_translation = new JLabel();
ButtonGroup btn_group_ = new ButtonGroup();
JRadioButton radiobtn_ask_lang1_ = new JRadioButton();
JRadioButton radiobtn_ask_lang2_ = new JRadioButton();
JRadioButton radiobtn_ask_random_ = new JRadioButton();
JCheckBox chkbox_loop_ = new JCheckBox();
JCheckBox chkbox_repeat_false_ = new JCheckBox();
JCheckBox chkbox_letter_count_ = new JCheckBox();
JCheckBox chkbox_ask_all_ = new JCheckBox();
JLabel lbl_progress_ = new JLabel();
JLabel lbl_question_ = new JLabel();
JButton btn_check_ = new JButton();
JButton btn_push_back_ = new JButton();
JTextField tfield_answer_ = new JTextField();
lbl_ask_for.setText("Ask for:");
lbl_translation.setText("translation");
radiobtn_ask_lang1_.setText("1st language");
radiobtn_ask_lang2_.setText("2nd language");
radiobtn_ask_random_.setText("Random language");
btn_group_.add(radiobtn_ask_lang1_);
btn_group_.add(radiobtn_ask_lang2_);
btn_group_.add(radiobtn_ask_random_);
chkbox_loop_.setText("Loop");
chkbox_repeat_false_.setText("Repeat false answers");
chkbox_letter_count_.setText("Show letter count");
chkbox_ask_all_.setText("Ask for 1st and 2nd language");
btn_check_.setText("Check");
btn_check_.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
finishTraining();
}
});
btn_push_back_.setText(" Push back");
pnl_direction.add(lbl_ask_for, "span 1 3");
pnl_direction.add(radiobtn_ask_lang1_);
pnl_direction.add(lbl_translation, "span 1 3");
pnl_direction.add(radiobtn_ask_lang2_);
pnl_direction.add(radiobtn_ask_random_);
pnl_settings.add(chkbox_loop_);
pnl_settings.add(chkbox_repeat_false_);
pnl_settings.add(chkbox_letter_count_);
pnl_settings.add(chkbox_ask_all_);
pnl_input.add(lbl_question_, "align center");
pnl_input.add(lbl_progress_, "span 2, align center");
pnl_input.add(tfield_answer_, "span 1 2, align center, w 200!");
pnl_input.add(btn_check_, "growy");
pnl_input.add(btn_push_back_);
pnl_overlay_ = new JPanel(new MigLayout("fill", "", ""));
pnl_overlay_.setBackground(new Color(127, 127, 127, 100));
this.add(pnl_overlay_, "pos (0%+2px) (0%+2px) (100%-2px) (100%-2px) ");
pnl_overlay_.setVisible(false);
this.add(pnl_direction, "gapbefore push");
this.add(pnl_settings, "gapafter push");
this.add(pnl_input, "span 2, gapbefore push, gapafter push");
}
private void finishTraining() {
for (Component comp : this.getComponents()) {
if (comp instanceof JPanel) {
for (Component comp2 : ((JPanel) comp).getComponents()) {
comp2.setEnabled(false);
}
}
else {
comp.setEnabled(false);
}
}
pnl_overlay_.setVisible(true);
}
}
}