All geek questions in one place

Layout Manager and Positioning

  • how to insert JLabel in GlassPane in rellative, floating coordinates from JProgressBar without using ComponentListener or another listener,

  • Are there any built-in identifiers in Standard LayoutManagers that can notify about their internal state and can be redefined, instead my attempt is with ComponentListener and NullLayout

enter image description here

.

enter image description here

SSCCE near ComponentListener and NullLayout

 import java.awt.Container; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.GridBagConstraints; import java.awt.event.ComponentAdapter; import java.awt.event.ComponentEvent; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JProgressBar; import javax.swing.JRadioButton; import javax.swing.UIManager; //http://stackoverflow.com/questions/14560680/jprogressbar-low-values-will-not-be-displayed public class ProgressSample { private JFrame frame = new JFrame("GlassPane instead of JLayer"); private JLabel label; private GridBagConstraints gbc = new GridBagConstraints(); private JProgressBar progressSeven; public ProgressSample() { frame.setLayout(new FlowLayout()); frame.add(new JButton("test")); frame.add(new JCheckBox("test")); frame.add(new JRadioButton("test")); // Nothing is displayed if value is lover that 6 JProgressBar progressSix = new JProgressBar(0, 100); progressSix.setValue(2); frame.add(progressSix); // but this works value is higher that 6 progressSeven = new JProgressBar(0, 100); progressSeven.addComponentListener(new ComponentAdapter() { @Override public void componentMoved(ComponentEvent e) { label.setBounds( (int) progressSeven.getBounds().getX(), (int) progressSeven.getBounds().getY(), progressSeven.getPreferredSize().width, label.getPreferredSize().height); } }); progressSeven.setValue(7); frame.add(progressSeven); label = new JLabel(); label.setText("<html>Blablabla, Blablablabla<br>" + "Blablabla, Blablablabla<br>" + "Blablabla, Blablablabla</html>"); label.setPreferredSize(new Dimension( progressSeven.getPreferredSize().width, label.getPreferredSize().height)); Container glassPane = (Container) frame.getRootPane().getGlassPane(); glassPane.setVisible(true); glassPane.setLayout(null); glassPane.add(label, gbc); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { e.printStackTrace(); } ProgressSample dialogTest = new ProgressSample(); } }
+6
source share
1 answer

how to bind JLabel in GlassPane to Slavic, floating coordinates from JProgressBar without using ComponentListener or another listener

My idea would be to wrap two components in a container using OverlayLayout and "play" with AlignementX / AlignementY for relative coordinates. Then simply place the packaging container in the original hierarchy. (See My SSCCE below)

Are there any built-in identifiers in Standard LayoutManagers that can notify of its internal state and can be redefined, instead my attempt is with ComponentListener and NullLayout

There is no such contract in the LayoutManager API, so you cannot reliably rely on any such mechanism. Moreover, you will run into problems with the standard LayoutManager, because they take into account your additional JLabel in the layout.

Imagine you are using FlowLayout and you put 1 component, then your additional JLabel , then another component. When you move the additional JLabel , the last component will remain “away” from the first component, and you will see a gap between the two.

If this last problem is not a problem, you can simply extend the FlowLayout (or any other LayoutManager ), override the layoutContainer and place an additional layoutContainer wherever you want.

 import java.awt.Container; import java.awt.FlowLayout; import java.awt.GridBagConstraints; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JProgressBar; import javax.swing.JRadioButton; import javax.swing.OverlayLayout; import javax.swing.UIManager; //http://stackoverflow.com/questions/14560680/jprogressbar-low-values-will-not-be-displayed public class ProgressSample { private JFrame frame = new JFrame("GlassPane instead of JLayer"); private JLabel label; private GridBagConstraints gbc = new GridBagConstraints(); private JProgressBar progressSeven; public ProgressSample() { frame.setLayout(new FlowLayout()); frame.add(new JButton("test")); frame.add(new JCheckBox("test")); frame.add(new JRadioButton("test")); // Nothing is displayed if value is lover that 6 JProgressBar progressSix = new JProgressBar(0, 100); progressSix.setValue(2); frame.add(progressSix); JPanel wrappingPanel = new JPanel(); OverlayLayout mgr = new OverlayLayout(wrappingPanel); wrappingPanel.setLayout(mgr); progressSeven = new JProgressBar(0, 100); progressSeven.setAlignmentX(0.0f); progressSeven.setAlignmentY(0.0f); frame.add(wrappingPanel); label = new JLabel(); label.setText("<html>Blablabla, Blablablabla<br>" + "Blablabla, Blablablabla<br>" + "Blablabla, Blablablabla</html>"); label.setAlignmentX(0.0f); label.setAlignmentY(0.0f); wrappingPanel.add(label); wrappingPanel.add(progressSeven); Container glassPane = (Container) frame.getRootPane().getGlassPane(); glassPane.setVisible(true); glassPane.setLayout(new FlowLayout()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { e.printStackTrace(); } ProgressSample dialogTest = new ProgressSample(); } }
+5
source

Source: https://habr.com/ru/post/952197/

More articles:


All Articles