Swing (JComboBox) Fehler? Druckmaß

Ich untersuchte die Dimension von JComboBox (ich weiß nicht, wenn es mit anderem Swing-Objekt dargestellt wird).Swing (JComboBox) Fehler? Druckmaß

Das Problem tritt auf, wenn die Abmessungen gedruckt werden. Ist es ein Fehler?

Hier mein Code:

JPanel jpPanelOut = new JPanel(); 
    jpPanelOut.setBackground(new java.awt.Color(255, 255, 255)); 
    jpPanelOut.setLayout(new BoxLayout(jpPanelOut, BoxLayout.PAGE_AXIS)); 

    JPanel jpPanel = new JPanel(); 
    jpPanel.setPreferredSize(new Dimension(800, 26)); 

    Font inFont = new Font("Serif", Font.PLAIN, 10); 
    JPanel jpPanel0 = new JPanel(); 
    jpPanel0.setLayout(new BoxLayout(jpPanel0, BoxLayout.LINE_AXIS)); 

    JLabel jlLabel0 = new JLabel("this is a new text"); 
    jlLabel0.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 
    jlLabel0.setFont(inFont); 

    JSlider jslSlider0 = new JSlider(JSlider.HORIZONTAL, 0, 1000000000, 1); 
    jslSlider0.setFont(inFont); 

    JSpinner jspSpinner0 = new JSpinner(new SpinnerNumberModel(1, 0, 1000000000, 1)); 
    jspSpinner0.setFont(inFont); 

    JTextField jtfTextField0 = new JTextField("1234567890abcdef_gpqyTÑ",48); 
    jtfTextField0.setFont(inFont); 

    JComboBox jcbComboBox0 = new JComboBox<>(new String[] {"Average"}); 
    jcbComboBox0.setFont(inFont); 
    ((JLabel)jcbComboBox0.getRenderer()).setHorizontalAlignment(JLabel.RIGHT); 

    jpPanel0.add(jlLabel0); 
    jpPanel0.add(jslSlider0); 
    jpPanel0.add(jspSpinner0); 
    jpPanel0.add(jtfTextField0); 
    jpPanel0.add(jcbComboBox0); 



    inFont = new Font("Serif", Font.PLAIN, 10); 
    JPanel jpPanel1 = new JPanel(); 
    jpPanel1.setLayout(new BoxLayout(jpPanel1, BoxLayout.LINE_AXIS)); 

    JLabel jlLabel1 = new JLabel("this is a new text"); 
    jlLabel1.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 
    jlLabel1.setFont(inFont); 

    JSlider jslSlider1 = new JSlider(JSlider.HORIZONTAL, 0, 1000000000, 1); 
    jslSlider1.setFont(inFont); 

    JSpinner jspSpinner1 = new JSpinner(new SpinnerNumberModel(1, 0, 1000000000, 1)); 
    jspSpinner1.setFont(inFont); 

    JTextField jtfTextField1 = new JTextField("1234567890abcdef_gpqyTÑ",48); 
    jtfTextField1.setFont(inFont); 

    JComboBox jcbComboBox1 = new JComboBox<>(new String[] {"Average"}); 
    jcbComboBox1.setFont(inFont); 
    ((JLabel)jcbComboBox1.getRenderer()).setHorizontalAlignment(JLabel.RIGHT); 

    jpPanel1.add(jlLabel1); 
    jpPanel1.add(jslSlider1); 
    jpPanel1.add(jspSpinner1); 
    jpPanel1.add(jtfTextField1); 
    jpPanel1.add(jcbComboBox1); 

    System.out.println("Height:" 
     + " jtfTextField:" + jtfTextField1.getPreferredSize().getHeight() + "," 
     + jtfTextField1.getMinimumSize().getHeight() 
     + " jlLabel:" + jlLabel1.getPreferredSize().getHeight() + "," 
     + jlLabel1.getMinimumSize().getHeight() 
     + " jcbComboBox:" + jcbComboBox1.getPreferredSize().getHeight() + "," 
     + jcbComboBox1.getMinimumSize().getHeight() 
     + " jslSlider:" + jslSlider1.getPreferredSize().getHeight() + "," 
     + jslSlider1.getMinimumSize().getHeight() 
     + " jspSpinner:" + jspSpinner1.getPreferredSize().getHeight() + "," 
     + jspSpinner1.getMinimumSize().getHeight() 
     ); 

    jpPanelOut.add(jpPanel); 
    jpPanelOut.add(jpPanel0); 
    jpPanelOut.add(jpPanel1);

Aber die Dimension geändert werden !!!

Schauen Sie bitte:

Die appereance (Breite) von JTextFields Red Circle

Der appereance (Text) von JComboBoxs Green Line

Code Complete

package myPackage; 

import javax.swing.*; 
import java.awt.*; 


public class NewJFrame extends javax.swing.JFrame { 

    public NewJFrame() { 
    initComponents(); 
    } 

    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

    jButton1 = new javax.swing.JButton(); 
    jPanel1 = new javax.swing.JPanel(); 

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

    jButton1.setText("jButton1"); 
    jButton1.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
     jButton1ActionPerformed(evt); 
     } 
    }); 

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); 
    jPanel1.setLayout(jPanel1Layout); 
    jPanel1Layout.setHorizontalGroup(
     jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGap(0, 0, Short.MAX_VALUE) 
    ); 
    jPanel1Layout.setVerticalGroup(
     jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGap(0, 220, Short.MAX_VALUE) 
    ); 

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
    getContentPane().setLayout(layout); 
    layout.setHorizontalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 
     .addContainerGap(739, Short.MAX_VALUE) 
     .addComponent(jButton1) 
     .addContainerGap()) 
     .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
    ); 
    layout.setVerticalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(layout.createSequentialGroup() 
     .addComponent(jButton1) 
     .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
     .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
     .addGap(0, 51, Short.MAX_VALUE)) 
    ); 

    pack(); 
    }// </editor-fold>       

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {           
    // TODO add your handling code here: 
    JPanel jpPanelOut = new JPanel(); 
    jpPanelOut.setBackground(new Color(255, 255, 255)); 
    jpPanelOut.setLayout(new BoxLayout(jpPanelOut, BoxLayout.PAGE_AXIS)); 

    JPanel jpPanel = new JPanel(); 
    jpPanel.setPreferredSize(new Dimension(600, 26)); 

    Font inFont = new Font("Serif", Font.PLAIN, 10); 
    JPanel jpPanel0 = new JPanel(); 
    jpPanel0.setLayout(new BoxLayout(jpPanel0, BoxLayout.LINE_AXIS)); 

    JLabel jlLabel0 = new JLabel("this is a new text"); 
    jlLabel0.setBorder(BorderFactory.createEtchedBorder()); 
    jlLabel0.setFont(inFont); 

    JSlider jslSlider0 = new JSlider(JSlider.HORIZONTAL, 0, 1000000000, 1); 
    jslSlider0.setFont(inFont); 

    JSpinner jspSpinner0 = new JSpinner(new SpinnerNumberModel(1, 0, 1000000000, 1)); 
    jspSpinner0.setFont(inFont); 

    JTextField jtfTextField0 = new JTextField("1234567890abcdef_gpqyTÑ",48); 
    jtfTextField0.setFont(inFont); 

    JComboBox jcbComboBox0 = new JComboBox<>(new String[] {"Average"}); 
    jcbComboBox0.setFont(inFont); 
    ((JLabel)jcbComboBox0.getRenderer()).setHorizontalAlignment(JLabel.RIGHT); 

    jpPanel0.add(jlLabel0); 
    jpPanel0.add(jslSlider0); 
    jpPanel0.add(jspSpinner0); 
    jpPanel0.add(jtfTextField0); 
    jpPanel0.add(jcbComboBox0); 



    inFont = new Font("Serif", Font.PLAIN, 10); 
    JPanel jpPanel1 = new JPanel(); 
    jpPanel1.setLayout(new BoxLayout(jpPanel1, BoxLayout.LINE_AXIS)); 

    JLabel jlLabel1 = new JLabel("this is a new text"); 
    jlLabel1.setBorder(BorderFactory.createEtchedBorder()); 
    jlLabel1.setFont(inFont); 

    JSlider jslSlider1 = new JSlider(JSlider.HORIZONTAL, 0, 1000000000, 1); 
    jslSlider1.setFont(inFont); 

    JSpinner jspSpinner1 = new JSpinner(new SpinnerNumberModel(1, 0, 1000000000, 1)); 
    jspSpinner1.setFont(inFont); 

    JTextField jtfTextField1 = new JTextField("1234567890abcdef_gpqyTÑ",48); 
    jtfTextField1.setFont(inFont); 

    JComboBox jcbComboBox1 = new JComboBox<>(new String[] {"Average"}); 
    jcbComboBox1.setFont(inFont); 
    ((JLabel)jcbComboBox1.getRenderer()).setHorizontalAlignment(JLabel.RIGHT); 

    jpPanel1.add(jlLabel1); 
    jpPanel1.add(jslSlider1); 
    jpPanel1.add(jspSpinner1); 
    jpPanel1.add(jtfTextField1); 
    jpPanel1.add(jcbComboBox1); 

    System.out.println("Height:" 
     + " jtfTextField:" + jtfTextField1.getPreferredSize().getHeight() + "," 
     + jtfTextField1.getMinimumSize().getHeight() 
     + " jlLabel:" + jlLabel1.getPreferredSize().getHeight() + "," 
     + jlLabel1.getMinimumSize().getHeight() 
     + " jcbComboBox:" + jcbComboBox1.getPreferredSize().getHeight() + "," 
     + jcbComboBox1.getMinimumSize().getHeight() 
     + " jslSlider:" + jslSlider1.getPreferredSize().getHeight() + "," 
     + jslSlider1.getMinimumSize().getHeight() 
     + " jspSpinner:" + jspSpinner1.getPreferredSize().getHeight() + "," 
     + jspSpinner1.getMinimumSize().getHeight() 
     ); 

    jpPanelOut.add(jpPanel); 
    jpPanelOut.add(jpPanel0); 
    jpPanelOut.add(jpPanel1); 
    jPanel1.removeAll(); 
    jPanel1.setLayout(new GridLayout(1, 1)); 
    jPanel1.add(jpPanelOut); 
    }           


    public static void main(String args[]) { 
    /* Set the Nimbus look and feel */ 
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> 
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
    */ 
    try { 
     for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
     if ("Nimbus".equals(info.getName())) { 
      javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
      break; 
     } 
     } 
    } catch (ClassNotFoundException ex) { 
     java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (InstantiationException ex) { 
     java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (IllegalAccessException ex) { 
     java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
     java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } 
    //</editor-fold> 

    /* Create and display the form */ 
    java.awt.EventQueue.invokeLater(new Runnable() { 
     public void run() { 
     new NewJFrame().setVisible(true); 
     } 
    }); 
    } 

    // Variables declaration - do not modify      
    private javax.swing.JButton jButton1; 
    private javax.swing.JPanel jPanel1; 
    // End of variables declaration     
}

Quelle

2016-03-29 QA_Col

Neue proper [SSCCE] (http://sscce.org/), der das Problem demonstriert. – camickr

mit dem Code zur Verfügung gestellt das Problem reproduziert werden kann. Tatsächlich sind bei diesem Code die beiden unteren Bereiche in dem Bild enthalten. Es ist kein Code mehr erforderlich, um das Problem zu reproduzieren. –

Ich kann den geposteten Code nicht kompilieren und testen, daher kann ich das Problem nicht reproduzieren. – camickr

Ich konnte einen besseren SSCCE erstellen, indem ich den actionListener-Code vereinfachte, um die Komponente, die das Problem verursacht hatte, einfacher zu demonstrieren. Ein SSCCE sollte nur den relevanten Code enthalten, der das Problem aufzeigt.

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { 
    JPanel jpPanelOut = new JPanel(); 
    jpPanelOut.setBackground(new Color(255, 255, 255)); 
    jpPanelOut.setLayout(new BoxLayout(jpPanelOut, BoxLayout.PAGE_AXIS)); 

    JPanel jpPanel0 = new JPanel(); 
    JComboBox jcbComboBox0 = new JComboBox<>(new String[] {"Average"}); 
    jpPanel0.add(jcbComboBox0); 

    JPanel jpPanel1 = new JPanel(); 
    JComboBox jcbComboBox1 = new JComboBox<>(new String[] {"Average"}); 
    jpPanel1.add(jcbComboBox1); 

    SwingUtilities.invokeLater(new Runnable() 
    { 
     public void run() 
     { 
      System.out.println("Height:" 
       + " jcbComboBox:" + jcbComboBox1.getPreferredSize().getHeight() + "," 
      ); 
     } 
    }); 

    jpPanelOut.add(jpPanel0); 
    jpPanelOut.add(jpPanel1); 
    jPanel1.removeAll(); 
    jPanel1.setLayout(new GridLayout(1, 1)); 
    jPanel1.add(jpPanelOut); 
}

Also im Grunde das Problem ist die System.out.println (...) führt auf einem separaten Thread. Alle Updates für eine Swing-Komponente sollten im Event Dispatch Thread ausgeführt werden. Die getPreferredSize() Methode auf der Combobox verursacht eine Änderung in der Kombinationsfeld außerhalb der EDT, die irgendwie ein Problem verursacht.

Eine Lösung besteht darin, den Code in ein SwingUtilities.invokeLater zu wickeln. Eine andere Lösung besteht darin, die Anweisung System.out.println (...) an das Ende der Methode zu verschieben. Beide Lösungen ermöglichen, dass die Kombinationsbox vor dem Drucken der Höhe auf dem EDT korrekt realisiert wird.

Quelle

2016-03-30 03:05:02 camickr

Vielleicht nur dieses Problem auftritt unter Nimbus(Synth)LookAndFeel:

SynthArrowButtonUI

public Dimension getPreferredSize(JComponent c) { 
    SynthContext context = getContext(c); 
    Dimension dim = null; 
    if (context.getComponent().getName() == "ScrollBar.button") { 
    //... 
    } 
    if (dim == null) { 
    // For all other cases (including Spinner, ComboBox), we will 
    // fall back on the single ArrowButton.size value to create 
    // a square return value 
    int size = context.getStyle().getInt(context, "ArrowButton.size", 16); 
     dim = new Dimension(size, size); 
    } 
//...

NimbusComboBoxSizeTest

import java.awt.*; 
import javax.swing.*; 

public class NimbusComboBoxSizeTest { 
    public JComponent makeUI() { 
    String[] model = {"Average"}; 

    JPanel p0 = new JPanel(); 
    JComboBox<String> combo0 = new JComboBox<>(model); 
    p0.add(combo0); 

    JPanel p1 = new JPanel(); 
    JComboBox<String> combo1 = new JComboBox<>(model); 
    p1.add(combo1); 

    Box box = Box.createVerticalBox(); 
    box.add(p0); 
    box.add(p1); 

    EventQueue.invokeLater(() -> System.out.println("combo0: " + combo0.getPreferredSize())); 
    System.out.println("combo1: " + combo1.getPreferredSize()); 

    JPanel p = new JPanel(new BorderLayout()); 
    p.add(box, BorderLayout.NORTH); 

    return p; 
    } 
    public static void main(String[] args) { 
    EventQueue.invokeLater(() -> { 
     try { 
     for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) { 
      if ("Nimbus".equals(laf.getName())) { 
      UIManager.setLookAndFeel(laf.getClassName()); 
      UIDefaults d = UIManager.getLookAndFeelDefaults(); 
      System.out.println("ArrowButton.size: " + d.getInt("ArrowButton.size")); 
      System.out.println("ComboBox.arrowButton.size: " + d.getInt("ComboBox:\"ComboBox.arrowButton\".size")); 
      d.put("ArrowButton.size", 19); 
      //or: d.put("ComboBox:\"ComboBox.arrowButton\".size", 16); 
      } 
     } 
     } catch (Exception ex) { 
     ex.printStackTrace(); 
     } 
     JFrame f = new JFrame(); 
     f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
     f.getContentPane().add(new NimbusComboBoxSizeTest().makeUI()); 
     f.setSize(320, 240); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    }); 
    } 
}

ArrowButton.size: 16
ComboBox.arrowButton.size: 19
combo1: java.awt.Dimension[width=74,height=26]
combo0: java.awt.Dimension[width=77,height=26]

Quelle

2016-03-31 05:56:05 aterai

Swing (JComboBox) Fehler? Druckmaß

Antwort

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