GridBagLayout에서 임의의 너비 설정

Question

키보드 레이아웃을 만들려고했는데, 여기에서 버튼의 너비를 지정할 수 있습니다. 따라서 GridBagLayout으로 시도했지만 성공하지 못했습니다. 내 문제를 설명하기 위해 나는이 (Button2를, 버튼 4, Button1에서, Button6)을 얻을 것으로 예상 간단한 예를 들어, 한 :

을 대신 나는 버튼 4 더블 폭의 Button6 얻을.

코드는 다음과 같습니다

:

는

package views; 

import java.awt.BorderLayout; 
import java.awt.EventQueue; 
import java.awt.GridBagConstraints; 
import java.awt.GridBagLayout; 

import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 

public class TestLayout extends JFrame { 

    public static void main(String[] args) { 
     EventQueue.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       new TestLayout().setVisible(true); 
      } 
     }); 
    } 

    public TestLayout() { 
     JButton btn; 
     setBounds(0, 0, 444, 111); 
     setLayout(new GridBagLayout()); 
     GridBagConstraints gbc = new GridBagConstraints(); 
     gbc.fill = GridBagConstraints.BOTH; 

     gbc.gridy = 1;//ROW 1 
     btn = new JButton("Button 1");gbc.gridx = 0;gbc.gridwidth = 1;add(btn, gbc); 
     btn = new JButton("Button 2");gbc.gridx = 1;gbc.gridwidth = 2;add(btn, gbc); 
     btn = new JButton("Button 3");gbc.gridx = 3;gbc.gridwidth = 1;add(btn, gbc); 
     btn = new JButton("Button 4");gbc.gridx = 4;gbc.gridwidth = 2;add(btn, gbc); 

     gbc.gridy = 2;//ROW 2 
     btn = new JButton("Button 5");gbc.gridx = 0;gbc.gridwidth = 2;add(btn, gbc); 
     btn = new JButton("Button 6");gbc.gridx = 2;gbc.gridwidth = 2;add(btn, gbc); 
     btn = new JButton("Button 7");gbc.gridx = 4;gbc.gridwidth = 1;add(btn, gbc); 
     btn = new JButton("Button 8");gbc.gridx = 5;gbc.gridwidth = 1;add(btn, gbc); 
    } 
} 

또한, 내 목표는 내가이 레이아웃 매니저를 얻을 수없는 행 사이에 상관 관계와 같은 키보드 무엇인가를 정의하는 것입니다

Answer 1

나는이 문제를 Why does this GridBagLayout not appear as planned? &까지 가져갔습니다. camickr은 더미 행의 각 구성 요소를 사용하여이를 해결했습니다 (각각 gridwidth).

이들 2 개 사진 보여

하단 1 픽셀 높이 투명 이미지를 사용하는 코드의 '최소한의 "버전을

1. .
2. 상단에서 5px 높이의 단색 검정 이미지를 사용하는 더 분명한 버전입니다.

---

import java.awt.*; 
import java.awt.image.BufferedImage; 
import javax.swing.*; 
import javax.swing.border.*; 

public class KeyBoardLayout { 

    private JComponent ui = null; 

    KeyBoardLayout(boolean lowImpact) { 
     initUI(lowImpact); 
    } 

    public void initUI(boolean lowImpact) { 
     if (ui != null) { 
      return; 
     } 

     ui = new JPanel(new GridBagLayout()); 
     ui.setBorder(new EmptyBorder(4, 4, 4, 4)); 
     GridBagConstraints gbc = new GridBagConstraints(); 
     gbc.weightx = .5; 
     gbc.weighty = .5; 
     gbc.fill = GridBagConstraints.BOTH; 

     /* This code adds a dummy (invisible) row of components, 1 per 
     single gridwidth column. It has the effect of forcing the GBL width 
     to the size we would expect, proportional to each gridwidth assigned. 
     The problem with this (simple) approach is that the perfect 
     width will change according to PLAF and the content/preferred 
     size of the visible components. */ 
     // TODO! improve on use of 'magic numbers' 
     int w = 30; // adjust width per requirement 
     int h = lowImpact ? 1 : 5; // 1 for small height/border, 5 for large 
     // TYPE_INT_RGB for black 
     // TYPE_INT_ARGB for invisible 
     int t = lowImpact ? 
       BufferedImage.TYPE_INT_ARGB : 
       BufferedImage.TYPE_INT_RGB; 
     // an icon for the dummy row 
     ImageIcon ii = new ImageIcon(new BufferedImage(w, h, t)); 
     ui.setBorder(new CompoundBorder(
       ui.getBorder(), new EmptyBorder(0, 0, h, 0))); 
     // put a 'padding cell' in each column of the top row 
     // to force the layout to respect each individual column 
     for (int i = 0; i < 22; i++) { 
      gbc.gridx = i; 
      gbc.gridy = 4; 
      ui.add(new JLabel(ii)); 
     } 

     gbc.gridx = 0; 
     gbc.gridy = 1; 
     gbc.gridwidth = 3; 
     ui.add(new JButton("1,1 (3)"), gbc); 

     gbc.gridx = 3; 
     gbc.gridwidth = 2; 
     ui.add(new JButton("2,1 (2)"), gbc); 

     gbc.gridx = 5; 
     ui.add(new JButton("3,1 (2)"), gbc); 

     gbc.gridx = 7; 
     ui.add(new JButton("4,1 (2)"), gbc); 

     gbc.gridx = 9; 
     ui.add(new JButton("5,1 (2)"), gbc); 

     gbc.gridx = 11; 
     ui.add(new JButton("6,1 (2)"), gbc); 

     gbc.gridx = 13; 
     ui.add(new JButton("7,1 (2)"), gbc); 

     gbc.gridx = 15; 
     gbc.gridwidth = 3; 
     ui.add(new JButton("8,1 (3)"), gbc); 

     gbc.gridx = 18; 
     gbc.gridwidth = 4; 
     ui.add(new JButton("9,1 (4)"), gbc); 

     gbc.gridx = 0; 
     gbc.gridy = 2; 
     ui.add(new JButton("1,2 (4)"), gbc); 

     gbc.gridx = 4; 
     gbc.gridwidth = 2; 
     ui.add(new JButton("2,2 (2)"), gbc); 

     gbc.gridx = 6; 
     ui.add(new JButton("3,2 (2)"), gbc); 

     gbc.gridx = 8; 
     ui.add(new JButton("4,2 (2)"), gbc); 

     gbc.gridx = 10; 
     ui.add(new JButton("5,2 (2)"), gbc); 

     gbc.gridx = 12; 
     ui.add(new JButton("6,2 (2)"), gbc); 

     gbc.gridx = 14; 
     ui.add(new JButton("7,2 (2)"), gbc); 

     gbc.gridx = 16; 
     ui.add(new JButton("8,2 (2)"), gbc); 

     gbc.gridx = 18; 
     gbc.gridwidth = 4; 
     ui.add(new JButton("9,2 (4)"), gbc); 

     gbc.gridx = 0; 
     gbc.gridy = 3; 
     gbc.gridwidth = 5; 
     ui.add(new JButton("1,3 (5)"), gbc); 

     gbc.gridx = 5; 
     gbc.gridwidth = 2; 
     ui.add(new JButton("2,3 (2)"), gbc); 

     gbc.gridx = 7; 
     ui.add(new JButton("3,3 (2)"), gbc); 

     gbc.gridx = 9; 
     ui.add(new JButton("4,3 (2)"), gbc); 

     gbc.gridx = 11; 
     ui.add(new JButton("5,3 (2)"), gbc); 

     gbc.gridx = 13; 
     ui.add(new JButton("6,3 (2)"), gbc); 

     gbc.gridx = 15; 
     ui.add(new JButton("7,3 (2)"), gbc); 

     gbc.gridx = 17; 
     ui.add(new JButton("8,3 (2)"), gbc); 

     gbc.gridx = 19; 
     gbc.gridwidth = 3; 
     ui.add(new JButton("9,3 (3)"), gbc); 

     gbc.gridx = 0; 
     gbc.gridy = 4; 
     gbc.gridwidth = 3; 
     ui.add(new JButton("1,4 (3)"), gbc); 

     gbc.gridx = 3; 
     ui.add(new JButton("2,4 (3)"), gbc); 

     gbc.gridx = 6; 
     gbc.gridwidth = 10; 
     ui.add(new JButton("3,4 (10)"), gbc); 

     gbc.gridx = 16; 
     gbc.gridwidth = 3; 
     ui.add(new JButton("4,4 (3)"), gbc); 

     gbc.gridx = 19; 
     ui.add(new JButton("5,4 (3)"), gbc); 

     gbc.gridx = 0; 
     gbc.gridy = 4; 
     gbc.gridwidth = 1; 
    } 

    public JComponent getUI() { 
     return ui; 
    } 

    public static void main(String[] args) { 
     Runnable r = new Runnable() { 
      @Override 
      public void run() { 
       try { 
        UIManager.setLookAndFeel(
          UIManager.getSystemLookAndFeelClassName()); 
       } catch (Exception useDefault) { 
       } 
       for (int ii = 0; ii < 2; ii++) { 
        KeyBoardLayout o = new KeyBoardLayout(ii==0); 

        JFrame f = new JFrame("Keyboard Layout"); 
        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 
        f.setLocationByPlatform(true); 

        f.setContentPane(o.getUI()); 
        f.pack(); 
        f.setMinimumSize(f.getSize()); 

        f.setVisible(true); 
       } 
      } 
     }; 
     SwingUtilities.invokeLater(r); 
    } 
}