如何使左或右的GridBagLayout单元里面

如何使左或右的GridBagLayout单元里面

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如何使左或右的GridBagLayout单元里面？

本文介绍了如何使左或右的GridBagLayout单元里面？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我看到的GridBagLayout 位置是儿童细胞内的中心对齐。如何对齐左边还是右边？

更新

构建code（我知道我可以重复使用 C ）

  //按键面板
    JPanel的button_panel =新的JPanel（）;
    button_panel.add（ok_button）;
    button_panel.add（cancel_button）;

    //将控件对话框
    的GridBagConstraints℃;

    GridBagLayout的布局=新的GridBagLayout（）;
    的setLayout（布局）;

    C =新的GridBagConstraints（）;
    c.gridx = 0;
    c.gridy = 0;

    加（inputSource_label，C）;

    C =新的GridBagConstraints（）;
    c.gridx = 1;
    c.gridy = 0;
    加（inputSource_combo，C）;

    C =新的GridBagConstraints（）;
    c.gridx = 0;
    c.gridy = 1;
    加（output_label，C）;

    C =新的GridBagConstraints（）;
    c.gridx = 1;
    c.gridy = 1;
    加（output_combo，C）;

    C =新的GridBagConstraints（）;
    c.gridx = 0;
    c.gridy = 2;
    c.gridwidth = 2;
    加（button_panel，C）;

解决方案

在使用的GridBagLayout JLabel的一个表格显示：JTextField中，我希望有一种方法，使我的GridBagConstraints我根据对x，y位置。例如像这样：

 私人的GridBagConstraints createGbc（INT X，int y）对{
      GridBagConstraints的GBC =新的GridBagConstraints（）;
      gbc.gridx = X;
      gbc.gridy = Y;
      gbc.gridwidth = 1;
      gbc.gridheight = 1;

      gbc.anchor =（X == 0）？ GridBagConstraints.WEST：GridBagConstraints.EAST;
      gbc.fill =（X == 0）？ GridBagConstraints.BOTH
            ：GridBagConstraints.HORIZONTAL;

      gbc.insets =（X == 0）？ WEST_INSETS：EAST_INSETS;
      gbc.weightx =（X == 0）？ 0.1：1.0;
      gbc.weighty = 1.0;
      返回GBC;
   }

下面code使一个图形用户界面，如下所示：

 进口java.awt.GridBagConstraints中;
进口java.awt.GridBagLayout中;
进口java.awt.Insets中;
进口的java.util.HashMap;
进口的java.util.Map;

进口的javax.swing *。

公共类GridBagEg {
   私有静态无效createAndShowGui（）{
      PlayerEditorPanel playerEditorPane =新PlayerEditorPanel（）;

      INT结果= JOptionPane.showConfirmDialog（空，playerEditorPane，
            编辑播放器，JOptionPane.OK_CANCEL_OPTION，
            JOptionPane.PLAIN_MESSAGE）;
      如果（结果== JOptionPane.OK_OPTION）{
         // TODO：做一些与信息

         对于（PlayerEditorPanel.FieldTitle fieldTitle：
            PlayerEditorPanel.FieldTitle.values​​（））{
            System.out.printf（％10秒：％S％N，fieldTitle.getTitle（）
                  playerEditorPane.getFieldText（fieldTitle））;
         }
      }
   }

   公共静态无效的主要（字串[] args）{
      SwingUtilities.invokeLater（新的Runnable（）{
         公共无效的run（）{
            createAndShowGui（）;
         }
      }）;
   }
}

@燮pressWarnings（串行）
类PlayerEditorPanel继承JPanel {
   枚举FieldTitle {
      名称（名称），速度（速度），力量（力量）;
      私人字符串名称;

      私人FieldTitle（字符串名称）{
         this.title =称号;
      }

      公共字符串的getTitle（）{
         返回称号;
      }
   };

   私有静态最后插图WEST_INSETS =新的插图（5,0，5,5）;
   私有静态最后插图EAST_INSETS =新的插图（5,5，5，0）;
   私人地图＆LT; FieldTitle，JTextField的＆GT; fieldMap =新的HashMap＆LT; FieldTitle，JTextField的＆GT;（）;

   公共PlayerEditorPanel（）{
      的setLayout（新的GridBagLayout（））;
      setBorder（BorderFactory.createCompoundBorder（
            BorderFactory.createTitledBorder（玩家编辑器），
            BorderFactory.createEmptyBorder（5,5，5,5）））;
      GridBagConstraints的GBC;
      的for（int i = 0; I＆LT; FieldTitle.values​​（）的长度;我++）{
         FieldTitle fieldTitle = FieldTitle.values​​（）[我]
         GBC = createGbc（0，I）;
         添加（新的JLabel（fieldTitle.getTitle（）+：，JLabel.LEFT），GBC）;
         GBC = createGbc（1，I）;
         的JTextField textField的=新的JTextField（10）;
         加（textField的，GBC）;

         fieldMap.put（fieldTitle，textfield的情况）;
      }
   }

   私人GridBagConstraints的createGbc（INT X，int y）对{
      GridBagConstraints的GBC =新的GridBagConstraints（）;
      gbc.gridx = X;
      gbc.gridy = Y;
      gbc.gridwidth = 1;
      gbc.gridheight = 1;

      gbc.anchor =（X == 0）？ GridBagConstraints.WEST：GridBagConstraints.EAST;
      gbc.fill =（X == 0）？ GridBagConstraints.BOTH
            ：GridBagConstraints.HORIZONTAL;

      gbc.insets =（X == 0）？ WEST_INSETS：EAST_INSETS;
      gbc.weightx =（X == 0）？ 0.1：1.0;
      gbc.weighty = 1.0;
      返回GBC;
   }

   公共字符串getFieldText（FieldTitle fieldTitle）{
      返回fieldMap.get（fieldTitle）.getText（）;
   }

}

在这个例子中，我显示的JPanel中的JOptionPane，但它可以很容易地显示在一个JFrame或JApplet的或JDialog的，或...

I see that GridBagLayout positions it's children with center alignment within cells. How to align left or right?

UPDATE

Constructing code (I know I could reuse c)

    // button panel
    JPanel button_panel = new JPanel();
    button_panel.add(ok_button);
    button_panel.add(cancel_button);

    // placing controls to dialog
    GridBagConstraints c;

    GridBagLayout layout = new GridBagLayout();
    setLayout(layout);

    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = 0;

    add(inputSource_label, c);

    c = new GridBagConstraints();
    c.gridx = 1;
    c.gridy = 0;
    add(inputSource_combo, c);

    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = 1;
    add(output_label, c);

    c = new GridBagConstraints();
    c.gridx = 1;
    c.gridy = 1;
    add(output_combo, c);

    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = 2;
    c.gridwidth = 2;
    add(button_panel, c);
解决方案

When using GridBagLayout for a tabular display of JLabel : JTextField, I like to have a method that makes my GridBagConstraints for me based on the x, y position. For example something like so:

   private GridBagConstraints createGbc(int x, int y) {
      GridBagConstraints gbc = new GridBagConstraints();
      gbc.gridx = x;
      gbc.gridy = y;
      gbc.gridwidth = 1;
      gbc.gridheight = 1;

      gbc.anchor = (x == 0) ? GridBagConstraints.WEST : GridBagConstraints.EAST;
      gbc.fill = (x == 0) ? GridBagConstraints.BOTH
            : GridBagConstraints.HORIZONTAL;

      gbc.insets = (x == 0) ? WEST_INSETS : EAST_INSETS;
      gbc.weightx = (x == 0) ? 0.1 : 1.0;
      gbc.weighty = 1.0;
      return gbc;
   }

The following code makes a GUI that looks like this: 

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.util.HashMap;
import java.util.Map;

import javax.swing.*;

public class GridBagEg {
   private static void createAndShowGui() {
      PlayerEditorPanel playerEditorPane = new PlayerEditorPanel();

      int result = JOptionPane.showConfirmDialog(null, playerEditorPane,
            "Edit Player", JOptionPane.OK_CANCEL_OPTION,
            JOptionPane.PLAIN_MESSAGE);
      if (result == JOptionPane.OK_OPTION) {
         // TODO: do something with info

         for (PlayerEditorPanel.FieldTitle fieldTitle :
            PlayerEditorPanel.FieldTitle.values()) {
            System.out.printf("%10s: %s%n", fieldTitle.getTitle(),
                  playerEditorPane.getFieldText(fieldTitle));
         }
      }
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}

@SuppressWarnings("serial")
class PlayerEditorPanel extends JPanel {
   enum FieldTitle {
      NAME("Name"), SPEED("Speed"), STRENGTH("Strength");
      private String title;

      private FieldTitle(String title) {
         this.title = title;
      }

      public String getTitle() {
         return title;
      }
   };

   private static final Insets WEST_INSETS = new Insets(5, 0, 5, 5);
   private static final Insets EAST_INSETS = new Insets(5, 5, 5, 0);
   private Map<FieldTitle, JTextField> fieldMap = new HashMap<FieldTitle, JTextField>();

   public PlayerEditorPanel() {
      setLayout(new GridBagLayout());
      setBorder(BorderFactory.createCompoundBorder(
            BorderFactory.createTitledBorder("Player Editor"),
            BorderFactory.createEmptyBorder(5, 5, 5, 5)));
      GridBagConstraints gbc;
      for (int i = 0; i < FieldTitle.values().length; i++) {
         FieldTitle fieldTitle = FieldTitle.values()[i];
         gbc = createGbc(0, i);
         add(new JLabel(fieldTitle.getTitle() + ":", JLabel.LEFT), gbc);
         gbc = createGbc(1, i);
         JTextField textField = new JTextField(10);
         add(textField, gbc);

         fieldMap.put(fieldTitle, textField);
      }
   }

   private GridBagConstraints createGbc(int x, int y) {
      GridBagConstraints gbc = new GridBagConstraints();
      gbc.gridx = x;
      gbc.gridy = y;
      gbc.gridwidth = 1;
      gbc.gridheight = 1;

      gbc.anchor = (x == 0) ? GridBagConstraints.WEST : GridBagConstraints.EAST;
      gbc.fill = (x == 0) ? GridBagConstraints.BOTH
            : GridBagConstraints.HORIZONTAL;

      gbc.insets = (x == 0) ? WEST_INSETS : EAST_INSETS;
      gbc.weightx = (x == 0) ? 0.1 : 1.0;
      gbc.weighty = 1.0;
      return gbc;
   }

   public String getFieldText(FieldTitle fieldTitle) {
      return fieldMap.get(fieldTitle).getText();
   }

}

In this example, I display the JPanel in a JOptionPane, but it could just as easily be displayed in a JFrame or JApplet or JDialog or ...

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08-24 16:48
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