Gridbaglayout问题
我正在设计一个面板并在OptionPane Confirm Dialog中使用此面板，如下所示：
JOptionPane.showConfirmDialog(null, slaveGroupPanel, messages.getString("centrum.manageGroups"), JOptionPane.OK_CANCEL_OPTION);
我的网格限制是这样的：
addGroupButton.setText(messages.getString("centrum.slavegroup.add"));
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 6;
gridBagConstraints.gridy = 0;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
add(addGroupButton, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 1;
gridBagConstraints.gridy = 0;
gridBagConstraints.gridwidth = 5;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.weightx = 1.0;
add(addGroupTextField, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
gridBagConstraints.gridwidth = 1;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
add(groupNameLabel, gridBagConstraints);
groupComboBox.setModel(new DefaultComboBoxModel(slaveGroupHash.keySet().toArray() ));
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 1;
gridBagConstraints.gridwidth = 5;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
gridBagConstraints.weightx = 1;
add(groupComboBox, gridBagConstraints);
allSlavesList.setModel(new DefaultListModel());
for (int i = 0; i < allSlaves.length; i++) {
((DefaultListModel)allSlavesList.getModel()).addElement(allSlaves[i]);
}
allSlavesList.setVisibleRowCount(4);
jScrollPane2.setViewportView(allSlavesList);
jScrollPane2.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 3;
gridBagConstraints.gridwidth = 3;
gridBagConstraints.gridheight = 2;
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 0.45;
gridBagConstraints.weighty = 1.0;
add(jScrollPane2, gridBagConstraints);
slavesInGroupList.setModel(new DefaultListModel());
slavesInGroupList.setVisibleRowCount(4);
jScrollPane3.setViewportView(slavesInGroupList);
jScrollPane3.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 4;
gridBagConstraints.gridy = 3;
gridBagConstraints.gridwidth = 3;
gridBagConstraints.gridheight = 2;
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 0.45;
gridBagConstraints.weighty = 1.0;
add(jScrollPane3, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 2;
gridBagConstraints.fill = GridBagConstraints.HORIZONTAL;
add(allSlavesLabel, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 4;
gridBagConstraints.gridy = 2;
gridBagConstraints.fill = GridBagConstraints.HORIZONTAL;
add(slavesInGroupLabel, gridBagConstraints);
addSlaveButton.setIcon(GeneralObjects.getrightIcon());
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 3;
gridBagConstraints.gridy = 3;
gridBagConstraints.weightx = 0.1;
gridBagConstraints.weighty = 1.0;
add(addSlaveButton, gridBagConstraints);
deleteSlaveButton.setIcon(GeneralObjects.getleftIcon());
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 3;
gridBagConstraints.gridy = 4;
gridBagConstraints.weightx = 0.1;
gridBagConstraints.weighty = 1.0;
add(deleteSlaveButton, gridBagConstraints);
renameButton.setText(messages.getString("centrum.slavegroup.rename"));
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 6;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
add(renameButton, gridBagConstraints);
deleteButton.setText(messages.getString("centrum.slavegroup.delete"));
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 5;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
add(deleteButton, gridBagConstraints);
但正如您在附带的屏幕截图中看到的那样，文本字段和添加按钮之间存在两个间隙。删除和重命名按钮之间也会出现这种差距。但是我不想要那些差距。我没有定义任何插图，我的文本字段都是weightx = 1;和fill = java.awt.GridBagConstraints.HORIZONTAL;的组合框所以我希望它们尽可能地水平扩展而不会有间隙。但为什么会出现这些差距？
其次，您可以清楚地看到右侧的Jlist比左侧的Jlist宽。但是，我的两个JLists（实际上是包含JLists的ScrollPanes）都将gridwidth，weightx和fill参数设置为相同的值。所以我希望它们的大小相同。看起来我错过了一些东西。
下面添加了SSCCE：
import javax.swing.*;
import java.awt.*;
public class SSCCE {
private javax.swing.JButton addGroupButton;
private javax.swing.JTextField addGroupTextField;
private javax.swing.JButton addSlaveButton;
private javax.swing.JList allSlavesList;
private javax.swing.JButton deleteButton;
private javax.swing.JButton deleteSlaveButton;
private javax.swing.JComboBox groupComboBox;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JButton renameButton;
private javax.swing.JLabel groupNameLabel;
private javax.swing.JLabel allSlavesLabel;
private javax.swing.JLabel slavesInGroupLabel;
private javax.swing.JList slavesInGroupList;
public SSCCE() {
}
public JPanel createPanel(){
JPanel panel = new JPanel();
panel.setLayout(new java.awt.GridBagLayout());
addGroupButton=new javax.swing.JButton();
addGroupTextField=new javax.swing.JTextField();
addSlaveButton=new javax.swing.JButton();
allSlavesList=new javax.swing.JList();
deleteButton=new javax.swing.JButton();
deleteSlaveButton=new javax.swing.JButton();
groupComboBox=new javax.swing.JComboBox();
jScrollPane2=new javax.swing.JScrollPane();
jScrollPane3=new javax.swing.JScrollPane();
renameButton=new javax.swing.JButton();
groupNameLabel=new javax.swing.JLabel();
allSlavesLabel=new javax.swing.JLabel();
slavesInGroupLabel=new javax.swing.JLabel();
slavesInGroupList=new javax.swing.JList();
allSlavesList.setModel(new DefaultListModel());
slavesInGroupList.setModel(new DefaultListModel());
GridBagConstraints gridBagConstraints;
addGroupButton.setText("add");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 6;
gridBagConstraints.gridy = 0;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
panel.add(addGroupButton, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 1;
gridBagConstraints.gridy = 0;
gridBagConstraints.gridwidth = 5;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.weightx = 1.0;
panel.add(addGroupTextField, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
gridBagConstraints.gridwidth = 1;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
panel.add(groupNameLabel, gridBagConstraints);
groupComboBox.setModel(new DefaultComboBoxModel(new Object[]{"one","two","three"}));
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 1;
gridBagConstraints.gridwidth = 5;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
gridBagConstraints.weightx = 1;
panel.add(groupComboBox, gridBagConstraints);
allSlavesList.setVisibleRowCount(4);
jScrollPane2.setViewportView(allSlavesList);
jScrollPane2.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 3;
gridBagConstraints.gridwidth = 3;
gridBagConstraints.gridheight = 2;
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 0.45;
gridBagConstraints.weighty = 1.0;
panel.add(jScrollPane2, gridBagConstraints);
slavesInGroupList.setVisibleRowCount(4);
jScrollPane3.setViewportView(slavesInGroupList);
jScrollPane3.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 4;
gridBagConstraints.gridy = 3;
gridBagConstraints.gridwidth = 3;
gridBagConstraints.gridheight = 2;
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 0.45;
gridBagConstraints.weighty = 1.0;
panel.add(jScrollPane3, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 2;
gridBagConstraints.fill = GridBagConstraints.HORIZONTAL;
panel.add(allSlavesLabel, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 4;
gridBagConstraints.gridy = 2;
gridBagConstraints.fill = GridBagConstraints.HORIZONTAL;
panel.add(slavesInGroupLabel, gridBagConstraints);
//addSlaveButton.setIcon(GeneralObjects.getrightIcon());
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 3;
gridBagConstraints.gridy = 3;
gridBagConstraints.weightx = 0.1;
gridBagConstraints.weighty = 1.0;
panel.add(addSlaveButton, gridBagConstraints);
//deleteSlaveButton.setIcon(GeneralObjects.getleftIcon());
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 3;
gridBagConstraints.gridy = 4;
gridBagConstraints.weightx = 0.1;
gridBagConstraints.weighty = 1.0;
panel.add(deleteSlaveButton, gridBagConstraints);
renameButton.setText("rename");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 6;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
panel.add(renameButton, gridBagConstraints);
deleteButton.setText("delete");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 5;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
panel.add(deleteButton, gridBagConstraints);
((DefaultListModel)allSlavesList.getModel()).addElement("one");
((DefaultListModel)allSlavesList.getModel()).addElement("two");
((DefaultListModel)allSlavesList.getModel()).addElement("three");
((DefaultListModel)slavesInGroupList.getModel()).addElement("one");
((DefaultListModel)slavesInGroupList.getModel()).addElement("two");
((DefaultListModel)slavesInGroupList.getModel()).addElement("three");
panel.setPreferredSize(new Dimension(600,300));
return panel;
}
public static void main(String[] args){
SSCCE a = new SSCCE();
JOptionPane.showConfirmDialog(null, a.createPanel(), "centrum.manageGroups", JOptionPane.OK_CANCEL_OPTION);
}
}
1 个答案:
答案 0 :(得分：2)
您应该尝试使用更多的嵌套，因为您无法在平面布局中设置此类布局。
根据你的描述，我看到：
- 包含3行的根面板（使用
GridBagLayout进行设置，并为最后一行提供所有额外的垂直空间） - 第1行：您的标签，文字字段和按钮 - ＆gt;使用
BorderLayout - 第2行：组合框和2个按钮 - ＆gt;使用
GridBagLayout并为组合框提供所有额外空间 - 第3行：2个标签，2个列表和2个按钮 - ＆gt;使用
GridBagLayout进行设置
现在，GridBagLayout要理解的一点是，weightx/weighty不是它分配的宽度/高度的百分比，而是“额外”空间的分布情况。它将首先为每个组件提供其首选大小，然后，如果有任何额外空间，它将根据每个组件的重量分配该空间。
对于最后一行，每个“列”的宽度基于2个标签的首选大小（一个明显宽于另一个）和2个JList的首选大小（基于内容的JList）。
这是你的SSCCE的更新（虽然我不得不重做很多，因为代码有点乱：尝试按顺序做事，首先设置你的组件，然后按它们出现的顺序排列，阅读起来要简单得多。
import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListModel;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
public class SSCCE {
private javax.swing.JButton addGroupButton;
private javax.swing.JTextField addGroupTextField;
private javax.swing.JButton addSlaveButton;
private javax.swing.JList allSlavesList;
private javax.swing.JButton deleteButton;
private javax.swing.JButton deleteSlaveButton;
private javax.swing.JComboBox groupComboBox;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JButton renameButton;
private javax.swing.JLabel allSlavesLabel;
private javax.swing.JLabel slavesInGroupLabel;
private javax.swing.JList slavesInGroupList;
private JLabel groupNameLabel;
public SSCCE() {
}
public JPanel createPanel() {
JPanel panel = new JPanel();
panel.setLayout(new java.awt.GridBagLayout());
addGroupButton = new javax.swing.JButton();
addGroupTextField = new javax.swing.JTextField();
addSlaveButton = new javax.swing.JButton();
allSlavesList = new javax.swing.JList();
deleteButton = new javax.swing.JButton();
deleteSlaveButton = new javax.swing.JButton();
groupComboBox = new javax.swing.JComboBox();
jScrollPane2 = new javax.swing.JScrollPane();
jScrollPane3 = new javax.swing.JScrollPane();
renameButton = new javax.swing.JButton();
allSlavesLabel = new javax.swing.JLabel("All slaves");
slavesInGroupLabel = new javax.swing.JLabel("Devices in this group");
groupNameLabel = new JLabel("Groupd name:");
slavesInGroupList = new javax.swing.JList();
groupComboBox.setModel(new DefaultComboBoxModel(new Object[] { "one", "two", "three" }));
addGroupButton.setText("add");
allSlavesList.setModel(new DefaultListModel());
slavesInGroupList.setModel(new DefaultListModel());
renameButton.setText("rename");
deleteButton.setText("delete");
addSlaveButton.setText("->");
deleteSlaveButton.setText("<-");
allSlavesList.setVisibleRowCount(4);
jScrollPane2.setViewportView(allSlavesList);
jScrollPane2.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
((DefaultListModel) allSlavesList.getModel()).addElement("one");
((DefaultListModel) allSlavesList.getModel()).addElement("two");
((DefaultListModel) allSlavesList.getModel()).addElement("three");
((DefaultListModel) slavesInGroupList.getModel()).addElement("one");
((DefaultListModel) slavesInGroupList.getModel()).addElement("two");
((DefaultListModel) slavesInGroupList.getModel()).addElement("three");
slavesInGroupList.setVisibleRowCount(4);
jScrollPane3.setViewportView(slavesInGroupList);
jScrollPane3.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
// Let's split your display in 3 rows
panel = new JPanel(new GridBagLayout());
JPanel row1 = new JPanel(new BorderLayout(3, 3));
JPanel row2 = new JPanel(new GridBagLayout());
JPanel row3 = new JPanel(new GridBagLayout());
// Use GBL to make three rows and give all extra vertical space to the last one
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1.0;
gbc.fill = GridBagConstraints.BOTH;
gbc.insets = new Insets(3, 3, 3, 3);
panel.add(row1, gbc);
panel.add(row2, gbc);
// Gives all extra v-space to last row
gbc.weighty = 1.0;
panel.add(row3, gbc);
GridBagConstraints gridBagConstraints;
// Set up row 1
row1.add(groupNameLabel, BorderLayout.WEST);
row1.add(addGroupButton, BorderLayout.EAST);
row1.add(addGroupTextField);// In the middle so that it takes all the width and it won't stretch vertically because row1 has weighty
// set to 0.0
// Set up row 2
// We give all extra space to the combo box
gbc = new java.awt.GridBagConstraints();
gbc.insets = new Insets(3, 3, 3, 3);
gbc.fill = java.awt.GridBagConstraints.HORIZONTAL;
gbc.weightx = 1;
row2.add(groupComboBox, gbc);
gbc.weightx = 0;
row2.add(deleteButton, gbc);
row2.add(renameButton, gbc);
// Set up row3
gbc = new java.awt.GridBagConstraints();
gbc.insets = new Insets(3, 3, 3, 3);
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1.0;
gbc.anchor = GridBagConstraints.WEST;
row3.add(allSlavesLabel, gbc);
gbc.gridx = 2;
row3.add(slavesInGroupLabel, gbc);
gbc.weighty = 1.0;
gbc.weightx = 1.0;
gbc.gridheight = 2;
gbc.gridx = 0;
gbc.gridy = 1;
gbc.fill = GridBagConstraints.BOTH;
row3.add(jScrollPane2, gbc);
gbc.fill = GridBagConstraints.NONE;
gbc.anchor = GridBagConstraints.CENTER;
gbc.gridheight = 1;
gbc.gridx = 1;
gbc.weightx = 0;
row3.add(addSlaveButton, gbc);
gbc.gridy = 2;
row3.add(deleteSlaveButton, gbc);
gbc.gridheight = 2;
gbc.gridx = 2;
gbc.gridy = 1;
gbc.fill = GridBagConstraints.BOTH;
row3.add(jScrollPane3, gbc);
return panel;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
SSCCE a = new SSCCE();
JDialog dialog = new JDialog();
dialog.add(a.createPanel());
dialog.pack();
dialog.setLocationRelativeTo(null);
dialog.setVisible(true);
// JOptionPane.showConfirmDialog(null, a.createPanel(), "centrum.manageGroups", JOptionPane.OK_CANCEL_OPTION);
}
});
}
}
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