我对 Java Swing/AWT 等人相当陌生,因此是这个问题。我有一个带有一些文本和几个 JButton 的简单对话框。我正在为这个对话框使用 GridbagLayout。
但是当我查看对话框时,JButton 的形状有点奇怪,我似乎也无法正确证明文本。
这是我正在使用的布局的限制吗?对于按钮或文本布局的问题,是否有更简单和优雅的解决方案?
下面附上了对话框的屏幕截图。
我的对话框类的代码是:
public class UpgradePopupWindow extends JPanel implements ActionListener {
static final long serialVersionUID = 0;
final String upgrade = " Continue Upgrade ";
final String restore = "Restore Previous Version";
JPanel panels;
JButton upgradeButton;
JButton restoreButton;
JTextArea Message;
JFrame newFrame;
FlasherThread flash;
protected JTextArea addText(String text, boolean visible, int fontStyle) {
JTextArea textArea = new JTextArea(text);
textArea.setFont(new Font("SansSerif", fontStyle, 12)); //$NON-NLS-1$
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
textArea.setEditable(false);
textArea.setBackground(Color.DARK_GRAY);
textArea.setForeground(Color.WHITE);
textArea.setOpaque(false);
textArea.setVisible(visible);
textArea.setAlignmentX(Component.CENTER_ALIGNMENT);
add(textArea);
return textArea;
}
protected JTextArea addMultiLineLabel(String text, int fontStyle, int fontSize, Object constraints) {
JTextArea textArea = new JTextArea(text);
textArea.setFont(new Font("SansSerif", fontStyle, fontSize));
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
textArea.setEditable(false);
textArea.setBackground(new Color(0, 0, 0, 0)); // Zero alpha = transparent background
textArea.setOpaque(false);
textArea.setBorder(new TitledBorder(""));
textArea.setAlignmentX(Component.CENTER_ALIGNMENT);
add(textArea, constraints);
return textArea;
}
private UpgradePopupWindow(JFrame frame, Object ft) {
super(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
flash = (FlasherThread)ft;
String text = "An error occurred during the attempt to update your device's software. We recommend the following: (1) Restore your device to its previous version, (2) back up important data, and then (3) try updating your device again. If you continue with the current update, only your previously backed-up data will be available.";
//addFiller(5);
//addLabel(text, Font.PLAIN, 12);
gbc.gridy = 0;
gbc.gridx = 0;
gbc.gridwidth = 2;
gbc.weightx = 1.0;
gbc.fill = GridBagConstraints.HORIZONTAL;
addMultiLineLabel(text, Font.PLAIN, 12, gbc);
//addText(text, true, Font.PLAIN);
addFiller(20);
newFrame = frame;
gbc.gridy = 1;
gbc.gridwidth = 1;
gbc.fill = GridBagConstraints.NONE;
upgradeButton = new JButton(upgrade);
upgradeButton.setActionCommand("upgrade");
upgradeButton.addActionListener(this);
upgradeButton.setEnabled(true);
upgradeButton.setBackground(Color.WHITE);
upgradeButton.setForeground(Color.GRAY);
add(upgradeButton,gbc);
++ gbc.gridx;
restoreButton = new JButton(restore);
restoreButton.setActionCommand("restore");
restoreButton.addActionListener(this);
restoreButton.setEnabled(true);
//restoreButton.setForeground(Color.DARK_GRAY);
restoreButton.setBackground(Color.DARK_GRAY);
add(restoreButton,gbc);
setOpaque(true);
newFrame.setContentPane(this);
//newFrame.getContentPane().setBackground(Color.LIGHT_GRAY);
}
protected void addFiller(int size) {
Dimension diminsion = new Dimension(size, size);
Filler filler = new Filler(diminsion, diminsion, diminsion);
filler.setAlignmentX(Component.CENTER_ALIGNMENT);
add(filler);
}
public static void createGUI(Object obj) {
//Create and set up the frame.
JFrame frame = new JFrame("PopUp Dialog");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setPreferredSize(new Dimension(440, 180));
//create and setup the content pane
UpgradePopupWindow popUpContentPane = new UpgradePopupWindow(frame, obj);
popUpContentPane.setOpaque(true);
frame.setContentPane(popUpContentPane);
frame.pack();
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
if("restore".equals(e.getActionCommand())) {
System.out.println("restore button selected");
flash.setUpgradeRestoreChoice("restore");
newFrame.dispose();
} else if ("upgrade".equals(e.getActionCommand())) {
System.out.println("upgrade button selected");
flash.setUpgradeRestoreChoice("upgrade");
newFrame.dispose();
}
}
}
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