java - SWT: InputDialog 用于密码输入

Question

如何使用 SWTInputDialog对象输入密码，将普通字符替换为常用字符*？

还是不可能？

Answer 1

只需创建自己的Dialog：

public static void main(String[] args) {
    PasswordDialog dialog = new PasswordDialog(new Shell());
    dialog.open();

    System.out.println(dialog.getPassword());
}

public static class PasswordDialog extends Dialog {
    private Text passwordField;
    private String passwordString;

    public PasswordDialog(Shell parentShell) {
        super(parentShell);
    }

    @Override
    protected void configureShell(Shell newShell)
    {
        super.configureShell(newShell);
        newShell.setText("Please enter password");
    }

    @Override
    protected Control createDialogArea(Composite parent) {
        Composite comp = (Composite) super.createDialogArea(parent);

        GridLayout layout = (GridLayout) comp.getLayout();
        layout.numColumns = 2;

        Label passwordLabel = new Label(comp, SWT.RIGHT);
        passwordLabel.setText("Password: ");
        passwordField = new Text(comp, SWT.SINGLE | SWT.BORDER | SWT.PASSWORD);

        GridData data = new GridData(SWT.FILL, SWT.CENTER, true, false);
        passwordField.setLayoutData(data);

        return comp;
    }

    @Override
    protected void okPressed()
    {
        passwordString = passwordField.getText();
        super.okPressed();
    }

    @Override
    protected void cancelPressed()
    {
        passwordField.setText("");
        super.cancelPressed();
    }

    public String getPassword()
    {
        return passwordString;
    }
}

结果如下所示：

Answer 2

您可以继承 InputDialog 并覆盖用于文本控件的样式。

public class PasswordDialog extends InputDialog {

    public PasswordDialog(Shell parentShell, String dialogTitle, String dialogMessage, String initialValue, IInputValidator validator) {
        super(parentShell, dialogTitle, dialogMessage, initialValue, validator);
    }

    @Override
    protected int getInputTextStyle() {
        return super.getInputTextStyle() | SWT.PASSWORD;
    }
}