在java JFace对话框中禁用关闭按钮?

Pla*_*mer 3 java user-interface swt jface

如何在java JFace对话框中禁用关闭按钮(如果可能,使其完全消失)?

jas*_*ram 12

使用createButton()方法创建Dialog中的按钮.要"过滤"取消按钮,您可以按如下方式覆盖它:

protected Button createButton(Composite parent, int id,
        String label, boolean defaultButton) {
    if (id == IDialogConstants.CANCEL_ID) return null;
    return super.createButton(parent, id, label, defaultButton);
}
Run Code Online (Sandbox Code Playgroud)

但是,Dialog的关闭按钮(由操作系统提供)仍然有效.要禁用它,您可以覆盖canHandleShellCloseEvent():

protected boolean canHandleShellCloseEvent() {
    return false;
}
Run Code Online (Sandbox Code Playgroud)

这是一个完整的,最小的例子:

package stackoverflow;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.InputDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class JFaceDialogNoCloseButton {
    private static final Display DISPLAY = Display.getDefault();

    public static void main(String[] args) {
        Shell shell = new Shell(DISPLAY, SWT.CLOSE | SWT.RESIZE);
        shell.setSize(200, 100);
        shell.setLayout(new FillLayout());

        final Dialog dialog = new InputDialog(shell, "Title", "Message",
                "initial value", null) {
            @Override
            protected Button createButton(Composite parent, int id,
                    String label, boolean defaultButton) {
                if (id == IDialogConstants.CANCEL_ID)
                    return null;
                return super.createButton(parent, id, label, defaultButton);
            }

            @Override
            protected boolean canHandleShellCloseEvent() {
                return false;
            }
        };

        Button button = new Button(shell, SWT.PUSH);
        button.setText("Launch JFace Dialog");
        button.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                dialog.open();
            }
        });

        shell.open();

        while (!shell.isDisposed()) {
            if (!DISPLAY.readAndDispatch()) {
                DISPLAY.sleep();
            }
        }
        DISPLAY.dispose();
    }
}
Run Code Online (Sandbox Code Playgroud)


Gre*_*ver 9

要使对话框上的X按钮不可见,您必须关闭SWT.CLOSE样式属性.需要注意的是,必须在打开对话框之前完成此操作,因此在对话框的构造函数中可以正常工作.

public NoCloseDialog(...){
    super(...);
    setShellStyle(getShellStyle() & ~SWT.CLOSE);
}
Run Code Online (Sandbox Code Playgroud)

JFace窗口上的默认shell样式SWT.SHELL_TRIM等于SWT.CLOSE | SWT.TITLE | SWT.MIN | SWT.MAX | SWT.RESIZE


the*_*man 8

请参阅此处以获取显示如何隐藏关闭按钮的示例Dialog.您只需覆盖以下方法:

protected void setShellStyle(int arg0){
    //Use the following not to show the default close X button in the title bar
    super.setShellStyle(SWT.TITLE);
}
Run Code Online (Sandbox Code Playgroud)

否则覆盖close()并返回false以防止关闭.

更新:虽然上面的代码"解决"了手头的问题,但它没有解释很多,并引入了一个令人讨厌的错误.请参阅Goog的答案,以获得更好的版本.