如何从任何 java gui 中删除窗口框

2022-01-24 00:00:00 desktop-application java swing jframe

如何从任何 java 程序中删除窗口框.因为我想让它看起来没有边界.我知道在 jre 上运行的任何 jar 文件都会自动获得这样的窗口.所以我想知道是否有解决方法.

How do i remove the window box from any java program. Because i want to make it look border-less. I know any jar files running on jre automatically gets a window like this. So i want to know if there is workaround about this.

提前致谢

这是我想要做的照片

推荐答案

参见Frame#setUndecorated

您也可以使用默认未装饰的 JWindow.

You could also use a JWindow which is undecorated by default.

检查 this 和 this 例如使用

Check this and this for example uses

更新

如果您移除边框，您将负责移动和调整窗口大小...

If you remove the border, you become responsible for moving and resizing of the window...

这个基本"示例演示了如何使用鼠标移动 JWindow.这会在窗口周围形成一个 10 像素宽的拖动区域".

This "basic" example demonstrates how to move a JWindow with the mouse. This makes a "drag zone" around window which is 10 pixels wide.

调整大小将是类似的过程，但您需要决定调整大小的方向(即在调整大小时可能需要您移动窗口；))

Resizing would be similar process, but you need to decide in which direction to resize (ie it might need you to move the window when it's resized ;))

import java.awt.Component;
import java.awt.Cursor;
import java.awt.EventQueue;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JWindow;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestMoveWindow {

    public static void main(String[] args) {
        new TestMoveWindow();
    }

    public TestMoveWindow() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JWindow window = new JWindow();
                window.setSize(200, 200);
                window.addWindowListener(new WindowAdapter() {
                    @Override
                    public void windowClosing(WindowEvent e) {
                        System.exit(0);
                    }

                });

                MouseAdapter mouseHandler = new MouseAdapter() {

                    private Point offset;

                    protected boolean isWithinBorder(MouseEvent e) {
                        Point p = e.getPoint();
                        Component comp = e.getComponent();
                        return p.x < 10 || p.y < 10 || p.x > comp.getWidth() - 10 || p.y > comp.getHeight()  - 10;
                    }

                    @Override
                    public void mouseMoved(MouseEvent e) {
                        Component comp = e.getComponent();
                        if (isWithinBorder(e)) {
                            System.out.println("Move");
                            comp.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
                        } else {
                            System.out.println("Default");
                            comp.setCursor(Cursor.getDefaultCursor());
                        }
                    }

                    @Override
                    public void mouseDragged(MouseEvent e) {
                        if (offset != null) {
                            Point pos = e.getLocationOnScreen();

                            int x = pos.x - offset.x;
                            int y = pos.y - offset.y;

                            System.out.println(x + "x" + y);

                            SwingUtilities.getWindowAncestor(e.getComponent()).setLocation(x, y);
                        }
                    }

                    @Override
                    public void mousePressed(MouseEvent e) {
                        if (isWithinBorder(e)) {
                            Point pos = e.getComponent().getLocationOnScreen();
                            offset = new Point(e.getLocationOnScreen());
                            offset.x -= pos.x;
                            offset.y -= pos.y;
                        }
                    }

                };

                window.getContentPane().addMouseListener(mouseHandler);
                window.getContentPane().addMouseMotionListener(mouseHandler);

                window.setLocationRelativeTo(null);
                window.setVisible(true);
            }
        });
    }
}

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