如何在面板的其余组件上绘制停靠的 JToolBar

Question

有没有办法在现有面板的其余组件上绘制停靠的 JToolBar？

基本上我希望在停靠工具栏时（从浮动位置）不干扰我的其他组件和现有布局。

简单的例子，只是为了入门..

public class ToolBarSample {

 public static void main(final String args[]) {
    JFrame frame = new JFrame("JToolBar Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JToolBar toolbar = new JToolBar();

    toolbar.add(new JButton("button"));
    toolbar.add(new JButton("button 2"));

    Container contentPane = frame.getContentPane();
    contentPane.add(toolbar, BorderLayout.NORTH);
    contentPane.add(new JLabel("I want this to be under the toolbar"), BorderLayout.CENTER);

    // set the toolbar floating
    ((BasicToolBarUI) toolbar.getUI()).setFloatingLocation(10, 10);
    ((BasicToolBarUI) toolbar.getUI()).setFloating(true, null);

    // TODO - after application starts, manually dock the toolbar to any position (north/east...)

    frame.setSize(250, 100);
    frame.setVisible(true);
 }
}

Answer 1

您可以将工具栏直接添加到 JFrame 的 JLayeredPane。

这里有一些有用的文档：How to Use Layered Panes

public static void main(final String args[]) {
    JFrame frame = new JFrame("JToolBar Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JToolBar toolbar = new JToolBar();

    toolbar.add(new JButton("button"));
    toolbar.add(new JButton("button 2"));

    Container contentPane = frame.getContentPane();
    //contentPane.add(toolbar, BorderLayout.NORTH);
    contentPane.add(new JLabel("I want this to be under the toolbar"), BorderLayout.CENTER);

    JLayeredPane layeredPane = frame.getLayeredPane();
    layeredPane.setLayout(new BorderLayout());
    layeredPane.add(toolbar, BorderLayout.NORTH);

    // set the toolbar floating
    ((BasicToolBarUI) toolbar.getUI()).setFloatingLocation(10, 10);
    ((BasicToolBarUI) toolbar.getUI()).setFloating(true, null);

    // TODO - after application starts, manually dock the toolbar to any position (north/east...)

    frame.setSize(250, 100);
    frame.setVisible(true);
}

如何在面板的其余组件上绘制停靠的 JToolBar

How to paint a docked JToolBar over the rest of the components from the panel

java

swing

jtoolbar