[英]JComboBox on a JPopupMenu
I'm trying to use a compound Swing component as part of a Menu.我正在尝试使用复合 Swing 组件作为菜单的一部分。
Everything works just fine, apart from one detail: The component contains JComboBox
es and whenever the user clicks on one of them to open its dropdown, the dropdown opens but the menu disappears.一切正常,除了一个细节:该组件包含JComboBox
es,每当用户单击其中一个以打开其下拉菜单时,下拉菜单就会打开,但菜单会消失。 Is it possible to make the menu stay open when a JComboBox
is clicked?单击JComboBox
时是否可以使菜单保持打开状态?
I sub-classed JMenu
.我对JMenu
进行了分类。 This is the corresponding code:这是对应的代码:
public class FilterMenu extends JMenu {
public FilterMenu(String name) {
super(name);
final JPopupMenu pm = this.getPopupMenu();
final FilterPanel filterPanel = new FilterPanel(pm) {
@Override
public void updateTree() {
super.updateTree();
pm.pack();
}
};
pm.add(filterPanel);
}
}
FilterPanel
is the custom compound component. FilterPanel
是自定义的复合组件。 The pm.pack()
is called to adapt the size of the JPopupMenu
when the filterPanel
changes in size.当filterPanel
的大小发生变化时,调用pm.pack()
来调整JPopupMenu
的大小。
Thanks for your help谢谢你的帮助
are you meaning this bug你是说这个bug吗
import javax.swing.*;
import java.awt.event.*;
public class Test {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(400, 400);
frame.setVisible(true);
String[] list = {"1", "2", "3", "4",};
JComboBox comb = new JComboBox(list);
final JPopupMenu pop = new JPopupMenu();
pop.add(comb);
frame.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
System.out.println("mousePressed");
pop.show(e.getComponent(), e.getX(), e.getY());
}
});
}
}
Look at Jide OSS' PopupWindow .看看 Jide OSS 的PopupWindow 。 This provides an easy-to-use solution for this problem.这为这个问题提供了一个易于使用的解决方案。 Works fine for me.对我来说很好。
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