如何更改JComboBox弹出部分的边框? [英] How do you change border of the pop up section of a JComboBox?
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问题描述
我不想改变JComboBox的弹出/选择部分的边框。
I wan't to change the border of the popup/selection part of the JComboBox.
注意UI是BasicComboBoxUI
Note that the UI is BasicComboBoxUI
我试过:
weaponCB.setRenderer(new DefaultListCellRenderer() {
@Override
public void paint(Graphics g) {
setBorder(whiteBorder)
//whiteBorder is a white border
super.paint(g);
}
});
但它给了我这个:
but it gave me this:
和:
for (int i=0; i<weaponCB.getComponentCount(); i++)
{
if (weaponCB.getComponent(i) instanceof AbstractButton)
{
((AbstractButton)weaponCB.getComponent(i)).setBorder(whiteBorder);
}
}
但它给了我这个:
我想要的是这样的: (它是在photoshop中完成的)
我不介意它是不是完全没有同样,我只是不相似。
what i wan't is something like this: (it was done in photoshop) I don't mind if it's not exactly the same, I just wan't it similar.
有没有人对如何做到这一点有任何想法?
does anyone have any ideas on how to do this?
推荐答案
这样的工作原理:
Object child = comboBox.getAccessibleContext().getAccessibleChild(0);
BasicComboPopup popup = (BasicComboPopup)child;
JList list = popup.getList();
list.setBorder( whiteBorder );
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