更改JComboBox中滚动条的大小 [英] Change the size of a scrollbar in JComboBox
本文介绍了更改JComboBox中滚动条的大小的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有人知道如何手动更改jComboBox中的滚动条大小吗?我已经尝试了很多东西,但没有任何效果.
Does anybody know how to change the scrollbar size in jComboBox manually? I've tried a whole bunch of stuff and nothing works.
推荐答案
好,我知道了.您可以实现PopUpMenuListener并使用它:
Ok, I figured this out. You can implement PopUpMenuListener and use this:
public void popupMenuWillBecomeVisible(PopupMenuEvent e)
{
JComboBox comboBox = (JComboBox) e.getSource();
Object popup = comboBox.getUI().getAccessibleChild(comboBox, 0);
Component c = ((Container) popup).getComponent(0);
if (c instanceof JScrollPane)
{
JScrollPane scrollpane = (JScrollPane) c;
JScrollBar scrollBar = scrollpane.getVerticalScrollBar();
Dimension scrollBarDim = new Dimension(SCROLLBAR_WIDTH, scrollBar
.getPreferredSize().height);
scrollBar.setPreferredSize(scrollBarDim);
}
}
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