[英]How to read Checkboxes status in Jlist
I am developing a GUI where I have included some Checkboxes into a Jlist but I cannot read their status. 我正在开发一个GUI,其中已将一些复选框包含到Jlist中,但无法读取其状态。 Below i have an example of my code
下面我有我的代码的示例
final JScrollPane scrollPaneWat = new JScrollPane();
scrollPaneWat.setBounds(526, 248, 152, 140);
Pane.add(scrollPaneWat);
scrollPaneWat.hide();
@SuppressWarnings("unchecked")
final JList<?> list = new JList(new CheckListRendererClasses[] {
new CheckListRendererClasses("a"),
new CheckListRendererClasses("b"),
new CheckListRendererClasses("c"),
new CheckListRendererClasses("d"),
new CheckListRendererClasses("e"),
new CheckListRendererClasses("f"),
new CheckListRendererClasses("g"),
scrollPaneWat.setViewportView(list);
list.setBackground(Color.LIGHT_GRAY);
list.setFont(new Font("Times New Roman", Font.ITALIC, 14));
list.setCellRenderer(new CheckListRenderer());
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent event){
JList list = (JList) event.getSource();
int index = list.locationToIndex(event.getPoint());
CheckListRendererClasses item = (CheckListRendererClasses)
list.getModel().getElementAt(index);
item.setSelected(! item.isSelected());
list.repaint(list.getCellBounds(index, index));
}
});
I have tried this: 我已经试过了:
for (int i = 0; i < 7; i++) {
Object sel = list.getModel().getElementAt(i);
System.out.print(sel.toString());
}
and I get back a, b, c, d, e, f, g 然后我得到a,b,c,d,e,f,g
Also, when i tried this: 另外,当我尝试这样做:
System.out.println(list.isSelectedIndex(1));
if I tick the Checkbox a, it prints true. 如果我勾选Checkbox a,它会打印true。 But if the Checkbox a is ticked and I tick one more (so now I have ticked the Checkbox a and c) it returns false.
但是,如果Checkbox a被勾选,而我又勾选了一个(所以现在我勾选了Checkbox a和c),它将返回false。
It's like it keeps my last choice. 就像它是我的最后选择。
What I want is, for example if I have ticked the a, c, d Checkboxes to be able to make a for loop and see everytime if a checkbox at value i is ticked or not. 我想要的是例如是否勾选了a,c,d复选框,以便能够进行for循环,并每次查看是否勾选了值i的复选框。
Thank you 谢谢
将ListSelectionModel.SINGLE_SELECTION
更改为MULTIPLE_INTERVAL_SELECTION
以一次允许多个选择。
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