Java 在JComboBox中选择所有JCheckBox
我在JComboBox代码中有JCheckBox:Java 在JComboBox中选择所有JCheckBox,java,swing,jcheckbox,Java,Swing,Jcheckbox,我在JComboBox代码中有JCheckBox: 当您选择所有您已选择的内容时,当您取消选择所有您已取消选择的内容时,如何在“全选”和“取消”检查假后选中所有框。试着玩一下 public class CheckCombo implements ActionListener { JComboBox combo = null; public void actionPerformed(ActionEvent e) { JComboBox cb = (JCombo
当您选择所有您已选择的内容时,当您取消选择所有您已取消选择的内容时,如何在“全选”和“取消”检查假后选中所有框。试着玩一下
public class CheckCombo implements ActionListener {
JComboBox combo = null;
public void actionPerformed(ActionEvent e) {
JComboBox cb = (JComboBox) e.getSource();
CheckComboStore store = (CheckComboStore) cb.getSelectedItem();
CheckComboRenderer ccr = (CheckComboRenderer) cb.getRenderer();
ccr.checkBox.setSelected((store.state = !store.state));
if (store.id.equals("ALL")){
for (int i = 0; i < combo.getItemCount(); i++){
((CheckComboStore)combo.getItemAt(i)).state = ccr.checkBox.isSelected();
}
}
}
private JPanel getContent() {
String[] ids = { "north", "west", "south", "east", "ALL" };
Boolean[] values = { Boolean.TRUE, Boolean.FALSE, Boolean.FALSE, Boolean.FALSE, Boolean.FALSE };
CheckComboStore[] stores = new CheckComboStore[ids.length];
for (int j = 0; j < ids.length; j++)
stores[j] = new CheckComboStore(ids[j], values[j]);
combo = new JComboBox(stores);
combo.setRenderer(new CheckComboRenderer());
combo.addActionListener(this);
JPanel panel = new JPanel();
panel.add(combo);
return panel;
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new CheckCombo().getContent());
f.setSize(300, 160);
f.setLocation(200, 200);
f.setVisible(true);
}
}
/** adapted from comment section of ListCellRenderer api */
class CheckComboRenderer implements ListCellRenderer {
JCheckBox checkBox;
public CheckComboRenderer() {
checkBox = new JCheckBox();
}
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
CheckComboStore store = (CheckComboStore) value;
checkBox.setText(store.id);
checkBox.setSelected(((Boolean) store.state).booleanValue());
checkBox.setBackground(isSelected ? Color.red : Color.white);
checkBox.setForeground(isSelected ? Color.white : Color.black);
return checkBox;
}
}
class CheckComboStore {
String id;
Boolean state;
public CheckComboStore(String id, Boolean state) {
this.id = id;
this.state = state;
}
}
对不起,我不知道你在问什么?嗨,我想在点击所有jcheckbox后设置所有选中的项目北、西、南、东。,
public class CheckCombo implements ActionListener {
JComboBox combo = null;
public void actionPerformed(ActionEvent e) {
JComboBox cb = (JComboBox) e.getSource();
CheckComboStore store = (CheckComboStore) cb.getSelectedItem();
CheckComboRenderer ccr = (CheckComboRenderer) cb.getRenderer();
ccr.checkBox.setSelected((store.state = !store.state));
if (store.id.equals("ALL")){
for (int i = 0; i < combo.getItemCount(); i++){
((CheckComboStore)combo.getItemAt(i)).state = ccr.checkBox.isSelected();
}
}
}
private JPanel getContent() {
String[] ids = { "north", "west", "south", "east", "ALL" };
Boolean[] values = { Boolean.TRUE, Boolean.FALSE, Boolean.FALSE, Boolean.FALSE, Boolean.FALSE };
CheckComboStore[] stores = new CheckComboStore[ids.length];
for (int j = 0; j < ids.length; j++)
stores[j] = new CheckComboStore(ids[j], values[j]);
combo = new JComboBox(stores);
combo.setRenderer(new CheckComboRenderer());
combo.addActionListener(this);
JPanel panel = new JPanel();
panel.add(combo);
return panel;
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new CheckCombo().getContent());
f.setSize(300, 160);
f.setLocation(200, 200);
f.setVisible(true);
}
}
/** adapted from comment section of ListCellRenderer api */
class CheckComboRenderer implements ListCellRenderer {
JCheckBox checkBox;
public CheckComboRenderer() {
checkBox = new JCheckBox();
}
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
CheckComboStore store = (CheckComboStore) value;
checkBox.setText(store.id);
checkBox.setSelected(((Boolean) store.state).booleanValue());
checkBox.setBackground(isSelected ? Color.red : Color.white);
checkBox.setForeground(isSelected ? Color.white : Color.black);
return checkBox;
}
}
class CheckComboStore {
String id;
Boolean state;
public CheckComboStore(String id, Boolean state) {
this.id = id;
this.state = state;
}
}