删除秋千中的复选框 [英] Delete checkboxes in swings
问题描述
我正在做一个与秋千相关的项目，因此我遇到一个问题，例如此if i delete two non immediate check boxes (or) single check box i am able to delete but if i delete two immediate check boxes i am not able to delete i.e中有一些5个复选框，如果我删除，则有1,2,3,4,5这样的复选框1和3、1和4或3和5等...(或1,2,3等).如果我使用此组合删除，则可以删除，但如果我删除1和2或2和3或
4和5就像即时复选框一样，我无法删除，我是新来的摇摆人，我不知道发生了什么事以及在哪里发生了什么.当我寻找答案时，我找到了此链接
删除复选框
i am doing one project related to swings in this i am facing one problem like some 5 check boxes are there in this if i delete two non immediate check boxes (or) single check box i am able to delete but if i delete two immediate check boxes i am not able to delete i.e i have check boxes like 1,2,3,4,5 if i delete 1 and 3 , 1 and 4 , or 3 and 5 etc... (or) 1,2,3 etc.. if i delete using this combination i am able to delete but if i delete 1 and 2 or 2 and 3 or
4 and 5 like immediate check boxes i am not able to delete i am new to swings i don't no what's happening wrong and where. when i am searching for the answer i found this link
Deleting check boxes
同一程序我使用的是不同的方法，在这里我在程序中创建自己的自定义类:
The same program i am using the different approach, Here i am creating my own custom classes here my program:
import java.awt.*;
import java.util.*;
import javax.swing.*;
@SuppressWarnings("serial")
public class ListModels extends JDialog {
@SuppressWarnings("rawtypes")
private JList list;
private JPanel rightPanel;
JButton cancel = new JButton("Cancel");
JButton delbtn = new JButton("Delete");
public ListModels() {
createList();
createButtons();
initUI();
}
public ListModels(List<String> values) {
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private void createList() {
myModel mModel = new myModel(new CheckListItem[] {
new CheckListItem("78"), new CheckListItem("79"),
new CheckListItem("80"), new CheckListItem("81"),
new CheckListItem("82") });
list = new JList(mModel);
list.setCellRenderer(new CheckListRenderer());
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent event) {
JList list = (JList) event.getSource();
// Get index of item clicked
int index = list.locationToIndex(event.getPoint());
CheckListItem item = (CheckListItem) list.getModel()
.getElementAt(index);
if (item.isSelected) {
System.out.println("i am selected ");
}
// Toggle selected state
item.setSelected(!item.isSelected());
// Repaint cell
list.repaint(list.getCellBounds(index, index));
}
});
}
private void createButtons() {
rightPanel = new JPanel();
// JButton cancel = new JButton("Cancel");
cancel.setMaximumSize(cancel.getMaximumSize());
// JButton delbtn = new JButton("Delete");
delbtn.setMaximumSize(cancel.getMaximumSize());
// Cancel button
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
System.exit(0);
}
});
// Cancel
delbtn.addActionListener(new ActionListener() {
@SuppressWarnings("rawtypes")
public void actionPerformed(ActionEvent event) {
// CheckListItem item = (CheckListItem)
// list.getModel().getElementAt(index);
int dialogButton = JOptionPane.YES_NO_OPTION;
int dialogResult = JOptionPane.showConfirmDialog(null,
"Are you sure you want to delete the selected map",
"Delete", dialogButton);
myModel mModel = (myModel) list.getModel();
ListModel currentModel = list.getModel();
for (int i = 0; i < mModel.getSize(); i++) {
CheckListItem item = (CheckListItem) mModel.getElementAt(i);
if(!item.isSelected)
{
System.out.println("i am in not selected item "+item);
}
else if (item.isSelected()) {
System.out.println("i am selected item "+item);
if (dialogResult == JOptionPane.YES_OPTION) {
// Location loc=(Location) mModel.getElementAt(i);
mModel.removeAt(i);
mModel.fireIntervalRemoved(this, i,mModel.getSize());
}
}
}
}
});
// JPanel buttonPane = new JPanel();
rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.LINE_AXIS));
rightPanel.setBorder(BorderFactory.createEmptyBorder(0, 4, 4, 4));
rightPanel.add(Box.createHorizontalStrut(60));
rightPanel.add(delbtn);
rightPanel.add(Box.createRigidArea(new Dimension(10, 0)));
rightPanel.add(cancel);
}
private void initUI() {
// JScroll Panel
JScrollPane listScroller = new JScrollPane(list);
listScroller.setPreferredSize(new Dimension(250, 80));
listScroller.setAlignmentX(LEFT_ALIGNMENT);
// Lay out the label and scroll pane from top to bottom.
JPanel listPane = new JPanel();
listPane.setLayout(new BoxLayout(listPane, BoxLayout.PAGE_AXIS));
// Add all to the panel
listPane.add(Box.createRigidArea(new Dimension(0, 5)));
listPane.add(listScroller);
listPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
// Lay out the buttons from left to right.
JPanel buttonPane = new JPanel();
buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
buttonPane.add(Box.createHorizontalStrut(60));
buttonPane.add(delbtn);
buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));
buttonPane.add(cancel);
listPane.add(buttonPane);
// Put everything together, using the content pane's BorderLayout.
Container contentPane = getContentPane();
contentPane.add(listPane, BorderLayout.CENTER);
contentPane.add(buttonPane, BorderLayout.PAGE_END);
add(listPane);
add(listPane);
setTitle("Delete Map");
setSize(300, 250);
setLocationRelativeTo(null);
}
class CheckListItem {
private String label;
private boolean isSelected = false;
public CheckListItem(String label) {
this.label = label;
}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean isSelected) {
this.isSelected = isSelected;
}
public String toString() {
return label;
}
}
@SuppressWarnings({ "rawtypes" })
class CheckListRenderer extends JCheckBox implements ListCellRenderer {
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean hasFocus) {
setEnabled(list.isEnabled());
setSelected(((CheckListItem) value).isSelected());
setFont(list.getFont());
setBackground(list.getBackground());
setForeground(list.getForeground());
setText(value.toString());
return this;
}
}
class myModel extends AbstractListModel<CheckListItem> {
private List<CheckListItem> items;
public myModel(CheckListItem[] items) {
super();
this.items = new ArrayList<ListModels.CheckListItem>();
for (CheckListItem item : items) {
this.items.add(item);
}
}
/*
* @Override protected void fireContentsChanged(Object Source, int
* index0, int index1) { super.fireContentsChanged(Source, index0,
* index1); }
*/
@Override
public CheckListItem getElementAt(int index) {
return items.get(index);
}
@Override
protected void fireIntervalRemoved(Object Source, int index0, int index1) {
// TODO Auto-generated method stub
super.fireIntervalRemoved(Source, index0, index1);
}
@Override
public int getSize() {
return items.size();
}
public void removeAt(int item) {
items.remove(item);
}
public void addAt(int index, CheckListItem item) {
items.set(index, item);
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
List<String> values = new ArrayList<String>();
values.addAll(newList);
ListModels ex = new ListModels();
ex.setVisible(true);
}
});
}
}
最后，在此程序中，我通过直接提供数字的自定义类加载了复选框，我想从我的main方法中调用该类，然后将数字通过Array列表或数组传递.任何帮助都表示欢迎和感谢.
Finally in this program i am loading the check boxes through my custom class directly giving numbers ,I want to call this class from my main method and pass the numbers through Array list or array. Any HELP IS WELCOME and THANKS.
推荐答案
for (int i = 0; i < mModel.getSize(); i++)
您需要从列表的末尾开始并向后工作:
You need to start at the end of the list and work backwards:
for (int i = mModel.getSize() - 1; i >=0; i--)
因为如果您从0开始，则删除该行后，所有行都将向下移动一位.
because if you start at 0, all the rows will shift down by one when the row is removed.
这篇关于删除秋千中的复选框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
