¿Cómo eliminar dinámicamente un JPanel?
Tengo una GUI que se ve a continuación.
Quiero agregar / eliminar dinámicamente un panel. yo sueloArrayList para mantener un rastro deJPanel objetos. Y ahora podría agregar el panel dinámicamente, pero cuando quiero eliminar un panel, no puedo obtener su atributo, por lo que no puedo eliminarlo.
Aquí está mi código:
public class Main implements ActionListener{
private List <myPanel> mpList;
private JPanel btnPanel;
private JButton jbtAdd,jbtDelete;
private JFrame jf;
private JPanel jp;
private JScrollPane js;
private myPanel mp;
private static int size=0;
private int selectedId=-1;
//private
public Main(){
mpList=new ArrayList<myPanel>();
btnPanel=new JPanel();
jbtAdd=new JButton("addJpanel");
jbtDelete=new JButton("delJpanel");
btnPanel.setLayout(new FlowLayout(FlowLayout.LEFT,1,1));
btnPanel.add(jbtAdd);
btnPanel.add(jbtDelete);
jf=new JFrame("hello");
jp=new JPanel();
js=new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
//jp.setLayout(new FlowLayout(FlowLayout.LEFT,1,1));
jf.setLayout(new BorderLayout(10,10));
jp.setLayout(new GridLayout(0,1,1,1));
jp.setPreferredSize(new Dimension(500, 82*6));
for(int i=0;i<6;i++){
myPanel mp=new myPanel();
//mp.setSize(400, 82);
//mp.setBounds(0,82*i,480,82);
mp.getFileTypeIconLabel().setText(String.valueOf(i));
mp.setIndexId(size);
size++;
mpList.add(0,mp);
mp.addMouseListener(new MouseListener(){
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
if(2==e.getClickCount()){
System.out.println("indexInd is"+mpList.get(0).getIndexId());
//System.out.println(index);
mpList.get(0).setBackground(Color.yellow);
}
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}});
jp.add(mpList.get(0));
}
js.setViewportView(jp);
jf.setSize(600, 500);
jf.add(btnPanel,BorderLayout.NORTH);
jf.add(js);
jbtAdd.addActionListener(this);
jbtDelete.addActionListener(this);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String args[]){
new Main();
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource()==jbtAdd){
addMyPanel();
}
else if(e.getSource()==jbtDelete){
delMyPanel();
}
}
public void addMyPanel(){
System.out.println("ok");
mp=new myPanel();
mp.getFileTypeIconLabel().setText(String.valueOf(mpList.size()));
mp.setIndexId(size);
System.out.println(size);
size++;
mpList.add(0, mp);
mp.addMouseListener(new MouseListener(){
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
if(2==e.getClickCount()){
System.out.println("indexInd is"+mpList.get(0).getIndexId());
//System.out.println(index);
mpList.get(0).setBackground(Color.yellow);
}
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}});
jp.add(mpList.get(0));
jp.setPreferredSize(new Dimension(500, 82*mpList.size()));
//jp.validate();
js.validate();
//jp.repaint();
js.repaint();
}
public void delMyPanel(){
selectedId=getIndexOfMyPanelById();
if(selectedId>=0){
int indexId=getIndexOfMyPanelById();
jp.remove(mpList.get(indexId));
mpList.remove(indexId);
jp.setPreferredSize(new Dimension(500,82*mpList.size()));
jp.repaint();
}
}
protected int getIndexOfMyPanelById(){
Iterator<myPanel> it=mpList.iterator();
for(int id=0;it.hasNext();id++){
myPanel mp;
mp=it.next();
if(mp.isSelected()){
return id;
}
}
return -1;
}
}
Aquí está el código demyPanel
class myPanel extends JPanel{
private static final long serialVersionUID = 1L;
private JProgressBar downloadProgress;
private JLabel fileTypeIconLabel,fileNameLabel,downloadInfoLabel,freeLabel;
private int indexId;
private boolean isSelected=false;
protected myPanel(){
setLayout(null);
downloadProgress=new JProgressBar(0,100);
fileTypeIconLabel=new JLabel("test");
fileNameLabel=new JLabel("fileNameLabel");
downloadInfoLabel=new JLabel("downloadInfoLabel");
freeLabel=new JLabel("freeLabel");
downloadProgress.setBounds(80, 44, 400, 18);
downloadProgress.setStringPainted(true);
//downloadProgress.setString("88%");
fileTypeIconLabel.setBounds(0, 0, 80, 80);
fileTypeIconLabel.setBackground(Color.cyan);
fileTypeIconLabel.setOpaque(true);
fileNameLabel.setBounds(80,0,400,22);
fileNameLabel.setBackground(Color.black);
fileNameLabel.setOpaque(true);
downloadInfoLabel.setBounds(80, 22, 400, 22);
downloadInfoLabel.setBackground(Color.red);
downloadInfoLabel.setOpaque(true);
//downloadProgress.setValue(50);
freeLabel.setBounds(80, 62, 400, 18);
freeLabel.setBackground(Color.lightGray);
freeLabel.setOpaque(true);
add(downloadProgress);
add(fileTypeIconLabel);
add(fileNameLabel);
add(downloadInfoLabel);
add(freeLabel);
}
protected JLabel getFileTypeIconLabel() {
return fileTypeIconLabel;
}
protected int getIndexId() {
return indexId;
}
protected void setIndexId(int indexId) {
this.indexId = indexId;
}
protected boolean isSelected() {
return isSelected;
}
protected void setSelected(boolean isSelected) {
this.isSelected = isSelected;
}
}