Java 列表选择器
//对JList的用法,从一个列表中将数据转移到另外一个列表中,封装的比较好,个人觉得是个比较好的工具
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JListChooser extends JDialog implements ActionListener,
MouseListener{
JPanel pCenter = new JPanel();
JPanel pSouth = new JPanel();
JButton bttOk = new JButton();
JButton bttCancel = new JButton();
DefaultListModel modelSource = new DefaultListModel();
DefaultListModel modelTarget = new DefaultListModel();
JList listSource = new JList(modelSource);
JList listTarget = new JList(modelTarget);
JScrollPane spLeft = new JScrollPane(listSource);
JScrollPane spRight = new JScrollPane(listTarget);
JPanel pOptions = new JPanel();
JButton bttRemoveAll = new JButton();
JButton bttRemove = new JButton();
JButton bttAddAll = new JButton();
JButton bttAdd = new JButton();
boolean isOkButtonClicked = false;
FlowLayout2 flowLayout2 = new FlowLayout2();
public static String[] showDialog(Component c, String title, boolean modal,
String initResources[]){
JListChooser dialog;
Window owner = JFontDialog.getRootWindow(c);
if(owner instanceof Dialog){
dialog = new JListChooser((Dialog)owner, title, modal);
} else if(owner instanceof Frame){
dialog = new JListChooser((Frame)owner, title, modal);
} else{
dialog = new JListChooser((Frame)owner, title, modal);
dialog.setTitle(title);
}
if(initResources != null){
dialog.setResource(initResources);
}
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
dialog.setLocation((d.width - dialog.getSize().width) / 2,
(d.height - dialog.getSize().height) / 2);
dialog.show();
return dialog.getResource();
}
public JListChooser(Frame frame, String title, boolean modal){
super(frame, title, modal);
try{
jbInit();
} catch(Exception ex){
ex.printStackTrace();
}
}
public JListChooser(Dialog frame, String title, boolean modal){
super(frame, title, modal);
try{
jbInit();
} catch(Exception ex){
ex.printStackTrace();
}
}
public JListChooser(){
this((Frame)null, "", false);
}
private void jbInit() throws Exception{
this.setSize(400, 320);
bttOk.setText("OK");
bttCancel.setText("Cancel");
// bttOk.setText(OpenSwingUtil.getOpenResource("OK"));
// bttCancel.setText(OpenSwingUtil.getOpenResource("Cancel"));
bttCancel.setMnemonic('C');
bttRemoveAll.setText("<<");
bttRemove.setPreferredSize(new Dimension(47, 25));
bttRemove.setText("<");
bttAddAll.setText(">>");
bttAdd.setPreferredSize(new Dimension(47, 25));
bttAdd.setText(">");
pOptions.setSize(60, 1);
pOptions.add(bttAdd);
pOptions.add(bttAddAll);
pOptions.add(bttRemove);
pOptions.add(bttRemoveAll);
pSouth.add(bttOk);
pSouth.add(bttCancel);
pCenter.setLayout(flowLayout2);
pCenter.add(spLeft, FlowLayout2.LEFT);
pCenter.add(pOptions, FlowLayout2.CENTER);
pCenter.add(spRight, FlowLayout2.RIGHT);
this.getContentPane().add(pCenter, BorderLayout.CENTER);
this.getContentPane().add(pSouth, BorderLayout.SOUTH);
bttAdd.addActionListener(this);
bttAddAll.addActionListener(this);
bttRemove.addActionListener(this);
bttRemoveAll.addActionListener(this);
bttOk.addActionListener(this);
bttCancel.addActionListener(this);
listSource.addMouseListener(this);
listTarget.addMouseListener(this);
bttAdd.setFocusable(false);
bttAddAll.setFocusable(false);
bttRemove.setFocusable(false);
bttRemoveAll.setFocusable(false);
bttRemove.setEnabled(false);
bttRemoveAll.setEnabled(false);
listSource.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
listTarget.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
this.getRootPane().setDefaultButton(bttOk);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
if(!isOkButtonClicked){
modelTarget.removeAllElements();
}
}
});
}
public void mouseClicked(MouseEvent e){
}
public void mousePressed(MouseEvent e){
if(e.getClickCount() != 2){
return;
}
if(e.getSource() == this.listSource){
bttAdd.doClick();
} else if(e.getSource() == this.listTarget){
bttRemove.doClick();
}
}
public void mouseReleased(MouseEvent e){
}
public void mouseEntered(MouseEvent e){
}
public void mouseExited(MouseEvent e){
}
public void setResource(String str[]){
this.modelSource.clear();
for(int i = 0; i < str.length; i++){
modelSource.addElement(str[i]);
}
listSource.setSelectedIndex(0);
}
public String[] getResource(){
String s[] = new String[modelTarget.getSize()];
for(int i = 0; i < s.length; i++){
s[i] = modelTarget.getElementAt(i).toString();
}
return s;
}
public void actionPerformed(ActionEvent e){
Object obj = e.getSource();
if(obj == bttAdd){
int index = listSource.getSelectedIndex();
if(index == -1){
return;
}
modelTarget.addElement(listSource.getSelectedValue());
modelSource.remove(index);
listSource.setSelectedIndex(Math.max(0,
Math.min(index,
modelSource.size() - 1)));
listTarget.setSelectedIndex(modelTarget.size() - 1);
} else if(obj == bttAddAll){
while(modelSource.size() != 0){
modelTarget.addElement(modelSource.get(0));
modelSource.remove(0);
}
listTarget.setSelectedIndex(modelTarget.size() - 1);
} else if(obj == bttRemove){
int index = listTarget.getSelectedIndex();
if(index == -1){
return;
}
modelSource.addElement(listTarget.getSelectedValue());
modelTarget.remove(index);
listTarget.setSelectedIndex(Math.max(0,
Math.min(index,
modelTarget.size() - 1)));
listSource.setSelectedIndex(modelSource.size() - 1);
} else if(obj == bttRemoveAll){
while(modelTarget.size() != 0){
modelSource.addElement(modelTarget.get(0));
modelTarget.remove(0);
}
listSource.setSelectedIndex(modelSource.size() - 1);
} else if(obj == bttOk){
isOkButtonClicked = true;
this.setVisible(false);
return;
} else if(obj == bttCancel){
isOkButtonClicked = false;
this.setVisible(false);
return;
}
bttAdd.setEnabled(modelSource.size() != 0);
bttAddAll.setEnabled(modelSource.size() != 0);
bttRemove.setEnabled(modelTarget.size() != 0);
bttRemoveAll.setEnabled(modelTarget.size() != 0);
listSource.ensureIndexIsVisible(listSource.getSelectedIndex());
listTarget.ensureIndexIsVisible(listTarget.getSelectedIndex());
}
public static void main(String[] args){
JFrame frame = OpenSwingUtil.createDemoFrame("JListChooser Demo");
frame.setSize(600, 400);
JTextArea txt = new JTextArea("Current Selection:\n");
frame.getContentPane().add(new JScrollPane(txt), BorderLayout.CENTER);
frame.setVisible(true);
String str[] =
JListChooser.showDialog(txt, "JListChooser Demo",
true,
GraphicsEnvironment.
getLocalGraphicsEnvironment().
getAvailableFontFamilyNames());
// String str[] = {"jdfjdkjd","解放路口","fdkf"};
String s = "";
for(int i = 0; i < str.length; i++){
s += "\t" + str[i] + "\n";
}
txt.setText(txt.getText() + s);
}
}
class FlowLayout2 implements LayoutManager, java.io.Serializable{
public static final String LEFT = "LEFT";
public static final String CENTER = "CENTER";
public static final String RIGHT = "RIGHT";
private Component leftC, centerC, rightC;
int hgap;
int vgap;
public int getHgap(){
return hgap;
}
public void setVgap(int vgap){
this.vgap = vgap;
}
public void setHgap(int hgap){
this.hgap = hgap;
}
public int getVgap(){
return vgap;
}
public FlowLayout2(){
this(5, 5);
}
public FlowLayout2(int align, int hgap){
this.hgap = hgap;
this.vgap = vgap;
}
public void addLayoutComponent(String name, Component comp){
if(name.equals(LEFT)){
leftC = comp;
} else if(name.equals(CENTER)){
centerC = comp;
} else if(name.equals(RIGHT)){
rightC = comp;
} else{
throw new IllegalArgumentException(
"cannot add to layout: unknown constraint: " + name);
}
}
public void removeLayoutComponent(Component comp){}
public Dimension preferredLayoutSize(Container target){
synchronized(target.getTreeLock()){
Dimension dim = new Dimension(0, 0);
int nmembers = target.getComponentCount();
for(int i = 0; i < nmembers; i++){
Component m = target.getComponent(i);
Dimension d = m.getPreferredSize();
dim.height = Math.max(dim.height, d.height);
dim.width += d.width;
}
Insets insets = target.getInsets();
dim.width += insets.left + insets.right + hgap * 4;
dim.height += insets.top + insets.bottom + vgap * 2;
return dim;
}
}
public Dimension minimumLayoutSize(Container target){
return preferredLayoutSize(target);
}
public void layoutContainer(Container target){
synchronized(target.getTreeLock()){
Insets insets = target.getInsets();
int centerWidth = centerC.getWidth();
int x = insets.left + hgap;
int y = insets.top + vgap;
int h = target.getHeight() - insets.top - insets.bottom - vgap * 2;
int w = target.getWidth() - insets.right - insets.left - hgap * 2;
int wlr = (w - centerWidth - hgap * 2) / 2;
leftC.setBounds(x, y, wlr, h);
x += wlr + hgap;
centerC.setBounds(x, y, centerWidth, h);
x += centerWidth + hgap;
rightC.setBounds(x, y, wlr, h);
}
}
}