チェス ゲームのユーザー インターフェイスを構築しようとしています。JLabelsで満たされたGridBagLayoutを使用しました。チェスの駒はJLabelsのImageIcons です。
次に、ボード上でドラッグしてピースを移動したいと思います。ImageIconsでこれを行う方法はありますか? または、問題を解決するためのより良い方法はありますか?
編集：これはサンプルコードです。iconImage は移動できますが、マウスで「ドラッグ」することはできません。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.HashMap;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class MainDebug extends JFrame implements MouseListener {
private JPanel BoardPanel;
private String buffercase_mousepressed;
private String buffercase_mouseentered;
private JLabel A8 = new JLabel("A8");
private JLabel B8 = new JLabel("B8");
private HashMap componentMap;
private ImageIcon RookIcon = createImageIcon("50px-Rook.png", "Rook");
public MainDebug(String name) {
super(name);
setResizable(true);
}
private ImageIcon createImageIcon(String path, String description) {
java.net.URL imgURL = getClass().getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
public void addComponentsToPane(final Container pane) {
BoardPanel = new JPanel();
BoardPanel.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
Dimension dim50 = new Dimension(50,50);
A8.setOpaque(true);
A8.setBackground(Color.white);
A8.setPreferredSize(dim50);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 0;
BoardPanel.add(A8,c);
A8.setName("A8");
A8.addMouseListener(this);
B8.setOpaque(true);
B8.setBackground(Color.lightGray);
B8.setPreferredSize(dim50);
B8.setName("B8");
c.gridx=1;
BoardPanel.add(B8,c);
B8.addMouseListener(this);
A8.setIcon(RookIcon);
pane.add(BoardPanel, BorderLayout.CENTER);
createComponentMap();
}
private void createComponentMap() {
componentMap = new HashMap<String,Component>();
int max_components = BoardPanel.getComponentCount();
//Component[] components = BoardPanel.getComponentCount();
//Component[] components = BoardPanel.getContentPane().getComponents();
for (int i=0; i < max_components; i++) {
componentMap.put(BoardPanel.getComponent(i).getName(), BoardPanel.getComponent(i));
}
}
public Component getComponentByName(String name) {
if (componentMap.containsKey(name)) {
return (Component) componentMap.get(name);
}
else return null;
}
public void mousePressed(MouseEvent e) {
buffercase_mousepressed = e.getComponent().getName();
}
public void mouseReleased(MouseEvent e) {
moveIcon(buffercase_mousepressed,buffercase_mouseentered);
}
public void mouseEntered(MouseEvent e) {
buffercase_mouseentered = e.getComponent().getName();
}
public void mouseExited(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
public void moveIcon(String A, String B){
if ((A != null) && (B != null)){
JLabel Ja = (JLabel)getComponentByName(A);
JLabel Jb = (JLabel)getComponentByName(B);
Icon iconeA = Ja.getIcon();
Icon iconeB = Jb.getIcon();
if (iconeA != null && iconeB == null){
Ja.setIcon(null);
Jb.setIcon(iconeA);
}
}
buffercase_mousepressed = null;
buffercase_mouseentered = null;
}
private static void createAndShowGUI() {
//Create and set up the window.
MainDebug frame = new MainDebug("Test interface");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
frame.addComponentsToPane(frame.getContentPane());
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
