Java。將ImageIcon從面板1的JLabel拖放到面板2的JLabel。添加計數器功能

這基本上是@Andrew的評論的概述-由于您的SSCCE，很容易實現:-)

子類TransferHandler，重寫canImport以檢查源標簽是否在imageSelect面板上，如果不是，則拒絕。

// custom transferHandler which decides about imports based on source TransferHandler handler = new TransferHandler('icon') {@Overridepublic boolean canImport(TransferSupport support) { return super.canImport(support) && support.getComponent().getParent() != imageSelectPanel;} }; // use the handler on all labels (handlers can be shared, btw) // for each label on imageSelectPanel imageSelectLabel.setTransferHandler(handler) // for each label on the target panel (aka storyPanel) storyLabel.setTransferHandler(handler)解決方法

我已經在兩個JPanel之間實現了這種非?；镜耐戏挪僮?，但這并不能真正滿足我的要求！

public class test extends JFrame {{ JPanel mainpanel,storypanel,imageselect; public test(){ mainpanel = new JPanel(new BorderLayout()); storypanel = new JPanel(); imageselect = new JPanel(); MouseListener listener = new MouseAdapter(){ public void mousePressed(MouseEvent e){ JComponent c = (JComponent) e.getSource(); TransferHandler handler = c.getTransferHandler(); handler.exportAsDrag(c,e,TransferHandler.COPY);}}; int j = 0; BufferedImage myImages; JLabel imgselect = new JLabel(); try { myImages = ImageIO.read(new File('four.jpg')); //myImages[j] = resize(myImages[j]); imgselect= new JLabel(new ImageIcon(myImages)); System.out.println(j); imageselect.add(imgselect); imgselect.addMouseListener(listener); imgselect.setTransferHandler(new TransferHandler('icon')); } catch(Exception e) {}; int i = 0; BufferedImage storyimages; JLabel storylabel = new JLabel(); //targetImg = new ImageIcon('lmkpackage/base/TargetImg.jpg'); try{ storyimages = ImageIO.read(new File('TargetImg.jpg')); //storyimages[i] = resize(storyimages[i]); storylabel = new JLabel(new ImageIcon(storyimages)); System.out.println(i); storypanel.add(storylabel); storylabel.addMouseListener(listener); storylabel.setTransferHandler(new TransferHandler('icon')); } catch(Exception e) {}; mainpanel.add(imageselect,BorderLayout.NORTH); mainpanel.add(storypanel,BorderLayout.SOUTH); getContentPane().add(mainpanel);}public static void main(String[] args){System.out.println('Application Running');JFrame mainframe = new test(); mainframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);mainframe.setSize(1000,1000); mainframe.setVisible(true);} }

對不起，我在這里不太清楚。我試圖將ImageIcon從imageselect面板上的JLabel拖動到故事情節面板上的另一個JLabel。我可以使用上面的代碼來做到這一點。但是，當我這樣做時，可以從imageselect面板中拖動一個ImageIcon，然后在同一面板上替換另一個ImageIcon。我不希望這種情況發生。我也可以從故事情節面板拖到不需要的圖像選擇面板。

我并不是要成為傻瓜式的代碼，我只是在尋找正確的方向！

編輯：我想知道有什么方法可以計算成功的拖放操作，下面的解決方案回答了我的原始問題。