frontend/src/yukihane/inqubus/gui/ContentTransferHandler.java

   1 package yukihane.inqubus.gui;
   2
   3 import java.awt.datatransfer.DataFlavor;
   4 import java.awt.datatransfer.Transferable;
   5 import java.awt.datatransfer.UnsupportedFlavorException;
   6 import java.io.File;
   7 import java.io.IOException;
   8 import java.util.List;
   9 import java.util.logging.Level;
  10 import java.util.logging.Logger;
  11 import javax.swing.JCheckBox;
  12 import javax.swing.TransferHandler;
  13 import javax.swing.text.JTextComponent;
  14
  15 /**
  16  * メイン画面の動画/コメント入力フィールド用TransferHandler
  17  * @author yuki
  18  */
  19 class ContentTransferHandler extends TransferHandler {
  20
  21     private static final long serialVersionUID = 1L;
  22     private static final Logger logger = Logger.getLogger(ContentTransferHandler.class.getName());
  23     private final JCheckBox cbLocal;
  24     private final TransferHandler defaultTransferHandler;
  25
  26     /**
  27      *
  28      * @param defaultTransferHandler 対象JTextFieldインスタンスのデフォルトtransfer handler.
  29      * @param cbLocal 対応するローカルチェックボックス.
  30      */
  31     ContentTransferHandler(TransferHandler defaultTransferHandler, JCheckBox cbLocal) {
  32         this.defaultTransferHandler = defaultTransferHandler;
  33         this.cbLocal = cbLocal;
  34     }
  35
  36     @Override
  37     public boolean canImport(TransferHandler.TransferSupport support) {
  38         if (!cbLocal.isSelected()) {
  39             return defaultTransferHandler.canImport(support);
  40         }
  41
  42         if (!support.isDataFlavorSupported(DataFlavor.javaFileListFlavor)
  43                 && !support.isDataFlavorSupported(DataFlavor.stringFlavor)) {
  44             return false;
  45         }
  46
  47         if (support.isDrop()) {
  48             support.setDropAction(LINK);
  49         }
  50         return true;
  51     }
  52
  53     @Override
  54     public boolean importData(TransferHandler.TransferSupport support) {
  55         if (!cbLocal.isSelected() || !support.isDrop()) {
  56             return defaultTransferHandler.importData(support);
  57         }
  58
  59         final Transferable tr = support.getTransferable();
  60         try {
  61             String text;
  62             if (tr.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
  63                 @SuppressWarnings("unchecked")
  64                 final List<File> files = (List<File>) tr.getTransferData(DataFlavor.javaFileListFlavor);
  65                 if (files.size() > 0) {
  66                     File file = files.get(0);
  67                     text = file.getPath();
  68                 } else {
  69                     text = "";
  70                 }
  71             } else if (tr.isDataFlavorSupported(DataFlavor.stringFlavor)) {
  72                 text = (String) tr.getTransferData(DataFlavor.stringFlavor);
  73             } else {
  74                 return false;
  75             }
  76             final JTextComponent comp = (JTextComponent) support.getComponent();
  77             comp.setText(text);
  78             return true;
  79         } catch (UnsupportedFlavorException | IOException ex) {
  80             logger.log(Level.SEVERE, null, ex);
  81         }
  82         return false;
  83     }
  84 }