Drag and drop compressed files from swing to native [update]

Question

I am trying to move files from a compressed archive to my own system (basycally, windows' eplorer) using drag and drop operations.

My only idea at the moment is to create a TransferHandler, which at startup will unpack the file in a temporary directory and configure this file as portable. Here is a snippet of code to make yourself clearer:

private class FileTransferHandler extends TransferHandler {
    protected Transferable createTransferable(JComponent c) {
        List<File> files = new ArrayList<File>();

        try {
            File temp = createTempDirectory();
            String path = temp.getAbsolutePath();
            decompressTo(path);
            files.add(new File(path));
        } catch (Exception e) { e.printStackTrace(); };
        return new FileTransferable(files);
    }

    public int getSourceActions(JComponent c) {
        return COPY;
    }
}

private class FileTransferable implements Transferable {
    private List<File> files;

    public FileTransferable(List<File> files) {
       this.files = files;
    }

    public DataFlavor[] getTransferDataFlavors() {
        return new DataFlavor[]{ DataFlavor.javaFileListFlavor };
    }

    public boolean isDataFlavorSupported(DataFlavor flavor) {
        return flavor.equals(DataFlavor.javaFileListFlavor);
    }

    public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
        if (!isDataFlavorSupported(flavor)) {
            throw new UnsupportedFlavorException(flavor);
        }
        return files;
    }
}

(not valid: the thing that puzzles me is that it works like that: but only if I don't do anything after releasing the mouse button.)

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Answer 1

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