java类java.awt.dnd.DragSource的实例源码

public SourcePanel () {
    setPreferredSize(new Dimension(200, 200));
    DragSource defaultDragSource =
            DragSource.getDefaultDragSource();
    defaultDragSource.createDefaultDragGestureRecognizer(this,
            DnDConstants.ACTION_COPY_OR_MOVE, dragGestureListener);
    setBackground(Color.RED);
}

SourceFileListFrame() {
    super("Source File List Frame");
    extractFilesFromTheWorkingDirectory();
    initList();
    initGUI();
    new DragSource().createDefaultDragGestureRecognizer(list,
            DnDConstants.ACTION_COPY,this);
}

SourceFileListFrame() {
    super("Source File List Frame");
    extractFilesFromTheWorkingDirectory();
    initList();
    initGUI();
    new DragSource().createDefaultDragGestureRecognizer(list,
            DnDConstants.ACTION_COPY,this);
}

SourceFileListFrame() {
    super("Source File List Frame");
    extractFilesFromTheWorkingDirectory();
    initList();
    initGUI();
    new DragSource().createDefaultDragGestureRecognizer(list,
            DnDConstants.ACTION_COPY,this);
}

public SourcePanel() {
    setPreferredSize(new Dimension(200, 200));
    DragSource defaultDragSource =
            DragSource.getDefaultDragSource();
    defaultDragSource.createDefaultDragGestureRecognizer(this,
            DnDConstants.ACTION_COPY_OR_MOVE, dragGestureListener);
    setBackground(Color.RED);
}

@Override
public <T extends DragGestureRecognizer> T
    createDragGestureRecognizer(Class<T> abstractRecognizerClass,
                                DragSource ds, Component c,
                                int srcActions, DragGestureListener dgl)
{
    return null;
}

@Override
public <T extends DragGestureRecognizer> T
    createDragGestureRecognizer(Class<T> abstractRecognizerClass,
                                DragSource ds, Component c,
                                int srcActions, DragGestureListener dgl)
{
    return null;
}

/**
 * Create a drag gesture recognizer for the lightweight frame.
 */
default public <T extends DragGestureRecognizer> T createDragGestureRecognizer(
        Class<T> abstractRecognizerClass,
        DragSource ds, Component c, int srcActions,
        DragGestureListener dgl)
{
    return null;
}

public <T extends DragGestureRecognizer> T createDragGestureRecognizer(
        Class<T> abstractRecognizerClass,
        DragSource ds, Component c, int srcActions,
        DragGestureListener dgl)
{
    return content == null ? null : content.createDragGestureRecognizer(
            abstractRecognizerClass, ds, c, srcActions, dgl);
}

/**
 * Returns whether or not the event is potentially part of a drag sequence.
 */
private boolean mousePressedImpl(MouseEvent me) {
    component = (JComponent)me.getSource();

    if (mapDragOperationFromModifiers(me, component.getTransferHandler())
            != TransferHandler.NONE) {

        motionThreshold = DragSource.getDragThreshold();
        dndArmedEvent = me;
        return true;
    }

    clearState();
    return false;
}