Examples of ae.java.awt.dnd.DropTarget

ae.java.awt.dnd.DropTarget
The DropTarget is associated with a Component when that Component wishes to accept drops during Drag and Drop operations.
Each DropTarget is associated with a FlavorMap. The default FlavorMap hereafter designates the FlavorMap returned by SystemFlavorMap.getDefaultFlavorMap(). @since 1.2


    public synchronized void setDropTarget(DropTarget dt) {
        if (dt == dropTarget || (dropTarget != null && dropTarget.equals(dt)))
            return;


        DropTarget old;


        if ((old = dropTarget) != null) {
            if (peer != null) dropTarget.removeNotify(peer);


            DropTarget t = dropTarget;


            dropTarget = null;


            try {
                t.setComponent(null);
            } catch (IllegalArgumentException iae) {
                // ignore it.
            }
        }

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        static final EventTargetFilter FILTER = new DropTargetEventTargetFilter();


        private DropTargetEventTargetFilter() {}


        public boolean accept(final Component comp) {
            DropTarget dt = comp.getDropTarget();
            return dt != null && dt.isActive();
        }

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     * actual processing on EventQueue Thread
     */


    protected void processEnterMessage(SunDropTargetEvent event) {
        Component  c    = (Component)event.getSource();
        DropTarget dt   = c.getDropTarget();
        Point      hots = event.getPoint();


        local = getJVMLocalSourceTransferable();


        if (currentDTC != null) { // some wreckage from last time
            currentDTC.removeNotify();
            currentDTC = null;
        }


        if (c.isShowing() && dt != null && dt.isActive()) {
            currentDT  = dt;
            currentDTC = currentDT.getDropTargetContext();


            currentDTC.addNotify(this);


            currentA   = dt.getDefaultActions();


            try {
                ((DropTargetListener)dt).dragEnter(new DropTargetDragEvent(currentDTC,
                                                                           hots,
                                                                           currentDA,

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     *
     */


    protected void processExitMessage(SunDropTargetEvent event) {
        Component         c   = (Component)event.getSource();
        DropTarget        dt  = c.getDropTarget();
        DropTargetContext dtc = null;


        if (dt == null) {
            currentDT = null;
            currentT  = null;


            if (currentDTC != null) {
                currentDTC.removeNotify();
            }


            currentDTC = null;


            return;
        }


        if (dt != currentDT) {


            if (currentDTC != null) {
                currentDTC.removeNotify();
            }


            currentDT  = dt;
            currentDTC = dt.getDropTargetContext();


            currentDTC.addNotify(this);
        }


        dtc = currentDTC;


        if (dt.isActive()) try {
            ((DropTargetListener)dt).dragExit(new DropTargetEvent(dtc));
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            currentA  = DnDConstants.ACTION_NONE;

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    protected void processMotionMessage(SunDropTargetEvent event,
                                      boolean operationChanged) {
        Component         c    = (Component)event.getSource();
        Point             hots = event.getPoint();
        int               id   = event.getID();
        DropTarget        dt   = c.getDropTarget();
        DropTargetContext dtc  = null;


        if (c.isShowing() && (dt != null) && dt.isActive()) {
            if (currentDT != dt) {
                if (currentDTC != null) {
                    currentDTC.removeNotify();
                }

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     */


    protected void processDropMessage(SunDropTargetEvent event) {
        Component  c    = (Component)event.getSource();
        Point      hots = event.getPoint();
        DropTarget dt   = c.getDropTarget();


        dropStatus   = STATUS_WAIT; // drop pending ACK
        dropComplete = false;


        if (c.isShowing() && dt != null && dt.isActive()) {
            DropTargetContext dtc = dt.getDropTargetContext();


            currentDT = dt;


            if (currentDTC != null) {
                currentDTC.removeNotify();
            }


            currentDTC = dtc;
            currentDTC.addNotify(this);
            currentA = dt.getDefaultActions();


            synchronized(_globalLock) {
                if ((local = getJVMLocalSourceTransferable()) != null)
                    setCurrentJVMLocalSourceTransferable(null);
            }

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ae.java.awt.Component

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ae.java.awt.Toolkit

ae.sun.awt.dnd.SunDropTargetContextPeer

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