下面列出了怎么用sun.awt.dnd.SunDropTargetEvent的API类实例代码及写法，或者点击链接到github查看源代码。
private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
if (e instanceof SunDropTargetEvent) {
trackDropTargetEnterExit(targetOver, e);
return;
}
int id = e.getID();
if ( id != MouseEvent.MOUSE_EXITED &&
id != MouseEvent.MOUSE_DRAGGED &&
id != LWD_MOUSE_DRAGGED_OVER &&
!isMouseInNativeContainer) {
// any event but an exit or drag means we're in the native container
isMouseInNativeContainer = true;
startListeningForOtherDrags();
} else if (id == MouseEvent.MOUSE_EXITED) {
isMouseInNativeContainer = false;
stopListeningForOtherDrags();
}
Component tle = retargetMouseEnterExit(targetOver, e,
targetLastEntered.get(),
isMouseInNativeContainer);
targetLastEntered = new WeakReference<>(tle);
}
private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
if (e instanceof SunDropTargetEvent) {
trackDropTargetEnterExit(targetOver, e);
return;
}
int id = e.getID();
if ( id != MouseEvent.MOUSE_EXITED &&
id != MouseEvent.MOUSE_DRAGGED &&
id != LWD_MOUSE_DRAGGED_OVER &&
!isMouseInNativeContainer) {
// any event but an exit or drag means we're in the native container
isMouseInNativeContainer = true;
startListeningForOtherDrags();
} else if (id == MouseEvent.MOUSE_EXITED) {
isMouseInNativeContainer = false;
stopListeningForOtherDrags();
}
Component tle = retargetMouseEnterExit(targetOver, e,
targetLastEntered.get(),
isMouseInNativeContainer);
targetLastEntered = new WeakReference<>(tle);
}
protected void eventProcessed(SunDropTargetEvent e, int returnValue,
boolean dispatcherDone) {
/* The native context is the pointer to the XClientMessageEvent
structure. */
long ctxt = getNativeDragContext();
/* If the event was not consumed, send a response to the source. */
try {
if (ctxt != 0 && !e.isConsumed()) {
Iterator dropTargetProtocols =
XDragAndDropProtocols.getDropTargetProtocols();
while (dropTargetProtocols.hasNext()) {
XDropTargetProtocol dropTargetProtocol =
(XDropTargetProtocol)dropTargetProtocols.next();
if (dropTargetProtocol.sendResponse(ctxt, e.getID(),
returnValue)) {
break;
}
}
}
} finally {
if (dispatcherDone && ctxt != 0) {
unsafe.freeMemory(ctxt);
}
}
}
private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
if (e instanceof SunDropTargetEvent) {
trackDropTargetEnterExit(targetOver, e);
return;
}
int id = e.getID();
if ( id != MouseEvent.MOUSE_EXITED &&
id != MouseEvent.MOUSE_DRAGGED &&
id != LWD_MOUSE_DRAGGED_OVER &&
!isMouseInNativeContainer) {
// any event but an exit or drag means we're in the native container
isMouseInNativeContainer = true;
startListeningForOtherDrags();
} else if (id == MouseEvent.MOUSE_EXITED) {
isMouseInNativeContainer = false;
stopListeningForOtherDrags();
}
Component tle = retargetMouseEnterExit(targetOver, e,
targetLastEntered.get(),
isMouseInNativeContainer);
targetLastEntered = new WeakReference<>(tle);
}
protected void eventProcessed(SunDropTargetEvent e, int returnValue,
boolean dispatcherDone) {
/* The native context is the pointer to the XClientMessageEvent
structure. */
long ctxt = getNativeDragContext();
/* If the event was not consumed, send a response to the source. */
try {
if (ctxt != 0 && !e.isConsumed()) {
Iterator dropTargetProtocols =
XDragAndDropProtocols.getDropTargetProtocols();
while (dropTargetProtocols.hasNext()) {
XDropTargetProtocol dropTargetProtocol =
(XDropTargetProtocol)dropTargetProtocols.next();
if (dropTargetProtocol.sendResponse(ctxt, e.getID(),
returnValue)) {
break;
}
}
}
} finally {
if (dispatcherDone && ctxt != 0) {
unsafe.freeMemory(ctxt);
}
}
}
private static int eventToCacheIndex(AWTEvent e) {
switch(e.getID()) {
case PaintEvent.PAINT:
return PAINT;
case PaintEvent.UPDATE:
return UPDATE;
case MouseEvent.MOUSE_MOVED:
return MOVE;
case MouseEvent.MOUSE_DRAGGED:
// Return -1 for SunDropTargetEvent since they are usually synchronous
// and we don't want to skip them by coalescing with MouseEvent or other drag events
return e instanceof SunDropTargetEvent ? -1 : DRAG;
default:
return e instanceof PeerEvent ? PEER : -1;
}
}
@Override
protected void processMotionMessage(SunDropTargetEvent event, boolean operationChanged) {
boolean eventInsideTarget = isEventInsideTarget(event);
if (event.getComponent().getDropTarget() == insideTarget) {
if (!eventInsideTarget) {
processExitMessage(event);
return;
}
} else {
if (eventInsideTarget) {
processEnterMessage(event);
} else {
return;
}
}
super.processMotionMessage(event, operationChanged);
}
@Override
protected void eventPosted(final SunDropTargetEvent e) {
if (e.getID() != SunDropTargetEvent.MOUSE_DROPPED) {
Runnable runnable = new Runnable() {
@Override
public void run() {
e.getDispatcher().unregisterAllEvents();
}
};
// NOTE: this PeerEvent must be a NORM_PRIORITY event to be
// dispatched after this SunDropTargetEvent, but before the next
// one, so we should pass zero flags.
PeerEvent peerEvent = new PeerEvent(e.getSource(), runnable, 0);
SunToolkit.executeOnEventHandlerThread(peerEvent);
}
}
@Override
protected void eventPosted(final SunDropTargetEvent e) {
if (e.getID() != SunDropTargetEvent.MOUSE_DROPPED) {
Runnable runnable = new Runnable() {
@Override
public void run() {
e.getDispatcher().unregisterAllEvents();
}
};
// NOTE: this PeerEvent must be a NORM_PRIORITY event to be
// dispatched after this SunDropTargetEvent, but before the next
// one, so we should pass zero flags.
PeerEvent peerEvent = new PeerEvent(e.getSource(), runnable, 0);
SunToolkit.executeOnEventHandlerThread(peerEvent);
}
}
@Override
protected void processMotionMessage(SunDropTargetEvent event, boolean operationChanged) {
boolean eventInsideTarget = isEventInsideTarget(event);
if (event.getComponent().getDropTarget() == insideTarget) {
if (!eventInsideTarget) {
processExitMessage(event);
return;
}
} else {
if (eventInsideTarget) {
processEnterMessage(event);
} else {
return;
}
}
super.processMotionMessage(event, operationChanged);
}
private static int eventToCacheIndex(AWTEvent e) {
switch(e.getID()) {
case PaintEvent.PAINT:
return PAINT;
case PaintEvent.UPDATE:
return UPDATE;
case MouseEvent.MOUSE_MOVED:
return MOVE;
case MouseEvent.MOUSE_DRAGGED:
// Return -1 for SunDropTargetEvent since they are usually synchronous
// and we don't want to skip them by coalescing with MouseEvent or other drag events
return e instanceof SunDropTargetEvent ? -1 : DRAG;
default:
return e instanceof PeerEvent ? PEER : -1;
}
}
@Override
protected void eventPosted(final SunDropTargetEvent e) {
if (e.getID() != SunDropTargetEvent.MOUSE_DROPPED) {
Runnable runnable = new Runnable() {
@Override
public void run() {
e.getDispatcher().unregisterAllEvents();
}
};
// NOTE: this PeerEvent must be a NORM_PRIORITY event to be
// dispatched after this SunDropTargetEvent, but before the next
// one, so we should pass zero flags.
PeerEvent peerEvent = new PeerEvent(e.getSource(), runnable, 0);
SunToolkit.executeOnEventHandlerThread(peerEvent);
}
}
@Override
protected void processMotionMessage(SunDropTargetEvent event, boolean operationChanged) {
boolean eventInsideTarget = isEventInsideTarget(event);
if (event.getComponent().getDropTarget() == insideTarget) {
if (!eventInsideTarget) {
processExitMessage(event);
return;
}
} else {
if (eventInsideTarget) {
processEnterMessage(event);
} else {
return;
}
}
super.processMotionMessage(event, operationChanged);
}
@Override
protected void eventPosted(final SunDropTargetEvent e) {
if (e.getID() != SunDropTargetEvent.MOUSE_DROPPED) {
Runnable runnable = new Runnable() {
@Override
public void run() {
e.getDispatcher().unregisterAllEvents();
}
};
// NOTE: this PeerEvent must be a NORM_PRIORITY event to be
// dispatched after this SunDropTargetEvent, but before the next
// one, so we should pass zero flags.
PeerEvent peerEvent = new PeerEvent(e.getSource(), runnable, 0);
SunToolkit.executeOnEventHandlerThread(peerEvent);
}
}
protected void eventProcessed(SunDropTargetEvent e, int returnValue,
boolean dispatcherDone) {
/* The native context is the pointer to the XClientMessageEvent
structure. */
long ctxt = getNativeDragContext();
/* If the event was not consumed, send a response to the source. */
try {
if (ctxt != 0 && !e.isConsumed()) {
Iterator dropTargetProtocols =
XDragAndDropProtocols.getDropTargetProtocols();
while (dropTargetProtocols.hasNext()) {
XDropTargetProtocol dropTargetProtocol =
(XDropTargetProtocol)dropTargetProtocols.next();
if (dropTargetProtocol.sendResponse(ctxt, e.getID(),
returnValue)) {
break;
}
}
}
} finally {
if (dispatcherDone && ctxt != 0) {
unsafe.freeMemory(ctxt);
}
}
}
@Override
protected void eventPosted(final SunDropTargetEvent e) {
if (e.getID() != SunDropTargetEvent.MOUSE_DROPPED) {
Runnable runnable = new Runnable() {
@Override
public void run() {
e.getDispatcher().unregisterAllEvents();
}
};
// NOTE: this PeerEvent must be a NORM_PRIORITY event to be
// dispatched after this SunDropTargetEvent, but before the next
// one, so we should pass zero flags.
PeerEvent peerEvent = new PeerEvent(e.getSource(), runnable, 0);
SunToolkit.executeOnEventHandlerThread(peerEvent);
}
}
private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
if (e instanceof SunDropTargetEvent) {
trackDropTargetEnterExit(targetOver, e);
return;
}
int id = e.getID();
if ( id != MouseEvent.MOUSE_EXITED &&
id != MouseEvent.MOUSE_DRAGGED &&
id != LWD_MOUSE_DRAGGED_OVER &&
!isMouseInNativeContainer) {
// any event but an exit or drag means we're in the native container
isMouseInNativeContainer = true;
startListeningForOtherDrags();
} else if (id == MouseEvent.MOUSE_EXITED) {
isMouseInNativeContainer = false;
stopListeningForOtherDrags();
}
Component tle = retargetMouseEnterExit(targetOver, e,
targetLastEntered.get(),
isMouseInNativeContainer);
targetLastEntered = new WeakReference<>(tle);
}
private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
if (e instanceof SunDropTargetEvent) {
trackDropTargetEnterExit(targetOver, e);
return;
}
int id = e.getID();
if ( id != MouseEvent.MOUSE_EXITED &&
id != MouseEvent.MOUSE_DRAGGED &&
id != LWD_MOUSE_DRAGGED_OVER &&
!isMouseInNativeContainer) {
// any event but an exit or drag means we're in the native container
isMouseInNativeContainer = true;
startListeningForOtherDrags();
} else if (id == MouseEvent.MOUSE_EXITED) {
isMouseInNativeContainer = false;
stopListeningForOtherDrags();
}
Component tle = retargetMouseEnterExit(targetOver, e,
targetLastEntered.get(),
isMouseInNativeContainer);
targetLastEntered = new WeakReference<>(tle);
}
private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
if (e instanceof SunDropTargetEvent) {
trackDropTargetEnterExit(targetOver, e);
return;
}
int id = e.getID();
if ( id != MouseEvent.MOUSE_EXITED &&
id != MouseEvent.MOUSE_DRAGGED &&
id != LWD_MOUSE_DRAGGED_OVER &&
!isMouseInNativeContainer) {
// any event but an exit or drag means we're in the native container
isMouseInNativeContainer = true;
startListeningForOtherDrags();
} else if (id == MouseEvent.MOUSE_EXITED) {
isMouseInNativeContainer = false;
stopListeningForOtherDrags();
}
Component tle = retargetMouseEnterExit(targetOver, e,
targetLastEntered.get(),
isMouseInNativeContainer);
targetLastEntered = new WeakReference<>(tle);
}
private static int eventToCacheIndex(AWTEvent e) {
switch(e.getID()) {
case PaintEvent.PAINT:
return PAINT;
case PaintEvent.UPDATE:
return UPDATE;
case MouseEvent.MOUSE_MOVED:
return MOVE;
case MouseEvent.MOUSE_DRAGGED:
// Return -1 for SunDropTargetEvent since they are usually synchronous
// and we don't want to skip them by coalescing with MouseEvent or other drag events
return e instanceof SunDropTargetEvent ? -1 : DRAG;
default:
return e instanceof PeerEvent ? PEER : -1;
}
}
@Override
protected void eventPosted(final SunDropTargetEvent e) {
if (e.getID() != SunDropTargetEvent.MOUSE_DROPPED) {
Runnable runnable = new Runnable() {
@Override
public void run() {
e.getDispatcher().unregisterAllEvents();
}
};
// NOTE: this PeerEvent must be a NORM_PRIORITY event to be
// dispatched after this SunDropTargetEvent, but before the next
// one, so we should pass zero flags.
PeerEvent peerEvent = new PeerEvent(e.getSource(), runnable, 0);
SunToolkit.executeOnEventHandlerThread(peerEvent);
}
}
protected void eventProcessed(SunDropTargetEvent e, int returnValue,
boolean dispatcherDone) {
/* The native context is the pointer to the XClientMessageEvent
structure. */
long ctxt = getNativeDragContext();
/* If the event was not consumed, send a response to the source. */
try {
if (ctxt != 0 && !e.isConsumed()) {
Iterator dropTargetProtocols =
XDragAndDropProtocols.getDropTargetProtocols();
while (dropTargetProtocols.hasNext()) {
XDropTargetProtocol dropTargetProtocol =
(XDropTargetProtocol)dropTargetProtocols.next();
if (dropTargetProtocol.sendResponse(ctxt, e.getID(),
returnValue)) {
break;
}
}
}
} finally {
if (dispatcherDone && ctxt != 0) {
unsafe.freeMemory(ctxt);
}
}
}
@Override
protected void processMotionMessage(SunDropTargetEvent event, boolean operationChanged) {
boolean eventInsideTarget = isEventInsideTarget(event);
if (event.getComponent().getDropTarget() == insideTarget) {
if (!eventInsideTarget) {
processExitMessage(event);
return;
}
} else {
if (eventInsideTarget) {
processEnterMessage(event);
} else {
return;
}
}
super.processMotionMessage(event, operationChanged);
}
private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
if (e instanceof SunDropTargetEvent) {
trackDropTargetEnterExit(targetOver, e);
return;
}
int id = e.getID();
if ( id != MouseEvent.MOUSE_EXITED &&
id != MouseEvent.MOUSE_DRAGGED &&
id != LWD_MOUSE_DRAGGED_OVER &&
!isMouseInNativeContainer) {
// any event but an exit or drag means we're in the native container
isMouseInNativeContainer = true;
startListeningForOtherDrags();
} else if (id == MouseEvent.MOUSE_EXITED) {
isMouseInNativeContainer = false;
stopListeningForOtherDrags();
}
Component tle = retargetMouseEnterExit(targetOver, e,
targetLastEntered.get(),
isMouseInNativeContainer);
targetLastEntered = new WeakReference<>(tle);
}
/**
* Dispatches an event to a sub-component if necessary, and
* returns whether or not the event was forwarded to a
* sub-component.
*
* @param e the event
*/
boolean dispatchEvent(AWTEvent e) {
boolean ret = false;
/*
* Fix for BugTraq Id 4389284.
* Dispatch SunDropTargetEvents regardless of eventMask value.
* Do not update cursor on dispatching SunDropTargetEvents.
*/
if (e instanceof SunDropTargetEvent) {
SunDropTargetEvent sdde = (SunDropTargetEvent) e;
ret = processDropTargetEvent(sdde);
} else {
if (e instanceof MouseEvent && (eventMask & MOUSE_MASK) != 0) {
MouseEvent me = (MouseEvent) e;
ret = processMouseEvent(me);
}
if (e.getID() == MouseEvent.MOUSE_MOVED) {
nativeContainer.updateCursorImmediately();
}
}
return ret;
}
/**
* Could be called when DnD enters a heavyweight or synthesized in processMotionMessage
*/
@Override
protected void processEnterMessage(SunDropTargetEvent event) {
Component c = event.getComponent();
DropTarget dt = event.getComponent().getDropTarget();
if (isEventInsideTarget(event)
&& dt != insideTarget
&& c.isShowing()
&& dt != null
&& dt.isActive()) {
insideTarget = dt;
super.processEnterMessage(event);
}
}
protected void eventPosted(final SunDropTargetEvent e) {
if (e.getID() != SunDropTargetEvent.MOUSE_DROPPED) {
Runnable runnable = new Runnable() {
public void run() {
e.getDispatcher().unregisterAllEvents();
}
};
// NOTE: this PeerEvent must be a NORM_PRIORITY event to be
// dispatched after this SunDropTargetEvent, but before the next
// one, so we should pass zero flags.
PeerEvent peerEvent = new PeerEvent(e.getSource(), runnable, 0);
SunToolkit.executeOnEventHandlerThread(peerEvent);
}
}
/**
* Could be called when DnD exits a heavyweight or synthesized in processMotionMessage
*/
@Override
protected void processExitMessage(SunDropTargetEvent event) {
if (event.getComponent().getDropTarget() == insideTarget) {
insideTarget = null;
super.processExitMessage(event);
}
}
private boolean processSunDropTargetEvent(SunDropTargetEvent event) {
Object source = event.getSource();
if (source instanceof Component) {
ComponentPeer peer = ((Component)source).getPeer();
if (peer instanceof XEmbedCanvasPeer) {
XEmbedCanvasPeer xEmbedCanvasPeer = (XEmbedCanvasPeer)peer;
/* The native context is the pointer to the XClientMessageEvent
structure. */
long ctxt = getNativeDragContext();
if (logger.isLoggable(PlatformLogger.Level.FINER)) {
logger.finer(" processing " + event + " ctxt=" + ctxt +
" consumed=" + event.isConsumed());
}
/* If the event is not consumed, pass it to the
XEmbedCanvasPeer for processing. */
if (!event.isConsumed()) {
// NOTE: ctxt can be zero at this point.
if (xEmbedCanvasPeer.processXEmbedDnDEvent(ctxt,
event.getID())) {
event.consume();
return true;
}
}
}
}
return false;
}
private boolean processSunDropTargetEvent(SunDropTargetEvent event) {
Object source = event.getSource();
if (source instanceof Component) {
ComponentPeer peer = ((Component)source).getPeer();
if (peer instanceof XEmbedCanvasPeer) {
XEmbedCanvasPeer xEmbedCanvasPeer = (XEmbedCanvasPeer)peer;
/* The native context is the pointer to the XClientMessageEvent
structure. */
long ctxt = getNativeDragContext();
if (logger.isLoggable(PlatformLogger.Level.FINER)) {
logger.finer(" processing " + event + " ctxt=" + ctxt +
" consumed=" + event.isConsumed());
}
/* If the event is not consumed, pass it to the
XEmbedCanvasPeer for processing. */
if (!event.isConsumed()) {
// NOTE: ctxt can be zero at this point.
if (xEmbedCanvasPeer.processXEmbedDnDEvent(ctxt,
event.getID())) {
event.consume();
return true;
}
}
}
}
return false;
}