/** Activate automatic grab on first ButtonPress, deactivate on full mouse release */
public void handleButtonPressRelease(XEvent xev) {
XButtonEvent xbe = xev.get_xbutton();
final int buttonState =
xbe.get_state() & (Button1Mask | Button2Mask | Button3Mask | Button4Mask | Button5Mask);
switch (xev.get_type()) {
case ButtonPress:
if (buttonState == 0) {
XAwtState.setAutoGrabWindow(this);
}
break;
case ButtonRelease:
if (isFullRelease(buttonState, xbe.get_button())) {
XAwtState.setAutoGrabWindow(null);
}
break;
}
}
/**
* Dispatches event to the grab Window or event source window depending on whether the grab is
* active and on the event type
*/
static void dispatchToWindow(XEvent ev) {
XBaseWindow target = XAwtState.getGrabWindow();
if (target == null || !isGrabbedEvent(ev, target)) {
target = XToolkit.windowToXWindow(ev.get_xany().get_window());
}
if (target != null && target.checkInitialised()) {
target.dispatchEvent(ev);
}
}
static void ungrabInput() {
XToolkit.awtLock();
try {
XBaseWindow grabWindow = XAwtState.getGrabWindow();
if (grabLog.isLoggable(Level.FINE)) {
grabLog.log(Level.FINE, "UnGrab input on {0}", new Object[] {String.valueOf(grabWindow)});
}
if (grabWindow != null) {
grabWindow.ungrabInputImpl();
XlibWrapper.XUngrabPointer(XToolkit.getDisplay(), CurrentTime);
XlibWrapper.XUngrabKeyboard(XToolkit.getDisplay(), CurrentTime);
XAwtState.setGrabWindow(null);
// we need to call XFlush() here to force ungrab
// see 6384219 for details
XlibWrapper.XFlush(XToolkit.getDisplay());
}
} finally {
XToolkit.awtUnlock();
}
}
void destroy() {
XToolkit.awtLock();
try {
if (hints != null) {
XlibWrapper.XFree(hints.pData);
hints = null;
}
XToolkit.removeFromWinMap(getWindow(), this);
XlibWrapper.XDestroyWindow(XToolkit.getDisplay(), getWindow());
if (XPropertyCache.isCachingSupported()) {
XPropertyCache.clearCache(window);
}
window = -1;
if (!isDisposed()) {
setDisposed(true);
}
XAwtState
.getGrabWindow(); // Magic - getGrabWindow clear state if grabbing window is disposed of.
} finally {
XToolkit.awtUnlock();
}
}
/**
* We should always grab both keyboard and pointer to control event flow on popups. This also
* simplifies synthetic grab implementation. The active grab overrides activated automatic grab.
*/
public boolean grabInput() {
if (grabLog.isLoggable(Level.FINE)) {
grabLog.log(Level.FINE, "Grab input on {0}", new Object[] {String.valueOf(this)});
}
XToolkit.awtLock();
try {
if (XAwtState.getGrabWindow() == this && XAwtState.isManualGrab()) {
grabLog.fine(" Already Grabbed");
return true;
}
// 6273031: PIT. Choice drop down does not close once it is right clicked to show a popup menu
// remember previous window having grab and if it's not null ungrab it.
XBaseWindow prevGrabWindow = XAwtState.getGrabWindow();
final int eventMask =
(int)
(ButtonPressMask
| ButtonReleaseMask
| EnterWindowMask
| LeaveWindowMask
| PointerMotionMask
| ButtonMotionMask);
final int ownerEvents = 1;
int ptrGrab =
XlibWrapper.XGrabPointer(
XToolkit.getDisplay(),
getContentWindow(),
ownerEvents,
eventMask,
GrabModeAsync,
GrabModeAsync,
None,
(XWM.isMotif() ? XToolkit.arrowCursor : None),
CurrentTime);
// Check grab results to be consistent with X server grab
if (ptrGrab != GrabSuccess) {
XlibWrapper.XUngrabPointer(XToolkit.getDisplay(), CurrentTime);
XAwtState.setGrabWindow(null);
grabLog.fine(" Grab Failure - mouse");
return false;
}
int keyGrab =
XlibWrapper.XGrabKeyboard(
XToolkit.getDisplay(),
getContentWindow(),
ownerEvents,
GrabModeAsync,
GrabModeAsync,
CurrentTime);
if (keyGrab != GrabSuccess) {
XlibWrapper.XUngrabPointer(XToolkit.getDisplay(), CurrentTime);
XlibWrapper.XUngrabKeyboard(XToolkit.getDisplay(), CurrentTime);
XAwtState.setGrabWindow(null);
grabLog.fine(" Grab Failure - keyboard");
return false;
}
if (prevGrabWindow != null) {
prevGrabWindow.ungrabInputImpl();
}
XAwtState.setGrabWindow(this);
grabLog.fine(" Grab - success");
return true;
} finally {
XToolkit.awtUnlock();
}
}