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Track input state when transferring touch focus.

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Copies the input state to the destination window and sends synthesic
cancelation events to the source window.

Change-Id: Ia75820b0d756ed5d6cd22dce7830251ac85141ed
This commit is contained in:
Jeff Brown
2010-10-11 18:32:20 -07:00
parent e20c9e0264
commit 9c9f1a3ba1
3 changed files with 33 additions and 2 deletions
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30
libs/ui/InputDispatcher.cpp
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@ -2668,6 +2668,18 @@ bool InputDispatcher::transferTouchFocus(const sp<InputChannel>& fromChannel,
return false;
}
ssize_t fromConnectionIndex = getConnectionIndexLocked(fromChannel);
ssize_t toConnectionIndex = getConnectionIndexLocked(toChannel);
if (fromConnectionIndex >= 0 && toConnectionIndex >= 0) {
sp<Connection> fromConnection = mConnectionsByReceiveFd.valueAt(fromConnectionIndex);
sp<Connection> toConnection = mConnectionsByReceiveFd.valueAt(toConnectionIndex);
fromConnection->inputState.copyPointerStateTo(toConnection->inputState);
synthesizeCancelationEventsForConnectionLocked(fromConnection,
InputState::CANCEL_POINTER_EVENTS,
"transferring touch focus from this window to another window");
}
#if DEBUG_FOCUS
logDispatchStateLocked();
#endif
@ -3404,6 +3416,24 @@ void InputDispatcher::InputState::clear() {
mMotionMementos.clear();
}
void InputDispatcher::InputState::copyPointerStateTo(InputState& other) const {
for (size_t i = 0; i < mMotionMementos.size(); i++) {
const MotionMemento& memento = mMotionMementos.itemAt(i);
if (memento.source & AINPUT_SOURCE_CLASS_POINTER) {
for (size_t j = 0; j < other.mMotionMementos.size(); ) {
const MotionMemento& otherMemento = other.mMotionMementos.itemAt(j);
if (memento.deviceId == otherMemento.deviceId
&& memento.source == otherMemento.source) {
other.mMotionMementos.removeAt(j);
} else {
j += 1;
}
}
other.mMotionMementos.push(memento);
}
}
}
bool InputDispatcher::InputState::shouldCancelEvent(int32_t eventSource,
CancelationOptions options) {
switch (options) {