private void updatePos(int change) {
if (change == 0) {
return;
}
boolean isUnderTouch = mPtrIndicator.isUnderTouch();
// once moved, cancel event will be sent to child
if (isUnderTouch && !mHasSendCancelEvent && mPtrIndicator.hasMovedAfterPressedDown()) {
mHasSendCancelEvent = true;
sendCancelEvent();
}
// leave initiated position or just refresh complete
if ((mPtrIndicator.hasJustLeftStartPosition() && mStatus == PTR_STATUS_INIT)
|| (mPtrIndicator.goDownCrossFinishPosition()
&& mStatus == PTR_STATUS_COMPLETE
&& isEnabledNextPtrAtOnce())) {
mStatus = PTR_STATUS_PREPARE;
mPtrUIHandlerHolder.onUIRefreshPrepare(this);
if (DEBUG) {
PtrCLog.i(LOG_TAG, "PtrUIHandler: onUIRefreshPrepare, mFlag %s", mFlag);
}
}
// back to initiated position
if (mPtrIndicator.hasJustBackToStartPosition()) {
tryToNotifyReset();
// recover event to children
if (isUnderTouch) {
sendDownEvent();
}
}
// Pull to Refresh
if (mStatus == PTR_STATUS_PREPARE) {
// reach fresh height while moving from top to bottom
if (isUnderTouch
&& !isAutoRefresh()
&& mPullToRefresh
&& mPtrIndicator.crossRefreshLineFromTopToBottom()) {
tryToPerformRefresh();
}
// reach header height while auto refresh
if (performAutoRefreshButLater()
&& mPtrIndicator.hasJustReachedHeaderHeightFromTopToBottom()) {
tryToPerformRefresh();
}
}
if (DEBUG) {
PtrCLog.v(
LOG_TAG,
"updatePos: change: %s, current: %s last: %s, top: %s, headerHeight: %s",
change,
mPtrIndicator.getCurrentPosY(),
mPtrIndicator.getLastPosY(),
mContent.getTop(),
mHeaderHeight);
}
mHeaderView.offsetTopAndBottom(change);
if (!isPinContent()) {
mContent.offsetTopAndBottom(change);
}
invalidate();
if (mPtrUIHandlerHolder.hasHandler()) {
mPtrUIHandlerHolder.onUIPositionChange(this, isUnderTouch, mStatus, mPtrIndicator);
}
onPositionChange(isUnderTouch, mStatus, mPtrIndicator);
}
