private void layoutChildren() {
int offsetX = mPtrIndicator.getCurrentPosY();
int paddingLeft = getPaddingLeft();
int paddingTop = getPaddingTop();
if (mHeaderView != null) {
MarginLayoutParams lp = (MarginLayoutParams) mHeaderView.getLayoutParams();
final int left = paddingLeft + lp.leftMargin;
final int top = paddingTop + lp.topMargin + offsetX - mHeaderHeight;
final int right = left + mHeaderView.getMeasuredWidth();
final int bottom = top + mHeaderView.getMeasuredHeight();
mHeaderView.layout(left, top, right, bottom);
if (DEBUG && DEBUG_LAYOUT) {
PtrCLog.d(LOG_TAG, "onLayout header: %s %s %s %s", left, top, right, bottom);
}
}
if (mContent != null) {
if (isPinContent()) {
offsetX = 0;
}
MarginLayoutParams lp = (MarginLayoutParams) mContent.getLayoutParams();
final int left = paddingLeft + lp.leftMargin;
final int top = paddingTop + lp.topMargin + offsetX;
final int right = left + mContent.getMeasuredWidth();
final int bottom = top + mContent.getMeasuredHeight();
if (DEBUG && DEBUG_LAYOUT) {
PtrCLog.d(LOG_TAG, "onLayout content: %s %s %s %s", left, top, right, bottom);
}
mContent.layout(left, top, right, bottom);
}
}
/**
* Call this when data is loaded. The UI will perform complete at once or after a delay, depends
* on the time elapsed is greater then {@link #mLoadingMinTime} or not.
*/
public final void refreshComplete() {
if (DEBUG) {
PtrCLog.i(LOG_TAG, "refreshComplete");
}
if (mRefreshCompleteHook != null) {
mRefreshCompleteHook.reset();
}
int delay = (int) (mLoadingMinTime - (System.currentTimeMillis() - mLoadingStartTime));
if (delay <= 0) {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "performRefreshComplete at once");
}
performRefreshComplete();
} else {
postDelayed(
new Runnable() {
@Override
public void run() {
performRefreshComplete();
}
},
delay);
if (DEBUG) {
PtrCLog.d(LOG_TAG, "performRefreshComplete after delay: %s", delay);
}
}
}
public void run() {
boolean finish = !mScroller.computeScrollOffset() || mScroller.isFinished();
int curY = mScroller.getCurrY();
int deltaY = curY - mLastFlingY;
if (DEBUG) {
if (deltaY != 0) {
PtrCLog.v(
LOG_TAG,
"scroll: %s, start: %s, to: %s, currentPos: %s, current :%s, last: %s, delta: %s",
finish,
mStart,
mTo,
mPtrIndicator.getCurrentPosY(),
curY,
mLastFlingY,
deltaY);
}
}
if (!finish) {
mLastFlingY = curY;
movePos(deltaY);
post(this);
} else {
finish();
}
}
private void finish() {
if (DEBUG) {
PtrCLog.v(LOG_TAG, "finish, currentPos:%s", mPtrIndicator.getCurrentPosY());
}
reset();
onPtrScrollFinish();
}
protected void onPtrScrollFinish() {
if (mPtrIndicator.hasLeftStartPosition() && isAutoRefresh()) {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "call onRelease after scroll finish");
}
onRelease(true);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (DEBUG && DEBUG_LAYOUT) {
PtrCLog.d(
LOG_TAG,
"onMeasure frame: width: %s, height: %s, padding: %s %s %s %s",
getMeasuredHeight(),
getMeasuredWidth(),
getPaddingLeft(),
getPaddingRight(),
getPaddingTop(),
getPaddingBottom());
}
if (mHeaderView != null) {
measureChildWithMargins(mHeaderView, widthMeasureSpec, 0, heightMeasureSpec, 0);
MarginLayoutParams lp = (MarginLayoutParams) mHeaderView.getLayoutParams();
mHeaderHeight = mHeaderView.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;
mPtrIndicator.setHeaderHeight(mHeaderHeight);
}
if (mContent != null) {
measureContentView(mContent, widthMeasureSpec, heightMeasureSpec);
if (DEBUG && DEBUG_LAYOUT) {
ViewGroup.MarginLayoutParams lp = (MarginLayoutParams) mContent.getLayoutParams();
PtrCLog.d(
LOG_TAG,
"onMeasure content, width: %s, height: %s, margin: %s %s %s %s",
getMeasuredWidth(),
getMeasuredHeight(),
lp.leftMargin,
lp.topMargin,
lp.rightMargin,
lp.bottomMargin);
PtrCLog.d(
LOG_TAG,
"onMeasure, currentPos: %s, lastPos: %s, top: %s",
mPtrIndicator.getCurrentPosY(),
mPtrIndicator.getLastPosY(),
mContent.getTop());
}
}
}
private void performRefresh() {
mLoadingStartTime = System.currentTimeMillis();
if (mPtrUIHandlerHolder.hasHandler()) {
mPtrUIHandlerHolder.onUIRefreshBegin(this);
if (DEBUG) {
PtrCLog.i(LOG_TAG, "PtrUIHandler: onUIRefreshBegin");
}
}
if (mPtrHandler != null) {
mPtrHandler.onRefreshBegin(this);
}
}
/**
* if deltaY > 0, move the content down
*
* @param deltaY
*/
private void movePos(float deltaY) {
// has reached the top
if ((deltaY < 0 && mPtrIndicator.isInStartPosition())) {
if (DEBUG) {
PtrCLog.e(LOG_TAG, String.format("has reached the top"));
}
return;
}
int to = mPtrIndicator.getCurrentPosY() + (int) deltaY;
// over top
if (mPtrIndicator.willOverTop(to)) {
if (DEBUG) {
PtrCLog.e(LOG_TAG, String.format("over top"));
}
to = PtrIndicator.POS_START;
}
mPtrIndicator.setCurrentPos(to);
int change = to - mPtrIndicator.getLastPosY();
updatePos(change);
}
/**
* Do real refresh work. If there is a hook, execute the hook first.
*
* @param ignoreHook
*/
private void notifyUIRefreshComplete(boolean ignoreHook) {
/**
* After hook operation is done, {@link #notifyUIRefreshComplete} will be call in resume action
* to ignore hook.
*/
if (mPtrIndicator.hasLeftStartPosition() && !ignoreHook && mRefreshCompleteHook != null) {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "notifyUIRefreshComplete mRefreshCompleteHook run.");
}
mRefreshCompleteHook.takeOver();
return;
}
if (mPtrUIHandlerHolder.hasHandler()) {
if (DEBUG) {
PtrCLog.i(LOG_TAG, "PtrUIHandler: onUIRefreshComplete");
}
mPtrUIHandlerHolder.onUIRefreshComplete(this);
}
mPtrIndicator.onUIRefreshComplete();
tryScrollBackToTopAfterComplete();
tryToNotifyReset();
}
/** If at the top and not in loading, reset */
private boolean tryToNotifyReset() {
if ((mStatus == PTR_STATUS_COMPLETE || mStatus == PTR_STATUS_PREPARE)
&& mPtrIndicator.isInStartPosition()) {
if (mPtrUIHandlerHolder.hasHandler()) {
mPtrUIHandlerHolder.onUIReset(this);
if (DEBUG) {
PtrCLog.i(LOG_TAG, "PtrUIHandler: onUIReset");
}
}
mStatus = PTR_STATUS_INIT;
clearFlag();
return true;
}
return false;
}
private void sendDownEvent() {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "send down event");
}
final MotionEvent last = mLastMoveEvent;
MotionEvent e =
MotionEvent.obtain(
last.getDownTime(),
last.getEventTime(),
MotionEvent.ACTION_DOWN,
last.getX(),
last.getY(),
last.getMetaState());
dispatchTouchEventSupper(e);
}
private void sendCancelEvent() {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "send cancel event");
}
MotionEvent last = mDownEvent;
last = mLastMoveEvent;
MotionEvent e =
MotionEvent.obtain(
last.getDownTime(),
last.getEventTime() + ViewConfiguration.getLongPressTimeout(),
MotionEvent.ACTION_CANCEL,
last.getX(),
last.getY(),
last.getMetaState());
dispatchTouchEventSupper(e);
}
/** Do refresh complete work when time elapsed is greater than {@link #mLoadingMinTime} */
private void performRefreshComplete() {
mStatus = PTR_STATUS_COMPLETE;
// if is auto refresh do nothing, wait scroller stop
if (mScrollChecker.mIsRunning && isAutoRefresh()) {
// do nothing
if (DEBUG) {
PtrCLog.d(
LOG_TAG,
"performRefreshComplete do nothing, scrolling: %s, auto refresh: %s",
mScrollChecker.mIsRunning,
mFlag);
}
return;
}
notifyUIRefreshComplete(false);
}
private void sendCancelEvent() {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "send cancel event");
}
// The ScrollChecker will update position and lead to send cancel event when mLastMoveEvent is
// null.
// fix #104, #80, #92
if (mLastMoveEvent == null) {
return;
}
MotionEvent last = mLastMoveEvent;
MotionEvent e =
MotionEvent.obtain(
last.getDownTime(),
last.getEventTime() + ViewConfiguration.getLongPressTimeout(),
MotionEvent.ACTION_CANCEL,
last.getX(),
last.getY(),
last.getMetaState());
dispatchTouchEventSupper(e);
}
public void autoRefresh(boolean atOnce, int duration) {
if (mStatus != PTR_STATUS_INIT) {
return;
}
mFlag |= atOnce ? FLAG_AUTO_REFRESH_AT_ONCE : FLAG_AUTO_REFRESH_BUT_LATER;
mStatus = PTR_STATUS_PREPARE;
if (mPtrUIHandlerHolder.hasHandler()) {
mPtrUIHandlerHolder.onUIRefreshPrepare(this);
if (DEBUG) {
PtrCLog.i(LOG_TAG, "PtrUIHandler: onUIRefreshPrepare, mFlag %s", mFlag);
}
}
mScrollChecker.tryToScrollTo(mPtrIndicator.getOffsetToRefresh(), duration);
if (atOnce) {
mStatus = PTR_STATUS_LOADING;
performRefresh();
}
}
public void tryToScrollTo(int to, int duration) {
if (mPtrIndicator.isAlreadyHere(to)) {
return;
}
mStart = mPtrIndicator.getCurrentPosY();
mTo = to;
int distance = to - mStart;
if (DEBUG) {
PtrCLog.d(LOG_TAG, "tryToScrollTo: start: %s, distance:%s, to:%s", mStart, distance, to);
}
removeCallbacks(this);
mLastFlingY = 0;
// fix #47: Scroller should be reused,
// https://github.com/liaohuqiu/android-Ultra-Pull-To-Refresh/issues/47
if (!mScroller.isFinished()) {
mScroller.forceFinished(true);
}
mScroller.startScroll(0, 0, 0, distance, duration);
post(this);
mIsRunning = true;
}
@Override
public boolean dispatchTouchEvent(MotionEvent e) {
if (!isEnabled() || mContent == null || mHeaderView == null) {
return dispatchTouchEventSupper(e);
}
int action = e.getAction();
switch (action) {
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
mPtrIndicator.onRelease();
if (mPtrIndicator.hasLeftStartPosition()) {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "call onRelease when user release");
}
onRelease(false);
if (mPtrIndicator.hasMovedAfterPressedDown()) {
sendCancelEvent();
return true;
}
return dispatchTouchEventSupper(e);
} else {
return dispatchTouchEventSupper(e);
}
case MotionEvent.ACTION_DOWN:
mHasSendCancelEvent = false;
mPtrIndicator.onPressDown(e.getX(), e.getY());
mScrollChecker.abortIfWorking();
mPreventForHorizontal = false;
// The cancel event will be sent once the position is moved.
// So let the event pass to children.
// fix #93, #102
dispatchTouchEventSupper(e);
return true;
case MotionEvent.ACTION_MOVE:
mLastMoveEvent = e;
mPtrIndicator.onMove(e.getX(), e.getY());
float offsetX = mPtrIndicator.getOffsetX();
float offsetY = mPtrIndicator.getOffsetY();
if (mDisableWhenHorizontalMove
&& !mPreventForHorizontal
&& (Math.abs(offsetX) > mPagingTouchSlop && Math.abs(offsetX) > Math.abs(offsetY))) {
if (mPtrIndicator.isInStartPosition()) {
mPreventForHorizontal = true;
}
}
if (mPreventForHorizontal) {
return dispatchTouchEventSupper(e);
}
boolean moveDown = offsetY > 0;
boolean moveUp = !moveDown;
boolean canMoveUp = mPtrIndicator.hasLeftStartPosition();
if (DEBUG) {
boolean canMoveDown =
mPtrHandler != null && mPtrHandler.checkCanDoRefresh(this, mContent, mHeaderView);
PtrCLog.v(
LOG_TAG,
"ACTION_MOVE: offsetY:%s, currentPos: %s, moveUp: %s, canMoveUp: %s, moveDown: %s: canMoveDown: %s",
offsetY,
mPtrIndicator.getCurrentPosY(),
moveUp,
canMoveUp,
moveDown,
canMoveDown);
}
// disable move when header not reach top
if (moveDown
&& mPtrHandler != null
&& !mPtrHandler.checkCanDoRefresh(this, mContent, mHeaderView)) {
return dispatchTouchEventSupper(e);
}
if ((moveUp && canMoveUp) || moveDown) {
movePos(offsetY);
return true;
}
}
return dispatchTouchEventSupper(e);
}
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);
}