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);
}
}
@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());
}
}
}
/**
* 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);
}
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);
}
@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);
}