package com.sxjs.common.widget.pulltorefresh;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.Scroller;
import android.widget.TextView;
import com.sxjs.common.R;
import com.sxjs.common.widget.pulltorefresh.indicator.PtrIndicator;
import com.sxjs.common.widget.pulltorefresh.util.PtrCLog;
/**
* This layout view for "Pull to Refresh(Ptr)" support all of the view, you can contain everything you want.
* support: pull to refresh / release to refresh / auto refresh / keep header view while refreshing / hide header view while refreshing
* It defines {@link PtrUIHandler}, which allows you customize the UI easily.
*/
public class PtrFrameLayout extends ViewGroup {
// status enum
public final static byte PTR_STATUS_INIT = 1;
private byte mStatus = PTR_STATUS_INIT;
public final static byte PTR_STATUS_PREPARE = 2;
public final static byte PTR_STATUS_LOADING = 3;
public final static byte PTR_STATUS_COMPLETE = 4;
private static final boolean DEBUG_LAYOUT = true;
public static boolean DEBUG = false;
private static int ID = 1;
protected final String LOG_TAG = "ptr-frame-" + ++ID;
// auto refresh status
private final static byte FLAG_AUTO_REFRESH_AT_ONCE = 0x01;
private final static byte FLAG_AUTO_REFRESH_BUT_LATER = 0x01 << 1;
private final static byte FLAG_ENABLE_NEXT_PTR_AT_ONCE = 0x01 << 2;
private final static byte FLAG_PIN_CONTENT = 0x01 << 3;
private final static byte MASK_AUTO_REFRESH = 0x03;
protected View mContent;
// optional config for define header and content in xml file
private int mHeaderId = 0;
private int mContainerId = 0;
// config
private int mDurationToClose = 200;
private int mDurationToCloseHeader = 1000;
private boolean mKeepHeaderWhenRefresh = true;
private boolean mPullToRefresh = false;
private View mHeaderView;
private PtrUIHandlerHolder mPtrUIHandlerHolder = PtrUIHandlerHolder.create();
private PtrHandler mPtrHandler;
// working parameters
private ScrollChecker mScrollChecker;
private int mPagingTouchSlop;
private int mHeaderHeight;
private boolean mDisableWhenHorizontalMove = true;
private int mFlag = 0x00;
// disable when detect moving horizontally
private boolean mPreventForHorizontal = false;
private MotionEvent mLastMoveEvent;
private PtrUIHandlerHook mRefreshCompleteHook;
private int mLoadingMinTime = 500;
private long mLoadingStartTime = 0;
protected PtrIndicator mPtrIndicator;
private boolean mHasSendCancelEvent = false;
private Runnable mPerformRefreshCompleteDelay = new Runnable() {
@Override
public void run() {
performRefreshComplete();
}
};
public PtrFrameLayout(Context context) {
this(context, null);
}
public PtrFrameLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public PtrFrameLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mPtrIndicator = new PtrIndicator();
TypedArray arr = context.obtainStyledAttributes(attrs, R.styleable.PtrFrameLayout, 0, 0);
if (arr != null) {
mHeaderId = arr.getResourceId(R.styleable.PtrFrameLayout_ptr_header, mHeaderId);
mContainerId = arr.getResourceId(R.styleable.PtrFrameLayout_ptr_content, mContainerId);
mPtrIndicator.setResistance(
arr.getFloat(R.styleable.PtrFrameLayout_ptr_resistance, mPtrIndicator.getResistance()));
mDurationToClose = arr.getInt(R.styleable.PtrFrameLayout_ptr_duration_to_close, mDurationToClose);
mDurationToCloseHeader = arr.getInt(R.styleable.PtrFrameLayout_ptr_duration_to_close_header, mDurationToCloseHeader);
float ratio = mPtrIndicator.getRatioOfHeaderToHeightRefresh();
ratio = arr.getFloat(R.styleable.PtrFrameLayout_ptr_ratio_of_header_height_to_refresh, ratio);
mPtrIndicator.setRatioOfHeaderHeightToRefresh(ratio);
mKeepHeaderWhenRefresh = arr.getBoolean(R.styleable.PtrFrameLayout_ptr_keep_header_when_refresh, mKeepHeaderWhenRefresh);
mPullToRefresh = arr.getBoolean(R.styleable.PtrFrameLayout_ptr_pull_to_fresh, mPullToRefresh);
arr.recycle();
}
mScrollChecker = new ScrollChecker();
final ViewConfiguration conf = ViewConfiguration.get(getContext());
mPagingTouchSlop = conf.getScaledTouchSlop() * 2;
//mPagingTouchSlop = 0;
}
@Override
protected void onFinishInflate() {
final int childCount = getChildCount();
if (childCount > 2) {
throw new IllegalStateException("PtrFrameLayout can only contains 2 children");
} else if (childCount == 2) {
if (mHeaderId != 0 && mHeaderView == null) {
mHeaderView = findViewById(mHeaderId);
}
if (mContainerId != 0 && mContent == null) {
mContent = findViewById(mContainerId);
}
// not specify header or content
if (mContent == null || mHeaderView == null) {
View child1 = getChildAt(0);
View child2 = getChildAt(1);
if (child1 instanceof PtrUIHandler) {
mHeaderView = child1;
mContent = child2;
} else if (child2 instanceof PtrUIHandler) {
mHeaderView = child2;
mContent = child1;
} else {
// both are not specified
if (mContent == null && mHeaderView == null) {
mHeaderView = child1;
mContent = child2;
}
// only one is specified
else {
if (mHeaderView == null) {
mHeaderView = mContent == child1 ? child2 : child1;
} else {
mContent = mHeaderView == child1 ? child2 : child1;
}
}
}
}
} else if (childCount == 1) {
mContent = getChildAt(0);
} else {
TextView errorView = new TextView(getContext());
errorView.setClickable(true);
errorView.setTextColor(0xffff6600);
errorView.setGravity(Gravity.CENTER);
errorView.setTextSize(20);
errorView.setText("The content view in PtrFrameLayout is empty. Do you forget to specify its id in xml layout file?");
mContent = errorView;
addView(mContent);
}
if (mHeaderView != null) {
mHeaderView.bringToFront();
}
super.onFinishInflate();
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (mScrollChecker != null) {
mScrollChecker.destroy();
}
if (mPerformRefreshCompleteDelay != null) {
removeCallbacks(mPerformRefreshCompleteDelay);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (isDebug()) {
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 (isDebug()) {
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 measureContentView(View child,
int parentWidthMeasureSpec,
int parentHeightMeasureSpec) {
final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec,
getPaddingLeft() + getPaddingRight() + lp.leftMargin + lp.rightMargin, lp.width);
final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec,
getPaddingTop() + getPaddingBottom() + lp.topMargin, lp.height);
child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
}
@Override
protected void onLayout(boolean flag, int i, int j, int k, int l) {
layoutChildren();
}
private void layoutChildren() {
int offset = mPtrIndicator.getCurrentPosY();
int paddingLeft = getPaddingLeft();
int paddingTop = getPaddingTop();
if (mHeaderView != null) {
MarginLayoutParams lp = (MarginLayoutParams) mHeaderView.getLayoutParams();
final int left = paddingLeft + lp.leftMargin;
// enhance readability(header is layout above screen when first init)
final int top = -(mHeaderHeight - paddingTop - lp.topMargin - offset);
final int right = left + mHeaderView.getMeasuredWidth();
final int bottom = top + mHeaderView.getMeasuredHeight();
mHeaderView.layout(left, top, right, bottom);
if (isDebug()) {
PtrCLog.d(LOG_TAG, "onLayout header: %s %s %s %s", left, top, right, bottom);
}
}
if (mContent != null) {
if (isPinContent()) {
offset = 0;
}
MarginLayoutParams lp = (MarginLayoutParams) mContent.getLayoutParams();
final int left = paddingLeft + lp.leftMargin;
final int top = paddingTop + lp.topMargin + offset;
final int right = left + mContent.getMeasuredWidth();
final int bottom = top + mContent.getMeasuredHeight();
if (isDebug()) {
PtrCLog.d(LOG_TAG, "onLayout content: %s %s %s %s", left, top, right, bottom);
}
mContent.layout(left, top, right, bottom);
}
}
@SuppressWarnings({"PointlessBooleanExpression", "ConstantConditions"})
private boolean isDebug() {
return DEBUG && DEBUG_LAYOUT;
}
public boolean dispatchTouchEventSupper(MotionEvent e) {
return super.dispatchTouchEvent(e);
}
private float startX; //记录初始坐标
private float startY;
private boolean canNotScrollOver = false;
private boolean pullHeaderCanNotScrollOver = false;
@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()) {
onRelease(false);
if (mPtrIndicator.hasMovedAfterPressedDown()) {
sendCancelEvent();
return true;
}
return dispatchTouchEventSupper(e);
} else {
return dispatchTouchEventSupper(e);
}
case MotionEvent.ACTION_DOWN:
canNotScrollOver = false;
pullHeaderCanNotScrollOver = false;
mHasSendCancelEvent = false;
startX = e.getX();
startY = e.getY();
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:
float diffX = e.getX() - startX;
float diffY = e.getY() - startY;
mLastMoveEvent = e;
mPtrIndicator.onMove(e.getX(), e.getY());
//float offsetX = mPtrIndicator.getOffsetX();
float offsetY = mPtrIndicator.getOffsetY();
boolean moveDown = offsetY > 0;
boolean moveUp = !moveDown;
//判断当前为mContent向上滑动或者可以向上滑动时 设置mContent只能在回到顶部后重新进行下拉刷新动作
if( diffY < 0 && Math.abs(diffY) > mPagingTouchSlop || !PtrDefaultHandler.checkContentCanBePulledDown(this, mContent, mHeaderView))
canNotScrollOver = true;
//判断头部局为下拉动作时 设置头布局只允许回到初始位置
if(mPtrIndicator.getCurrentPosY() > mPagingTouchSlop && PtrDefaultHandler.checkContentCanBePulledDown(this, mContent, mHeaderView))
pullHeaderCanNotScrollOver = true;
//此处配置为当拉动头布局进行刷新时，头布局只允许回到初始位置 且 mContent无法获取该Event
if(!moveDown && pullHeaderCanNotScrollOver && mPtrIndicator.getCurrentPosY() == 0 )return true;
//此处判断是否x轴滑动距离大于y轴滑动距离 且 当前使用者是否同意此时由mContent获取该Event
if (mDisableWhenHorizontalMove && !mPreventForHorizontal && (Math.abs(diffX) > (mPagingTouchSlop / 3) && Math.abs(diffX) > Math.abs(diffY))) {
if (mPtrIndicator.isInStartPosition()) {
mPreventForHorizontal = true;
}
}
//此处解决水平滑动冲突 或 mContent向下滑动或者已经滑动了一定距离时则在该次触摸动作离开屏幕前不可以向下拉动头布局进行刷新动作
if (mPreventForHorizontal || (moveDown && PtrDefaultHandler.checkContentCanBePulledDown(this, mContent, mHeaderView) && canNotScrollOver && !pullHeaderCanNotScrollOver)) {
return dispatchTouchEventSupper(e);
}
boolean canMoveUp = mPtrIndicator.hasLeftStartPosition();
// disable move when header not reach top
if (moveDown && !PtrDefaultHandler.checkContentCanBePulledDown(this, mContent, mHeaderView)) {
return dispatchTouchEventSupper(e);
}
if ((moveUp && canMoveUp) || moveDown) {
movePos(offsetY);
return true;
}
}
return dispatchTouchEventSupper(e);
}
/**
* 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);
}
protected void onPositionChange(boolean isInTouching, byte status, PtrIndicator mPtrIndicator) {
}
@SuppressWarnings("unused")
public int getHeaderHeight() {
return mHeaderHeight;
}
private void onRelease(boolean stayForLoading) {
tryToPerformRefresh();
if (mStatus == PTR_STATUS_LOADING) {
// keep header for fresh
if (mKeepHeaderWhenRefresh) {
// scroll header back
if (mPtrIndicator.isOverOffsetToKeepHeaderWhileLoading() && !stayForLoading) {
mScrollChecker.tryToScrollTo(mPtrIndicator.getOffsetToKeepHeaderWhileLoading(), mDurationToClose);
} else {
// do nothing
}
} else {
tryScrollBackToTopWhileLoading();
}
} else {
if (mStatus == PTR_STATUS_COMPLETE) {
notifyUIRefreshComplete(false);
} else {
tryScrollBackToTopAbortRefresh();
}
}
}
/**
* please DO REMEMBER resume the hook
*
* @param hook
*/
public void setRefreshCompleteHook(PtrUIHandlerHook hook) {
mRefreshCompleteHook = hook;
hook.setResumeAction(new Runnable() {
@Override
public void run() {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "mRefreshCompleteHook resume.");
}
notifyUIRefreshComplete(true);
}
});
}
/**
* Scroll back to to if is not under touch
*/
private void tryScrollBackToTop() {
if (!mPtrIndicator.isUnderTouch()) {
mScrollChecker.tryToScrollTo(PtrIndicator.POS_START, mDurationToCloseHeader);
}
}
/**
* just make easier to understand
*/
private void tryScrollBackToTopWhileLoading() {
tryScrollBackToTop();
}
/**
* just make easier to understand
*/
private void tryScrollBackToTopAfterComplete() {
tryScrollBackToTop();
}
/**
* just make easier to understand
*/
private void tryScrollBackToTopAbortRefresh() {
tryScrollBackToTop();
}
private boolean tryToPerformRefresh() {
if (mStatus != PTR_STATUS_PREPARE) {
return false;
}
//
if ((mPtrIndicator.isOverOffsetToKeepHeaderWhileLoading() && isAutoRefresh()) || mPtrIndicator.isOverOffsetToRefresh()) {
mStatus = PTR_STATUS_LOADING;
performRefresh();
}
return false;
}
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 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;
}
protected void onPtrScrollAbort() {
if (mPtrIndicator.hasLeftStartPosition() && isAutoRefresh()) {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "call onRelease after scroll abort");
}
onRelease(true);
}
}
protected void onPtrScrollFinish() {
if (mPtrIndicator.hasLeftStartPosition() && isAutoRefresh()) {
if (DEBUG) {
PtrCLog.d(LOG_TAG, "call onRelease after scroll finish");
}
onRelease(true);
}
}
/**
* Detect whether is refreshing.
*
* @return
*/
public boolean isRefreshing() {
return mStatus == PTR_STATUS_LOADING;
}
/**
* 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.
*/
final public 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(mPerformRefreshCompleteDelay, delay);
if (DEBUG) {
PtrCLog.d(LOG_TAG, "performRefreshComplete after delay: %s", delay);
}
}
}
/**
* 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);
}
/**
* 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();
}
public void autoRefresh() {
autoRefresh(true, mDurationToCloseHeader);
}
public void autoRefresh(boolean atOnce) {
autoRefresh(atOnce, mDurationToCloseHeader);
}
private void clearFlag() {
// remove auto fresh flag
mFlag = mFlag & ~MASK_AUTO_REFRESH;
}
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 boolean isAutoRefresh() {
return (mFlag & MASK_AUTO_REFRESH) > 0;
}
private boolean performAutoRefreshButLater() {
return (mFlag & MASK_AUTO_REFRESH) == FLAG_AUTO_REFRESH_BUT_LATER;
}
public boolean isEnabledNextPtrAtOnce() {
return (mFlag & FLAG_ENABLE_NEXT_PTR_AT_ONCE) > 0;
}
/**
* If @param enable has been set to true. The user can perform next PTR at once.
*
* @param enable
*/
public void setEnabledNextPtrAtOnce(boolean enable) {
if (enable) {
mFlag = mFlag | FLAG_ENABLE_NEXT_PTR_AT_ONCE;
} else {
mFlag = mFlag & ~FLAG_ENABLE_NEXT_PTR_AT_ONCE;
}
}
public boolean isPinContent() {
return (mFlag & FLAG_PIN_CONTENT) > 0;
}
/**
* The content view will now move when {@param pinContent} set to true.
*
* @param pinContent
*/
public void setPinContent(boolean pinContent) {
if (pinContent) {
mFlag = mFlag | FLAG_PIN_CONTENT;
} else {
mFlag = mFlag & ~FLAG_PIN_CONTENT;
}
}
/**
* It's useful when working with viewpager.
*
* @param disable
*/
public void disableWhenHorizontalMove(boolean disable) {
mDisableWhenHorizontalMove = disable;
}
/**
* loading will last at least for so long
*
* @param time
*/
public void setLoadingMinTime(int time) {
mLoadingMinTime = time;
}
/**
* Not necessary any longer. Once moved, cancel event will be sent to child.
*
* @param yes
*/
@Deprecated
public void setInterceptEventWhileWorking(boolean yes) {
}
@SuppressWarnings({"unused"})
public View getContentView() {
return mContent;
}
public void setPtrHandler(PtrHandler ptrHandler) {
mPtrHandler = ptrHandler;
}
public void addPtrUIHandler(PtrUIHandler ptrUIHandler) {
PtrUIHandlerHolder.addHandler(mPtrUIHandlerHolder, ptrUIHandler);
}
@SuppressWarnings({"unused"})
public void removePtrUIHandler(PtrUIHandler ptrUIHandler) {
mPtrUIHandlerHolder = PtrUIHandlerHolder.removeHandler(mPtrUIHandlerHolder, ptrUIHandler);
}
public void setPtrIndicator(PtrIndicator slider) {
if (mPtrIndicator != null && mPtrIndicator != slider) {
slider.convertFrom(mPtrIndicator);
}
mPtrIndicator = slider;
}
@SuppressWarnings({"unused"})
public float getResistance() {
return mPtrIndicator.getResistance();
}
public void setResistance(float resistance) {
mPtrIndicator.setResistance(resistance);
}
@SuppressWarnings({"unused"})
public float getDurationToClose() {
return mDurationToClose;
}
/**
* The duration to return back to the refresh position
*
* @param duration
*/
public void setDurationToClose(int duration) {
mDurationToClose = duration;
}
@SuppressWarnings({"unused"})
public long getDurationToCloseHeader() {
return mDurationToCloseHeader;
}
/**
* The duration to close time
*
* @param duration
*/
public void setDurationToCloseHeader(int duration) {
mDurationToCloseHeader = duration;
}
public void setRatioOfHeaderHeightToRefresh(float ratio) {
mPtrIndicator.setRatioOfHeaderHeightToRefresh(ratio);
}
public int getOffsetToRefresh() {
return mPtrIndicator.getOffsetToRefresh();
}
@SuppressWarnings({"unused"})
public void setOffsetToRefresh(int offset) {
mPtrIndicator.setOffsetToRefresh(offset);
}
@SuppressWarnings({"unused"})
public float getRatioOfHeaderToHeightRefresh() {
return mPtrIndicator.getRatioOfHeaderToHeightRefresh();
}
@SuppressWarnings({"unused"})
public int getOffsetToKeepHeaderWhileLoading() {
return mPtrIndicator.getOffsetToKeepHeaderWhileLoading();
}
@SuppressWarnings({"unused"})
public void setOffsetToKeepHeaderWhileLoading(int offset) {
mPtrIndicator.setOffsetToKeepHeaderWhileLoading(offset);
}
@SuppressWarnings({"unused"})
public boolean isKeepHeaderWhenRefresh() {
return mKeepHeaderWhenRefresh;
}
public void setKeepHeaderWhenRefresh(boolean keepOrNot) {
mKeepHeaderWhenRefresh = keepOrNot;
}
public boolean isPullToRefresh() {
return mPullToRefresh;
}
public void setPullToRefresh(boolean pullToRefresh) {
mPullToRefresh = pullToRefresh;
}
@SuppressWarnings({"unused"})
public View getHeaderView() {
return mHeaderView;
}
public void setHeaderView(View header) {
if (mHeaderView != null && header != null && mHeaderView != header) {
removeView(mHeaderView);
}
ViewGroup.LayoutParams lp = header.getLayoutParams();
if (lp == null) {
lp = new LayoutParams(-1, -2);
header.setLayoutParams(lp);
}
mHeaderView = header;
addView(header);
}
@Override
protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
return p != null && p instanceof LayoutParams;
}
@Override
protected ViewGroup.LayoutParams generateDefaultLayoutParams() {
return new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
}
@Override
protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
return new LayoutParams(p);
}
@Override
public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) {
return new LinearLayout.LayoutParams(getContext(), attrs);
}
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);
}
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);
}
public static class LayoutParams extends MarginLayoutParams {
public LayoutParams(Context c, AttributeSet attrs) {
super(c, attrs);
}
public LayoutParams(int width, int height) {
super(width, height);
}
@SuppressWarnings({"unused"})
public LayoutParams(MarginLayoutParams source) {
super(source);
}
public LayoutParams(ViewGroup.LayoutParams source) {
super(source);
}
}
class ScrollChecker implements Runnable {
private int mLastFlingY;
private Scroller mScroller;
private boolean mIsRunning = false;
private int mStart;
private int mTo;
public ScrollChecker() {
mScroller = new Scroller(getContext());
}
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();
}
private void reset() {
mIsRunning = false;
mLastFlingY = 0;
removeCallbacks(this);
}
private void destroy() {
reset();
if (!mScroller.isFinished()) {
mScroller.forceFinished(true);
}
}
public void abortIfWorking() {
if (mIsRunning) {
if (!mScroller.isFinished()) {
mScroller.forceFinished(true);
}
onPtrScrollAbort();
reset();
}
}
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;
}
}
}