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am c0ef976e: am 14113e91: Revert TabLayoutOnPageChangeListener change

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* commit 'c0ef976e4adc5713daba4e843133da8fc74faf88':
  Revert TabLayoutOnPageChangeListener change

GitOrigin-RevId=6c7f48e3efe9ff9624b97fc61bc44c50e394a6be

PiperOrigin-RevId: 140549647
This commit is contained in:
Chris Banes 2016-11-30 01:27:31 +00:00 committed by Travis Collins
parent 73edc2db58
commit 4efbcae1fc
1 changed files with 17 additions and 17 deletions
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34
src/android/support/design/widget/TabLayout.java
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@ -1671,7 +1671,7 @@ public class TabLayout extends HorizontalScrollView {
*/
public static class TabLayoutOnPageChangeListener implements ViewPager.OnPageChangeListener {
private final WeakReference<TabLayout> mTabLayoutRef;
private int mPendingSelection = -1;
private int mPreviousScrollState;
private int mScrollState;
public TabLayoutOnPageChangeListener(TabLayout tabLayout) {
@ -1680,33 +1680,33 @@ public class TabLayout extends HorizontalScrollView {
@Override
public void onPageScrollStateChanged(int state) {
mPreviousScrollState = mScrollState;
mScrollState = state;
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
final TabLayout tabLayout = mTabLayoutRef.get();
if (tabLayout != null) {
if (mPendingSelection == -1 || tabLayout.getScrollPosition() != mPendingSelection) {
// If we don't have a pending selection, or the drawn position is not already
// at the selection, move the draw position
tabLayout.setScrollPosition(position, positionOffset, true);
}
if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
// As we're now idle, if we have a pending selection select it now
if (mPendingSelection != -1) {
tabLayout.selectTab(tabLayout.getTabAt(mPendingSelection));
mPendingSelection = -1;
}
}
// Update the scroll position, only update the text selection if we're being
// dragged (or we're settling after a drag)
final boolean updateText = (mScrollState == ViewPager.SCROLL_STATE_DRAGGING)
|| (mScrollState == ViewPager.SCROLL_STATE_SETTLING
&& mPreviousScrollState == ViewPager.SCROLL_STATE_DRAGGING);
tabLayout.setScrollPosition(position, positionOffset, updateText);
}
}
@Override
public void onPageSelected(int position) {
// This call is made before onPageScrolled() which can lead to a jerk if we just
// selected the tab now. So we'll keep the position, and set it when we're idle again
mPendingSelection = position;
final TabLayout tabLayout = mTabLayoutRef.get();
if (tabLayout != null) {
// Select the tab, only updating the indicator if we're not being dragged/settled
// (since onPageScrolled will handle that).
tabLayout.selectTab(tabLayout.getTabAt(position),
mScrollState == ViewPager.SCROLL_STATE_IDLE);
}
}
}