Example usage for android.support.v4.view ViewCompat canScrollVertically

List of usage examples for android.support.v4.view ViewCompat canScrollVertically

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Introduction

In this page you can find the example usage for android.support.v4.view ViewCompat canScrollVertically.

Prototype

public static boolean canScrollVertically(View v, int direction)

Source Link

Document

Check if this view can be scrolled vertically in a certain direction.

Usage

From source file:xyz.openhh.compat.widget.CompatSwipeRefreshLayout.java

/**
 * ?
 *
 * @return
 */
private boolean canChildScrollUp() {

    return ViewCompat.canScrollVertically(mTargetView, -1);

}

From source file:xyz.openhh.compat.widget.CompatSwipeRefreshLayout.java

/**
 * ?
 *
 * @return
 */
private boolean canChildScrollDown() {

    return ViewCompat.canScrollVertically(mTargetView, 1);

}

From source file:android.support.design.widget.BottomSheetBehavior.java

@Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy,
        int[] consumed) {
    View scrollingChild = mNestedScrollingChildRef.get();
    if (target != scrollingChild) {
        return;/*from   ww w  .j  a  v  a 2 s  . c  o m*/
    }
    int currentTop = child.getTop();
    int newTop = currentTop - dy;
    if (dy > 0) { // Upward
        if (newTop < mMinOffset) {
            consumed[1] = currentTop - mMinOffset;
            ViewCompat.offsetTopAndBottom(child, -consumed[1]);
            setStateInternal(STATE_EXPANDED);
        } else {
            consumed[1] = dy;
            ViewCompat.offsetTopAndBottom(child, -dy);
            setStateInternal(STATE_DRAGGING);
        }
    } else if (dy < 0) { // Downward
        if (!ViewCompat.canScrollVertically(target, -1)) {
            if (newTop <= mMaxOffset || mHideable) {
                consumed[1] = dy;
                ViewCompat.offsetTopAndBottom(child, -dy);
                setStateInternal(STATE_DRAGGING);
            } else {
                consumed[1] = currentTop - mMaxOffset;
                ViewCompat.offsetTopAndBottom(child, -consumed[1]);
                setStateInternal(STATE_COLLAPSED);
            }
        }
    }
    dispatchOnSlide(child.getTop());
    mLastNestedScrollDy = dy;
    mNestedScrolled = true;
}

From source file:com.kuloud.android.unity.ui.widget.steprefresh.PullToRefreshView.java

private boolean canChildScrollUp() {
    return ViewCompat.canScrollVertically(mTarget, -1);
}

From source file:com.linsq.androiddemo.refresh2.SwipeRefreshLayout.java

public boolean canChildScrollUp() {
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            Logger.e("absListView.getChildAt(0).getTop()=" + absListView.getChildAt(0).getTop());
            return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else {//from  w  w  w  .  j ava  2  s.co  m
            return mTarget.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mTarget, -1);
    }
}

From source file:com.hayukleung.app.view.refresh.SwipeRefreshLayout.java

/**
 * @return Whether it is possible for the child view of this layout to
 * scroll up. Override this if the child view is a custom view.
 *//*  w w w  .jav a 2 s  .co m*/
public boolean canChildScrollUp() {
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else if (mTarget instanceof RecyclerView) {
            final RecyclerView recyclerView = (RecyclerView) mTarget;
            RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
            if (layoutManager instanceof LinearLayoutManager) {
                int position = ((LinearLayoutManager) layoutManager).findFirstCompletelyVisibleItemPosition();
                return position != 0;
            } else if (layoutManager instanceof StaggeredGridLayoutManager) {
                int[] positions = ((StaggeredGridLayoutManager) layoutManager)
                        .findFirstCompletelyVisibleItemPositions(null);
                for (int i = 0; i < positions.length; i++) {
                    if (positions[i] == 0) {
                        return false;
                    }
                }
            }
            return true;
        } else {
            return mTarget.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mTarget, -1);
    }
}

From source file:org.mozilla.gecko.widget.GeckoSwipeRefreshLayout.java

/**
 * @return Whether it is possible for the child view of this layout to
 *         scroll up. Override this if the child view is a custom view.
 *//*from  w w  w  .jav  a2  s. co  m*/
public boolean canChildScrollUp() {
    if (Versions.preICS) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else {
            return mTarget.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mTarget, -1);
    }
}

From source file:com.klinker.android.launcher.info_page.widgets.swipe_refresh_layout.OffsetSwipeRefreshLayout.java

/**
 * @return Whether it is possible for the child view of this layout to
 *         scroll up. Override this if the child view is a custom view.
 *//*w w  w . j  a  va 2s  .c  om*/
public boolean canChildScrollUp() {
    if (Build.VERSION.SDK_INT < 14) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else {
            return mTarget.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mTarget, -1);
    }
}

From source file:com.google.samples.apps.iosched.myschedule.MyScheduleActivity.java

@Override
public boolean canSwipeRefreshChildScrollUp() {
    if (mWideMode) {
        return ViewCompat.canScrollVertically(mScrollViewWide, -1);
    }//from   www  .  j a v a2 s .c  om

    // Prevent the swipe refresh by returning true here
    if (mViewPagerScrollState == ViewPager.SCROLL_STATE_DRAGGING) {
        return true;
    }

    for (MyScheduleFragment fragment : mMyScheduleFragments) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
            if (!fragment.getUserVisibleHint()) {
                continue;
            }
        }

        return ViewCompat.canScrollVertically(fragment.getListView(), -1);
    }

    return false;
}

From source file:com.matcontrol.control.BottomSheetBehavior_v25.java

@Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy,
        int[] consumed) {
    if (!isOneOfChild(target)) {
        return;//from w  w w  . ja v a2  s. c  o m
    }

    //        View scrollingChild = mNestedScrollingChildRef.get();
    //        if (target != scrollingChild) {
    //            return;
    //        }

    int currentTop = child.getTop();
    int newTop = currentTop - dy;
    if (dy > 0) { // Upward
        if (newTop < mMinOffset) {
            consumed[1] = currentTop - mMinOffset;
            ViewCompat.offsetTopAndBottom(child, -consumed[1]);
            setStateInternal(STATE_EXPANDED);
        } else {
            consumed[1] = dy;
            ViewCompat.offsetTopAndBottom(child, -dy);
            setStateInternal(STATE_DRAGGING);
        }
    } else if (dy < 0) { // Downward
        if (!ViewCompat.canScrollVertically(target, -1)) {
            if (newTop <= mMaxOffset || mHideable) {
                consumed[1] = dy;
                ViewCompat.offsetTopAndBottom(child, -dy);
                setStateInternal(STATE_DRAGGING);
            } else {
                consumed[1] = currentTop - mMaxOffset;
                ViewCompat.offsetTopAndBottom(child, -consumed[1]);
                setStateInternal(STATE_COLLAPSED);
            }
        }
    }
    dispatchOnSlide(child.getTop());
    mLastNestedScrollDy = dy;
    mNestedScrolled = true;
}