Example usage for android.view View OVER_SCROLL_NEVER

List of usage examples for android.view View OVER_SCROLL_NEVER

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Introduction

In this page you can find the example usage for android.view View OVER_SCROLL_NEVER.

Prototype

int OVER_SCROLL_NEVER

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Document

Never allow a user to over-scroll this view.

Usage

From source file:cn.ismartv.tvrecyclerview.widget.RecyclerView.java

/**
 * Does not perform bounds checking. Used by internal methods that have already validated input.
 * <p>//from www . ja v a  2  s  .co  m
 * It also reports any unused scroll request to the related EdgeEffect.
 *
 * @param x The amount of horizontal scroll request
 * @param y The amount of vertical scroll request
 * @param ev The originating MotionEvent, or null if not from a touch event.
 *
 * @return Whether any scroll was consumed in either direction.
 */
boolean scrollByInternal(int x, int y, MotionEvent ev) {
    int unconsumedX = 0, unconsumedY = 0;
    int consumedX = 0, consumedY = 0;

    consumePendingUpdateOperations();
    if (mAdapter != null) {
        eatRequestLayout();
        onEnterLayoutOrScroll();
        TraceCompat.beginSection(TRACE_SCROLL_TAG);
        if (x != 0) {
            consumedX = mLayout.scrollHorizontallyBy(x, mRecycler, mState);
            unconsumedX = x - consumedX;
        }
        if (y != 0) {
            consumedY = mLayout.scrollVerticallyBy(y, mRecycler, mState);
            unconsumedY = y - consumedY;
        }
        TraceCompat.endSection();
        repositionShadowingViews();
        onExitLayoutOrScroll();
        resumeRequestLayout(false);
    }
    if (!mItemDecorations.isEmpty()) {
        invalidate();
    }

    if (dispatchNestedScroll(consumedX, consumedY, unconsumedX, unconsumedY, mScrollOffset)) {
        // Update the last touch co-ords, taking any scroll offset into account
        mLastTouchX -= mScrollOffset[0];
        mLastTouchY -= mScrollOffset[1];
        if (ev != null) {
            ev.offsetLocation(mScrollOffset[0], mScrollOffset[1]);
        }
        mNestedOffsets[0] += mScrollOffset[0];
        mNestedOffsets[1] += mScrollOffset[1];
    } else if (getOverScrollMode() != View.OVER_SCROLL_NEVER) {
        if (ev != null) {
            pullGlows(ev.getX(), unconsumedX, ev.getY(), unconsumedY);
        }
        considerReleasingGlowsOnScroll(x, y);
    }
    if (consumedX != 0 || consumedY != 0) {
        dispatchOnScrolled(consumedX, consumedY);
    }
    if (!awakenScrollBars()) {
        invalidate();
    }
    return consumedX != 0 || consumedY != 0;
}