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

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

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Introduction

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

Prototype

int OVER_SCROLL_ALWAYS

To view the source code for android.support.v4.view ViewCompat OVER_SCROLL_ALWAYS.

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Document

Always allow a user to over-scroll this view, provided it is a view that can scroll.

Usage

From source file:com.blestep.sportsbracelet.view.TimelineChartView.java

private void onOverScroll() {
    final boolean needOverScroll;
    synchronized (mLock) {
        needOverScroll = mData.size() >= Math.floor(mMaxBarItemsInScreen / 2);
    }//from  ww  w  .j  av a 2 s .co m
    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && needOverScroll)) {
        boolean needsInvalidate = false;
        if (mCurrentOffset > mMaxOffset) {
            needsInvalidate = true;
        }
        if (mCurrentOffset < 0) {
            needsInvalidate = true;
        }

        if (needsInvalidate) {
            ViewCompat.postInvalidateOnAnimation(this);
        }
    }
}

From source file:com.irontec.jaigiro.widgets.StaggeredGridView.java

/**
 * //from w ww.  j  ava  2s  .  co  m
 * @param deltaY
 *            Pixels that content should move by
 * @return true if the movement completed, false if it was stopped
 *         prematurely.
 */
private boolean trackMotionScroll(int deltaY, boolean allowOverScroll) {
    final boolean contentFits = contentFits();
    final int allowOverhang = Math.abs(deltaY);

    final int overScrolledBy;
    final int movedBy;
    if (!contentFits) {
        final int overhang;
        final boolean up;
        mPopulating = true;
        if (deltaY > 0) {
            overhang = fillUp(mFirstPosition - 1, allowOverhang);
            up = true;
        } else {
            overhang = fillDown(mFirstPosition + getChildCount(), allowOverhang) + mItemMargin;
            up = false;
        }
        movedBy = Math.min(overhang, allowOverhang);
        offsetChildren(up ? movedBy : -movedBy);
        recycleOffscreenViews();
        mPopulating = false;
        overScrolledBy = allowOverhang - overhang;
    } else {
        overScrolledBy = allowOverhang;
        movedBy = 0;
    }

    if (allowOverScroll) {
        final int overScrollMode = ViewCompat.getOverScrollMode(this);

        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && !contentFits)) {

            if (overScrolledBy > 0) {
                EdgeEffectCompat edge = deltaY > 0 ? mTopEdge : mBottomEdge;
                edge.onPull((float) Math.abs(deltaY) / getHeight());
                ViewCompat.postInvalidateOnAnimation(this);
            }
        }
    }

    invokeOnItemScrollListener();

    return deltaY == 0 || movedBy != 0;
}

From source file:com.blestep.sportsbracelet.view.TimelineChartView.java

/**
 * {@inheritDoc}/*  w w w  .  j  av  a2s . c o m*/
 */
@Override
public void computeScroll() {
    super.computeScroll();

    // Determine whether we still scrolling and needs a viewport refresh
    final boolean scrolling = mScroller.computeScrollOffset();
    if (scrolling) {
        float x = mScroller.getCurrX();
        if (x > mMaxOffset || x < 0) {
            return;
        }
        mCurrentOffset = x;
        ViewCompat.postInvalidateOnAnimation(this);
    } else if (mState > STATE_MOVING) {
        boolean needsInvalidate = false;
        final boolean needOverScroll;
        synchronized (mLock) {
            needOverScroll = mData.size() >= Math.floor(mMaxBarItemsInScreen / 2);
        }
        final int overScrollMode = ViewCompat.getOverScrollMode(this);
        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (needOverScroll && overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS)) {
            float x = mScroller.getCurrX();
            if (x >= mMaxOffset) {
                needsInvalidate = true;
            }
            if (x < 0) {
                needsInvalidate = true;
            }
        }
        if (!needsInvalidate) {
            // Reset state
            mState = STATE_IDLE;
            mLastPosition = -1;
        } else {
            ViewCompat.postInvalidateOnAnimation(this);
        }
    }

    int position = computeNearestPositionFromOffset(mCurrentOffset);

    // If we are not centered in a item, perform an scroll
    if (mState == STATE_IDLE) {
        smoothScrollTo(position);
    }

    if (mCurrentPosition != position) {
        // Don't perform selection operations while we are just scrolling
        if (mState != STATE_SCROLLING) {
            mCurrentPosition = position;

            // Notify any valid item, but only notify invalid items if
            // we are not panning/scrolling
            if (mCurrentPosition >= 0 || !scrolling) {
                Message.obtain(mUiHandler, MSG_ON_SELECTION_ITEM_CHANGED).sendToTarget();
            }
        }
    }
}

From source file:com.mcxiaoke.minicat.ui.widget.StaggeredGridView.java

/**
 * @param deltaY Pixels that content should move by
 * @return true if the movement completed, false if it was stopped prematurely.
 *///w w w. j  a v a 2 s  .  co m
private boolean trackMotionScroll(int deltaY, boolean allowOverScroll) {
    final boolean contentFits = contentFits();
    final int allowOverhang = Math.abs(deltaY);

    final int overScrolledBy;
    final int movedBy;
    if (!contentFits) {
        final int overhang;
        final boolean up;
        mPopulating = true;
        if (deltaY > 0) {
            overhang = fillUp(mFirstPosition - 1, allowOverhang);
            up = true;
        } else {
            overhang = fillDown(mFirstPosition + getChildCount(), allowOverhang) + mItemMargin;
            up = false;
        }
        movedBy = Math.min(overhang, allowOverhang);
        offsetChildren(up ? movedBy : -movedBy);
        recycleOffscreenViews();
        mPopulating = false;
        overScrolledBy = allowOverhang - overhang;
    } else {
        overScrolledBy = allowOverhang;
        movedBy = 0;
    }

    if (allowOverScroll) {
        final int overScrollMode = ViewCompat.getOverScrollMode(this);

        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && !contentFits)) {
            if (overScrolledBy > 0) {
                EdgeEffectCompat edge = deltaY > 0 ? mTopEdge : mBottomEdge;
                edge.onPull((float) Math.abs(deltaY) / getHeight());
                invalidate();
            }
        }
    }

    if (mSelectorPosition != INVALID_POSITION) {
        final int childIndex = mSelectorPosition - mFirstPosition;
        if (childIndex >= 0 && childIndex < getChildCount()) {
            positionSelector(INVALID_POSITION, getChildAt(childIndex));
        }
    } else {
        mSelectorRect.setEmpty();
    }

    return deltaY == 0 || movedBy != 0;
}

From source file:tanglie.mystaggeredgridview.StaggeredGridView.java

/**
 *
 * @param deltaY Pixels that content should move by
 * @return true if the movement completed, false if it was stopped prematurely.
 *//*from w  w w .  jav  a 2s .c om*/
private boolean trackMotionScroll(int deltaY, boolean allowOverScroll) {
    final boolean contentFits = contentFits();
    final int allowOverhang = Math.abs(deltaY);

    final int overScrolledBy;
    final int movedBy;
    if (!contentFits) {
        final int overhang;
        final boolean up;
        mPopulating = true;
        if (deltaY > 0) {
            overhang = fillUp(mFirstPosition - 1, allowOverhang) + mItemMargin;
            up = true;
        } else {
            //                overhang = fillDown(mFirstPosition + getChildCount(), allowOverhang) + mItemMargin;
            overhang = 0;
            up = false;
        }
        movedBy = Math.min(overhang, allowOverhang);
        offsetChildren(up ? movedBy : -movedBy);
        recycleOffscreenViews();
        mPopulating = false;
        overScrolledBy = allowOverhang - overhang;
    } else {
        overScrolledBy = allowOverhang;
        movedBy = 0;
    }

    if (allowOverScroll) {
        final int overScrollMode = ViewCompat.getOverScrollMode(this);

        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && !contentFits)) {
            if (overScrolledBy > 0) {
                EdgeEffectCompat edge = deltaY > 0 ? mTopEdge : mBottomEdge;
                edge.onPull((float) Math.abs(deltaY) / getHeight());
                invalidate();
            }
        }
    }

    if (mSelectorPosition != INVALID_POSITION) {
        final int childIndex = mSelectorPosition - mFirstPosition;
        if (childIndex >= 0 && childIndex < getChildCount()) {
            positionSelector(INVALID_POSITION, getChildAt(childIndex));
        }
    } else {
        mSelectorRect.setEmpty();
    }

    return deltaY == 0 || movedBy != 0;
}

From source file:com.rajul.staggeredgridview.StaggeredGridView.java

/**
 * @param deltaY Pixels that content should move by
 * @return true if the movement completed, false if it was stopped
 *         prematurely.//from   w ww. j  a v a 2  s .  co m
 */
private boolean trackMotionScroll(int deltaY, boolean allowOverScroll) {
    final boolean contentFits = contentFits();
    final int allowOverhang = Math.abs(deltaY);

    final int overScrolledBy;
    final int movedBy;
    if (!contentFits) {
        final int overhang;
        final boolean up;
        mPopulating = true;
        if (deltaY > 0) {
            overhang = fillUp(mFirstPosition - 1, allowOverhang);
            up = true;
        } else {
            overhang = fillDown(mFirstPosition + getChildCount(), allowOverhang) + mItemMargin;
            up = false;
        }
        movedBy = Math.min(overhang, allowOverhang);
        offsetChildren(up ? movedBy : -movedBy);
        recycleOffscreenViews();
        mPopulating = false;
        overScrolledBy = allowOverhang - overhang;
    } else {
        overScrolledBy = allowOverhang;
        movedBy = 0;
    }

    if (allowOverScroll) {
        final int overScrollMode = ViewCompat.getOverScrollMode(this);

        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && !contentFits)) {

            if (overScrolledBy > 0) {
                EdgeEffectCompat edge = deltaY > 0 ? mTopEdge : mBottomEdge;
                edge.onPull((float) Math.abs(deltaY) / getHeight());
                ViewCompat.postInvalidateOnAnimation(this);
            }
        }
    }

    invokeOnItemScrollListener();
    // TODO
    if (mSelectorPosition != INVALID_POSITION) {
        final int childIndex = mSelectorPosition - mFirstPosition;
        if (childIndex >= 0 && childIndex < getChildCount()) {
            positionSelector(INVALID_POSITION, getChildAt(childIndex));
        }
    } else {
        mSelectorRect.setEmpty();
    }

    return deltaY == 0 || movedBy != 0;
}

From source file:cn.iterlog.myapplication.widget.overscroll.StaggeredGridView.java

/**
 *
 * @param deltaY Pixels that content should move by
 * @return true if the movement completed, false if it was stopped prematurely.
 *//*from w  w  w  .  j a v  a 2 s .  c  om*/
private boolean trackMotionScroll(int deltaY, boolean allowOverScroll) {
    final boolean contentFits = contentFits();
    final int allowOverhang = Math.abs(deltaY);

    final int overScrolledBy;
    final int movedBy;
    if (!contentFits) {
        final int overhang;
        final boolean up;
        mPopulating = true;
        if (deltaY > 0) {
            overhang = fillUp(mFirstPosition - 1, allowOverhang) + mItemMargin;
            up = true;
        } else {
            overhang = fillDown(mFirstPosition + getChildCount(), allowOverhang) + mItemMargin;
            up = false;
        }
        movedBy = Math.min(overhang, allowOverhang);
        offsetChildren(up ? movedBy : -movedBy);
        recycleOffscreenViews();
        mPopulating = false;
        overScrolledBy = allowOverhang - overhang;
    } else {
        overScrolledBy = allowOverhang;
        movedBy = 0;
    }

    if (allowOverScroll) {
        final int overScrollMode = ViewCompat.getOverScrollMode(this);

        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && !contentFits)) {
            if (overScrolledBy > 0) {
                EdgeEffectCompat edge = deltaY > 0 ? mTopEdge : mBottomEdge;
                edge.onPull((float) Math.abs(deltaY) / getHeight());
                invalidate();
            }
        }
    }

    if (mSelectorPosition != INVALID_POSITION) {
        final int childIndex = mSelectorPosition - mFirstPosition;
        if (childIndex >= 0 && childIndex < getChildCount()) {
            positionSelector(INVALID_POSITION, getChildAt(childIndex));
        }
    } else {
        mSelectorRect.setEmpty();
    }

    return deltaY == 0 || movedBy != 0;
}

From source file:chan.android.app.bitwise.util.StaggeredGridView.java

/**
 * @param deltaY Pixels that content should move by
 * @return true if the movement completed, false if it was stopped prematurely.
 *//*  ww w .  ja  va2s  .  c  o  m*/
private boolean trackMotionScroll(int deltaY, boolean allowOverScroll) {
    final boolean contentFits = contentFits();
    final int allowOverhang = Math.abs(deltaY);

    final int overScrolledBy;
    int movedBy;

    if (!contentFits) {
        final int overhang;
        final boolean up;
        mPopulating = true;

        if (deltaY > 0) {
            overhang = fillUp(mFirstPosition - 1, allowOverhang) + mItemMargin;
            up = true;
        } else {
            overhang = fillDown(mFirstPosition + getChildCount(), allowOverhang) + mItemMargin;
            up = false;
        }

        movedBy = Math.min(overhang, allowOverhang);
        if (movedBy < 0) {
            movedBy = 0;
        }

        if (movedBy == 0) {
            if (up) {
                mGetToTop = true;
                lazyload = false;
            } else {
                mGetToTop = false;
                lazyload = true;

                if (!loadlock) {
                    mLoadListener.onLoadmore();
                    loadlock = true;
                }
            }
        } else {
            mGetToTop = false;
            lazyload = true;
        }

        offsetChildren(up ? movedBy : -movedBy);
        if (getChildCount() > MAX_CHILD_COUNT) {
            recycleOffscreenViews();
        }

        mPopulating = false;
        overScrolledBy = allowOverhang - overhang;

    } else {
        overScrolledBy = allowOverhang;
        movedBy = 0;
    }

    if (allowOverScroll) {
        final int overScrollMode = ViewCompat.getOverScrollMode(this);

        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && !contentFits)) {
            if (overScrolledBy > 0) {
                EdgeEffectCompat edge = deltaY > 0 ? mTopEdge : mBottomEdge;
                edge.onPull((float) Math.abs(deltaY) / getHeight());
                invalidate();
            }
        }
    }

    if (mSelectorPosition != INVALID_POSITION) {
        final int childIndex = mSelectorPosition - mFirstPosition;
        if (childIndex >= 0 && childIndex < getChildCount()) {
            positionSelector(INVALID_POSITION, getChildAt(childIndex));
        }
    } else {
        mSelectorRect.setEmpty();
    }

    return deltaY == 0 || movedBy != 0;
}

From source file:com.acbelter.scheduleview.ScheduleView.java

private void drawEdgeEffects(Canvas canvas) {
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS) {
        if (!mTopEdgeEffect.isFinished()) {
            int saveCount = canvas.save();
            int width = mViewWidth - getPaddingLeft() - getPaddingRight();
            int height = mViewHeight - getPaddingTop() - getPaddingBottom();

            canvas.translate(0, getPaddingTop());

            mTopEdgeEffect.setSize(width, height);
            needsInvalidate |= mTopEdgeEffect.draw(canvas);
            canvas.restoreToCount(saveCount);
        }/* w  ww . jav a2 s  .  co m*/
        if (!mBottomEdgeEffect.isFinished()) {
            int saveCount = canvas.save();
            int width = mViewWidth - getPaddingLeft() - getPaddingRight();
            int height = mViewHeight - getPaddingTop() - getPaddingBottom();

            canvas.translate(mViewWidth, mViewHeight - getPaddingBottom());
            canvas.rotate(180);

            mBottomEdgeEffect.setSize(width, height);
            needsInvalidate |= mBottomEdgeEffect.draw(canvas);
            canvas.restoreToCount(saveCount);
        }
    } else {
        mTopEdgeEffect.finish();
        mBottomEdgeEffect.finish();
    }

    if (needsInvalidate) {
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

From source file:com.example.GoIceland.grids.StaggeredGridView.java

/**
 * @param deltaY Pixels that content should move by
 * @return true if the movement completed, false if it was stopped prematurely.
 *//* w  w w.j av  a2s  . c o  m*/
private boolean trackMotionScroll(int deltaY, boolean allowOverScroll) {
    final boolean contentFits = contentFits();
    final int allowOverhang = Math.abs(deltaY);

    final int overScrolledBy;
    int movedBy;

    if (!contentFits) {
        final int overhang;
        final boolean up;
        mPopulating = true;

        if (deltaY > 0) {
            overhang = fillUp(mFirstPosition - 1, allowOverhang) + mItemMargin;
            up = true;
        } else {
            overhang = fillDown(mFirstPosition + getChildCount(), allowOverhang) + mItemMargin;
            up = false;
        }

        movedBy = Math.min(overhang, allowOverhang);
        if (movedBy < 0) {
            movedBy = 0;
        }

        if (movedBy == 0) {
            if (up) {
                mGetToTop = true;
                lazyload = false;
            } else {
                mGetToTop = false;
                lazyload = true;

                if (!loadlock) {
                    //mLoadListener.onLoadmore();
                    loadlock = true;
                }
            }
        } else {
            mGetToTop = false;
            lazyload = true;
        }

        offsetChildren(up ? movedBy : -movedBy);
        if (getChildCount() > MAX_CHILD_COUNT) {
            recycleOffscreenViews();
        }

        mPopulating = false;
        overScrolledBy = allowOverhang - overhang;

    } else {
        overScrolledBy = allowOverhang;
        movedBy = 0;
    }

    if (allowOverScroll) {
        final int overScrollMode = ViewCompat.getOverScrollMode(this);

        if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
                || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && !contentFits)) {
            if (overScrolledBy > 0) {
                EdgeEffectCompat edge = deltaY > 0 ? mTopEdge : mBottomEdge;
                edge.onPull((float) Math.abs(deltaY) / getHeight());
                invalidate();
            }
        }
    }

    if (mSelectorPosition != INVALID_POSITION) {
        final int childIndex = mSelectorPosition - mFirstPosition;
        if (childIndex >= 0 && childIndex < getChildCount()) {
            positionSelector(INVALID_POSITION, getChildAt(childIndex));
        }
    } else {
        mSelectorRect.setEmpty();
    }

    return deltaY == 0 || movedBy != 0;
}