Examples with OrientationHelper android.support.v7.widget.OrientationHelper used on opensource projects

Example 16 with OrientationHelper

use of android.support.v7.widget.OrientationHelper in project RecyclerViewSnap by rubensousa.

the class GravitySnapHelper method findEndView.

private View findEndView(RecyclerView.LayoutManager layoutManager, OrientationHelper helper) {
    if (layoutManager instanceof LinearLayoutManager) {
        int lastChild = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
        if (lastChild == RecyclerView.NO_POSITION) {
            return null;
        }
        View child = layoutManager.findViewByPosition(lastChild);
        float visibleWidth;
        if (mIsRtlHorizontal) {
            visibleWidth = (float) helper.getDecoratedEnd(child) / helper.getDecoratedMeasurement(child);
        } else {
            visibleWidth = (float) (helper.getTotalSpace() - helper.getDecoratedStart(child)) / helper.getDecoratedMeasurement(child);
        }
        // If we're at the start of the list, we shouldn't snap
        // to avoid having the first item not completely visible.
        boolean startOfList = ((LinearLayoutManager) layoutManager).findFirstCompletelyVisibleItemPosition() == 0;
        if (visibleWidth > 0.5f && !startOfList) {
            return child;
        } else if (mSnapLastItemEnabled && startOfList) {
            return child;
        } else if (startOfList) {
            return null;
        } else {
            // If the child wasn't returned, we need to return the previous view
            return layoutManager.findViewByPosition(lastChild - 1);
        }
    }
    return null;
}

Example 17 with OrientationHelper

use of android.support.v7.widget.OrientationHelper in project vlayout by alibaba.

the class ColumnLayoutHelper method layoutViews.

@Override
public void layoutViews(RecyclerView.Recycler recycler, RecyclerView.State state, VirtualLayoutManager.LayoutStateWrapper layoutState, LayoutChunkResult result, LayoutManagerHelper helper) {
    // reach the end of this layout
    if (isOutOfRange(layoutState.getCurrentPosition())) {
        return;
    }
    final boolean layoutInVertical = helper.getOrientation() == VERTICAL;
    final OrientationHelper orientationHelper = helper.getMainOrientationHelper();
    final int itemCount = getItemCount();
    if (mViews == null || mViews.length != itemCount) {
        mViews = new View[itemCount];
    }
    if (mEqViews == null || mEqViews.length != itemCount) {
        mEqViews = new View[itemCount];
    } else {
        Arrays.fill(mEqViews, null);
    }
    final int count = getAllChildren(mViews, recycler, layoutState, result, helper);
    if (layoutInVertical) {
        // TODO: only handle vertical layout now
        int maxVMargin = 0;
        int lastHMargin = 0;
        int totalMargin = 0;
        for (int i = 0; i < count; i++) {
            View view = mViews[i];
            ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
            if (layoutParams instanceof RecyclerView.LayoutParams) {
                RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) layoutParams;
                params.leftMargin = Math.max(lastHMargin, params.leftMargin);
                totalMargin += params.leftMargin;
                if (i != count - 1) {
                    // not last item
                    lastHMargin = params.rightMargin;
                    params.rightMargin = 0;
                } else {
                    totalMargin += params.rightMargin;
                }
                maxVMargin = Math.max(maxVMargin, params.topMargin + params.bottomMargin);
            }
        }
        final int totalWidth = helper.getContentWidth() - helper.getPaddingLeft() - helper.getPaddingRight() - getHorizontalMargin() - getHorizontalPadding();
        final int availableWidth = totalWidth - totalMargin;
        int usedWidth = 0;
        int minHeight = Integer.MAX_VALUE;
        int uniformHeight = -1;
        if (!Float.isNaN(mAspectRatio)) {
            uniformHeight = (int) (totalWidth / mAspectRatio + 0.5f);
        }
        int eqSize = 0;
        for (int i = 0; i < count; i++) {
            View view = mViews[i];
            VirtualLayoutManager.LayoutParams params = (VirtualLayoutManager.LayoutParams) view.getLayoutParams();
            int heightSpec = helper.getChildMeasureSpec(helper.getContentHeight() - helper.getPaddingTop() - helper.getPaddingBottom(), uniformHeight > 0 ? uniformHeight : params.height, true);
            if (mWeights != null && i < mWeights.length && !Float.isNaN(mWeights[i]) && mWeights[i] >= 0) {
                // calculate width with weight in percentage
                int resizeWidth = (int) (mWeights[i] * 1.0f / 100 * availableWidth + 0.5f);
                if (!Float.isNaN(params.mAspectRatio)) {
                    int specialHeight = (int) (resizeWidth / params.mAspectRatio + 0.5f);
                    heightSpec = View.MeasureSpec.makeMeasureSpec(specialHeight, View.MeasureSpec.EXACTLY);
                }
                helper.measureChild(view, View.MeasureSpec.makeMeasureSpec(resizeWidth, View.MeasureSpec.EXACTLY), heightSpec);
                // add width into usedWidth
                usedWidth += resizeWidth;
                // find minHeight
                minHeight = Math.min(minHeight, view.getMeasuredHeight());
            } else {
                mEqViews[eqSize++] = view;
            }
        }
        for (int i = 0; i < eqSize; i++) {
            View view = mEqViews[i];
            VirtualLayoutManager.LayoutParams params = (VirtualLayoutManager.LayoutParams) view.getLayoutParams();
            int heightSpec;
            int resizeWidth = (int) ((availableWidth - usedWidth) * 1.0f / eqSize + 0.5f);
            if (!Float.isNaN(params.mAspectRatio)) {
                int specialHeight = (int) (resizeWidth / params.mAspectRatio + 0.5f);
                heightSpec = View.MeasureSpec.makeMeasureSpec(specialHeight, View.MeasureSpec.EXACTLY);
            } else {
                heightSpec = helper.getChildMeasureSpec(helper.getContentHeight() - helper.getPaddingTop() - helper.getPaddingBottom(), uniformHeight > 0 ? uniformHeight : params.height, true);
            }
            //if cols' length is less than view's count, then remainder views share the rest space
            helper.measureChild(view, View.MeasureSpec.makeMeasureSpec(resizeWidth, View.MeasureSpec.EXACTLY), heightSpec);
            // find minHeight
            minHeight = Math.min(minHeight, view.getMeasuredHeight());
        }
        // uniform all views into min height
        for (int i = 0; i < count; i++) {
            View view = mViews[i];
            if (view.getMeasuredHeight() != minHeight) {
                //noinspection ResourceType
                helper.measureChild(view, View.MeasureSpec.makeMeasureSpec(view.getMeasuredWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(minHeight, View.MeasureSpec.EXACTLY));
            }
        }
        result.mConsumed = minHeight + maxVMargin + getVerticalMargin() + getVerticalPadding();
        calculateRect(minHeight + maxVMargin, mTempArea, layoutState, helper);
        // do layout
        int left = mTempArea.left;
        for (int i = 0; i < count; i++) {
            View view = mViews[i];
            int top = mTempArea.top, bottom = mTempArea.bottom;
            int right = left + orientationHelper.getDecoratedMeasurementInOther(view);
            layoutChild(view, left, top, right, bottom, helper);
            left = right;
        }
    }
    Arrays.fill(mViews, null);
    Arrays.fill(mEqViews, null);
}

Example 18 with OrientationHelper

use of android.support.v7.widget.OrientationHelper in project vlayout by alibaba.

the class GridLayoutHelper method layoutViews.

@Override
public void layoutViews(RecyclerView.Recycler recycler, RecyclerView.State state, LayoutStateWrapper layoutState, LayoutChunkResult result, LayoutManagerHelper helper) {
    // reach the end of this layout
    if (isOutOfRange(layoutState.getCurrentPosition())) {
        return;
    }
    boolean isStartLine = false, isEndLine = false;
    final int currentPosition = layoutState.getCurrentPosition();
    final int itemDirection = layoutState.getItemDirection();
    final boolean layingOutInPrimaryDirection = itemDirection == LayoutStateWrapper.ITEM_DIRECTION_TAIL;
    OrientationHelper orientationHelper = helper.getMainOrientationHelper();
    final boolean layoutInVertical = helper.getOrientation() == VERTICAL;
    if (layoutInVertical) {
        mTotalSize = helper.getContentWidth() - helper.getPaddingRight() - helper.getPaddingLeft() - getHorizontalMargin() - getHorizontalPadding();
        mSizePerSpan = (int) ((mTotalSize - (mSpanCount - 1) * mHGap) * 1.0f / mSpanCount + 0.5f);
    } else {
        mTotalSize = helper.getContentHeight() - helper.getPaddingBottom() - helper.getPaddingTop() - getVerticalMargin() - getVerticalPadding();
        mSizePerSpan = (int) ((mTotalSize - (mSpanCount - 1) * mVGap) * 1.0f / mSpanCount + 0.5f);
    }
    int count = 0;
    int consumedSpanCount = 0;
    int remainingSpan = mSpanCount;
    ensureSpanCount();
    if (!layingOutInPrimaryDirection) {
        // fill the remaining spacing this row
        int itemSpanIndex = getSpanIndex(recycler, state, layoutState.getCurrentPosition());
        int itemSpanSize = getSpanSize(recycler, state, layoutState.getCurrentPosition());
        remainingSpan = itemSpanIndex + itemSpanSize;
        // should find the last element of this row
        if (itemSpanIndex != mSpanCount - 1) {
            int index = layoutState.getCurrentPosition();
            int revRemainingSpan = mSpanCount - remainingSpan;
            while (count < mSpanCount && revRemainingSpan > 0) {
                // go reverse direction to find views fill current row
                index -= itemDirection;
                if (isOutOfRange(index)) {
                    break;
                }
                final int spanSize = getSpanSize(recycler, state, index);
                if (spanSize > mSpanCount) {
                    throw new IllegalArgumentException("Item at position " + index + " requires " + spanSize + " spans but GridLayoutManager has only " + mSpanCount + " spans.");
                }
                View view = layoutState.retrieve(recycler, index);
                if (view == null)
                    break;
                if (!isStartLine) {
                    isStartLine = helper.getReverseLayout() ? index == getRange().getUpper() : index == getRange().getLower();
                }
                if (!isEndLine) {
                    isEndLine = helper.getReverseLayout() ? index == getRange().getLower() : index == getRange().getUpper();
                }
                revRemainingSpan -= spanSize;
                if (revRemainingSpan < 0)
                    break;
                consumedSpanCount += spanSize;
                mSet[count] = view;
                count++;
            }
            if (count > 0) {
                // reverse array
                int s = 0, e = count - 1;
                while (s < e) {
                    View temp = mSet[s];
                    mSet[s] = mSet[e];
                    mSet[e] = temp;
                    s++;
                    e--;
                }
            }
        }
    }
    while (count < mSpanCount && layoutState.hasMore(state) && remainingSpan > 0) {
        int pos = layoutState.getCurrentPosition();
        if (isOutOfRange(pos)) {
            if (DEBUG)
                Log.d(TAG, "pos [" + pos + "] is out of range");
            break;
        }
        final int spanSize = getSpanSize(recycler, state, pos);
        if (spanSize > mSpanCount) {
            throw new IllegalArgumentException("Item at position " + pos + " requires " + spanSize + " spans but GridLayoutManager has only " + mSpanCount + " spans.");
        }
        remainingSpan -= spanSize;
        if (remainingSpan < 0) {
            // item did not fit into this row or column
            break;
        }
        View view = layoutState.next(recycler);
        if (view == null) {
            break;
        }
        if (!isStartLine) {
            isStartLine = helper.getReverseLayout() ? pos == getRange().getUpper().intValue() : pos == getRange().getLower().intValue();
        }
        if (!isEndLine) {
            isEndLine = helper.getReverseLayout() ? pos == getRange().getLower().intValue() : pos == getRange().getUpper().intValue();
        }
        consumedSpanCount += spanSize;
        mSet[count] = view;
        count++;
    }
    if (count == 0) {
        return;
    }
    int maxSize = 0;
    // we should assign spans before item decor offsets are calculated
    assignSpans(recycler, state, count, consumedSpanCount, layingOutInPrimaryDirection, helper);
    if (remainingSpan > 0 && mIsAutoExpand) {
        if (layoutInVertical) {
            mSizePerSpan = (helper.getContentWidth() - helper.getPaddingRight() - getHorizontalMargin() - getHorizontalPadding() - helper.getPaddingLeft() - (count - 1) * mHGap) / count;
        } else {
            mSizePerSpan = (helper.getContentHeight() - helper.getPaddingBottom() - getVerticalMargin() - getVerticalPadding() - helper.getPaddingTop() - (count - 1) * mVGap) / count;
        }
    }
    boolean weighted = false;
    if (mWeights != null && mWeights.length > 0) {
        weighted = true;
        int totalSpace;
        if (layoutInVertical) {
            totalSpace = helper.getContentWidth() - helper.getPaddingLeft() - helper.getPaddingRight() - getHorizontalMargin() - getHorizontalPadding() - (count - 1) * mHGap;
        } else {
            totalSpace = helper.getContentHeight() - helper.getPaddingTop() - helper.getPaddingBottom() - getVerticalMargin() - getVerticalPadding() - (count - 1) * mVGap;
        }
        // calculate width with weight in percentage
        int eqCnt = 0, remainingSpace = totalSpace;
        int colCnt = (remainingSpan > 0 && mIsAutoExpand) ? count : mSpanCount;
        for (int i = 0; i < colCnt; i++) {
            if (i < mWeights.length && !Float.isNaN(mWeights[i]) && mWeights[i] >= 0) {
                float weight = mWeights[i];
                mSpanCols[i] = (int) (weight * 1.0f / 100 * totalSpace + 0.5f);
                remainingSpace -= mSpanCols[i];
            } else {
                eqCnt++;
                mSpanCols[i] = -1;
            }
        }
        if (eqCnt > 0) {
            int eqLength = remainingSpace / eqCnt;
            for (int i = 0; i < colCnt; i++) {
                if (mSpanCols[i] < 0) {
                    mSpanCols[i] = eqLength;
                }
            }
        }
    }
    for (int i = 0; i < count; i++) {
        View view = mSet[i];
        helper.addChildView(layoutState, view, layingOutInPrimaryDirection ? -1 : 0);
        int spanSize = getSpanSize(recycler, state, helper.getPosition(view)), spec;
        if (weighted) {
            final int index = mSpanIndices[i];
            int spanLength = 0;
            for (int j = 0; j < spanSize; j++) {
                spanLength += mSpanCols[j + index];
            }
            spec = View.MeasureSpec.makeMeasureSpec(Math.max(0, spanLength), View.MeasureSpec.EXACTLY);
        } else {
            spec = View.MeasureSpec.makeMeasureSpec(mSizePerSpan * spanSize + Math.max(0, spanSize - 1) * (layoutInVertical ? mHGap : mVGap), View.MeasureSpec.EXACTLY);
        }
        final VirtualLayoutManager.LayoutParams lp = (VirtualLayoutManager.LayoutParams) view.getLayoutParams();
        if (helper.getOrientation() == VERTICAL) {
            helper.measureChild(view, spec, getMainDirSpec(lp.height, mTotalSize, View.MeasureSpec.getSize(spec), lp.mAspectRatio));
        } else {
            helper.measureChild(view, getMainDirSpec(lp.width, mTotalSize, View.MeasureSpec.getSize(spec), lp.mAspectRatio), View.MeasureSpec.getSize(spec));
        }
        final int size = orientationHelper.getDecoratedMeasurement(view);
        if (size > maxSize) {
            maxSize = size;
        }
    }
    // views that did not measure the maxSize has to be re-measured
    final int maxMeasureSpec = getMainDirSpec(maxSize, mTotalSize, 0, Float.NaN);
    for (int i = 0; i < count; i++) {
        final View view = mSet[i];
        if (orientationHelper.getDecoratedMeasurement(view) != maxSize) {
            int spanSize = getSpanSize(recycler, state, helper.getPosition(view)), spec;
            if (weighted) {
                final int index = mSpanIndices[i];
                int spanLength = 0;
                for (int j = 0; j < spanSize; j++) {
                    spanLength += mSpanCols[j + index];
                }
                spec = View.MeasureSpec.makeMeasureSpec(Math.max(0, spanLength), View.MeasureSpec.EXACTLY);
            } else {
                spec = View.MeasureSpec.makeMeasureSpec(mSizePerSpan * spanSize + Math.max(0, spanSize - 1) * (layoutInVertical ? mHGap : mVGap), View.MeasureSpec.EXACTLY);
            }
            if (helper.getOrientation() == VERTICAL) {
                helper.measureChild(view, spec, maxMeasureSpec);
            } else {
                helper.measureChild(view, maxMeasureSpec, spec);
            }
        }
    }
    int startSpace = 0, endSpace = 0;
    if (isStartLine) {
        startSpace = layoutInVertical ? mMarginTop + mPaddingTop : mMarginLeft + mPaddingLeft;
    }
    if (isEndLine) {
        endSpace = layoutInVertical ? mMarginBottom + mPaddingBottom : mMarginRight + mPaddingRight;
    }
    result.mConsumed = maxSize + startSpace + endSpace;
    final boolean layoutStart = layoutState.getLayoutDirection() == LayoutStateWrapper.LAYOUT_START;
    if (!mLayoutWithAnchor && (!isEndLine || !layoutStart) && (!isStartLine || layoutStart)) {
        result.mConsumed += (layoutInVertical ? mVGap : mHGap);
    }
    int left = 0, right = 0, top = 0, bottom = 0;
    if (layoutInVertical) {
        if (layoutState.getLayoutDirection() == LayoutStateWrapper.LAYOUT_START) {
            bottom = layoutState.getOffset() - endSpace - ((mLayoutWithAnchor || isEndLine) ? 0 : mVGap);
            top = bottom - maxSize;
        } else {
            top = layoutState.getOffset() + startSpace + ((mLayoutWithAnchor || isStartLine) ? 0 : mVGap);
            bottom = top + maxSize;
        }
    } else {
        if (layoutState.getLayoutDirection() == LayoutStateWrapper.LAYOUT_START) {
            right = layoutState.getOffset() - endSpace - (mLayoutWithAnchor || isEndLine ? 0 : mHGap);
            left = right - maxSize;
        } else {
            left = layoutState.getOffset() + startSpace + (mLayoutWithAnchor || isStartLine ? 0 : mHGap);
            right = left + maxSize;
        }
    }
    for (int i = 0; i < count; i++) {
        View view = mSet[i];
        final int index = mSpanIndices[i];
        LayoutParams params = (LayoutParams) view.getLayoutParams();
        if (layoutInVertical) {
            if (weighted) {
                left = helper.getPaddingLeft() + mMarginLeft + mPaddingLeft;
                for (int j = 0; j < index; j++) left += mSpanCols[j] + mHGap;
            } else
                left = helper.getPaddingLeft() + mMarginLeft + mPaddingLeft + mSizePerSpan * index + index * mHGap;
            right = left + orientationHelper.getDecoratedMeasurementInOther(view);
        } else {
            if (weighted) {
                top = helper.getPaddingTop() + mMarginTop + mPaddingTop;
                for (int j = 0; j < index; j++) top += mSpanCols[j] + mVGap;
            } else
                top = helper.getPaddingTop() + mMarginTop + mPaddingTop + mSizePerSpan * index + index * mVGap;
            bottom = top + orientationHelper.getDecoratedMeasurementInOther(view);
        }
        if (DEBUG) {
            Log.d(TAG, "layout item in position: " + params.getViewPosition() + " with text " + ((TextView) view).getText() + " with SpanIndex: " + index + " into (" + left + ", " + top + ", " + right + ", " + bottom + " )");
        }
        // We calculate everything with View's bounding box (which includes decor and margins)
        // To calculate correct layout position, we subtract margins.
        // modified by huifeng at 20160907, margins are already subtracted
        layoutChild(view, left, top, right, bottom, helper);
        // Consume the available space if the view is not removed OR changed
        if (params.isItemRemoved() || params.isItemChanged()) {
            result.mIgnoreConsumed = true;
        }
        result.mFocusable |= view.isFocusable();
    }
    mLayoutWithAnchor = false;
    Arrays.fill(mSet, null);
    Arrays.fill(mSpanIndices, 0);
    Arrays.fill(mSpanCols, 0);
}

Example 19 with OrientationHelper

use of android.support.v7.widget.OrientationHelper in project vlayout by alibaba.

the class StaggeredGridLayoutHelper method recycleFromStart.

private void recycleFromStart(RecyclerView.Recycler recycler, int line, LayoutManagerHelper helper) {
    final OrientationHelper orientationHelper = helper.getMainOrientationHelper();
    boolean changed = true;
    while (helper.getChildCount() > 0 && changed) {
        View child = helper.getChildAt(0);
        if (child != null && orientationHelper.getDecoratedEnd(child) < line) {
            LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int position = lp.getViewPosition();
            Span span = findSpan(position, child, true);
            if (span != null) {
                span.popStart(orientationHelper);
                helper.removeChildView(child);
                recycler.recycleView(child);
            } else {
                changed = false;
            }
        } else {
            // done
            return;
        }
    }
}

Example 20 with OrientationHelper

use of android.support.v7.widget.OrientationHelper in project vlayout by alibaba.

the class StaggeredGridLayoutHelper method recycle.

private void recycle(RecyclerView.Recycler recycler, LayoutStateWrapper layoutState, Span updatedSpan, int recycleLine, LayoutManagerHelper helper) {
    OrientationHelper orientation = helper.getMainOrientationHelper();
    if (layoutState.getLayoutDirection() == LAYOUT_START) {
        // calculate recycle line
        int maxStart = getMaxStart(updatedSpan.getStartLine(orientation), orientation);
        recycleFromEnd(recycler, Math.max(recycleLine, maxStart) + (orientation.getEnd() - orientation.getStartAfterPadding()), helper);
    } else {
        // calculate recycle line
        int minEnd = getMinEnd(updatedSpan.getEndLine(orientation), orientation);
        recycleFromStart(recycler, Math.min(recycleLine, minEnd) - (orientation.getEnd() - orientation.getStartAfterPadding()), helper);
    }
}