Example usage for android.view View layout

List of usage examples for android.view View layout

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Introduction

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

Prototype

@SuppressWarnings({ "unchecked" })
public void layout(int l, int t, int r, int b)

Source Link

Document

Assign a size and position to a view and all of its descendants

This is the second phase of the layout mechanism.

Usage

From source file:com.tylz.jiaoyanglogistics.view.LazyViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;//  w  w  w.ja v a  2  s  .  co m
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();

    int decorCount = 0;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                if (DEBUG) {
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                }
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}

From source file:org.immopoly.android.widget.ViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;/*from   ww  w  .j a  v  a2 s . c  om*/
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = forcedChildWidth > 0 ? forcedChildWidth : r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();

    int decorCount = 0;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}

From source file:beichen.douban.ui.view.LazyViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;//  w ww .  ja  v a2 s  .  com
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();

    int decorCount = 0;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}

From source file:android.support.v7.internal.widget.ActionBarView.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    int x = getPaddingLeft();
    final int y = getPaddingTop();
    final int contentHeight = b - t - getPaddingTop() - getPaddingBottom();

    if (contentHeight <= 0) {
        // Nothing to do if we can't see anything.
        return;//from www  .j a v  a2s  . co  m
    }

    HomeView homeLayout = mExpandedActionView != null ? mExpandedHomeLayout : mHomeLayout;
    if (homeLayout.getVisibility() != GONE) {
        final int leftOffset = homeLayout.getLeftOffset();
        x += positionChild(homeLayout, x + leftOffset, y, contentHeight) + leftOffset;
    }

    if (mExpandedActionView == null) {
        final boolean showTitle = mTitleLayout != null && mTitleLayout.getVisibility() != GONE
                && (mDisplayOptions & ActionBar.DISPLAY_SHOW_TITLE) != 0;
        if (showTitle) {
            x += positionChild(mTitleLayout, x, y, contentHeight);
        }

        switch (mNavigationMode) {
        case ActionBar.NAVIGATION_MODE_STANDARD:
            break;
        case ActionBar.NAVIGATION_MODE_LIST:
            if (mListNavLayout != null) {
                if (showTitle) {
                    x += mItemPadding;
                }
                x += positionChild(mListNavLayout, x, y, contentHeight) + mItemPadding;
            }
            break;
        case ActionBar.NAVIGATION_MODE_TABS:
            if (mTabScrollView != null) {
                if (showTitle) {
                    x += mItemPadding;
                }
                x += positionChild(mTabScrollView, x, y, contentHeight) + mItemPadding;
            }
            break;
        }
    }

    int menuLeft = r - l - getPaddingRight();
    if (mMenuView != null && mMenuView.getParent() == this) {
        positionChildInverse(mMenuView, menuLeft, y, contentHeight);
        menuLeft -= mMenuView.getMeasuredWidth();
    }

    if (mIndeterminateProgressView != null && mIndeterminateProgressView.getVisibility() != GONE) {
        positionChildInverse(mIndeterminateProgressView, menuLeft, y, contentHeight);
        menuLeft -= mIndeterminateProgressView.getMeasuredWidth();
    }

    View customView = null;
    if (mExpandedActionView != null) {
        customView = mExpandedActionView;
    } else if ((mDisplayOptions & ActionBar.DISPLAY_SHOW_CUSTOM) != 0 && mCustomNavView != null) {
        customView = mCustomNavView;
    }
    if (customView != null) {
        ViewGroup.LayoutParams lp = customView.getLayoutParams();
        final ActionBar.LayoutParams ablp = lp instanceof ActionBar.LayoutParams ? (ActionBar.LayoutParams) lp
                : null;

        final int gravity = ablp != null ? ablp.gravity : DEFAULT_CUSTOM_GRAVITY;
        final int navWidth = customView.getMeasuredWidth();

        int topMargin = 0;
        int bottomMargin = 0;
        if (ablp != null) {
            x += ablp.leftMargin;
            menuLeft -= ablp.rightMargin;
            topMargin = ablp.topMargin;
            bottomMargin = ablp.bottomMargin;
        }

        int hgravity = gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
        // See if we actually have room to truly center; if not push against left or right.
        if (hgravity == Gravity.CENTER_HORIZONTAL) {
            final int centeredLeft = (getWidth() - navWidth) / 2;
            if (centeredLeft < x) {
                hgravity = Gravity.LEFT;
            } else if (centeredLeft + navWidth > menuLeft) {
                hgravity = Gravity.RIGHT;
            }
        } else if (gravity == -1) {
            hgravity = Gravity.LEFT;
        }

        int xpos = 0;
        switch (hgravity) {
        case Gravity.CENTER_HORIZONTAL:
            xpos = (getWidth() - navWidth) / 2;
            break;
        case Gravity.LEFT:
            xpos = x;
            break;
        case Gravity.RIGHT:
            xpos = menuLeft - navWidth;
            break;
        }

        int vgravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;

        if (gravity == -1) {
            vgravity = Gravity.CENTER_VERTICAL;
        }

        int ypos = 0;
        switch (vgravity) {
        case Gravity.CENTER_VERTICAL:
            final int paddedTop = getPaddingTop();
            final int paddedBottom = getHeight() - getPaddingBottom();
            ypos = ((paddedBottom - paddedTop) - customView.getMeasuredHeight()) / 2;
            break;
        case Gravity.TOP:
            ypos = getPaddingTop() + topMargin;
            break;
        case Gravity.BOTTOM:
            ypos = getHeight() - getPaddingBottom() - customView.getMeasuredHeight() - bottomMargin;
            break;
        }
        final int customWidth = customView.getMeasuredWidth();
        customView.layout(xpos, ypos, xpos + customWidth, ypos + customView.getMeasuredHeight());
        x += customWidth;
    }

    if (mProgressView != null) {
        mProgressView.bringToFront();
        final int halfProgressHeight = mProgressView.getMeasuredHeight() / 2;
        mProgressView.layout(mProgressBarPadding, -halfProgressHeight,
                mProgressBarPadding + mProgressView.getMeasuredWidth(), halfProgressHeight);
    }
}

From source file:com.actionbarsherlock.internal.widget.ActionBarView.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    int x = getPaddingLeft();
    final int y = getPaddingTop();
    final int contentHeight = b - t - getPaddingTop() - getPaddingBottom();

    if (contentHeight <= 0) {
        // Nothing to do if we can't see anything.
        return;/*w  w  w  .java2 s  . c  o m*/
    }

    HomeView homeLayout = mExpandedActionView != null ? mExpandedHomeLayout : mHomeLayout;
    if (homeLayout.getVisibility() != GONE) {
        final int leftOffset = homeLayout.getLeftOffset();
        x += positionChild(homeLayout, x + leftOffset, y, contentHeight) + leftOffset;
    }

    if (mExpandedActionView == null) {
        final boolean showTitle = mTitleLayout != null && mTitleLayout.getVisibility() != GONE
                && (mDisplayOptions & ActionBar.DISPLAY_SHOW_TITLE) != 0;
        if (showTitle) {
            x += positionChild(mTitleLayout, x, y, contentHeight);
        }

        switch (mNavigationMode) {
        case ActionBar.NAVIGATION_MODE_STANDARD:
            break;
        case ActionBar.NAVIGATION_MODE_LIST:
            if (mListNavLayout != null) {
                if (showTitle)
                    x += mItemPadding;
                x += positionChild(mListNavLayout, x, y, contentHeight) + mItemPadding;
            }
            break;
        case ActionBar.NAVIGATION_MODE_TABS:
            if (mTabScrollView != null) {
                if (showTitle)
                    x += mItemPadding;
                x += positionChild(mTabScrollView, x, y, contentHeight) + mItemPadding;
            }
            break;
        }
    }

    int menuLeft = r - l - getPaddingRight();
    if (mMenuView != null && mMenuView.getParent() == this) {
        positionChildInverse(mMenuView, menuLeft, y, contentHeight);
        menuLeft -= mMenuView.getMeasuredWidth();
    }

    if (mIndeterminateProgressView != null && mIndeterminateProgressView.getVisibility() != GONE) {
        positionChildInverse(mIndeterminateProgressView, menuLeft, y, contentHeight);
        menuLeft -= mIndeterminateProgressView.getMeasuredWidth();
    }

    View customView = null;
    if (mExpandedActionView != null) {
        customView = mExpandedActionView;
    } else if ((mDisplayOptions & ActionBar.DISPLAY_SHOW_CUSTOM) != 0 && mCustomNavView != null) {
        customView = mCustomNavView;
    }
    if (customView != null) {
        ViewGroup.LayoutParams lp = customView.getLayoutParams();
        final ActionBar.LayoutParams ablp = lp instanceof ActionBar.LayoutParams ? (ActionBar.LayoutParams) lp
                : null;

        final int gravity = ablp != null ? ablp.gravity : DEFAULT_CUSTOM_GRAVITY;
        final int navWidth = customView.getMeasuredWidth();

        int topMargin = 0;
        int bottomMargin = 0;
        if (ablp != null) {
            x += ablp.leftMargin;
            menuLeft -= ablp.rightMargin;
            topMargin = ablp.topMargin;
            bottomMargin = ablp.bottomMargin;
        }

        int hgravity = gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
        // See if we actually have room to truly center; if not push against left or right.
        if (hgravity == Gravity.CENTER_HORIZONTAL) {
            final int centeredLeft = ((getRight() - getLeft()) - navWidth) / 2;
            if (centeredLeft < x) {
                hgravity = Gravity.LEFT;
            } else if (centeredLeft + navWidth > menuLeft) {
                hgravity = Gravity.RIGHT;
            }
        } else if (gravity == -1) {
            hgravity = Gravity.LEFT;
        }

        int xpos = 0;
        switch (hgravity) {
        case Gravity.CENTER_HORIZONTAL:
            xpos = ((getRight() - getLeft()) - navWidth) / 2;
            break;
        case Gravity.LEFT:
            xpos = x;
            break;
        case Gravity.RIGHT:
            xpos = menuLeft - navWidth;
            break;
        }

        int vgravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;

        if (gravity == -1) {
            vgravity = Gravity.CENTER_VERTICAL;
        }

        int ypos = 0;
        switch (vgravity) {
        case Gravity.CENTER_VERTICAL:
            final int paddedTop = getPaddingTop();
            final int paddedBottom = getBottom() - getTop() - getPaddingBottom();
            ypos = ((paddedBottom - paddedTop) - customView.getMeasuredHeight()) / 2;
            break;
        case Gravity.TOP:
            ypos = getPaddingTop() + topMargin;
            break;
        case Gravity.BOTTOM:
            ypos = getHeight() - getPaddingBottom() - customView.getMeasuredHeight() - bottomMargin;
            break;
        }
        final int customWidth = customView.getMeasuredWidth();
        customView.layout(xpos, ypos, xpos + customWidth, ypos + customView.getMeasuredHeight());
        x += customWidth;
    }

    if (mProgressView != null) {
        mProgressView.bringToFront();
        final int halfProgressHeight = mProgressView.getMeasuredHeight() / 2;
        mProgressView.layout(mProgressBarPadding, -halfProgressHeight,
                mProgressBarPadding + mProgressView.getMeasuredWidth(), halfProgressHeight);
    }
}

From source file:javalibrary.android.ui.VerticalViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;/*from  w w w .  j  a va2s  .  c o  m*/
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();
    final int scrollY = getScrollY();

    int decorCount = 0;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                //                    childLeft += scrollX;
                childTop += scrollY;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                /*int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;*/
                int loff = (height + mPageMargin) * ii.position;
                childLeft = paddingLeft;
                childTop = paddingTop + loff;
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}

From source file:cn.ieclipse.af.view.StaggeredGridView.java

/**
 * Should be called with mPopulating set to true
 *
 * @param fromPosition Position to start filling from
 * @param overhang the number of extra pixels to fill beyond the current top edge
 * @return the max overhang beyond the beginning of the view of any added items at the top
 *//*from   ww  w . ja  v a2 s .  c  o m*/
final int fillUp(int fromPosition, int overhang) {
    final int paddingLeft = getPaddingLeft();
    final int paddingRight = getPaddingRight();
    final int itemMargin = mItemMargin;
    final int colWidth = (getWidth() - paddingLeft - paddingRight - itemMargin * (mColCount - 1)) / mColCount;
    final int gridTop = getPaddingTop();
    final int fillTo = gridTop - overhang;
    int nextCol = getNextColumnUp();
    int position = fromPosition;

    while (nextCol >= 0 && mItemTops[nextCol] > fillTo && position >= 0) {
        final View child = obtainView(position, null);
        LayoutParams lp = (LayoutParams) child.getLayoutParams();

        if (child.getParent() != this) {
            if (mInLayout) {
                addViewInLayout(child, 0, lp);
            } else {
                addView(child, 0);
            }
        }

        final int span = Math.min(mColCount, lp.span);
        final int widthSize = colWidth * span + itemMargin * (span - 1);
        final int widthSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.EXACTLY);

        LayoutRecord rec;
        if (span > 1) {
            rec = getNextRecordUp(position, span);
            nextCol = rec.column;
        } else {
            rec = mLayoutRecords.get(position);
        }

        boolean invalidateBefore = false;
        if (rec == null) {
            rec = new LayoutRecord();
            mLayoutRecords.put(position, rec);
            rec.column = nextCol;
            rec.span = span;
        } else if (span != rec.span) {
            rec.span = span;
            rec.column = nextCol;
            invalidateBefore = true;
        } else {
            nextCol = rec.column;
        }

        if (mHasStableIds) {
            final long id = mAdapter.getItemId(position);
            rec.id = id;
            lp.id = id;
        }

        lp.column = nextCol;

        final int heightSpec;
        if (lp.height == LayoutParams.WRAP_CONTENT) {
            heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
        } else {
            heightSpec = MeasureSpec.makeMeasureSpec(lp.height, MeasureSpec.EXACTLY);
        }
        child.measure(widthSpec, heightSpec);

        final int childHeight = child.getMeasuredHeight();
        if (invalidateBefore || (childHeight != rec.height && rec.height > 0)) {
            invalidateLayoutRecordsBeforePosition(position);
        }
        rec.height = childHeight;

        final int startFrom;
        if (span > 1) {
            int highest = mItemTops[nextCol];
            for (int i = nextCol + 1; i < nextCol + span; i++) {
                final int top = mItemTops[i];
                if (top < highest) {
                    highest = top;
                }
            }
            startFrom = highest;
        } else {
            startFrom = mItemTops[nextCol];
        }
        final int childBottom = startFrom;
        final int childTop = childBottom - childHeight;
        final int childLeft = paddingLeft + nextCol * (colWidth + itemMargin);
        final int childRight = childLeft + child.getMeasuredWidth();
        child.layout(childLeft, childTop, childRight, childBottom);

        for (int i = nextCol; i < nextCol + span; i++) {
            mItemTops[i] = childTop - rec.getMarginAbove(i - nextCol) - itemMargin;
        }

        nextCol = getNextColumnUp();
        mFirstPosition = position--;
    }

    int highestView = getHeight();
    for (int i = 0; i < mColCount; i++) {
        if (mItemTops[i] < highestView) {
            highestView = mItemTops[i];
        }
    }
    return gridTop - highestView;
}

From source file:cn.ieclipse.af.view.StaggeredGridView.java

/**
 * Should be called with mPopulating set to true
 *
 * @param fromPosition Position to start filling from
 * @param overhang the number of extra pixels to fill beyond the current bottom edge
 * @return the max overhang beyond the end of the view of any added items at the bottom
 *//*from   w  w  w .  jav a 2 s .com*/
final int fillDown(int fromPosition, int overhang) {
    final int paddingLeft = getPaddingLeft();
    final int paddingRight = getPaddingRight();
    final int itemMargin = mItemMargin;
    final int colWidth = (getWidth() - paddingLeft - paddingRight - itemMargin * (mColCount - 1)) / mColCount;
    final int gridBottom = getHeight() - getPaddingBottom();
    final int fillTo = gridBottom + overhang;
    int nextCol = getNextColumnDown();
    int position = fromPosition;

    while (nextCol >= 0 && mItemBottoms[nextCol] < fillTo && position < mItemCount) {
        final View child = obtainView(position, null);
        LayoutParams lp = (LayoutParams) child.getLayoutParams();

        if (child.getParent() != this) {
            if (mInLayout) {
                addViewInLayout(child, -1, lp);
            } else {
                addView(child);
            }
        }

        final int span = Math.min(mColCount, lp.span);
        final int widthSize = colWidth * span + itemMargin * (span - 1);
        final int widthSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.EXACTLY);

        LayoutRecord rec;
        if (span > 1) {
            rec = getNextRecordDown(position, span);
            nextCol = rec.column;
        } else {
            rec = mLayoutRecords.get(position);
        }

        boolean invalidateAfter = false;
        if (rec == null) {
            rec = new LayoutRecord();
            mLayoutRecords.put(position, rec);
            rec.column = nextCol;
            rec.span = span;
        } else if (span != rec.span) {
            rec.span = span;
            rec.column = nextCol;
            invalidateAfter = true;
        } else {
            nextCol = rec.column;
        }

        if (mHasStableIds) {
            final long id = mAdapter.getItemId(position);
            rec.id = id;
            lp.id = id;
        }

        lp.column = nextCol;

        final int heightSpec;
        if (lp.height == LayoutParams.WRAP_CONTENT) {
            heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
        } else {
            heightSpec = MeasureSpec.makeMeasureSpec(lp.height, MeasureSpec.EXACTLY);
        }
        child.measure(widthSpec, heightSpec);

        final int childHeight = child.getMeasuredHeight();
        if (invalidateAfter || (childHeight != rec.height && rec.height > 0)) {
            invalidateLayoutRecordsAfterPosition(position);
        }
        rec.height = childHeight;

        final int startFrom;
        if (span > 1) {
            int lowest = mItemBottoms[nextCol];
            for (int i = nextCol + 1; i < nextCol + span; i++) {
                final int bottom = mItemBottoms[i];
                if (bottom > lowest) {
                    lowest = bottom;
                }
            }
            startFrom = lowest;
        } else {
            startFrom = mItemBottoms[nextCol];
        }
        final int childTop = startFrom + itemMargin;
        final int childBottom = childTop + childHeight;
        final int childLeft = paddingLeft + nextCol * (colWidth + itemMargin);
        final int childRight = childLeft + child.getMeasuredWidth();
        child.layout(childLeft, childTop, childRight, childBottom);

        for (int i = nextCol; i < nextCol + span; i++) {
            mItemBottoms[i] = childBottom + rec.getMarginBelow(i - nextCol);
        }

        nextCol = getNextColumnDown();
        position++;
    }

    int lowestView = 0;
    for (int i = 0; i < mColCount; i++) {
        if (mItemBottoms[i] > lowestView) {
            lowestView = mItemBottoms[i];
        }
    }
    return lowestView - gridBottom;
}

From source file:administrator.example.com.myscrollview.VerticalViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;/*from   ww w  .  ja va2 s. com*/
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollY = getScrollY();

    int decorCount = 0;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                //XXX isDecorfalse
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                } /* end of switch */
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                } /* end of switch */

                //XXX y?
                childTop += scrollY;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                //XXX ViewPager??
                int toff = (height + mPageMargin) * ii.position;
                childLeft = paddingLeft;
                childTop = paddingTop + toff;

                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } /* end of if */
        } /* end of if */
    } /* end of for */

    //XXX ?
    mLeftPageBounds = paddingLeft;
    mRightPageBounds = width - paddingRight;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}

From source file:com.bluetoothlamp.tiny.view.verticalview.VerticalViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;/*from   w w  w. j  av  a2  s .c o m*/
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollY = getScrollY();

    int decorCount = 0;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                //XXX isDecor??alse??
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                } /* end of switch */
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                } /* end of switch */

                //XXX y??
                childTop += scrollY;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                //XXX ViewPager
                int toff = (height + mPageMargin) * ii.position;
                childLeft = paddingLeft;
                childTop = paddingTop + toff;

                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } /* end of if */
        } /* end of if */
    } /* end of for */

    //XXX 
    mLeftPageBounds = paddingLeft;
    mRightPageBounds = width - paddingRight;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}