Example usage for android.view View getLeft

Introduction

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

Prototype

@ViewDebug.CapturedViewProperty
public final int getLeft() 

Source Link

Document

Left position of this view relative to its parent.

Usage

From source file:com.along.practice.widget.swipbacklayout.ViewDragHelper.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 *
 * @param v      View to test for horizontal scrollability
 * @param checkV Whether the view v passed should itself be checked for
 *               scrollability (true), or just its children (false).
 * @param dx     Delta scrolled in pixels along the X axis
 * @param dy     Delta scrolled in pixels along the Y axis
 * @param x      X coordinate of the active touch point
 * @param y      Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 *//*w  ww.j  a  v  a  2s .  c  om*/
protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance
        // first.
        for (int i = count - 1; i >= 0; i--) {
            //  Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, dy, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || ViewCompat.canScrollVertically(v, -dy));
}

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From source file:android.support.v17.leanback.widget.GridWidgetTest.java

private static int getCenterX(View v) {
    return (v.getLeft() + v.getRight()) / 2;
}

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From source file:android.widget.Gallery.java

/**
 * Tracks a motion scroll. In reality, this is used to do just about any
 * movement to items (touch scroll, arrow-key scroll, set an item as selected).
 * //from   ww w . j  a  v  a 2  s .c  om
 * @param deltaX Change in X from the previous event.
 */
void trackMotionScroll(int deltaX) {

    if (getChildCount() == 0) {
        return;
    }

    boolean toLeft = deltaX < 0;

    int limitedDeltaX = getLimitedMotionScrollAmount(toLeft, deltaX);
    if (limitedDeltaX != deltaX) {
        // The above call returned a limited amount, so stop any scrolls/flings
        mFlingRunnable.endFling(false);
        onFinishedMovement();
    }

    offsetChildrenLeftAndRight(limitedDeltaX);

    detachOffScreenChildren(toLeft);

    if (toLeft) {
        // If moved left, there will be empty space on the right
        fillToGalleryRight();
    } else {
        // Similarly, empty space on the left
        fillToGalleryLeft();
    }

    // Clear unused views
    mRecycler.clear();

    setSelectionToCenterChild();

    final View selChild = mSelectedChild;
    if (selChild != null) {
        final int childLeft = selChild.getLeft();
        final int childCenter = selChild.getWidth() / 2;
        final int galleryCenter = getWidth() / 2;
        mSelectedCenterOffset = childLeft + childCenter - galleryCenter;
    }

    onScrollChanged(0, 0, 0, 0); // dummy values, View's implementation does not use these.

    invalidate();
}

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From source file:com.baidayi.swipback.ViewDragHelper.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 * /*  w w  w  . ja  v  a  2  s. c  om*/
 * @param v
 *            View to test for horizontal scrollability
 * @param checkV
 *            Whether the view v passed should itself be checked for
 *            scrollability (true), or just its children (false).
 * @param dx
 *            Delta scrolled in pixels along the X axis
 * @param dy
 *            Delta scrolled in pixels along the Y axis
 * @param x
 *            X coordinate of the active touch point
 * @param y
 *            Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 */
protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance
        // first.
        for (int i = count - 1; i >= 0; i--) {
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, dy, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || ViewCompat.canScrollVertically(v, -dy));
}

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From source file:android.improving.utils.views.swipeback.ViewDragHelper.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 * /*from   w ww.j a v a2s.com*/
 * @param v
 *            View to test for horizontal scrollability
 * @param checkV
 *            Whether the view v passed should itself be checked for
 *            scrollability (true), or just its children (false).
 * @param dx
 *            Delta scrolled in pixels along the X axis
 * @param dy
 *            Delta scrolled in pixels along the Y axis
 * @param x
 *            X coordinate of the active touch point
 * @param y
 *            Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 */
protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance
        // first.
        for (int i = count - 1; i >= 0; i--) {
            // TODO: Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, dy, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || ViewCompat.canScrollVertically(v, -dy));
}

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From source file:com.zertinteractive.wallpaper.MainActivity.java

@SuppressWarnings("NewApi")
private void animateRevealHide(final View viewRoot) {
    int cx = (viewRoot.getLeft() + viewRoot.getRight()) / 2;
    int cy = (viewRoot.getTop() + viewRoot.getBottom()) / 2;
    int initialRadius = viewRoot.getWidth();

    android.animation.Animator anim = ViewAnimationUtils.createCircularReveal(viewRoot, cx, cy, initialRadius,
            0);//from w w  w . j  a  v a  2 s  . co  m
    anim.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(android.animation.Animator animation) {
            super.onAnimationEnd(animation);
            viewRoot.setVisibility(View.INVISIBLE);
        }
    });
    anim.setDuration(getResources().getInteger(R.integer.anim_duration_medium));
    anim.start();
}

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From source file:android.improving.utils.views.swipeback.ViewDragHelper.java

/**
 * Find the topmost child under the given point within the parent view's
 * coordinate system. The child order is determined using
 * {@link com.way.ui.swipeback.ViewDragHelper.Callback#getOrderedChildIndex(int)}
 * .//from ww  w  . java 2  s. c o  m
 * 
 * @param x
 *            X position to test in the parent's coordinate system
 * @param y
 *            Y position to test in the parent's coordinate system
 * @return The topmost child view under (x, y) or null if none found.
 */
public View findTopChildUnder(int x, int y) {
    final int childCount = mParentView.getChildCount();
    for (int i = childCount - 1; i >= 0; i--) {
        final View child = mParentView.getChildAt(mCallback.getOrderedChildIndex(i));
        if (x >= child.getLeft() && x < child.getRight() && y >= child.getTop() && y < child.getBottom()) {
            return child;
        }
    }
    return null;
}

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From source file:android.improving.utils.views.swipeback.ViewDragHelper.java

/**
 * Determine if the supplied view is under the given point in the parent
 * view's coordinate system.//www.j  ava 2s .c o  m
 * 
 * @param view
 *            Child view of the parent to hit test
 * @param x
 *            X position to test in the parent's coordinate system
 * @param y
 *            Y position to test in the parent's coordinate system
 * @return true if the supplied view is under the given point, false
 *         otherwise
 */
public boolean isViewUnder(View view, int x, int y) {
    if (view == null) {
        return false;
    }
    return x >= view.getLeft() && x < view.getRight() && y >= view.getTop() && y < view.getBottom();
}

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From source file:aksha.upcomingdemo.HorizontalListView.java

/** Adds children views to the left and right of the current views until the screen is full */
private void fillList(final int dx) {
    // Get the rightmost child and determine its right edge
    int edge = 0;
    View child = getRightmostChild();
    if (child != null) {
        edge = child.getRight();//  w  w  w  .j av  a  2s  .co  m
    }

    // Add new children views to the right, until past the edge of the screen
    fillListRight(edge, dx);

    // Get the leftmost child and determine its left edge
    edge = 0;
    child = getLeftmostChild();
    if (child != null) {
        edge = child.getLeft();
    }

    // Add new children views to the left, until past the edge of the screen
    fillListLeft(edge, dx);
}

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From source file:android.widget.Gallery.java

/**
 * Obtain a view, either by pulling an existing view from the recycler or by
 * getting a new one from the adapter. If we are animating, make sure there
 * is enough information in the view's layout parameters to animate from the
 * old to new positions.//from   w  ww . j a  va  2  s.  c o m
 * 
 * @param position Position in the gallery for the view to obtain
 * @param offset Offset from the selected position
 * @param x X-coordinate indicating where this view should be placed. This
 *        will either be the left or right edge of the view, depending on
 *        the fromLeft parameter
 * @param fromLeft Are we positioning views based on the left edge? (i.e.,
 *        building from left to right)?
 * @return A view that has been added to the gallery
 */
private View makeAndAddView(int position, int offset, int x, boolean fromLeft) {

    View child;
    if (!mDataChanged) {
        child = mRecycler.get(position);
        if (child != null) {
            // Can reuse an existing view
            int childLeft = child.getLeft();

            // Remember left and right edges of where views have been placed
            mRightMost = Math.max(mRightMost, childLeft + child.getMeasuredWidth());
            mLeftMost = Math.min(mLeftMost, childLeft);

            // Position the view
            setUpChild(child, offset, x, fromLeft);

            return child;
        }
    }

    // Nothing found in the recycler -- ask the adapter for a view
    child = mAdapter.getView(position, null, this);

    // Position the view
    setUpChild(child, offset, x, fromLeft);

    return child;
}

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