Examples with View android.view.View used on opensource projects

Example 11 with View

use of android.view.View in project Launcher3 by chislon.

the class Utilities method mapCoordInSelfToDescendent.

/**
     * Inverse of {@link #getDescendantCoordRelativeToSelf(View, int[])}.
     */
public static float mapCoordInSelfToDescendent(View descendant, View root, int[] coord) {
    ArrayList<View> ancestorChain = new ArrayList<View>();
    float[] pt = { coord[0], coord[1] };
    View v = descendant;
    while (v != root) {
        ancestorChain.add(v);
        v = (View) v.getParent();
    }
    ancestorChain.add(root);
    float scale = 1.0f;
    Matrix inverse = new Matrix();
    int count = ancestorChain.size();
    for (int i = count - 1; i >= 0; i--) {
        View ancestor = ancestorChain.get(i);
        View next = i > 0 ? ancestorChain.get(i - 1) : null;
        pt[0] += ancestor.getScrollX();
        pt[1] += ancestor.getScrollY();
        if (next != null) {
            pt[0] -= next.getLeft();
            pt[1] -= next.getTop();
            next.getMatrix().invert(inverse);
            inverse.mapPoints(pt);
            scale *= next.getScaleX();
        }
    }
    coord[0] = (int) Math.round(pt[0]);
    coord[1] = (int) Math.round(pt[1]);
    return scale;
}

Example 12 with View

use of android.view.View in project Launcher3 by chislon.

the class Utilities method getDescendantCoordRelativeToParent.

/**
     * Given a coordinate relative to the descendant, find the coordinate in a parent view's
     * coordinates.
     *
     * @param descendant The descendant to which the passed coordinate is relative.
     * @param root The root view to make the coordinates relative to.
     * @param coord The coordinate that we want mapped.
     * @param includeRootScroll Whether or not to account for the scroll of the descendant:
     *          sometimes this is relevant as in a child's coordinates within the descendant.
     * @return The factor by which this descendant is scaled relative to this DragLayer. Caution
     *         this scale factor is assumed to be equal in X and Y, and so if at any point this
     *         assumption fails, we will need to return a pair of scale factors.
     */
public static float getDescendantCoordRelativeToParent(View descendant, View root, int[] coord, boolean includeRootScroll) {
    ArrayList<View> ancestorChain = new ArrayList<View>();
    float[] pt = { coord[0], coord[1] };
    View v = descendant;
    while (v != root && v != null) {
        ancestorChain.add(v);
        v = (View) v.getParent();
    }
    ancestorChain.add(root);
    float scale = 1.0f;
    int count = ancestorChain.size();
    for (int i = 0; i < count; i++) {
        View v0 = ancestorChain.get(i);
        // which is very strange... ignore the scroll.
        if (v0 != descendant || includeRootScroll) {
            pt[0] -= v0.getScrollX();
            pt[1] -= v0.getScrollY();
        }
        v0.getMatrix().mapPoints(pt);
        pt[0] += v0.getLeft();
        pt[1] += v0.getTop();
        scale *= v0.getScaleX();
    }
    coord[0] = (int) Math.round(pt[0]);
    coord[1] = (int) Math.round(pt[1]);
    return scale;
}

Example 13 with View

use of android.view.View in project Launcher3 by chislon.

the class PagedView method onFlingToDelete.

public void onFlingToDelete(PointF vel) {
    final long startTime = AnimationUtils.currentAnimationTimeMillis();
    // NOTE: Because it takes time for the first frame of animation to actually be
    // called and we expect the animation to be a continuation of the fling, we have
    // to account for the time that has elapsed since the fling finished.  And since
    // we don't have a startDelay, we will always get call to update when we call
    // start() (which we want to ignore).
    final TimeInterpolator tInterpolator = new TimeInterpolator() {

        private int mCount = -1;

        private long mStartTime;

        private float mOffset;

        /* Anonymous inner class ctor */
        {
            mStartTime = startTime;
        }

        @Override
        public float getInterpolation(float t) {
            if (mCount < 0) {
                mCount++;
            } else if (mCount == 0) {
                mOffset = Math.min(0.5f, (float) (AnimationUtils.currentAnimationTimeMillis() - mStartTime) / FLING_TO_DELETE_FADE_OUT_DURATION);
                mCount++;
            }
            return Math.min(1f, mOffset + t);
        }
    };
    final Rect from = new Rect();
    final View dragView = mDragView;
    from.left = (int) dragView.getTranslationX();
    from.top = (int) dragView.getTranslationY();
    AnimatorUpdateListener updateCb = new FlingAlongVectorAnimatorUpdateListener(dragView, vel, from, startTime, FLING_TO_DELETE_FRICTION);
    final Runnable onAnimationEndRunnable = createPostDeleteAnimationRunnable(dragView);
    // Create and start the animation
    ValueAnimator mDropAnim = new ValueAnimator();
    mDropAnim.setInterpolator(tInterpolator);
    mDropAnim.setDuration(FLING_TO_DELETE_FADE_OUT_DURATION);
    mDropAnim.setFloatValues(0f, 1f);
    mDropAnim.addUpdateListener(updateCb);
    mDropAnim.addListener(new AnimatorListenerAdapter() {

        public void onAnimationEnd(Animator animation) {
            onAnimationEndRunnable.run();
        }
    });
    mDropAnim.start();
    mDeferringForDelete = true;
}

Example 14 with View

use of android.view.View in project Launcher3 by chislon.

the class PagedView method onRequestFocusInDescendants.

@Override
protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
    int focusablePage;
    if (mNextPage != INVALID_PAGE) {
        focusablePage = mNextPage;
    } else {
        focusablePage = mCurrentPage;
    }
    View v = getPageAt(focusablePage);
    if (v != null) {
        return v.requestFocus(direction, previouslyFocusedRect);
    }
    return false;
}

Example 15 with View

use of android.view.View in project Launcher3 by chislon.

the class PagedView method dispatchDraw.

@Override
protected void dispatchDraw(Canvas canvas) {
    int halfScreenSize = getViewportWidth() / 2;
    // mOverScrollX is equal to getScrollX() when we're within the normal scroll range.
    // Otherwise it is equal to the scaled overscroll position.
    int screenCenter = mOverScrollX + halfScreenSize;
    if (screenCenter != mLastScreenCenter || mForceScreenScrolled) {
        // set mForceScreenScrolled before calling screenScrolled so that screenScrolled can
        // set it for the next frame
        mForceScreenScrolled = false;
        screenScrolled(screenCenter);
        mLastScreenCenter = screenCenter;
    }
    // Find out which screens are visible; as an optimization we only call draw on them
    final int pageCount = getChildCount();
    if (pageCount > 0) {
        getVisiblePages(mTempVisiblePagesRange);
        final int leftScreen = mTempVisiblePagesRange[0];
        final int rightScreen = mTempVisiblePagesRange[1];
        if (leftScreen != -1 && rightScreen != -1) {
            final long drawingTime = getDrawingTime();
            // Clip to the bounds
            canvas.save();
            canvas.clipRect(getScrollX(), getScrollY(), getScrollX() + getRight() - getLeft(), getScrollY() + getBottom() - getTop());
            // Draw all the children, leaving the drag view for last
            for (int i = pageCount - 1; i >= 0; i--) {
                final View v = getPageAt(i);
                if (v == mDragView)
                    continue;
                if (mForceDrawAllChildrenNextFrame || (leftScreen <= i && i <= rightScreen && shouldDrawChild(v))) {
                    drawChild(canvas, v, drawingTime);
                }
            }
            // Draw the drag view on top (if there is one)
            if (mDragView != null) {
                drawChild(canvas, mDragView, drawingTime);
            }
            mForceDrawAllChildrenNextFrame = false;
            canvas.restore();
        }
    }
}