Example usage for android.view VelocityTracker obtain

List of usage examples for android.view VelocityTracker obtain

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Introduction

In this page you can find the example usage for android.view VelocityTracker obtain.

Prototype

static public VelocityTracker obtain()

Source Link

Document

Retrieve a new VelocityTracker object to watch the velocity of a motion.

Usage

From source file:com.castro.tops.swipelistview.SwipeListViewTouchListener.java

/**
 * @see View.OnTouchListener#onTouch(android.view.View,
 *      android.view.MotionEvent)//ww  w  . j  av  a 2s  .c o  m
 */
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
    if (!isSwipeEnabled()) {
        return false;
    }

    if (viewWidth < 2) {
        viewWidth = swipeListView.getWidth();
    }

    switch (MotionEventCompat.getActionMasked(motionEvent)) {
    case MotionEvent.ACTION_DOWN: {
        if (paused && downPosition != ListView.INVALID_POSITION) {
            return false;
        }
        swipeCurrentAction = SwipeListView.SWIPE_ACTION_NONE;

        int childCount = swipeListView.getChildCount();
        int[] listViewCoords = new int[2];
        swipeListView.getLocationOnScreen(listViewCoords);
        int x = (int) motionEvent.getRawX() - listViewCoords[0];
        int y = (int) motionEvent.getRawY() - listViewCoords[1];
        View child;
        for (int i = 0; i < childCount; i++) {
            child = swipeListView.getChildAt(i);
            child.getHitRect(rect);

            int childPosition = swipeListView.getPositionForView(child);

            // dont allow swiping if this is on the header or footer or
            // IGNORE_ITEM_VIEW_TYPE or enabled is false on the adapter
            boolean allowSwipe = swipeListView.getAdapter().isEnabled(childPosition)
                    && swipeListView.getAdapter().getItemViewType(childPosition) >= 0;

            if (allowSwipe && rect.contains(x, y)) {
                setParentView(child);
                setFrontView(child.findViewById(swipeFrontView));

                downX = motionEvent.getRawX();
                downPosition = childPosition;

                frontView.setClickable(!opened.get(downPosition));
                frontView.setLongClickable(!opened.get(downPosition));

                velocityTracker = VelocityTracker.obtain();
                velocityTracker.addMovement(motionEvent);
                if (swipeBackView > 0) {
                    setBackView(child.findViewById(swipeBackView));
                }
                break;
            }
        }
        view.onTouchEvent(motionEvent);
        return true;
    }

    case MotionEvent.ACTION_UP: {
        if (velocityTracker == null || !swiping || downPosition == ListView.INVALID_POSITION) {
            break;
        }

        float deltaX = motionEvent.getRawX() - downX;
        velocityTracker.addMovement(motionEvent);
        velocityTracker.computeCurrentVelocity(1000);
        float velocityX = Math.abs(velocityTracker.getXVelocity());
        if (!opened.get(downPosition)) {
            if (swipeMode == SwipeListView.SWIPE_MODE_LEFT && velocityTracker.getXVelocity() > 0) {
                velocityX = 0;
            }
            if (swipeMode == SwipeListView.SWIPE_MODE_RIGHT && velocityTracker.getXVelocity() < 0) {
                velocityX = 0;
            }
        }
        float velocityY = Math.abs(velocityTracker.getYVelocity());
        boolean swap = false;
        boolean swapRight = false;
        if (minFlingVelocity <= velocityX && velocityX <= maxFlingVelocity && velocityY * 2 < velocityX) {
            swapRight = velocityTracker.getXVelocity() > 0;
            Log.d("SwipeListView", "swapRight: " + swapRight + " - swipingRight: " + swipingRight);
            if (swapRight != swipingRight && swipeActionLeft != swipeActionRight) {
                swap = false;
            } else if (opened.get(downPosition) && openedRight.get(downPosition) && swapRight) {
                swap = false;
            } else if (opened.get(downPosition) && !openedRight.get(downPosition) && !swapRight) {
                swap = false;
            } else {
                swap = true;
            }
        } else if (Math.abs(deltaX) > viewWidth / 2) {
            swap = true;
            swapRight = deltaX > 0;
        }
        generateAnimate(frontView, swap, swapRight, downPosition);
        if (swipeCurrentAction == SwipeListView.SWIPE_ACTION_CHOICE) {
            swapChoiceState(downPosition);
        }

        velocityTracker.recycle();
        velocityTracker = null;
        downX = 0;
        // change clickable front view
        // if (swap) {
        // frontView.setClickable(opened.get(downPosition));
        // frontView.setLongClickable(opened.get(downPosition));
        // }
        swiping = false;
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        if (velocityTracker == null || paused || downPosition == ListView.INVALID_POSITION) {
            break;
        }

        velocityTracker.addMovement(motionEvent);
        velocityTracker.computeCurrentVelocity(1000);
        float velocityX = Math.abs(velocityTracker.getXVelocity());
        float velocityY = Math.abs(velocityTracker.getYVelocity());

        float deltaX = motionEvent.getRawX() - downX;
        float deltaMode = Math.abs(deltaX);

        int swipeMode = this.swipeMode;
        int changeSwipeMode = swipeListView.changeSwipeMode(downPosition);
        if (changeSwipeMode >= 0) {
            swipeMode = changeSwipeMode;
        }

        if (swipeMode == SwipeListView.SWIPE_MODE_NONE) {
            deltaMode = 0;
        } else if (swipeMode != SwipeListView.SWIPE_MODE_BOTH) {
            if (opened.get(downPosition)) {
                if (swipeMode == SwipeListView.SWIPE_MODE_LEFT && deltaX < 0) {
                    deltaMode = 0;
                } else if (swipeMode == SwipeListView.SWIPE_MODE_RIGHT && deltaX > 0) {
                    deltaMode = 0;
                }
            } else {
                if (swipeMode == SwipeListView.SWIPE_MODE_LEFT && deltaX > 0) {
                    deltaMode = 0;
                } else if (swipeMode == SwipeListView.SWIPE_MODE_RIGHT && deltaX < 0) {
                    deltaMode = 0;
                }
            }
        }
        if (deltaMode > slop && swipeCurrentAction == SwipeListView.SWIPE_ACTION_NONE
                && velocityY < velocityX) {
            swiping = true;
            swipingRight = (deltaX > 0);
            Log.d("SwipeListView", "deltaX: " + deltaX + " - swipingRight: " + swipingRight);
            if (opened.get(downPosition)) {
                swipeListView.onStartClose(downPosition, swipingRight);
                swipeCurrentAction = SwipeListView.SWIPE_ACTION_REVEAL;
            } else {
                if (swipingRight && swipeActionRight == SwipeListView.SWIPE_ACTION_DISMISS) {
                    swipeCurrentAction = SwipeListView.SWIPE_ACTION_DISMISS;
                } else if (!swipingRight && swipeActionLeft == SwipeListView.SWIPE_ACTION_DISMISS) {
                    swipeCurrentAction = SwipeListView.SWIPE_ACTION_DISMISS;
                } else if (swipingRight && swipeActionRight == SwipeListView.SWIPE_ACTION_CHOICE) {
                    swipeCurrentAction = SwipeListView.SWIPE_ACTION_CHOICE;
                } else if (!swipingRight && swipeActionLeft == SwipeListView.SWIPE_ACTION_CHOICE) {
                    swipeCurrentAction = SwipeListView.SWIPE_ACTION_CHOICE;
                } else {
                    swipeCurrentAction = SwipeListView.SWIPE_ACTION_REVEAL;
                }
                swipeListView.onStartOpen(downPosition, swipeCurrentAction, swipingRight);
            }
            swipeListView.requestDisallowInterceptTouchEvent(true);
            MotionEvent cancelEvent = MotionEvent.obtain(motionEvent);
            cancelEvent.setAction(MotionEvent.ACTION_CANCEL | (MotionEventCompat
                    .getActionIndex(motionEvent) << MotionEventCompat.ACTION_POINTER_INDEX_SHIFT));
            swipeListView.onTouchEvent(cancelEvent);
            if (swipeCurrentAction == SwipeListView.SWIPE_ACTION_CHOICE) {
                backView.setVisibility(View.GONE);
            }
        }

        if (swiping && downPosition != ListView.INVALID_POSITION) {
            if (opened.get(downPosition)) {
                deltaX += openedRight.get(downPosition) ? viewWidth - rightOffset : -viewWidth + leftOffset;
            }
            move(deltaX);
            return true;
        }
        break;
    }
    }
    return false;
}

From source file:com.hb.hkm.slidinglayer.SlidLayer.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {

    if (!mEnabled) {
        return false;
    }//from   w w w . ja  v a2s .co  m

    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;

    if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) {
        mIsDragging = false;
        mIsUnableToDrag = false;
        mActivePointerId = INVALID_VALUE;
        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
        return false;
    }

    if (action != MotionEvent.ACTION_DOWN) {
        if (mIsDragging) {
            return true;
        } else if (mIsUnableToDrag) {
            return false;
        }
    }

    switch (action) {
    case MotionEvent.ACTION_MOVE:
        final int activePointerId = mActivePointerId;
        if (activePointerId == INVALID_VALUE) {
            break;
        }

        final int pointerIndex = MotionEventCompat.findPointerIndex(ev, activePointerId);
        if (pointerIndex == INVALID_VALUE) {
            mActivePointerId = INVALID_VALUE;
            break;
        }

        final float x = MotionEventCompat.getX(ev, pointerIndex);
        final float xDiff = Math.abs(x - mLastX);
        final float y = MotionEventCompat.getY(ev, pointerIndex);
        final float yDiff = Math.abs(y - mLastY);

        final boolean validHorizontalDrag = xDiff > mTouchSlop && xDiff > yDiff;
        final boolean validVerticalDrag = yDiff > mTouchSlop && yDiff > xDiff;

        if (validHorizontalDrag) {
            mLastX = x;
        } else if (validVerticalDrag) {
            mLastY = y;
        }

        if (validHorizontalDrag || validVerticalDrag) {
            mIsDragging = true;
            setDrawingCacheEnabled(true);
        }
        break;

    case MotionEvent.ACTION_DOWN:
        mActivePointerId = ev.getAction() & (Build.VERSION.SDK_INT >= 8 ? MotionEvent.ACTION_POINTER_INDEX_MASK
                : MotionEventCompat.ACTION_POINTER_INDEX_MASK);
        mLastX = mInitialX = MotionEventCompat.getX(ev, mActivePointerId);
        mLastY = mInitialY = MotionEventCompat.getY(ev, mActivePointerId);
        if (allowSlidingFromHere(mInitialX, mInitialY)) {
            mIsDragging = false;
            mIsUnableToDrag = false;
            // If nobody else got the focus we use it to close the layer
            return super.onInterceptTouchEvent(ev);
        } else {
            mIsUnableToDrag = true;
        }
        break;
    case MotionEventCompat.ACTION_POINTER_UP:
        onSecondaryPointerUp(ev);
        break;
    }

    if (!mIsDragging) {
        if (mVelocityTracker == null) {
            mVelocityTracker = VelocityTracker.obtain();
        }
        mVelocityTracker.addMovement(ev);
    }

    return mIsDragging;
}

From source file:com.klinker.android.sliding.MultiShrinkScroller.java

/**
 * Catch the touch event and act on it./*from  w  w  w.  jav a  2 s .co  m*/
 * @param event the touch event.
 */
@Override
public boolean onTouchEvent(MotionEvent event) {
    if (isTouchDisabledForDismissAnimation)
        return true;

    final int action = event.getAction();

    if (velocityTracker == null) {
        velocityTracker = VelocityTracker.obtain();
    }
    velocityTracker.addMovement(event);

    if (!isBeingDragged) {
        if (shouldStartDrag(event)) {
            return true;
        }

        if (action == MotionEvent.ACTION_UP && receivedDown) {
            receivedDown = false;
            return performClick();
        }
        return true;
    }

    switch (action) {
    case MotionEvent.ACTION_MOVE:
        final float delta = updatePositionAndComputeDelta(event);
        scrollTo(0, getScroll() + (int) delta);
        receivedDown = false;

        if (isBeingDragged) {
            final int distanceFromMaxScrolling = getMaximumScrollUpwards() - getScroll();
            if (delta > distanceFromMaxScrolling && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                // The ScrollView is being pulled upwards while there is no more
                // content offscreen, and the view port is already fully expanded.
                edgeGlowBottom.onPull(delta / getHeight(), 1 - event.getX() / getWidth());
            }

            if (!edgeGlowBottom.isFinished()) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                    postInvalidateOnAnimation();
                } else {
                    postInvalidate();
                }
            }

            if (shouldDismissOnScroll()) {
                scrollOffBottom();
            }

        }
        break;

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL:
        stopDrag(action == MotionEvent.ACTION_CANCEL);
        receivedDown = false;
        break;
    }

    return true;
}

From source file:com.wunderlist.slidinglayer.SlidingLayer.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {

    if (!mEnabled) {
        return false;
    }/*from   w w  w.  j  a  va  2 s . c o  m*/

    final int action = ev.getAction() & MotionEvent.ACTION_MASK;

    if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) {
        mIsDragging = false;
        mIsUnableToDrag = false;
        mActivePointerId = INVALID_VALUE;
        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
        return false;
    }

    if (action != MotionEvent.ACTION_DOWN) {
        if (mIsDragging) {
            return true;
        } else if (mIsUnableToDrag) {
            return false;
        }
    }

    switch (action) {
    case MotionEvent.ACTION_MOVE:

        final int activePointerId = mActivePointerId;
        if (activePointerId == INVALID_VALUE) {
            break;
        }
        final int pointerIndex = MotionEventCompat.findPointerIndex(ev, activePointerId);
        final float x = getViewX(ev);
        final float dx = x - mLastX;
        final float xDiff = Math.abs(dx);
        final float y = getViewY(ev);
        final float dy = y - mLastY;
        final float yDiff = Math.abs(dy);

        if ((dx != 0 || dy != 0) && canScroll(this, false, (int) dx, (int) dy, (int) x, (int) y)) {
            mLastX = mInitialRawX = x;
            mLastY = mInitialRawY = y;
            mInitialX = ev.getX(pointerIndex);
            mInitialY = ev.getY(pointerIndex);
            return false;
        }

        final boolean validHorizontalDrag = xDiff > mTouchSlop && xDiff > yDiff;
        final boolean validVerticalDrag = yDiff > mTouchSlop && yDiff > xDiff;

        if (validHorizontalDrag) {
            mLastX = x;
        } else if (validVerticalDrag) {
            mLastY = y;
        }

        if (validHorizontalDrag || validVerticalDrag) {
            mIsDragging = true;
            setDrawingCacheEnabled(true);
        }
        break;

    case MotionEvent.ACTION_DOWN:
        mLastX = mInitialRawX = getViewX(ev);
        mLastY = mInitialRawY = getViewY(ev);
        mInitialX = ev.getX(0);
        mInitialY = ev.getY(0);
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);

        if (touchPointIsWithinBounds(ev.getX(), ev.getY())) {
            mIsDragging = false;
            mIsUnableToDrag = false;
            // We don't want to do anything, send the event up
            return super.onInterceptTouchEvent(ev);
        } else {
            completeScroll();
            mIsDragging = false;
            mIsUnableToDrag = true;
        }
        break;
    case MotionEvent.ACTION_POINTER_UP:
        onSecondaryPointerUp(ev);
        break;
    }

    if (!mIsDragging) {
        if (mVelocityTracker == null) {
            mVelocityTracker = VelocityTracker.obtain();
        }
        mVelocityTracker.addMovement(ev);
    }

    return mIsDragging;
}

From source file:com.hynet.mergepay.components.widget.panellayout.ViewDragHelper.java

public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();//  www  . j a  v  a 2  s  . c  o  m
    }

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
            tryCaptureViewForDrag(toCapture, pointerId);
        }

        final int edgesTouched = mInitialEdgesTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);

        // A ViewDragHelper can only manipulate one view at a time.
        if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgesTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
        } else if (mDragState == STATE_SETTLING) {
            // Catch a settling view if possible.
            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture == mCapturedView) {
                tryCaptureViewForDrag(toCapture, pointerId);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        // First to cross a touch slop over a draggable view wins. Also report edge drags.
        final int pointerCount = MotionEventCompat.getPointerCount(ev);
        for (int i = 0; i < pointerCount && mInitialMotionX != null && mInitialMotionY != null; i++) {
            final int pointerId = MotionEventCompat.getPointerId(ev, i);
            if (pointerId >= mInitialMotionX.length || pointerId >= mInitialMotionY.length) {
                continue;
            }
            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[pointerId];
            final float dy = y - mInitialMotionY[pointerId];

            reportNewEdgeDrags(dx, dy, pointerId);
            if (mDragState == STATE_DRAGGING) {
                // Callback might have started an edge drag
                break;
            }

            final View toCapture = findTopChildUnder((int) mInitialMotionX[pointerId],
                    (int) mInitialMotionY[pointerId]);
            if (toCapture != null && checkTouchSlop(toCapture, dx, dy)
                    && tryCaptureViewForDrag(toCapture, pointerId)) {
                break;
            }
        }
        saveLastMotion(ev);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }
    }

    return mDragState == STATE_DRAGGING;
}

From source file:com.hb.hkm.slidinglayer.SlidLayer.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (!mEnabled || !mIsDragging && !mLastTouchAllowed && !allowSlidingFromHere(mInitialX, mInitialY)) {
        return false;
    }//from w ww  .  j av  a2s .  co  m

    final int action = ev.getAction();

    if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL
            || action == MotionEvent.ACTION_OUTSIDE) {
        mLastTouchAllowed = false;
    } else {
        mLastTouchAllowed = true;
    }

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    switch (action & MotionEventCompat.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN:
        completeScroll();

        // Remember where the motion event started
        mLastX = mInitialX = ev.getX();
        mLastY = mInitialY = ev.getY();
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        break;
    case MotionEvent.ACTION_MOVE:
        if (!mIsDragging) {
            final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
            if (pointerIndex == INVALID_VALUE) {
                mActivePointerId = INVALID_VALUE;
                break;
            }
            final float x = MotionEventCompat.getX(ev, pointerIndex);
            final float xDiff = Math.abs(x - mLastX);
            final float y = MotionEventCompat.getY(ev, pointerIndex);
            final float yDiff = Math.abs(y - mLastY);

            final boolean validHorizontalDrag = xDiff > mTouchSlop && xDiff > yDiff;
            final boolean validVerticalDrag = yDiff > mTouchSlop && yDiff > xDiff;

            if (validHorizontalDrag) {
                mLastX = x;
            } else if (validVerticalDrag) {
                mLastY = y;
            }

            if (validHorizontalDrag || validVerticalDrag) {
                mIsDragging = true;
                setDrawingCacheEnabled(true);
            }
        }
        if (mIsDragging) {
            // Scroll to follow the motion event
            final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
            if (activePointerIndex == INVALID_VALUE) {
                mActivePointerId = INVALID_VALUE;
                break;
            }
            final float x = MotionEventCompat.getX(ev, activePointerIndex);
            final float y = MotionEventCompat.getY(ev, activePointerIndex);
            final float deltaX = mLastX - x;
            final float deltaY = mLastY - y;
            mLastX = x;
            mLastY = y;
            final float oldScrollX = getScrollX();
            final float oldScrollY = getScrollY();
            float scrollX = oldScrollX + deltaX;
            float scrollY = oldScrollY + deltaY;

            // Log.d("Layer", String.format("Layer scrollX[%f],scrollY[%f]", scrollX, scrollY));
            final float leftBound, rightBound;
            final float bottomBound, topBound;
            switch (mScreenSide) {
            case STICK_TO_LEFT:
                topBound = bottomBound = rightBound = 0;
                leftBound = getWidth(); // How far left we can scroll
                break;
            case STICK_TO_RIGHT:
                rightBound = -getWidth();
                topBound = bottomBound = leftBound = 0;
                break;
            case STICK_TO_TOP:
                topBound = getHeight();
                bottomBound = rightBound = leftBound = 0;
                break;
            case STICK_TO_BOTTOM:
                topBound = rightBound = leftBound = 0;
                bottomBound = -getHeight();
                break;
            default:
                topBound = bottomBound = rightBound = leftBound = 0;
                break;
            }
            if (scrollX > leftBound) {
                scrollX = leftBound;
            } else if (scrollX < rightBound) {
                scrollX = rightBound;
            }
            if (scrollY > topBound) {
                scrollY = topBound;
            } else if (scrollY < bottomBound) {
                scrollY = bottomBound;
            }

            // Keep the precision
            mLastX += scrollX - (int) scrollX;
            mLastY += scrollY - (int) scrollY;
            scrollToAndNotify((int) scrollX, (int) scrollY);
        }
        break;
    case MotionEvent.ACTION_UP:

        if (mIsDragging) {
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            final int initialVelocityX = (int) VelocityTrackerCompat.getXVelocity(velocityTracker,
                    mActivePointerId);
            final int initialVelocityY = (int) VelocityTrackerCompat.getYVelocity(velocityTracker,
                    mActivePointerId);
            final int scrollX = getScrollX();
            final int scrollY = getScrollY();
            final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
            final float x = MotionEventCompat.getX(ev, activePointerIndex);
            final float y = MotionEventCompat.getY(ev, activePointerIndex);

            int nextState = determineNextStateForDrag(scrollX, scrollY, initialVelocityX, initialVelocityY,
                    (int) mInitialX, (int) mInitialY, (int) x, (int) y);
            setLayerState(nextState, true, true, initialVelocityX, initialVelocityY);

            mActivePointerId = INVALID_VALUE;
            endDrag();

        } else if (changeStateOnTap) {
            int nextState = determineNextStateAfterTap();
            setLayerState(nextState, true, true);
        }
        break;
    case MotionEvent.ACTION_CANCEL:
        if (mIsDragging) {
            setLayerState(mCurrentState, true, true);
            mActivePointerId = INVALID_VALUE;
            endDrag();
        }
        break;
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int index = MotionEventCompat.getActionIndex(ev);
        mLastX = MotionEventCompat.getX(ev, index);
        mLastY = MotionEventCompat.getY(ev, index);
        mActivePointerId = MotionEventCompat.getPointerId(ev, index);
        break;
    }
    case MotionEventCompat.ACTION_POINTER_UP:
        onSecondaryPointerUp(ev);
        mLastX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId));
        mLastY = MotionEventCompat.getY(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId));
        break;
    }
    if (mActivePointerId == INVALID_VALUE) {
        mLastTouchAllowed = false;
    }
    return true;
}

From source file:com.wunderlist.slidinglayer.SlidingLayer.java

@Override
public boolean onTouchEvent(MotionEvent ev) {

    if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) {
        return false;
    }//w  ww.  j  a v a  2 s.com

    if (!mEnabled || !mIsDragging && !touchPointIsWithinBounds(mInitialX, mInitialY)) {
        return false;
    }

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    final int action = ev.getAction();

    switch (action & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN: {
        completeScroll();

        // Remember where the motion event started
        mLastX = mInitialRawX = getViewX(ev);
        mLastY = mInitialRawY = getViewY(ev);
        mInitialX = ev.getX();
        mInitialY = ev.getY();
        mActivePointerId = ev.getPointerId(0);
        break;
    }

    case MotionEvent.ACTION_MOVE: {

        final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);

        if (!touchPointIsWithinBounds(ev.getX(), ev.getY(), false))
            return false;

        final float x = getViewX(ev);
        final float y = getViewY(ev);

        final float deltaX = mLastX - x;
        final float deltaY = mLastY - y;

        mLastX = x;
        mLastY = y;

        if (!mIsDragging) {

            final float xDiff = Math.abs(x - mInitialRawX);
            final float yDiff = Math.abs(y - mInitialRawY);

            final boolean validHorizontalDrag = xDiff > mTouchSlop && xDiff > yDiff;
            final boolean validVerticalDrag = yDiff > mTouchSlop && yDiff > xDiff;

            if (validHorizontalDrag || validVerticalDrag) {
                mIsDragging = true;
                setDrawingCacheEnabled(true);
            }
        }

        if (mIsDragging) {

            final float oldScrollX = getScrollX();
            final float oldScrollY = getScrollY();
            float scrollX = oldScrollX + deltaX;
            float scrollY = oldScrollY + deltaY;

            // Log.d("Layer", String.format("Layer scrollX[%f],scrollY[%f]", scrollX, scrollY));
            final float leftBound, rightBound;
            final float bottomBound, topBound;
            switch (mScreenSide) {
            case STICK_TO_LEFT:
                topBound = bottomBound = rightBound = 0;
                leftBound = getWidth(); // How far left we can scroll
                break;
            case STICK_TO_RIGHT:
                rightBound = -getWidth();
                topBound = bottomBound = leftBound = 0;
                break;
            case STICK_TO_TOP:
                topBound = getHeight();
                bottomBound = rightBound = leftBound = 0;
                break;
            case STICK_TO_BOTTOM:
                bottomBound = -getHeight();
                topBound = rightBound = leftBound = 0;
                break;
            default:
                topBound = bottomBound = rightBound = leftBound = 0;
                break;
            }

            if (scrollX > leftBound) {
                scrollX = leftBound;
            } else if (scrollX < rightBound) {
                scrollX = rightBound;
            }
            if (scrollY > topBound) {
                scrollY = topBound;
            } else if (scrollY < bottomBound) {
                scrollY = bottomBound;
            }

            // Keep the precision
            mLastX += scrollX - (int) scrollX;
            mLastY += scrollY - (int) scrollY;

            scrollToAndNotify((int) scrollX, (int) scrollY);
        }
        break;
    }

    case MotionEvent.ACTION_UP: {

        if (mIsDragging) {
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            final int initialVelocityX = (int) VelocityTrackerCompat.getXVelocity(velocityTracker,
                    mActivePointerId);
            final int initialVelocityY = (int) VelocityTrackerCompat.getYVelocity(velocityTracker,
                    mActivePointerId);
            final int scrollX = getScrollX();
            final int scrollY = getScrollY();

            final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
            final float x = getViewX(ev);
            final float y = getViewY(ev);

            int nextState = determineNextStateForDrag(scrollX, scrollY, initialVelocityX, initialVelocityY,
                    (int) mInitialRawX, (int) mInitialRawY, (int) x, (int) y);
            setLayerState(nextState, true, true, initialVelocityX, initialVelocityY);

            mActivePointerId = INVALID_VALUE;
            endDrag();

        } else if (changeStateOnTap) {
            int nextState = determineNextStateAfterTap();
            setLayerState(nextState, true, true);
        }
        break;
    }

    case MotionEvent.ACTION_CANCEL:
        if (mIsDragging) {
            setLayerState(mCurrentState, true, true);
            mActivePointerId = INVALID_VALUE;
            endDrag();
        }
        break;

    case MotionEvent.ACTION_POINTER_DOWN: {
        final int pointerIndex = MotionEventCompat.getActionIndex(ev);
        mActivePointerId = ev.getPointerId(pointerIndex);
        mLastX = getViewX(ev);
        mLastY = getViewY(ev);
        break;

    }
    case MotionEvent.ACTION_POINTER_UP: {
        onSecondaryPointerUp(ev);
        final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        mLastX = getViewX(ev);
        mLastY = getViewY(ev);
        break;
    }
    }

    return true;
}

From source file:io.amira.zen.layout.slider.ZenViewAbove.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {

    if (!mEnabled)
        return false;

    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;

    if (DEBUG)//from ww  w.  j a  v a2 s  .  co m
        if (action == MotionEvent.ACTION_DOWN)
            ZenApplication.log.v("Received ACTION_DOWN");

    if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP
            || (action != MotionEvent.ACTION_DOWN && mIsUnableToDrag)) {
        endDrag();
        return false;
    }

    switch (action) {
    case MotionEvent.ACTION_MOVE:
        determineDrag(ev);
        break;
    case MotionEvent.ACTION_DOWN:
        int index = MotionEventCompat.getActionIndex(ev);
        mActivePointerId = MotionEventCompat.getPointerId(ev, index);
        if (mActivePointerId == INVALID_POINTER)
            break;
        mLastMotionX = mInitialMotionX = MotionEventCompat.getX(ev, index);
        mLastMotionY = MotionEventCompat.getY(ev, index);
        if (thisTouchAllowed(ev)) {
            mIsBeingDragged = false;
            mIsUnableToDrag = false;
            if (isMenuOpen() && mViewBehind.menuTouchInQuickReturn(mContent, mCurItem, ev.getX() + mScrollX)) {
                mQuickReturn = true;
            }
        } else {
            mIsUnableToDrag = true;
        }
        break;
    case MotionEventCompat.ACTION_POINTER_UP:
        onSecondaryPointerUp(ev);
        break;
    }

    if (!mIsBeingDragged) {
        if (mVelocityTracker == null) {
            mVelocityTracker = VelocityTracker.obtain();
        }
        mVelocityTracker.addMovement(ev);
    }
    return mIsBeingDragged || mQuickReturn;
}

From source file:nf.framework.expand.widgets.staggerView.StaggeredGridView.java

/**  
 * @param event ?VelocityTrackerMotionEvent  
 *  //from   w ww .  j  a  v a2  s  .  co  m
 * @see android.view.VelocityTracker#obtain()  
 * @see android.view.VelocityTracker#addMovement(MotionEvent)  
 */
private void acquireVelocityTracker(final MotionEvent event) {
    if (null == mVelocityTracker) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(event);
}

From source file:com.bulletnoid.android.widget.StaggeredGridView.StaggeredGridView3.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (!isEnabled()) {
        // A disabled view that is clickable still consumes the touch
        // events, it just doesn't respond to them.
        return isClickable() || isLongClickable();
    }//from w  w w .  j  ava  2  s .  c  om

    final int action = ev.getAction();

    View v;
    int deltaY;

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    switch (action & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN: {
        mActivePointerId = ev.getPointerId(0);
        final int x = (int) ev.getX();
        final int y = (int) ev.getY();
        int motionPosition = pointToPosition(x, y);
        if (!mDataChanged) {
            if ((mTouchMode != TOUCH_MODE_FLINGING) && (motionPosition >= 0)
                    && (getAdapter().isEnabled(motionPosition))) {
                // User clicked on an actual view (and was not stopping a fling). It might be a
                // click or a scroll. Assume it is a click until proven otherwise
                mTouchMode = TOUCH_MODE_DOWN;
                // FIXME Debounce
                if (mPendingCheckForTap == null) {
                    mPendingCheckForTap = new CheckForTap();
                }
                postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
            } else {
                if (ev.getEdgeFlags() != 0 && motionPosition < 0) {
                    // If we couldn't find a view to click on, but the down event was touching
                    // the edge, we will bail out and try again. This allows the edge correcting
                    // code in ViewRoot to try to find a nearby view to select
                    return false;
                }

                if (mTouchMode == TOUCH_MODE_FLINGING) {
                    // Stopped a fling. It is a scroll.
                    //createScrollingCache();
                    mTouchMode = TOUCH_MODE_DRAGGING;
                    mMotionCorrection = 0;
                    motionPosition = findMotionRow(y);
                    reportScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
                }
            }
        }

        if (motionPosition >= 0) {
            // Remember where the motion event started
            v = getChildAt(motionPosition - mFirstPosition);
            //mMotionViewOriginalTop=v.getTop();
        }
        mLastTouchX = x;
        mLastTouchY = y;
        mMotionPosition = motionPosition;
        mTouchRemainderY = Integer.MIN_VALUE;
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        final int pointerIndex = ev.findPointerIndex(mActivePointerId);
        final int y = (int) ev.getY(pointerIndex);
        deltaY = (int) (y - mLastTouchY);
        switch (mTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            // Check if we have moved far enough that it looks more like a
            // scroll than a tap
            startScrollIfNeeded(deltaY);
            break;
        case TOUCH_MODE_DRAGGING:
            /*if (PROFILE_SCROLLING) {
                if (!mScrollProfilingStarted) {
                    Debug.startMethodTracing("AbsListViewScroll");
                    mScrollProfilingStarted=true;
                }
            }*/

            if (y != mTouchRemainderY) {
                deltaY -= mMotionCorrection;
                int incrementalDeltaY = mTouchRemainderY != Integer.MIN_VALUE ? (int) (y - mTouchRemainderY)
                        : deltaY;

                // No need to do all this work if we're not going to move anyway
                boolean atEdge = false;
                if (incrementalDeltaY != 0) {
                    atEdge = trackMotionScroll(deltaY, true);
                }

                // Check to see if we have bumped into the scroll limit
                if (atEdge && getChildCount() > 0) {
                    // Treat this like we're starting a new scroll from the current
                    // position. This will let the user start scrolling back into
                    // content immediately rather than needing to scroll back to the
                    // point where they hit the limit first.
                    int motionPosition = findMotionRow(y);
                    if (motionPosition >= 0) {
                        final View motionView = getChildAt(motionPosition - mFirstPosition);
                        //mMotionViewOriginalTop=motionView.getTop();
                    }
                    mLastTouchY = y;
                    mMotionPosition = motionPosition;
                    invalidate();
                }
                mTouchRemainderY = y;
            }
            break;
        }

        break;
    }

    case MotionEvent.ACTION_UP: {
        switch (mTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            final int motionPosition = mMotionPosition;
            final View child = getChildAt(motionPosition - mFirstPosition);
            System.out.println("child:" + child + " motionPosition:" + motionPosition);
            if (child != null && !child.hasFocusable()) {
                if (mTouchMode != TOUCH_MODE_DOWN) {
                    child.setPressed(false);
                }

                if (mPerformClick == null) {
                    mPerformClick = new PerformClick();
                }

                final PerformClick performClick = mPerformClick;
                //performClick.mChild=child;
                performClick.mClickMotionPosition = motionPosition;
                performClick.rememberWindowAttachCount();

                //mResurrectToPosition=motionPosition;

                if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
                    //mLayoutMode=LAYOUT_NORMAL;
                    if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                        mTouchMode = TOUCH_MODE_TAP;
                        layoutChildren(mDataChanged);
                        child.setPressed(true);
                        positionSelector(mMotionPosition, child);
                        setPressed(true);
                        if (mSelector != null) {
                            Drawable d = mSelector.getCurrent();
                            if (d != null && d instanceof TransitionDrawable) {
                                ((TransitionDrawable) d).resetTransition();
                            }
                        }
                        postDelayed(new Runnable() {
                            public void run() {
                                child.setPressed(false);
                                setPressed(false);
                                if (!mDataChanged) {
                                    post(performClick);
                                }
                                mTouchMode = TOUCH_MODE_REST;
                            }
                        }, ViewConfiguration.getPressedStateDuration());
                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                    }
                    return true;
                } else if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                    post(performClick);
                }
            }
            mTouchMode = TOUCH_MODE_REST;
            break;
        case TOUCH_MODE_DRAGGING:
            final int childCount = getChildCount();
            if (childCount > 0) {
                /*int top=getFillChildTop();
                int bottom=getFillChildBottom();
                if (mFirstPosition==0&&top>=mListPadding.top&&
                    mFirstPosition+childCount<mItemCount&&
                    bottom<=getHeight()-getPaddingBottom()mListPadding.bottom) {
                    mTouchMode=TOUCH_MODE_REST;
                    reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                } else*/ {
                    final VelocityTracker velocityTracker = mVelocityTracker;
                    velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
                    final int initialVelocity = (int) velocityTracker.getYVelocity(mActivePointerId);

                    if (Math.abs(initialVelocity) > mMinimumVelocity) {
                        if (mFlingRunnable == null) {
                            mFlingRunnable = new FlingRunnable();
                        }
                        reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);

                        mFlingRunnable.start(-initialVelocity);
                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                        reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                    }
                }
            } else {
                mTouchMode = TOUCH_MODE_REST;
                reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
            }
            break;
        }

        setPressed(false);

        // Need to redraw since we probably aren't drawing the selector anymore
        invalidate();

        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }

        mActivePointerId = INVALID_POINTER;

        /*if (PROFILE_SCROLLING) {
            if (mScrollProfilingStarted) {
                Debug.stopMethodTracing();
                mScrollProfilingStarted=false;
            }
        }*/
        break;
    }

    case MotionEvent.ACTION_CANCEL: {
        mTouchMode = TOUCH_MODE_REST;
        setPressed(false);
        View motionView = this.getChildAt(mMotionPosition - mFirstPosition);
        if (motionView != null) {
            motionView.setPressed(false);
        }
        clearScrollingCache();

        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }

        mActivePointerId = INVALID_POINTER;
        break;
    }

    case MotionEvent.ACTION_POINTER_UP: {
        onSecondaryPointerUp(ev);
        final int x = (int) mLastTouchX;
        final int y = (int) mLastTouchY;
        final int motionPosition = pointToPosition(x, y);
        if (motionPosition >= 0) {
            // Remember where the motion event started
            v = getChildAt(motionPosition - mFirstPosition);
            //mMotionViewOriginalTop=v.getTop();
            mMotionPosition = motionPosition;
        }
        mTouchRemainderY = y;
        break;
    }
    }

    return true;
}