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

Example 56 with VelocityTracker

use of android.view.VelocityTracker in project android_frameworks_base by crdroidandroid.

the class AbsListView method onTouchUp.

private void onTouchUp(MotionEvent ev) {
    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);
            if (child != null) {
                if (mTouchMode != TOUCH_MODE_DOWN) {
                    child.setPressed(false);
                }
                final float x = ev.getX();
                final boolean inList = x > mListPadding.left && x < getWidth() - mListPadding.right;
                if (inList && !child.hasFocusable()) {
                    if (mPerformClick == null) {
                        mPerformClick = new PerformClick();
                    }
                    final AbsListView.PerformClick performClick = mPerformClick;
                    performClick.mClickMotionPosition = motionPosition;
                    performClick.rememberWindowAttachCount();
                    mResurrectToPosition = motionPosition;
                    if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
                        removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ? mPendingCheckForTap : mPendingCheckForLongPress);
                        mLayoutMode = LAYOUT_NORMAL;
                        if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                            mTouchMode = TOUCH_MODE_TAP;
                            setSelectedPositionInt(mMotionPosition);
                            layoutChildren();
                            child.setPressed(true);
                            positionSelector(mMotionPosition, child);
                            setPressed(true);
                            if (mSelector != null) {
                                Drawable d = mSelector.getCurrent();
                                if (d != null && d instanceof TransitionDrawable) {
                                    ((TransitionDrawable) d).resetTransition();
                                }
                                mSelector.setHotspot(x, ev.getY());
                            }
                            if (mTouchModeReset != null) {
                                removeCallbacks(mTouchModeReset);
                            }
                            mTouchModeReset = new Runnable() {

                                @Override
                                public void run() {
                                    mTouchModeReset = null;
                                    mTouchMode = TOUCH_MODE_REST;
                                    child.setPressed(false);
                                    setPressed(false);
                                    if (!mDataChanged && !mIsDetaching && isAttachedToWindow()) {
                                        performClick.run();
                                    }
                                }
                            };
                            postDelayed(mTouchModeReset, ViewConfiguration.getPressedStateDuration());
                        } else {
                            mTouchMode = TOUCH_MODE_REST;
                            updateSelectorState();
                        }
                        return;
                    } else if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                        performClick.run();
                    }
                }
            }
            mTouchMode = TOUCH_MODE_REST;
            updateSelectorState();
            break;
        case TOUCH_MODE_SCROLL:
            final int childCount = getChildCount();
            if (childCount > 0) {
                final int firstChildTop = getChildAt(0).getTop();
                final int lastChildBottom = getChildAt(childCount - 1).getBottom();
                final int contentTop = mListPadding.top;
                final int contentBottom = getHeight() - mListPadding.bottom;
                if (mFirstPosition == 0 && firstChildTop >= contentTop && mFirstPosition + childCount < mItemCount && lastChildBottom <= getHeight() - contentBottom) {
                    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) * mVelocityScale);
                    // Fling if we have enough velocity and we aren't at a boundary.
                    // Since we can potentially overfling more than we can overscroll, don't
                    // allow the weird behavior where you can scroll to a boundary then
                    // fling further.
                    boolean flingVelocity = Math.abs(initialVelocity) > mMinimumVelocity;
                    if (flingVelocity && !((mFirstPosition == 0 && firstChildTop == contentTop - mOverscrollDistance) || (mFirstPosition + childCount == mItemCount && lastChildBottom == contentBottom + mOverscrollDistance))) {
                        if (!dispatchNestedPreFling(0, -initialVelocity)) {
                            if (mFlingRunnable == null) {
                                mFlingRunnable = new FlingRunnable();
                            }
                            reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);
                            mFlingRunnable.start(-initialVelocity);
                            dispatchNestedFling(0, -initialVelocity, true);
                        } else {
                            mTouchMode = TOUCH_MODE_REST;
                            reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                        }
                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                        reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                        if (mFlingRunnable != null) {
                            mFlingRunnable.endFling();
                        }
                        if (mPositionScroller != null) {
                            mPositionScroller.stop();
                        }
                        if (flingVelocity && !dispatchNestedPreFling(0, -initialVelocity)) {
                            dispatchNestedFling(0, -initialVelocity, false);
                        }
                    }
                }
            } else {
                mTouchMode = TOUCH_MODE_REST;
                reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
            }
            break;
        case TOUCH_MODE_OVERSCROLL:
            if (mFlingRunnable == null) {
                mFlingRunnable = new FlingRunnable();
            }
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            final int initialVelocity = (int) velocityTracker.getYVelocity(mActivePointerId);
            reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);
            if (Math.abs(initialVelocity) > mMinimumVelocity) {
                mFlingRunnable.startOverfling(-initialVelocity);
            } else {
                mFlingRunnable.startSpringback();
            }
            break;
    }
    setPressed(false);
    if (mEdgeGlowTop != null) {
        mEdgeGlowTop.onRelease();
        mEdgeGlowBottom.onRelease();
    }
    // Need to redraw since we probably aren't drawing the selector anymore
    invalidate();
    removeCallbacks(mPendingCheckForLongPress);
    recycleVelocityTracker();
    mActivePointerId = INVALID_POINTER;
    if (PROFILE_SCROLLING) {
        if (mScrollProfilingStarted) {
            Debug.stopMethodTracing();
            mScrollProfilingStarted = false;
        }
    }
    if (mScrollStrictSpan != null) {
        mScrollStrictSpan.finish();
        mScrollStrictSpan = null;
    }
}

Example 57 with VelocityTracker

use of android.view.VelocityTracker in project android_frameworks_base by crdroidandroid.

the class RotarySelector method onTouchEvent.

/**
     * Handle touch screen events.
     *
     * @param event The motion event.
     * @return True if the event was handled, false otherwise.
     */
@Override
public boolean onTouchEvent(MotionEvent event) {
    if (mAnimating) {
        return true;
    }
    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(event);
    final int height = getHeight();
    final int eventX = isHoriz() ? (int) event.getX() : height - ((int) event.getY());
    final int hitWindow = mDimpleWidth;
    final int action = event.getAction();
    switch(action) {
        case MotionEvent.ACTION_DOWN:
            if (DBG)
                log("touch-down");
            mTriggered = false;
            if (mGrabbedState != NOTHING_GRABBED) {
                reset();
                invalidate();
            }
            if (eventX < mLeftHandleX + hitWindow) {
                mRotaryOffsetX = eventX - mLeftHandleX;
                setGrabbedState(LEFT_HANDLE_GRABBED);
                invalidate();
                vibrate(VIBRATE_SHORT);
            } else if (eventX > mRightHandleX - hitWindow) {
                mRotaryOffsetX = eventX - mRightHandleX;
                setGrabbedState(RIGHT_HANDLE_GRABBED);
                invalidate();
                vibrate(VIBRATE_SHORT);
            }
            break;
        case MotionEvent.ACTION_MOVE:
            if (DBG)
                log("touch-move");
            if (mGrabbedState == LEFT_HANDLE_GRABBED) {
                mRotaryOffsetX = eventX - mLeftHandleX;
                invalidate();
                final int rightThresh = isHoriz() ? getRight() : height;
                if (eventX >= rightThresh - mEdgeTriggerThresh && !mTriggered) {
                    mTriggered = true;
                    dispatchTriggerEvent(OnDialTriggerListener.LEFT_HANDLE);
                    final VelocityTracker velocityTracker = mVelocityTracker;
                    velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
                    final int rawVelocity = isHoriz() ? (int) velocityTracker.getXVelocity() : -(int) velocityTracker.getYVelocity();
                    final int velocity = Math.max(mMinimumVelocity, rawVelocity);
                    mDimplesOfFling = Math.max(8, Math.abs(velocity / mDimpleSpacing));
                    startAnimationWithVelocity(eventX - mLeftHandleX, mDimplesOfFling * mDimpleSpacing, velocity);
                }
            } else if (mGrabbedState == RIGHT_HANDLE_GRABBED) {
                mRotaryOffsetX = eventX - mRightHandleX;
                invalidate();
                if (eventX <= mEdgeTriggerThresh && !mTriggered) {
                    mTriggered = true;
                    dispatchTriggerEvent(OnDialTriggerListener.RIGHT_HANDLE);
                    final VelocityTracker velocityTracker = mVelocityTracker;
                    velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
                    final int rawVelocity = isHoriz() ? (int) velocityTracker.getXVelocity() : -(int) velocityTracker.getYVelocity();
                    final int velocity = Math.min(-mMinimumVelocity, rawVelocity);
                    mDimplesOfFling = Math.max(8, Math.abs(velocity / mDimpleSpacing));
                    startAnimationWithVelocity(eventX - mRightHandleX, -(mDimplesOfFling * mDimpleSpacing), velocity);
                }
            }
            break;
        case MotionEvent.ACTION_UP:
            if (DBG)
                log("touch-up");
            // handle animating back to start if they didn't trigger
            if (mGrabbedState == LEFT_HANDLE_GRABBED && Math.abs(eventX - mLeftHandleX) > 5) {
                // set up "snap back" animation
                startAnimation(eventX - mLeftHandleX, 0, SNAP_BACK_ANIMATION_DURATION_MILLIS);
            } else if (mGrabbedState == RIGHT_HANDLE_GRABBED && Math.abs(eventX - mRightHandleX) > 5) {
                // set up "snap back" animation
                startAnimation(eventX - mRightHandleX, 0, SNAP_BACK_ANIMATION_DURATION_MILLIS);
            }
            mRotaryOffsetX = 0;
            setGrabbedState(NOTHING_GRABBED);
            invalidate();
            if (mVelocityTracker != null) {
                // wishin' we had generational GC
                mVelocityTracker.recycle();
                mVelocityTracker = null;
            }
            break;
        case MotionEvent.ACTION_CANCEL:
            if (DBG)
                log("touch-cancel");
            reset();
            invalidate();
            if (mVelocityTracker != null) {
                mVelocityTracker.recycle();
                mVelocityTracker = null;
            }
            break;
    }
    return true;
}

Example 58 with VelocityTracker

use of android.view.VelocityTracker in project smartmodule by carozhu.

the class LazyViewpager method endFakeDrag.

/**
     * End a fake drag of the pager.
     *
     * @see #beginFakeDrag()
     * @see #fakeDragBy(float)
     */
public void endFakeDrag() {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    }
    final VelocityTracker velocityTracker = mVelocityTracker;
    velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
    int initialVelocity = (int) VelocityTrackerCompat.getYVelocity(velocityTracker, mActivePointerId);
    mPopulatePending = true;
    if ((Math.abs(initialVelocity) > mMinimumVelocity) || Math.abs(mInitialMotionX - mLastMotionX) >= (getWidth() / 3)) {
        if (mLastMotionX > mInitialMotionX) {
            setCurrentItemInternal(mCurItem - 1, true, true);
        } else {
            setCurrentItemInternal(mCurItem + 1, true, true);
        }
    } else {
        setCurrentItemInternal(mCurItem, true, true);
    }
    endDrag();
    mFakeDragging = false;
}

Example 59 with VelocityTracker

use of android.view.VelocityTracker in project smartmodule by carozhu.

the class LazyViewpager method onTouchEvent.

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (mFakeDragging) {
        // (It is likely that the user is multi-touching the screen.)
        return true;
    }
    if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) {
        // descendants.
        return false;
    }
    if (mAdapter == null || mAdapter.getCount() == 0) {
        // Nothing to present or scroll; nothing to touch.
        return false;
    }
    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);
    final int action = ev.getAction();
    boolean needsInvalidate = false;
    switch(action & MotionEventCompat.ACTION_MASK) {
        case MotionEvent.ACTION_DOWN:
            {
                /*
                 * If being flinged and user touches, stop the fling. isFinished
                 * will be false if being flinged.
                 */
                completeScroll();
                // Remember where the motion event started
                mLastMotionX = mInitialMotionX = ev.getX();
                mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
                break;
            }
        case MotionEvent.ACTION_MOVE:
            if (!mIsBeingDragged) {
                final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
                final float x = MotionEventCompat.getX(ev, pointerIndex);
                final float xDiff = Math.abs(x - mLastMotionX);
                final float y = MotionEventCompat.getY(ev, pointerIndex);
                final float yDiff = Math.abs(y - mLastMotionY);
                if (DEBUG)
                    Log.v(TAG, "Moved x to " + x + "," + y + " diff=" + xDiff + "," + yDiff);
                if (xDiff > mTouchSlop && xDiff > yDiff) {
                    if (DEBUG)
                        Log.v(TAG, "Starting drag!");
                    mIsBeingDragged = true;
                    mLastMotionX = x;
                    setScrollState(SCROLL_STATE_DRAGGING);
                    setScrollingCacheEnabled(true);
                }
            }
            if (mIsBeingDragged) {
                // Scroll to follow the motion event
                final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
                final float x = MotionEventCompat.getX(ev, activePointerIndex);
                final float deltaX = mLastMotionX - x;
                mLastMotionX = x;
                float oldScrollX = getScrollX();
                float scrollX = oldScrollX + deltaX;
                final int width = getWidth();
                final int widthWithMargin = width + mPageMargin;
                final int lastItemIndex = mAdapter.getCount() - 1;
                final float leftBound = Math.max(0, (mCurItem - 1) * widthWithMargin);
                final float rightBound = Math.min(mCurItem + 1, lastItemIndex) * widthWithMargin;
                if (scrollX < leftBound) {
                    if (leftBound == 0) {
                        float over = -scrollX;
                        needsInvalidate = mLeftEdge.onPull(over / width);
                    }
                    scrollX = leftBound;
                } else if (scrollX > rightBound) {
                    if (rightBound == lastItemIndex * widthWithMargin) {
                        float over = scrollX - rightBound;
                        needsInvalidate = mRightEdge.onPull(over / width);
                    }
                    scrollX = rightBound;
                }
                // Don't lose the rounded component
                mLastMotionX += scrollX - (int) scrollX;
                scrollTo((int) scrollX, getScrollY());
                if (mOnPageChangeListener != null) {
                    final int position = (int) scrollX / widthWithMargin;
                    final int positionOffsetPixels = (int) scrollX % widthWithMargin;
                    final float positionOffset = (float) positionOffsetPixels / widthWithMargin;
                    mOnPageChangeListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
                }
            }
            break;
        case MotionEvent.ACTION_UP:
            if (mIsBeingDragged) {
                final VelocityTracker velocityTracker = mVelocityTracker;
                velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
                int initialVelocity = (int) VelocityTrackerCompat.getXVelocity(velocityTracker, mActivePointerId);
                mPopulatePending = true;
                final int widthWithMargin = getWidth() + mPageMargin;
                final int scrollX = getScrollX();
                final int currentPage = scrollX / widthWithMargin;
                int nextPage = initialVelocity > 0 ? currentPage : currentPage + 1;
                setCurrentItemInternal(nextPage, true, true, initialVelocity);
                mActivePointerId = INVALID_POINTER;
                endDrag();
                needsInvalidate = mLeftEdge.onRelease() | mRightEdge.onRelease();
            }
            break;
        case MotionEvent.ACTION_CANCEL:
            if (mIsBeingDragged) {
                setCurrentItemInternal(mCurItem, true, true);
                mActivePointerId = INVALID_POINTER;
                endDrag();
                needsInvalidate = mLeftEdge.onRelease() | mRightEdge.onRelease();
            }
            break;
        case MotionEventCompat.ACTION_POINTER_DOWN:
            {
                final int index = MotionEventCompat.getActionIndex(ev);
                final float x = MotionEventCompat.getX(ev, index);
                mLastMotionX = x;
                mActivePointerId = MotionEventCompat.getPointerId(ev, index);
                break;
            }
        case MotionEventCompat.ACTION_POINTER_UP:
            onSecondaryPointerUp(ev);
            mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId));
            break;
    }
    if (needsInvalidate) {
        invalidate();
    }
    return true;
}

Example 60 with VelocityTracker

use of android.view.VelocityTracker in project android_frameworks_base by crdroidandroid.

the class ScrollView method onTouchEvent.

@Override
public boolean onTouchEvent(MotionEvent ev) {
    initVelocityTrackerIfNotExists();
    MotionEvent vtev = MotionEvent.obtain(ev);
    final int actionMasked = ev.getActionMasked();
    if (actionMasked == MotionEvent.ACTION_DOWN) {
        mNestedYOffset = 0;
    }
    vtev.offsetLocation(0, mNestedYOffset);
    switch(actionMasked) {
        case MotionEvent.ACTION_DOWN:
            {
                if (getChildCount() == 0) {
                    return false;
                }
                if ((mIsBeingDragged = !mScroller.isFinished())) {
                    final ViewParent parent = getParent();
                    if (parent != null) {
                        parent.requestDisallowInterceptTouchEvent(true);
                    }
                }
                /*
                 * If being flinged and user touches, stop the fling. isFinished
                 * will be false if being flinged.
                 */
                if (!mScroller.isFinished()) {
                    mScroller.abortAnimation();
                    if (mFlingStrictSpan != null) {
                        mFlingStrictSpan.finish();
                        mFlingStrictSpan = null;
                    }
                }
                // Remember where the motion event started
                mLastMotionY = (int) ev.getY();
                mActivePointerId = ev.getPointerId(0);
                startNestedScroll(SCROLL_AXIS_VERTICAL);
                break;
            }
        case MotionEvent.ACTION_MOVE:
            final int activePointerIndex = ev.findPointerIndex(mActivePointerId);
            if (activePointerIndex == -1) {
                Log.e(TAG, "Invalid pointerId=" + mActivePointerId + " in onTouchEvent");
                break;
            }
            final int y = (int) ev.getY(activePointerIndex);
            int deltaY = mLastMotionY - y;
            if (dispatchNestedPreScroll(0, deltaY, mScrollConsumed, mScrollOffset)) {
                deltaY -= mScrollConsumed[1];
                vtev.offsetLocation(0, mScrollOffset[1]);
                mNestedYOffset += mScrollOffset[1];
            }
            if (!mIsBeingDragged && Math.abs(deltaY) > mTouchSlop) {
                final ViewParent parent = getParent();
                if (parent != null) {
                    parent.requestDisallowInterceptTouchEvent(true);
                }
                mIsBeingDragged = true;
                if (deltaY > 0) {
                    deltaY -= mTouchSlop;
                } else {
                    deltaY += mTouchSlop;
                }
            }
            if (mIsBeingDragged) {
                // Scroll to follow the motion event
                mLastMotionY = y - mScrollOffset[1];
                final int oldY = mScrollY;
                final int range = getScrollRange();
                final int overscrollMode = getOverScrollMode();
                boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0);
                // calls onScrollChanged if applicable.
                if (overScrollBy(0, deltaY, 0, mScrollY, 0, range, 0, mOverscrollDistance, true) && !hasNestedScrollingParent()) {
                    // Break our velocity if we hit a scroll barrier.
                    mVelocityTracker.clear();
                }
                final int scrolledDeltaY = mScrollY - oldY;
                final int unconsumedY = deltaY - scrolledDeltaY;
                if (dispatchNestedScroll(0, scrolledDeltaY, 0, unconsumedY, mScrollOffset)) {
                    mLastMotionY -= mScrollOffset[1];
                    vtev.offsetLocation(0, mScrollOffset[1]);
                    mNestedYOffset += mScrollOffset[1];
                } else if (canOverscroll) {
                    final int pulledToY = oldY + deltaY;
                    if (pulledToY < 0) {
                        mEdgeGlowTop.onPull((float) deltaY / getHeight(), ev.getX(activePointerIndex) / getWidth());
                        if (!mEdgeGlowBottom.isFinished()) {
                            mEdgeGlowBottom.onRelease();
                        }
                    } else if (pulledToY > range) {
                        mEdgeGlowBottom.onPull((float) deltaY / getHeight(), 1.f - ev.getX(activePointerIndex) / getWidth());
                        if (!mEdgeGlowTop.isFinished()) {
                            mEdgeGlowTop.onRelease();
                        }
                    }
                    if (mEdgeGlowTop != null && (!mEdgeGlowTop.isFinished() || !mEdgeGlowBottom.isFinished())) {
                        postInvalidateOnAnimation();
                    }
                }
            }
            break;
        case MotionEvent.ACTION_UP:
            if (mIsBeingDragged) {
                final VelocityTracker velocityTracker = mVelocityTracker;
                velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
                int initialVelocity = (int) velocityTracker.getYVelocity(mActivePointerId);
                if ((Math.abs(initialVelocity) > mMinimumVelocity)) {
                    flingWithNestedDispatch(-initialVelocity);
                } else if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange())) {
                    postInvalidateOnAnimation();
                }
                mActivePointerId = INVALID_POINTER;
                endDrag();
            }
            break;
        case MotionEvent.ACTION_CANCEL:
            if (mIsBeingDragged && getChildCount() > 0) {
                if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange())) {
                    postInvalidateOnAnimation();
                }
                mActivePointerId = INVALID_POINTER;
                endDrag();
            }
            break;
        case MotionEvent.ACTION_POINTER_DOWN:
            {
                final int index = ev.getActionIndex();
                mLastMotionY = (int) ev.getY(index);
                mActivePointerId = ev.getPointerId(index);
                break;
            }
        case MotionEvent.ACTION_POINTER_UP:
            onSecondaryPointerUp(ev);
            mLastMotionY = (int) ev.getY(ev.findPointerIndex(mActivePointerId));
            break;
    }
    if (mVelocityTracker != null) {
        mVelocityTracker.addMovement(vtev);
    }
    vtev.recycle();
    return true;
}