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

Example 36 with VelocityTracker

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

the class VelocityTest method testDragLinearVertical.

@MediumTest
public void testDragLinearVertical() {
    long t = System.currentTimeMillis();
    VelocityTracker vt = VelocityTracker.obtain();
    // 100px in 400ms => 250px/s
    drag(vt, 200, 200, 100, 200, 15, t, 400);
    vt.computeCurrentVelocity(1000);
    assertEquals(0.0f, vt.getXVelocity());
    assertEqualFuzzy(250.0f, vt.getYVelocity(), 4f);
    vt.recycle();
}

Example 37 with VelocityTracker

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

the class VelocityTest method testDragAcceleration.

@MediumTest
public void testDragAcceleration() {
    long t = System.currentTimeMillis();
    VelocityTracker vt = VelocityTracker.obtain();
    drag(vt, 100, 200, 100, 200, 15, t, 400, new AccelerateInterpolator());
    vt.computeCurrentVelocity(1000);
    assertGreater(250.0f, vt.getXVelocity());
    assertGreater(250.0f, vt.getYVelocity());
    vt.recycle();
}

Example 38 with VelocityTracker

use of android.view.VelocityTracker in project android-support-v4-googlemaps by petedoyle.

the class ViewPager 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.getXVelocity(velocityTracker, mActivePointerId);
    mPopulatePending = true;
    final int width = getWidth();
    final int scrollX = getScrollX();
    final ItemInfo ii = infoForCurrentScrollPosition();
    final int currentPage = ii.position;
    final float pageOffset = (((float) scrollX / width) - ii.offset) / ii.widthFactor;
    final int totalDelta = (int) (mLastMotionX - mInitialMotionX);
    int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta);
    setCurrentItemInternal(nextPage, true, true, initialVelocity);
    endDrag();
    mFakeDragging = false;
}

Example 39 with VelocityTracker

use of android.view.VelocityTracker in project QLibrary by DragonsQC.

the class QLazyViewPager 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 40 with VelocityTracker

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

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;
    }
}