List of usage examples for android.view VelocityTracker obtain
static public VelocityTracker obtain()
From source file:com.chenglong.muscle.ui.LazyViewPager.java
@Override public boolean onTouchEvent(MotionEvent ev) { if (mFakeDragging) { // A fake drag is in progress already, ignore this real one // but still eat the touch events. // (It is likely that the user is multi-touching the screen.) return true; }/*from ww w. ja v a 2s . c o m*/ if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { // Don't handle edge touches immediately -- they may actually belong // to one of our // 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()); pageScrolled((int) scrollX); } 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; final float pageOffset = (float) (scrollX % widthWithMargin) / widthWithMargin; final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final int totalDelta = (int) (x - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); 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; }
From source file:com.tylz.jiaoyanglogistics.view.LazyViewPager.java
@Override public boolean onTouchEvent(MotionEvent ev) { if (mFakeDragging) { // A fake drag is in progress already, ignore this real one // but still eat the touch events. // (It is likely that the user is multi-touching the screen.) return true; }//from w w w .j av a2 s .com if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { // Don't handle edge touches immediately -- they may actually belong to one of our // 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()); pageScrolled((int) scrollX); } 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; final float pageOffset = (float) (scrollX % widthWithMargin) / widthWithMargin; final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final int totalDelta = (int) (x - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); 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; }
From source file:com.ferg.awfulapp.widget.AwfulViewPager.java
@Override public boolean onTouchEvent(MotionEvent ev) { if (mFakeDragging) { // A fake drag is in progress already, ignore this real one // but still eat the touch events. // (It is likely that the user is multi-touching the screen.) return true; }/*from w w w .j ava2 s . c om*/ if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { // Don't handle edge touches immediately -- they may actually belong to one of our // 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); //Log.v(TAG, "LATE Moved x to " + x + "," + y + " diff=" + xDiff + "," + yDiff); if (xDiff > mTouchSlop && xDiff > yDiff) { //Log.v(TAG, "LATE 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()); pageScrolled((int) scrollX); } 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; final float pageOffset = (float) (scrollX % widthWithMargin) / widthWithMargin; final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final int totalDelta = (int) (x - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); 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; }
From source file:beichen.douban.ui.view.LazyViewPager.java
@Override public boolean onTouchEvent(MotionEvent ev) { if (mFakeDragging) { // A fake drag is in progress already, ignore this real one // but still eat the touch events. // (It is likely that the user is multi-touching the screen.) return true; }/*from w w w .jav a 2s. co m*/ if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { // Don't handle edge touches immediately -- they may actually belong // to one of our // 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()); pageScrolled((int) scrollX); } 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; final float pageOffset = (float) (scrollX % widthWithMargin) / widthWithMargin; final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final int totalDelta = (int) (x - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); 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; }
From source file:org.immopoly.android.widget.ViewPager.java
@Override public boolean onTouchEvent(MotionEvent ev) { if (mFakeDragging) { // A fake drag is in progress already, ignore this real one // but still eat the touch events. // (It is likely that the user is multi-touching the screen.) return true; }//from ww w . jav a 2 s .c om if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { // Don't handle edge touches immediately -- they may actually belong to one of our // 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 = forcedChildWidth > 0 ? forcedChildWidth : getWidth(); final int widthWithMargin = width + mPageMargin; final int lastItemIndex = mAdapter.getCount() - 1; final float leftBound = Math.max(0, (mCurItem - 1) * widthWithMargin); float rightBound = Math.min(mCurItem + 1, lastItemIndex) * widthWithMargin; if (forcedChildWidth > 0) rightBound -= getWidth() - forcedChildWidth; if (scrollX < leftBound) { if (leftBound == 0) { float over = -scrollX; needsInvalidate = mLeftEdge.onPull(over / width); } scrollX = leftBound; } else if (scrollX > rightBound) { if (mCurItem + 1 >= lastItemIndex) { 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()); pageScrolled((int) scrollX); } 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 = (forcedChildWidth > 0 ? forcedChildWidth : getWidth()) + mPageMargin; final int scrollX = getScrollX(); final int currentPage = scrollX / widthWithMargin; final float pageOffset = (float) (scrollX % widthWithMargin) / widthWithMargin; final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final int totalDelta = (int) (x - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); 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; }
From source file:javalibrary.android.ui.VerticalViewPager.java
@Override public boolean onInterceptTouchEvent(MotionEvent ev) { /*//from w w w . j a v a 2 s.co m * This method JUST determines whether we want to intercept the motion. * If we return true, onMotionEvent will be called and we do the actual * scrolling there. */ final int action = ev.getAction() & MotionEventCompat.ACTION_MASK; // Always take care of the touch gesture being complete. if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) { // Release the drag. if (DEBUG) Log.v(TAG, "Intercept done!"); mIsBeingDragged = false; mIsUnableToDrag = false; mActivePointerId = INVALID_POINTER; if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } return false; } // Nothing more to do here if we have decided whether or not we // are dragging. if (action != MotionEvent.ACTION_DOWN) { if (mIsBeingDragged) { if (DEBUG) Log.v(TAG, "Intercept returning true!"); return true; } if (mIsUnableToDrag) { if (DEBUG) Log.v(TAG, "Intercept returning false!"); return false; } } switch (action) { case MotionEvent.ACTION_MOVE: { /* * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check * whether the user has moved far enough from his original down touch. */ /* * Locally do absolute value. mLastMotionY is set to the y value * of the down event. */ final int activePointerId = mActivePointerId; if (activePointerId == INVALID_POINTER) { // If we don't have a valid id, the touch down wasn't on content. break; } final int pointerIndex = MotionEventCompat.findPointerIndex(ev, activePointerId); final float x = MotionEventCompat.getX(ev, pointerIndex); final float dx = x - mLastMotionX; final float xDiff = Math.abs(dx); final float y = MotionEventCompat.getY(ev, pointerIndex); final float dy = y - mLastMotionY; final float yDiff = Math.abs(y - mLastMotionY); if (DEBUG) Log.v(TAG, "Moved x to " + x + "," + y + " diff=" + xDiff + "," + yDiff); // if (canScroll(this, false, (int) dx, (int) x, (int) y)) { if (canScrolls(this, false, (int) dy, (int) x, (int) y)) { // Nested view has scrollable area under this point. Let it be handled there. mInitialMotionX = mLastMotionX = x; mInitialMotionY = mLastMotionY = y; return false; } /*if (xDiff > mTouchSlop && xDiff > yDiff) { if (DEBUG) Log.v(TAG, "Starting drag!"); mIsBeingDragged = true; setScrollState(SCROLL_STATE_DRAGGING); mLastMotionX = x; setScrollingCacheEnabled(true); } else { if (yDiff > mTouchSlop) { // The finger has moved enough in the vertical // direction to be counted as a drag... abort // any attempt to drag horizontally, to work correctly // with children that have scrolling containers. if (DEBUG) Log.v(TAG, "Starting unable to drag!"); mIsUnableToDrag = true; } }*/ if (yDiff > mTouchSlop && yDiff > xDiff) { if (DEBUG) Log.v(TAG, "Starting drag!"); mIsBeingDragged = true; setScrollState(SCROLL_STATE_DRAGGING); mLastMotionX = x; mLastMotionY = y; setScrollingCacheEnabled(true); } else { if (xDiff > mTouchSlop) { // The finger has moved enough in the vertical // direction to be counted as a drag... abort // any attempt to drag horizontally, to work correctly // with children that have scrolling containers. if (DEBUG) Log.v(TAG, "Starting unable to drag!"); mIsUnableToDrag = true; } } break; } case MotionEvent.ACTION_DOWN: { /* * Remember location of down touch. * ACTION_DOWN always refers to pointer index 0. */ mLastMotionX = mInitialMotionX = ev.getX(); mLastMotionY = mInitialMotionY = ev.getY(); mActivePointerId = MotionEventCompat.getPointerId(ev, 0); if (mScrollState == SCROLL_STATE_SETTLING) { // Let the user 'catch' the pager as it animates. mIsBeingDragged = true; mIsUnableToDrag = false; setScrollState(SCROLL_STATE_DRAGGING); } else { completeScroll(); mIsBeingDragged = false; mIsUnableToDrag = false; } if (DEBUG) Log.v(TAG, "Down at " + mLastMotionX + "," + mLastMotionY + " mIsBeingDragged=" + mIsBeingDragged + "mIsUnableToDrag=" + mIsUnableToDrag); break; } case MotionEventCompat.ACTION_POINTER_UP: onSecondaryPointerUp(ev); break; } if (!mIsBeingDragged) { // Track the velocity as long as we aren't dragging. // Once we start a real drag we will track in onTouchEvent. if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } mVelocityTracker.addMovement(ev); } /* * The only time we want to intercept motion events is if we are in the * drag mode. */ return mIsBeingDragged; }
From source file:javalibrary.android.ui.VerticalViewPager.java
@Override public boolean onTouchEvent(MotionEvent ev) { if (mFakeDragging) { // A fake drag is in progress already, ignore this real one // but still eat the touch events. // (It is likely that the user is multi-touching the screen.) return true; }//from w w w. jav a 2s . c o m if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { // Don't handle edge touches immediately -- they may actually belong to one of our // 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(); mLastMotionY = mInitialMotionY = ev.getY(); 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 (yDiff > mTouchSlop && yDiff > xDiff) { if (DEBUG) Log.v(TAG, "Starting drag!"); mIsBeingDragged = true; mLastMotionX = x; mLastMotionY = y; 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()); pageScrolled((int) scrollX);*/ final float x = MotionEventCompat.getX(ev, activePointerIndex); final float y = MotionEventCompat.getY(ev, activePointerIndex); final float deltaX = mLastMotionX - x; final float deltaY = mLastMotionY - y; mLastMotionX = x; mLastMotionY = y; float oldScrollX = getScrollX(); float oldScrollY = getScrollY(); float scrollX = oldScrollX + deltaX; float scrollY = oldScrollY + deltaY; final int width = getWidth(); final int widthWithMargin = width + mPageMargin; final int height = getHeight(); final int heightWithMargin = height + mPageMargin; final int lastItemIndex = mAdapter.getCount() - 1; final float leftBound = Math.max(0, (mCurItem - 1) * widthWithMargin); final float topBound = Math.max(0, (mCurItem - 1) * heightWithMargin); final float rightBound = Math.min(mCurItem + 1, lastItemIndex) * widthWithMargin; final float bottomBound = Math.min(mCurItem + 1, lastItemIndex) * heightWithMargin; if (scrollY < topBound) { if (topBound == 0) { float over = -scrollY; needsInvalidate = mTopEdge.onPull(over / width); } scrollY = topBound; } else if (scrollY > bottomBound) { if (bottomBound == lastItemIndex * heightWithMargin) { float over = scrollY - bottomBound; needsInvalidate = mBottomEdge.onPull(over / width); } scrollY = bottomBound; } // Don't lose the rounded component mLastMotionY += scrollY - (int) scrollY; if (DEBUG) Log.v(TAG, "x:" + getScrollX() + ",scrollY:" + scrollY); scrollTo(getScrollX(), (int) scrollY); pageScrolled((int) scrollY); } break; case MotionEvent.ACTION_UP: if (mIsBeingDragged) { final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); /*int initialVelocity = (int) VelocityTrackerCompat.getXVelocity( velocityTracker, mActivePointerId);*/ int initialVelocity = (int) VelocityTrackerCompat.getYVelocity(velocityTracker, mActivePointerId); mPopulatePending = true; final int widthWithMargin = getWidth() + mPageMargin; final int heightWithMargin = getHeight() + mPageMargin; final int scrollX = getScrollX(); int currentPage = scrollX / widthWithMargin; final int scrollY = getScrollY(); currentPage = scrollY / heightWithMargin; // final float pageOffset = (float) (scrollX % widthWithMargin) / widthWithMargin; final float pageOffset = (float) (scrollY % heightWithMargin) / heightWithMargin; final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final float y = MotionEventCompat.getY(ev, activePointerIndex); // final int totalDelta = (int) (x - mInitialMotionX); final int totalDelta = (int) (y - mInitialMotionY); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); setCurrentItemInternal(nextPage, true, true, initialVelocity); mActivePointerId = INVALID_POINTER; endDrag(); // needsInvalidate = mLeftEdge.onRelease() | mRightEdge.onRelease(); needsInvalidate = mTopEdge.onRelease() | mBottomEdge.onRelease(); } break; case MotionEvent.ACTION_CANCEL: if (mIsBeingDragged) { setCurrentItemInternal(mCurItem, true, true); mActivePointerId = INVALID_POINTER; endDrag(); // needsInvalidate = mLeftEdge.onRelease() | mRightEdge.onRelease(); needsInvalidate = mTopEdge.onRelease() | mBottomEdge.onRelease(); } break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); final float x = MotionEventCompat.getX(ev, index); final float y = MotionEventCompat.getY(ev, index); mLastMotionX = x; mLastMotionY = y; mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } case MotionEventCompat.ACTION_POINTER_UP: onSecondaryPointerUp(ev); mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); mLastMotionY = MotionEventCompat.getY(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } if (needsInvalidate) { invalidate(); } return true; }
From source file:administrator.example.com.myscrollview.VerticalViewPager.java
@Override public boolean onInterceptTouchEvent(MotionEvent ev) { /*/* w w w. j av a 2 s . c om*/ * This method JUST determines whether we want to intercept the motion. * If we return true, onMotionEvent will be called and we do the actual * scrolling there. */ final int action = ev.getAction() & MotionEventCompat.ACTION_MASK; // Always take care of the touch gesture being complete. if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) { // Release the drag. if (DEBUG) Log.v(TAG, "Intercept done!"); mIsBeingDragged = false; mIsUnableToDrag = false; mActivePointerId = INVALID_POINTER; if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } /* end of if */ return false; } /* end of if */ // Nothing more to do here if we have decided whether or not we // are dragging. if (action != MotionEvent.ACTION_DOWN) { if (mIsBeingDragged) { if (DEBUG) Log.v(TAG, "Intercept returning true!"); return true; } /* end of if */ if (mIsUnableToDrag) { if (DEBUG) Log.v(TAG, "Intercept returning false!"); return false; } /* end of if */ } /* end of if */ switch (action) { case MotionEvent.ACTION_MOVE: { /* * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check * whether the user has moved far enough from his original down touch. */ /* * Locally do absolute value. mLastMotionX is set to the x value * of the down event. */ final int activePointerId = mActivePointerId; if (activePointerId == INVALID_POINTER) { // If we don't have a valid id, the touch down wasn't on content. break; } /* end of if */ final int pointerIndex = MotionEventCompat.findPointerIndex(ev, activePointerId); final float x = MotionEventCompat.getX(ev, pointerIndex); final float xDiff = Math.abs(x - mLastMotionX); final float y = MotionEventCompat.getY(ev, pointerIndex); final float dy = y - mLastMotionY; final float yDiff = Math.abs(dy); if (DEBUG) Log.v(TAG, "Moved x to " + x + "," + y + " diff=" + xDiff + "," + yDiff); if (canScroll(this, false, (int) dy, (int) x, (int) y)) { // Nested view has scrollable area under this point. Let it be handled there. mInitialMotionY = mLastMotionY = y; mLastMotionX = x; return false; } /* end of if */ if (yDiff > mTouchSlop && yDiff > xDiff) { if (DEBUG) Log.v(TAG, "Starting drag!"); mIsBeingDragged = true; setScrollState(SCROLL_STATE_DRAGGING); mLastMotionY = y; setScrollingCacheEnabled(true); } else { if (xDiff > mTouchSlop) { // The finger has moved enough in the horizontal // direction to be counted as a drag... abort // any attempt to drag vertically, to work correctly // with children that have scrolling containers. if (DEBUG) Log.v(TAG, "Starting unable to drag!"); mIsUnableToDrag = true; } /* end of if */ } /* end of if */ break; } /* end of case */ case MotionEvent.ACTION_DOWN: { /* * Remember location of down touch. * ACTION_DOWN always refers to pointer index 0. */ mLastMotionX = ev.getX(); mLastMotionY = mInitialMotionY = ev.getY(); mActivePointerId = MotionEventCompat.getPointerId(ev, 0); if (mScrollState == SCROLL_STATE_SETTLING) { // Let the user 'catch' the pager as it animates. mIsBeingDragged = true; mIsUnableToDrag = false; setScrollState(SCROLL_STATE_DRAGGING); } else { completeScroll(); mIsBeingDragged = false; mIsUnableToDrag = false; } /* end of if */ if (DEBUG) Log.v(TAG, "Down at " + mLastMotionX + "," + mLastMotionY + " mIsBeingDragged=" + mIsBeingDragged + "mIsUnableToDrag=" + mIsUnableToDrag); break; } /* end of case */ case MotionEventCompat.ACTION_POINTER_UP: onSecondaryPointerUp(ev); break; } /* end of switch */ if (!mIsBeingDragged) { // Track the velocity as long as we aren't dragging. // Once we start a real drag we will track in onTouchEvent. if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } /* end of if */ mVelocityTracker.addMovement(ev); } /* end of if */ /* * The only time we want to intercept motion events is if we are in the * drag mode. */ return mIsBeingDragged; }
From source file:refresh.renyi.io.supperrefreshview.customview.VerticalViewPager.java
@Override public boolean onInterceptTouchEvent(MotionEvent ev) { /*//from w w w .j av a 2s .c om * This method JUST determines whether we want to intercept the motion. * If we return true, onMotionEvent will be called and we do the actual * scrolling there. */ if (DEBUG) System.out.println("ViewPager Intercept"); final int action = ev.getAction() & MotionEventCompat.ACTION_MASK; // Always take care of the touch gesture being complete. if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) { // Release the drag. if (DEBUG) Log.v(TAG, "Intercept done!"); mIsBeingDragged = false; mIsUnableToDrag = false; mActivePointerId = INVALID_POINTER; if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } return false; } // Nothing more to do here if we have decided whether or not we // are dragging. if (action != MotionEvent.ACTION_DOWN) { if (mIsBeingDragged) { if (DEBUG) Log.v(TAG, "Intercept returning true!"); return true; } if (mIsUnableToDrag) { if (DEBUG) Log.v(TAG, "Intercept returning false!"); return false; } } switch (action) { case MotionEvent.ACTION_MOVE: { /* * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check * whether the user has moved far enough from his original down touch. */ /* * Locally do absolute value. mLastMotionY is set to the y value * of the down event. */ final int activePointerId = mActivePointerId; if (activePointerId == INVALID_POINTER) { // If we don't have a valid id, the touch down wasn't on content. break; } final int pointerIndex = MotionEventCompat.findPointerIndex(ev, activePointerId); final float x = MotionEventCompat.getX(ev, pointerIndex); final float dx = x - mLastMotionX; final float xDiff = Math.abs(dx); final float y = MotionEventCompat.getY(ev, pointerIndex); final float dy = y - mLastMotionY; final float yDiff = Math.abs(y - mLastMotionY); if (DEBUG) Log.v(TAG, "Moved x to " + x + "," + y + " diff=" + xDiff + "," + yDiff); // if (canScroll(this, false, (int) dx, (int) x, (int) y)) { if (canScrolls(this, false, (int) dy, (int) x, (int) y)) { // Nested view has scrollable area under this point. Let it be handled there. mInitialMotionX = mLastMotionX = x; mInitialMotionY = mLastMotionY = y; return false; } /*if (xDiff > mTouchSlop && xDiff > yDiff) { if (DEBUG) Log.v(TAG, "Starting drag!"); mIsBeingDragged = true; setScrollState(SCROLL_STATE_DRAGGING); mLastMotionX = x; setScrollingCacheEnabled(true); } else { if (yDiff > mTouchSlop) { // The finger has moved enough in the vertical // direction to be counted as a drag... abort // any attempt to drag horizontally, to work correctly // with children that have scrolling containers. if (DEBUG) Log.v(TAG, "Starting unable to drag!"); mIsUnableToDrag = true; } }*/ if (yDiff > mTouchSlop && yDiff > xDiff) { if (DEBUG) Log.v(TAG, "Starting drag!"); mIsBeingDragged = true; setScrollState(SCROLL_STATE_DRAGGING); mLastMotionX = x; mLastMotionY = y; setScrollingCacheEnabled(true); } else { if (xDiff > mTouchSlop) { // The finger has moved enough in the vertical // direction to be counted as a drag... abort // any attempt to drag horizontally, to work correctly // with children that have scrolling containers. if (DEBUG) Log.v(TAG, "Starting unable to drag!"); mIsUnableToDrag = true; } } break; } case MotionEvent.ACTION_DOWN: { /* * Remember location of down touch. * ACTION_DOWN always refers to pointer index 0. */ mLastMotionX = mInitialMotionX = ev.getX(); mLastMotionY = mInitialMotionY = ev.getY(); mActivePointerId = MotionEventCompat.getPointerId(ev, 0); if (mScrollState == SCROLL_STATE_SETTLING) { // Let the user 'catch' the pager as it animates. mIsBeingDragged = true; mIsUnableToDrag = false; setScrollState(SCROLL_STATE_DRAGGING); } else { completeScroll(); mIsBeingDragged = false; mIsUnableToDrag = false; } if (DEBUG) Log.v(TAG, "Down at " + mLastMotionX + "," + mLastMotionY + " mIsBeingDragged=" + mIsBeingDragged + "mIsUnableToDrag=" + mIsUnableToDrag); break; } case MotionEventCompat.ACTION_POINTER_UP: onSecondaryPointerUp(ev); break; } if (!mIsBeingDragged) { // Track the velocity as long as we aren't dragging. // Once we start a real drag we will track in onTouchEvent. if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } mVelocityTracker.addMovement(ev); } /* * The only time we want to intercept motion events is if we are in the * drag mode. */ // super.onInterceptTouchEvent(ev); return mIsBeingDragged; }
From source file:administrator.example.com.myscrollview.VerticalViewPager.java
@Override public boolean onTouchEvent(MotionEvent ev) { if (mFakeDragging) { // A fake drag is in progress already, ignore this real one // but still eat the touch events. // (It is likely that the user is multi-touching the screen.) return true; } /* end of if */ if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { // Don't handle edge touches immediately -- they may actually belong to one of our // descendants. return false; } /* end of if */ if (mAdapter == null || mAdapter.getCount() == 0) { // Nothing to present or scroll; nothing to touch. return false; } /* end of if */ if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } /* end of if */ mVelocityTracker.addMovement(ev);// www.j ava 2 s . c o m 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 mLastMotionY = mInitialMotionY = ev.getY(); mActivePointerId = MotionEventCompat.getPointerId(ev, 0); break; } /* end of case */ 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 (yDiff > mTouchSlop && yDiff > xDiff) { if (DEBUG) Log.v(TAG, "Starting drag!"); mIsBeingDragged = true; mLastMotionY = y; setScrollState(SCROLL_STATE_DRAGGING); setScrollingCacheEnabled(true); } /* end of if */ } /* end of if */ if (mIsBeingDragged) { // Scroll to follow the motion event final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float y = MotionEventCompat.getY(ev, activePointerIndex); final float deltaY = mLastMotionY - y; mLastMotionY = y; float oldScrollY = getScrollY(); float scrollY = oldScrollY + deltaY; final int height = getHeight(); final int heightWithMargin = height + mPageMargin; final int lastItemIndex = mAdapter.getCount() - 1; final float topBound = Math.max(0, (mCurItem - 1) * heightWithMargin); final float bottomBound = Math.min(mCurItem + 1, lastItemIndex) * heightWithMargin; if (scrollY < topBound) { if (topBound == 0) { float over = -scrollY; needsInvalidate = mTopEdge.onPull(over / height); } /* end of if */ scrollY = topBound; } else if (scrollY > bottomBound) { if (bottomBound == lastItemIndex * heightWithMargin) { float over = scrollY - bottomBound; needsInvalidate = mBottomEdge.onPull(over / height); } /* end of if */ scrollY = bottomBound; } /* end of if */ // Don't lose the rounded component mLastMotionY += scrollY - (int) scrollY; scrollTo(getScrollX(), (int) scrollY); pageScrolled((int) scrollY); } /* end of if */ break; case MotionEvent.ACTION_UP: if (mIsBeingDragged) { final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); int initialVelocity = (int) VelocityTrackerCompat.getYVelocity(velocityTracker, mActivePointerId); mPopulatePending = true; final int heightWithMargin = getHeight() + mPageMargin; final int scrollY = getScrollY(); final int currentPage = scrollY / heightWithMargin; final float pageOffset = (float) (scrollY % heightWithMargin) / heightWithMargin; final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float y = MotionEventCompat.getY(ev, activePointerIndex); final int totalDelta = (int) (y - mInitialMotionY); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); setCurrentItemInternal(nextPage, true, true, initialVelocity); mActivePointerId = INVALID_POINTER; endDrag(); needsInvalidate = mTopEdge.onRelease() | mBottomEdge.onRelease(); } /* end of if */ break; case MotionEvent.ACTION_CANCEL: if (mIsBeingDragged) { setCurrentItemInternal(mCurItem, true, true); mActivePointerId = INVALID_POINTER; endDrag(); needsInvalidate = mTopEdge.onRelease() | mBottomEdge.onRelease(); } /* end of if */ break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); final float y = MotionEventCompat.getY(ev, index); mLastMotionY = y; mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } /* end of case */ case MotionEventCompat.ACTION_POINTER_UP: onSecondaryPointerUp(ev); mLastMotionY = MotionEventCompat.getY(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } /* end of switch */ if (needsInvalidate) { invalidate(); } /* end of if */ return true; }