public override bool dispatchTouchEvent(android.view.MotionEvent ev)
{
if (mDefaultTouchRecepient == null)
{
return base.dispatchTouchEvent(ev);
}
if (base.dispatchTouchEvent(ev))
{
return true;
}
mTempRect.set(0, 0, 0, 0);
offsetRectIntoDescendantCoords(mDefaultTouchRecepient, mTempRect);
ev.setLocation(ev.getX() + mTempRect.left, ev.getY() + mTempRect.top);
return mDefaultTouchRecepient.dispatchTouchEvent(ev);
}
private void onSecondaryPointerUp(android.view.MotionEvent ev)
{
int pointerIndex = (ev.getAction() & android.view.MotionEvent.ACTION_POINTER_INDEX_MASK
) >> android.view.MotionEvent.ACTION_POINTER_INDEX_SHIFT;
int pointerId = ev.getPointerId(pointerIndex);
if (pointerId == mActivePointerId)
{
// This was our active pointer going up. Choose a new
// active pointer and adjust accordingly.
// TODO: Make this decision more intelligent.
int newPointerIndex = pointerIndex == 0 ? 1 : 0;
mLastMotionX = ev.getX(newPointerIndex);
mActivePointerId = ev.getPointerId(newPointerIndex);
if (mVelocityTracker != null)
{
mVelocityTracker.clear();
}
}
}
private bool isConsideredDoubleTap(android.view.MotionEvent firstDown, android.view.MotionEvent
firstUp, android.view.MotionEvent secondDown)
{
if (!mAlwaysInBiggerTapRegion)
{
return false;
}
if (secondDown.getEventTime() - firstUp.getEventTime() > DOUBLE_TAP_TIMEOUT)
{
return false;
}
int deltaX = (int)firstDown.getX() - (int)secondDown.getX();
int deltaY = (int)firstDown.getY() - (int)secondDown.getY();
return (deltaX * deltaX + deltaY * deltaY < mDoubleTapSlopSquare);
}
public override bool onTouchEvent(android.view.MotionEvent @event)
{
if (!mIsUserSeekable || !isEnabled())
{
return false;
}
switch (@event.getAction())
{
case android.view.MotionEvent.ACTION_DOWN:
{
if (isInScrollingContainer())
{
mTouchDownX = @event.getX();
}
else
{
setPressed(true);
if (mThumb != null)
{
invalidate(mThumb.getBounds());
}
// This may be within the padding region
onStartTrackingTouch();
trackTouchEvent(@event);
attemptClaimDrag();
}
break;
}
case android.view.MotionEvent.ACTION_MOVE:
{
if (mIsDragging)
{
trackTouchEvent(@event);
}
else
{
float x = @event.getX();
if (System.Math.Abs(x - mTouchDownX) > mScaledTouchSlop)
{
setPressed(true);
if (mThumb != null)
{
invalidate(mThumb.getBounds());
}
// This may be within the padding region
onStartTrackingTouch();
trackTouchEvent(@event);
attemptClaimDrag();
}
}
break;
}
case android.view.MotionEvent.ACTION_UP:
{
if (mIsDragging)
{
trackTouchEvent(@event);
onStopTrackingTouch();
setPressed(false);
}
else
{
// Touch up when we never crossed the touch slop threshold should
// be interpreted as a tap-seek to that location.
onStartTrackingTouch();
trackTouchEvent(@event);
onStopTrackingTouch();
}
// ProgressBar doesn't know to repaint the thumb drawable
// in its inactive state when the touch stops (because the
// value has not apparently changed)
invalidate();
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
{
if (mIsDragging)
{
onStopTrackingTouch();
setPressed(false);
}
invalidate();
// see above explanation
break;
}
}
return true;
}
public virtual bool onTouch(android.view.View v, android.view.MotionEvent @event)
{
int action = @event.getAction();
int x = (int)@event.getX();
int y = (int)@event.getY();
if (action == android.view.MotionEvent.ACTION_DOWN && this._enclosing.mPopup != null
&& this._enclosing.mPopup.isShowing() && (x >= 0 && x < this._enclosing.mPopup.
getWidth() && y >= 0 && y < this._enclosing.mPopup.getHeight()))
{
this._enclosing.mHandler.postDelayed(this._enclosing.mResizePopupRunnable, android.widget.ListPopupWindow
.EXPAND_LIST_TIMEOUT);
}
else
{
if (action == android.view.MotionEvent.ACTION_UP)
{
this._enclosing.mHandler.removeCallbacks(this._enclosing.mResizePopupRunnable);
}
}
return false;
}
protected internal override bool dispatchGenericPointerEvent(android.view.MotionEvent
@event)
{
// Send the event to the child under the pointer.
int childrenCount = mChildrenCount;
if (childrenCount != 0)
{
android.view.View[] children = mChildren;
float x = @event.getX();
float y = @event.getY();
{
for (int i = childrenCount - 1; i >= 0; i--)
{
android.view.View child = children[i];
if (!canViewReceivePointerEvents(child) || !isTransformedTouchPointInView(x, y, child
, null))
{
continue;
}
if (dispatchTransformedGenericPointerEvent(@event, child))
{
return true;
}
}
}
}
// No child handled the event. Send it to this view group.
return base.dispatchGenericPointerEvent(@event);
}
public virtual bool onDown(android.view.MotionEvent e)
{
// Kill any existing fling/scroll
mFlingRunnable.stop(false);
// Get the item's view that was touched
mDownTouchPosition = pointToPosition((int)e.getX(), (int)e.getY());
if (mDownTouchPosition >= 0)
{
mDownTouchView = getChildAt(mDownTouchPosition - mFirstPosition);
mDownTouchView.setPressed(true);
}
// Reset the multiple-scroll tracking state
mIsFirstScroll = true;
// Must return true to get matching events for this down event.
return true;
}
/// <summary>MotionEvent has no getRawX(int) method; simulate it pending future API approval.
/// </summary>
/// <remarks>MotionEvent has no getRawX(int) method; simulate it pending future API approval.
/// </remarks>
private static float getRawX(android.view.MotionEvent @event, int pointerIndex)
{
if (pointerIndex < 0)
{
return float.MinValue;
}
if (pointerIndex == 0)
{
return @event.getRawX();
}
float offset = @event.getRawX() - @event.getX();
return @event.getX(pointerIndex) + offset;
}
public override bool onTouchEvent(android.view.MotionEvent ev)
{
base.onTouchEvent(ev);
int action = ev.getAction();
int pointerIndex = ev.findPointerIndex(mActivePointerId);
if (pointerIndex == INVALID_POINTER)
{
// no data for our primary pointer, this shouldn't happen, log it
android.util.Log.d(TAG, "Error: No data for our primary pointer.");
return false;
}
float newY = ev.getY(pointerIndex);
float newX = ev.getX(pointerIndex);
float deltaY = newY - mInitialY;
float deltaX = newX - mInitialX;
if (mVelocityTracker == null)
{
mVelocityTracker = android.view.VelocityTracker.obtain();
}
mVelocityTracker.addMovement(ev);
switch (action & android.view.MotionEvent.ACTION_MASK)
{
case android.view.MotionEvent.ACTION_MOVE:
{
beginGestureIfNeeded(deltaY);
float rx = deltaX / (mSlideAmount * 1.0f);
if (mSwipeGestureType == GESTURE_SLIDE_DOWN)
{
float r = (deltaY - mTouchSlop * 1.0f) / mSlideAmount * 1.0f;
if (mStackMode == ITEMS_SLIDE_DOWN)
{
r = 1 - r;
}
mStackSlider.setYProgress(1 - r);
mStackSlider.setXProgress(rx);
return true;
}
else
{
if (mSwipeGestureType == GESTURE_SLIDE_UP)
{
float r = -(deltaY + mTouchSlop * 1.0f) / mSlideAmount * 1.0f;
if (mStackMode == ITEMS_SLIDE_DOWN)
{
r = 1 - r;
}
mStackSlider.setYProgress(r);
mStackSlider.setXProgress(rx);
return true;
}
}
break;
}
case android.view.MotionEvent.ACTION_UP:
{
handlePointerUp(ev);
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
onSecondaryPointerUp(ev);
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
{
mActivePointerId = INVALID_POINTER;
mSwipeGestureType = GESTURE_NONE;
break;
}
}
return true;
}
public override bool onInterceptTouchEvent(android.view.MotionEvent ev)
{
int action = ev.getAction();
switch (action & android.view.MotionEvent.ACTION_MASK)
{
case android.view.MotionEvent.ACTION_DOWN:
{
if (mActivePointerId == INVALID_POINTER)
{
mInitialX = ev.getX();
mInitialY = ev.getY();
mActivePointerId = ev.getPointerId(0);
}
break;
}
case android.view.MotionEvent.ACTION_MOVE:
{
int pointerIndex = ev.findPointerIndex(mActivePointerId);
if (pointerIndex == INVALID_POINTER)
{
// no data for our primary pointer, this shouldn't happen, log it
android.util.Log.d(TAG, "Error: No data for our primary pointer.");
return false;
}
float newY = ev.getY(pointerIndex);
float deltaY = newY - mInitialY;
beginGestureIfNeeded(deltaY);
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
onSecondaryPointerUp(ev);
break;
}
case android.view.MotionEvent.ACTION_UP:
case android.view.MotionEvent.ACTION_CANCEL:
{
mActivePointerId = INVALID_POINTER;
mSwipeGestureType = GESTURE_NONE;
break;
}
}
return mSwipeGestureType != GESTURE_NONE;
}
public override bool onInterceptTouchEvent(android.view.MotionEvent ev)
{
int action = ev.getAction();
if ((action == android.view.MotionEvent.ACTION_MOVE) && (mIsBeingDragged))
{
return true;
}
switch (action & android.view.MotionEvent.ACTION_MASK)
{
case android.view.MotionEvent.ACTION_MOVE:
{
int activePointerId = mActivePointerId;
if (activePointerId == INVALID_POINTER)
{
// If we don't have a valid id, the touch down wasn't on content.
break;
}
int pointerIndex = ev.findPointerIndex(activePointerId);
float y = ev.getY(pointerIndex);
int yDiff = (int)System.Math.Abs(y - mLastMotionY);
if (yDiff > mTouchSlop)
{
mIsBeingDragged = true;
mLastMotionY = y;
initVelocityTrackerIfNotExists();
mVelocityTracker.addMovement(ev);
if (mScrollStrictSpan == null)
{
mScrollStrictSpan = android.os.StrictMode.enterCriticalSpan("ScrollView-scroll");
}
}
break;
}
case android.view.MotionEvent.ACTION_DOWN:
{
float y = ev.getY();
if (!inChild((int)ev.getX(), (int)y))
{
mIsBeingDragged = false;
recycleVelocityTracker();
break;
}
mLastMotionY = y;
mActivePointerId = ev.getPointerId(0);
initOrResetVelocityTracker();
mVelocityTracker.addMovement(ev);
mIsBeingDragged = !mScroller.isFinished();
if (mIsBeingDragged && mScrollStrictSpan == null)
{
mScrollStrictSpan = android.os.StrictMode.enterCriticalSpan("ScrollView-scroll");
}
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
case android.view.MotionEvent.ACTION_UP:
{
mIsBeingDragged = false;
mActivePointerId = INVALID_POINTER;
recycleVelocityTracker();
if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange()))
{
invalidate();
}
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
onSecondaryPointerUp(ev);
break;
}
}
return mIsBeingDragged;
}
internal virtual bool onTouchEvent(android.view.MotionEvent me)
{
if (mState == STATE_NONE)
{
return false;
}
int action = me.getAction();
if (action == android.view.MotionEvent.ACTION_DOWN)
{
if (isPointInside(me.getX(), me.getY()))
{
if (!mList.isInScrollingContainer())
{
beginDrag();
return true;
}
mInitialTouchY = me.getY();
startPendingDrag();
}
}
else
{
if (action == android.view.MotionEvent.ACTION_UP)
{
// don't add ACTION_CANCEL here
if (mPendingDrag)
{
// Allow a tap to scroll.
beginDrag();
int viewHeight = mList.getHeight();
// Jitter
int newThumbY = (int)me.getY() - mThumbH + 10;
if (newThumbY < 0)
{
newThumbY = 0;
}
else
{
if (newThumbY + mThumbH > viewHeight)
{
newThumbY = viewHeight - mThumbH;
}
}
mThumbY = newThumbY;
scrollTo((float)mThumbY / (viewHeight - mThumbH));
cancelPendingDrag();
}
// Will hit the STATE_DRAGGING check below
if (mState == STATE_DRAGGING)
{
if (mList != null)
{
// ViewGroup does the right thing already, but there might
// be other classes that don't properly reset on touch-up,
// so do this explicitly just in case.
mList.requestDisallowInterceptTouchEvent(false);
mList.reportScrollStateChange(android.widget.AbsListView.OnScrollListenerClass.SCROLL_STATE_IDLE
);
}
setState(STATE_VISIBLE);
android.os.Handler handler = mHandler;
handler.removeCallbacks(mScrollFade);
if (!mAlwaysShow)
{
handler.postDelayed(mScrollFade, 1000);
}
mList.invalidate();
return true;
}
}
else
{
if (action == android.view.MotionEvent.ACTION_MOVE)
{
if (mPendingDrag)
{
float y = me.getY();
if (System.Math.Abs(y - mInitialTouchY) > mScaledTouchSlop)
{
setState(STATE_DRAGGING);
if (mListAdapter == null && mList != null)
{
getSectionsFromIndexer();
}
if (mList != null)
{
mList.requestDisallowInterceptTouchEvent(true);
mList.reportScrollStateChange(android.widget.AbsListView.OnScrollListenerClass.SCROLL_STATE_TOUCH_SCROLL
);
}
cancelFling();
cancelPendingDrag();
}
}
// Will hit the STATE_DRAGGING check below
if (mState == STATE_DRAGGING)
{
int viewHeight = mList.getHeight();
// Jitter
int newThumbY = (int)me.getY() - mThumbH + 10;
if (newThumbY < 0)
{
newThumbY = 0;
}
else
{
if (newThumbY + mThumbH > viewHeight)
{
newThumbY = viewHeight - mThumbH;
}
}
if (System.Math.Abs(mThumbY - newThumbY) < 2)
{
return true;
}
mThumbY = newThumbY;
// If the previous scrollTo is still pending
if (mScrollCompleted)
{
scrollTo((float)mThumbY / (viewHeight - mThumbH));
}
return true;
}
}
else
{
if (action == android.view.MotionEvent.ACTION_CANCEL)
{
cancelPendingDrag();
}
}
}
}
return false;
}
internal virtual bool onInterceptTouchEvent(android.view.MotionEvent ev)
{
switch (ev.getActionMasked())
{
case android.view.MotionEvent.ACTION_DOWN:
{
if (mState > STATE_NONE && isPointInside(ev.getX(), ev.getY()))
{
if (!mList.isInScrollingContainer())
{
beginDrag();
return true;
}
mInitialTouchY = ev.getY();
startPendingDrag();
}
break;
}
case android.view.MotionEvent.ACTION_UP:
case android.view.MotionEvent.ACTION_CANCEL:
{
cancelPendingDrag();
break;
}
}
return false;
}
private bool isOutOfBounds(android.content.Context context, android.view.MotionEvent
@event)
{
int x = (int)@event.getX();
int y = (int)@event.getY();
int slop = android.view.ViewConfiguration.get(context).getScaledWindowTouchSlop();
android.view.View decorView = getDecorView();
return (x < -slop) || (y < -slop) || (x > (decorView.getWidth() + slop)) || (y >
(decorView.getHeight() + slop));
}
/// <returns>If the <code>event</code> is in the <code>view</code>.</returns>
private bool isEventInViewHitRect(android.view.MotionEvent @event, android.view.View
view)
{
view.getHitRect(mTempRect);
return mTempRect.contains((int)@event.getX(), (int)@event.getY());
}
public virtual bool onTouchEvent(android.view.MotionEvent @event)
{
if (mInputEventConsistencyVerifier != null)
{
mInputEventConsistencyVerifier.onTouchEvent(@event, 0);
}
int action = @event.getActionMasked();
if (action == android.view.MotionEvent.ACTION_DOWN)
{
reset();
}
// Start fresh
bool handled = true;
if (mInvalidGesture)
{
handled = false;
}
else
{
if (!mGestureInProgress)
{
switch (action)
{
case android.view.MotionEvent.ACTION_DOWN:
{
mActiveId0 = @event.getPointerId(0);
mActive0MostRecent = true;
break;
}
case android.view.MotionEvent.ACTION_UP:
{
reset();
break;
}
case android.view.MotionEvent.ACTION_POINTER_DOWN:
{
// We have a new multi-finger gesture
// as orientation can change, query the metrics in touch down
android.util.DisplayMetrics metrics = mContext.getResources().getDisplayMetrics();
mRightSlopEdge = metrics.widthPixels - mEdgeSlop;
mBottomSlopEdge = metrics.heightPixels - mEdgeSlop;
if (mPrevEvent != null)
{
mPrevEvent.recycle();
}
mPrevEvent = android.view.MotionEvent.obtain(@event);
mTimeDelta = 0;
int index1 = @event.getActionIndex();
int index0 = @event.findPointerIndex(mActiveId0);
mActiveId1 = @event.getPointerId(index1);
if (index0 < 0 || index0 == index1)
{
// Probably someone sending us a broken event stream.
index0 = findNewActiveIndex(@event, index0 == index1 ? -1 : mActiveId1, index0);
mActiveId0 = @event.getPointerId(index0);
}
mActive0MostRecent = false;
setContext(@event);
// Check if we have a sloppy gesture. If so, delay
// the beginning of the gesture until we're sure that's
// what the user wanted. Sloppy gestures can happen if the
// edge of the user's hand is touching the screen, for example.
float edgeSlop = mEdgeSlop;
float rightSlop = mRightSlopEdge;
float bottomSlop = mBottomSlopEdge;
float x0 = getRawX(@event, index0);
float y0 = getRawY(@event, index0);
float x1 = getRawX(@event, index1);
float y1 = getRawY(@event, index1);
bool p0sloppy = x0 < edgeSlop || y0 < edgeSlop || x0 > rightSlop || y0 > bottomSlop;
bool p1sloppy = x1 < edgeSlop || y1 < edgeSlop || x1 > rightSlop || y1 > bottomSlop;
if (p0sloppy && p1sloppy)
{
mFocusX = -1;
mFocusY = -1;
mSloppyGesture = true;
}
else
{
if (p0sloppy)
{
mFocusX = @event.getX(index1);
mFocusY = @event.getY(index1);
mSloppyGesture = true;
}
else
{
if (p1sloppy)
{
mFocusX = @event.getX(index0);
mFocusY = @event.getY(index0);
mSloppyGesture = true;
}
else
{
mSloppyGesture = false;
mGestureInProgress = mListener.onScaleBegin(this);
}
}
}
break;
}
case android.view.MotionEvent.ACTION_MOVE:
{
if (mSloppyGesture)
{
// Initiate sloppy gestures if we've moved outside of the slop area.
float edgeSlop = mEdgeSlop;
float rightSlop = mRightSlopEdge;
float bottomSlop = mBottomSlopEdge;
int index0 = @event.findPointerIndex(mActiveId0);
int index1 = @event.findPointerIndex(mActiveId1);
float x0 = getRawX(@event, index0);
float y0 = getRawY(@event, index0);
float x1 = getRawX(@event, index1);
float y1 = getRawY(@event, index1);
bool p0sloppy = x0 < edgeSlop || y0 < edgeSlop || x0 > rightSlop || y0 > bottomSlop;
bool p1sloppy = x1 < edgeSlop || y1 < edgeSlop || x1 > rightSlop || y1 > bottomSlop;
if (p0sloppy)
{
// Do we have a different pointer that isn't sloppy?
int index = findNewActiveIndex(@event, mActiveId1, index0);
if (index >= 0)
{
index0 = index;
mActiveId0 = @event.getPointerId(index);
x0 = getRawX(@event, index);
y0 = getRawY(@event, index);
p0sloppy = false;
}
}
if (p1sloppy)
{
// Do we have a different pointer that isn't sloppy?
int index = findNewActiveIndex(@event, mActiveId0, index1);
if (index >= 0)
{
index1 = index;
mActiveId1 = @event.getPointerId(index);
x1 = getRawX(@event, index);
y1 = getRawY(@event, index);
p1sloppy = false;
}
}
if (p0sloppy && p1sloppy)
{
mFocusX = -1;
mFocusY = -1;
}
else
{
if (p0sloppy)
{
mFocusX = @event.getX(index1);
mFocusY = @event.getY(index1);
}
else
{
if (p1sloppy)
{
mFocusX = @event.getX(index0);
mFocusY = @event.getY(index0);
}
else
{
mSloppyGesture = false;
mGestureInProgress = mListener.onScaleBegin(this);
}
}
}
}
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
if (mSloppyGesture)
{
int pointerCount = @event.getPointerCount();
int actionIndex = @event.getActionIndex();
int actionId = @event.getPointerId(actionIndex);
if (pointerCount > 2)
{
if (actionId == mActiveId0)
{
int newIndex = findNewActiveIndex(@event, mActiveId1, actionIndex);
if (newIndex >= 0)
{
mActiveId0 = @event.getPointerId(newIndex);
}
}
else
{
if (actionId == mActiveId1)
{
int newIndex = findNewActiveIndex(@event, mActiveId0, actionIndex);
if (newIndex >= 0)
{
mActiveId1 = @event.getPointerId(newIndex);
}
}
}
}
else
{
// Set focus point to the remaining finger
int index = @event.findPointerIndex(actionId == mActiveId0 ? mActiveId1 : mActiveId0
);
if (index < 0)
{
mInvalidGesture = true;
android.util.Log.e(TAG, "Invalid MotionEvent stream detected.", new System.Exception
());
if (mGestureInProgress)
{
mListener.onScaleEnd(this);
}
return false;
}
mActiveId0 = @event.getPointerId(index);
mActive0MostRecent = true;
mActiveId1 = -1;
mFocusX = @event.getX(index);
mFocusY = @event.getY(index);
}
}
break;
}
}
}
else
{
switch (action)
{
case android.view.MotionEvent.ACTION_POINTER_DOWN:
{
// Transform gesture in progress - attempt to handle it
// End the old gesture and begin a new one with the most recent two fingers.
mListener.onScaleEnd(this);
int oldActive0 = mActiveId0;
int oldActive1 = mActiveId1;
reset();
mPrevEvent = android.view.MotionEvent.obtain(@event);
mActiveId0 = mActive0MostRecent ? oldActive0 : oldActive1;
mActiveId1 = @event.getPointerId(@event.getActionIndex());
mActive0MostRecent = false;
int index0 = @event.findPointerIndex(mActiveId0);
if (index0 < 0 || mActiveId0 == mActiveId1)
{
// Probably someone sending us a broken event stream.
android.util.Log.e(TAG, "Got " + android.view.MotionEvent.actionToString(action)
+ " with bad state while a gesture was in progress. " + "Did you forget to pass an event to "
+ "ScaleGestureDetector#onTouchEvent?");
index0 = findNewActiveIndex(@event, mActiveId0 == mActiveId1 ? -1 : mActiveId1, index0
);
mActiveId0 = @event.getPointerId(index0);
}
setContext(@event);
mGestureInProgress = mListener.onScaleBegin(this);
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
int pointerCount = @event.getPointerCount();
int actionIndex = @event.getActionIndex();
int actionId = @event.getPointerId(actionIndex);
bool gestureEnded = false;
if (pointerCount > 2)
{
if (actionId == mActiveId0)
{
int newIndex = findNewActiveIndex(@event, mActiveId1, actionIndex);
if (newIndex >= 0)
{
mListener.onScaleEnd(this);
mActiveId0 = @event.getPointerId(newIndex);
mActive0MostRecent = true;
mPrevEvent = android.view.MotionEvent.obtain(@event);
setContext(@event);
mGestureInProgress = mListener.onScaleBegin(this);
}
else
{
gestureEnded = true;
}
}
else
{
if (actionId == mActiveId1)
{
int newIndex = findNewActiveIndex(@event, mActiveId0, actionIndex);
if (newIndex >= 0)
{
mListener.onScaleEnd(this);
mActiveId1 = @event.getPointerId(newIndex);
mActive0MostRecent = false;
mPrevEvent = android.view.MotionEvent.obtain(@event);
setContext(@event);
mGestureInProgress = mListener.onScaleBegin(this);
}
else
{
gestureEnded = true;
}
}
}
mPrevEvent.recycle();
mPrevEvent = android.view.MotionEvent.obtain(@event);
setContext(@event);
}
else
{
gestureEnded = true;
}
if (gestureEnded)
{
// Gesture ended
setContext(@event);
// Set focus point to the remaining finger
int activeId = actionId == mActiveId0 ? mActiveId1 : mActiveId0;
int index = @event.findPointerIndex(activeId);
mFocusX = @event.getX(index);
mFocusY = @event.getY(index);
mListener.onScaleEnd(this);
reset();
mActiveId0 = activeId;
mActive0MostRecent = true;
}
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
{
mListener.onScaleEnd(this);
reset();
break;
}
case android.view.MotionEvent.ACTION_UP:
{
reset();
break;
}
case android.view.MotionEvent.ACTION_MOVE:
{
setContext(@event);
// Only accept the event if our relative pressure is within
// a certain limit - this can help filter shaky data as a
// finger is lifted.
if (mCurrPressure / mPrevPressure > PRESSURE_THRESHOLD)
{
bool updatePrevious = mListener.onScale(this);
if (updatePrevious)
{
mPrevEvent.recycle();
mPrevEvent = android.view.MotionEvent.obtain(@event);
}
}
break;
}
}
}
}
if (!handled && mInputEventConsistencyVerifier != null)
{
mInputEventConsistencyVerifier.onUnhandledEvent(@event, 0);
}
return handled;
}
private void onSecondaryPointerUp(android.view.MotionEvent ev)
{
int activePointerIndex = ev.getActionIndex();
int pointerId = ev.getPointerId(activePointerIndex);
if (pointerId == mActivePointerId)
{
int activeViewIndex = (mSwipeGestureType == GESTURE_SLIDE_DOWN) ? 0 : 1;
android.view.View v = getViewAtRelativeIndex(activeViewIndex);
if (v == null)
{
return;
}
{
// Our primary pointer has gone up -- let's see if we can find
// another pointer on the view. If so, then we should replace
// our primary pointer with this new pointer and adjust things
// so that the view doesn't jump
for (int index = 0; index < ev.getPointerCount(); index++)
{
if (index != activePointerIndex)
{
float x = ev.getX(index);
float y = ev.getY(index);
mTouchRect.set(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
if (mTouchRect.contains(Sharpen.Util.Round(x), Sharpen.Util.Round(y)))
{
float oldX = ev.getX(activePointerIndex);
float oldY = ev.getY(activePointerIndex);
// adjust our frame of reference to avoid a jump
mInitialY += (y - oldY);
mInitialX += (x - oldX);
mActivePointerId = ev.getPointerId(index);
if (mVelocityTracker != null)
{
mVelocityTracker.clear();
}
// ok, we're good, we found a new pointer which is touching the active view
return;
}
}
}
}
// if we made it this far, it means we didn't find a satisfactory new pointer :(,
// so end the gesture
handlePointerUp(ev);
}
}
private void setContext(android.view.MotionEvent curr)
{
if (mCurrEvent != null)
{
mCurrEvent.recycle();
}
mCurrEvent = android.view.MotionEvent.obtain(curr);
mCurrLen = -1;
mPrevLen = -1;
mScaleFactor = -1;
android.view.MotionEvent prev = mPrevEvent;
int prevIndex0 = prev.findPointerIndex(mActiveId0);
int prevIndex1 = prev.findPointerIndex(mActiveId1);
int currIndex0 = curr.findPointerIndex(mActiveId0);
int currIndex1 = curr.findPointerIndex(mActiveId1);
if (prevIndex0 < 0 || prevIndex1 < 0 || currIndex0 < 0 || currIndex1 < 0)
{
mInvalidGesture = true;
android.util.Log.e(TAG, "Invalid MotionEvent stream detected.", new System.Exception
());
if (mGestureInProgress)
{
mListener.onScaleEnd(this);
}
return;
}
float px0 = prev.getX(prevIndex0);
float py0 = prev.getY(prevIndex0);
float px1 = prev.getX(prevIndex1);
float py1 = prev.getY(prevIndex1);
float cx0 = curr.getX(currIndex0);
float cy0 = curr.getY(currIndex0);
float cx1 = curr.getX(currIndex1);
float cy1 = curr.getY(currIndex1);
float pvx = px1 - px0;
float pvy = py1 - py0;
float cvx = cx1 - cx0;
float cvy = cy1 - cy0;
mPrevFingerDiffX = pvx;
mPrevFingerDiffY = pvy;
mCurrFingerDiffX = cvx;
mCurrFingerDiffY = cvy;
mFocusX = cx0 + cvx * 0.5f;
mFocusY = cy0 + cvy * 0.5f;
mTimeDelta = curr.getEventTime() - prev.getEventTime();
mCurrPressure = curr.getPressure(currIndex0) + curr.getPressure(currIndex1);
mPrevPressure = prev.getPressure(prevIndex0) + prev.getPressure(prevIndex1);
}
public override bool onTouchEvent(android.widget.TextView widget, android.text.Spannable
buffer, android.view.MotionEvent @event)
{
int initialScrollX = -1;
int initialScrollY = -1;
int action = @event.getAction();
if (action == android.view.MotionEvent.ACTION_UP)
{
initialScrollX = android.text.method.Touch.getInitialScrollX(widget, buffer);
initialScrollY = android.text.method.Touch.getInitialScrollY(widget, buffer);
}
bool handled = android.text.method.Touch.onTouchEvent(widget, buffer, @event);
if (widget.isFocused() && !widget.didTouchFocusSelect())
{
if (action == android.view.MotionEvent.ACTION_DOWN)
{
if (isSelecting(buffer))
{
int offset = widget.getOffsetForPosition(@event.getX(), @event.getY());
buffer.setSpan(LAST_TAP_DOWN, offset, offset, android.text.SpannedClass.SPAN_POINT_POINT
);
// Disallow intercepting of the touch events, so that
// users can scroll and select at the same time.
// without this, users would get booted out of select
// mode once the view detected it needed to scroll.
widget.getParent().requestDisallowInterceptTouchEvent(true);
}
}
else
{
if (action == android.view.MotionEvent.ACTION_MOVE)
{
if (isSelecting(buffer) && handled)
{
// Before selecting, make sure we've moved out of the "slop".
// handled will be true, if we're in select mode AND we're
// OUT of the slop
// Turn long press off while we're selecting. User needs to
// re-tap on the selection to enable long press
widget.cancelLongPress();
// Update selection as we're moving the selection area.
// Get the current touch position
int offset = widget.getOffsetForPosition(@event.getX(), @event.getY());
android.text.Selection.extendSelection(buffer, offset);
return true;
}
}
else
{
if (action == android.view.MotionEvent.ACTION_UP)
{
// If we have scrolled, then the up shouldn't move the cursor,
// but we do need to make sure the cursor is still visible at
// the current scroll offset to avoid the scroll jumping later
// to show it.
if ((initialScrollY >= 0 && initialScrollY != widget.getScrollY()) || (initialScrollX
>= 0 && initialScrollX != widget.getScrollX()))
{
widget.moveCursorToVisibleOffset();
return true;
}
int offset = widget.getOffsetForPosition(@event.getX(), @event.getY());
if (isSelecting(buffer))
{
buffer.removeSpan(LAST_TAP_DOWN);
android.text.Selection.extendSelection(buffer, offset);
}
else
{
if (!widget.shouldIgnoreActionUpEvent())
{
android.text.Selection.setSelection(buffer, offset);
}
}
android.text.method.MetaKeyKeyListener.adjustMetaAfterKeypress(buffer);
android.text.method.MetaKeyKeyListener.resetLockedMeta(buffer);
return true;
}
}
}
}
return handled;
}
protected internal override bool dispatchHoverEvent(android.view.MotionEvent @event
)
{
int action = @event.getAction();
// First check whether the view group wants to intercept the hover event.
bool interceptHover = onInterceptHoverEvent(@event);
@event.setAction(action);
// restore action in case it was changed
android.view.MotionEvent eventNoHistory = @event;
bool handled = false;
// Send events to the hovered children and build a new list of hover targets until
// one is found that handles the event.
android.view.ViewGroup.HoverTarget firstOldHoverTarget = mFirstHoverTarget;
mFirstHoverTarget = null;
if (!interceptHover && action != android.view.MotionEvent.ACTION_HOVER_EXIT)
{
float x = @event.getX();
float y = @event.getY();
int childrenCount = mChildrenCount;
if (childrenCount != 0)
{
android.view.View[] children = mChildren;
android.view.ViewGroup.HoverTarget lastHoverTarget = null;
{
for (int i = childrenCount - 1; i >= 0; i--)
{
android.view.View child = children[i];
if (!canViewReceivePointerEvents(child) || !isTransformedTouchPointInView(x, y, child
, null))
{
continue;
}
// Obtain a hover target for this child. Dequeue it from the
// old hover target list if the child was previously hovered.
android.view.ViewGroup.HoverTarget hoverTarget = firstOldHoverTarget;
bool wasHovered;
{
for (android.view.ViewGroup.HoverTarget predecessor = null; ; )
{
if (hoverTarget == null)
{
hoverTarget = android.view.ViewGroup.HoverTarget.obtain(child);
wasHovered = false;
break;
}
if (hoverTarget.child == child)
{
if (predecessor != null)
{
predecessor.next = hoverTarget.next;
}
else
{
firstOldHoverTarget = hoverTarget.next;
}
hoverTarget.next = null;
wasHovered = true;
break;
}
predecessor = hoverTarget;
hoverTarget = hoverTarget.next;
}
}
// Enqueue the hover target onto the new hover target list.
if (lastHoverTarget != null)
{
lastHoverTarget.next = hoverTarget;
}
else
{
lastHoverTarget = hoverTarget;
mFirstHoverTarget = hoverTarget;
}
// Dispatch the event to the child.
if (action == android.view.MotionEvent.ACTION_HOVER_ENTER)
{
if (!wasHovered)
{
// Send the enter as is.
handled |= dispatchTransformedGenericPointerEvent(@event, child);
}
}
else
{
// enter
if (action == android.view.MotionEvent.ACTION_HOVER_MOVE)
{
if (!wasHovered)
{
// Synthesize an enter from a move.
eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
eventNoHistory.setAction(android.view.MotionEvent.ACTION_HOVER_ENTER);
handled |= dispatchTransformedGenericPointerEvent(eventNoHistory, child);
// enter
eventNoHistory.setAction(action);
handled |= dispatchTransformedGenericPointerEvent(eventNoHistory, child);
}
else
{
// move
// Send the move as is.
handled |= dispatchTransformedGenericPointerEvent(@event, child);
}
}
}
if (handled)
{
break;
}
}
}
}
}
// Send exit events to all previously hovered children that are no longer hovered.
while (firstOldHoverTarget != null)
{
android.view.View child = firstOldHoverTarget.child;
// Exit the old hovered child.
if (action == android.view.MotionEvent.ACTION_HOVER_EXIT)
{
// Send the exit as is.
handled |= dispatchTransformedGenericPointerEvent(@event, child);
}
else
{
// exit
// Synthesize an exit from a move or enter.
// Ignore the result because hover focus has moved to a different view.
if (action == android.view.MotionEvent.ACTION_HOVER_MOVE)
{
dispatchTransformedGenericPointerEvent(@event, child);
}
// move
eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
eventNoHistory.setAction(android.view.MotionEvent.ACTION_HOVER_EXIT);
dispatchTransformedGenericPointerEvent(eventNoHistory, child);
// exit
eventNoHistory.setAction(action);
}
android.view.ViewGroup.HoverTarget nextOldHoverTarget = firstOldHoverTarget.next;
firstOldHoverTarget.recycle();
firstOldHoverTarget = nextOldHoverTarget;
}
// Send events to the view group itself if no children have handled it.
bool newHoveredSelf = !handled;
if (newHoveredSelf == mHoveredSelf)
{
if (newHoveredSelf)
{
// Send event to the view group as before.
handled |= base.dispatchHoverEvent(@event);
}
}
else
{
if (mHoveredSelf)
{
// Exit the view group.
if (action == android.view.MotionEvent.ACTION_HOVER_EXIT)
{
// Send the exit as is.
handled |= base.dispatchHoverEvent(@event);
}
else
{
// exit
// Synthesize an exit from a move or enter.
// Ignore the result because hover focus is moving to a different view.
if (action == android.view.MotionEvent.ACTION_HOVER_MOVE)
{
base.dispatchHoverEvent(@event);
}
// move
eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
eventNoHistory.setAction(android.view.MotionEvent.ACTION_HOVER_EXIT);
base.dispatchHoverEvent(eventNoHistory);
// exit
eventNoHistory.setAction(action);
}
mHoveredSelf = false;
}
if (newHoveredSelf)
{
// Enter the view group.
if (action == android.view.MotionEvent.ACTION_HOVER_ENTER)
{
// Send the enter as is.
handled |= base.dispatchHoverEvent(@event);
// enter
mHoveredSelf = true;
}
else
{
if (action == android.view.MotionEvent.ACTION_HOVER_MOVE)
{
// Synthesize an enter from a move.
eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
eventNoHistory.setAction(android.view.MotionEvent.ACTION_HOVER_ENTER);
handled |= base.dispatchHoverEvent(eventNoHistory);
// enter
eventNoHistory.setAction(action);
handled |= base.dispatchHoverEvent(eventNoHistory);
// move
mHoveredSelf = true;
}
}
}
}
// Recycle the copy of the event that we made.
if (eventNoHistory != @event)
{
eventNoHistory.recycle();
}
// Done.
return handled;
}
/// <summary>
/// Will forward touch events to the delegate view if the event is within the bounds
/// specified in the constructor.
/// </summary>
/// <remarks>
/// Will forward touch events to the delegate view if the event is within the bounds
/// specified in the constructor.
/// </remarks>
/// <param name="event">The touch event to forward</param>
/// <returns>True if the event was forwarded to the delegate, false otherwise.</returns>
public virtual bool onTouchEvent(android.view.MotionEvent @event)
{
int x = (int)@event.getX();
int y = (int)@event.getY();
bool sendToDelegate = false;
bool hit = true;
bool handled = false;
switch (@event.getAction())
{
case android.view.MotionEvent.ACTION_DOWN:
{
android.graphics.Rect bounds = mBounds;
if (bounds.contains(x, y))
{
mDelegateTargeted = true;
sendToDelegate = true;
}
break;
}
case android.view.MotionEvent.ACTION_UP:
case android.view.MotionEvent.ACTION_MOVE:
{
sendToDelegate = mDelegateTargeted;
if (sendToDelegate)
{
android.graphics.Rect slopBounds = mSlopBounds;
if (!slopBounds.contains(x, y))
{
hit = false;
}
}
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
{
sendToDelegate = mDelegateTargeted;
mDelegateTargeted = false;
break;
}
}
if (sendToDelegate)
{
android.view.View delegateView = mDelegateView;
if (hit)
{
// Offset event coordinates to be inside the target view
@event.setLocation(delegateView.getWidth() / 2, delegateView.getHeight() / 2);
}
else
{
// Offset event coordinates to be outside the target view (in case it does
// something like tracking pressed state)
int slop = mSlop;
@event.setLocation(-(slop * 2), -(slop * 2));
}
handled = delegateView.dispatchTouchEvent(@event);
}
return handled;
}
public override bool dispatchTouchEvent(android.view.MotionEvent ev)
{
if (mInputEventConsistencyVerifier != null)
{
mInputEventConsistencyVerifier.onTouchEvent(ev, 1);
}
bool handled = false;
if (onFilterTouchEventForSecurity(ev))
{
int action = ev.getAction();
int actionMasked = action & android.view.MotionEvent.ACTION_MASK;
// Handle an initial down.
if (actionMasked == android.view.MotionEvent.ACTION_DOWN)
{
// Throw away all previous state when starting a new touch gesture.
// The framework may have dropped the up or cancel event for the previous gesture
// due to an app switch, ANR, or some other state change.
cancelAndClearTouchTargets(ev);
resetTouchState();
}
// Check for interception.
bool intercepted;
if (actionMasked == android.view.MotionEvent.ACTION_DOWN || mFirstTouchTarget !=
null)
{
bool disallowIntercept = (mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0;
if (!disallowIntercept)
{
intercepted = onInterceptTouchEvent(ev);
ev.setAction(action);
}
else
{
// restore action in case it was changed
intercepted = false;
}
}
else
{
// There are no touch targets and this action is not an initial down
// so this view group continues to intercept touches.
intercepted = true;
}
// Check for cancelation.
bool canceled = resetCancelNextUpFlag(this) || actionMasked == android.view.MotionEvent
.ACTION_CANCEL;
// Update list of touch targets for pointer down, if needed.
bool split = (mGroupFlags & FLAG_SPLIT_MOTION_EVENTS) != 0;
android.view.ViewGroup.TouchTarget newTouchTarget = null;
bool alreadyDispatchedToNewTouchTarget = false;
if (!canceled && !intercepted)
{
if (actionMasked == android.view.MotionEvent.ACTION_DOWN || (split && actionMasked
== android.view.MotionEvent.ACTION_POINTER_DOWN) || actionMasked == android.view.MotionEvent
.ACTION_HOVER_MOVE)
{
int actionIndex = ev.getActionIndex();
// always 0 for down
int idBitsToAssign = split ? 1 << ev.getPointerId(actionIndex) : android.view.ViewGroup
.TouchTarget.ALL_POINTER_IDS;
// Clean up earlier touch targets for this pointer id in case they
// have become out of sync.
removePointersFromTouchTargets(idBitsToAssign);
int childrenCount = mChildrenCount;
if (childrenCount != 0)
{
// Find a child that can receive the event.
// Scan children from front to back.
android.view.View[] children = mChildren;
float x = ev.getX(actionIndex);
float y = ev.getY(actionIndex);
{
for (int i = childrenCount - 1; i >= 0; i--)
{
android.view.View child = children[i];
if (!canViewReceivePointerEvents(child) || !isTransformedTouchPointInView(x, y, child
, null))
{
continue;
}
newTouchTarget = getTouchTarget(child);
if (newTouchTarget != null)
{
// Child is already receiving touch within its bounds.
// Give it the new pointer in addition to the ones it is handling.
newTouchTarget.pointerIdBits |= idBitsToAssign;
break;
}
resetCancelNextUpFlag(child);
if (dispatchTransformedTouchEvent(ev, false, child, idBitsToAssign))
{
// Child wants to receive touch within its bounds.
mLastTouchDownTime = ev.getDownTime();
mLastTouchDownIndex = i;
mLastTouchDownX = ev.getX();
mLastTouchDownY = ev.getY();
newTouchTarget = addTouchTarget(child, idBitsToAssign);
alreadyDispatchedToNewTouchTarget = true;
break;
}
}
}
}
if (newTouchTarget == null && mFirstTouchTarget != null)
{
// Did not find a child to receive the event.
// Assign the pointer to the least recently added target.
newTouchTarget = mFirstTouchTarget;
while (newTouchTarget.next != null)
{
newTouchTarget = newTouchTarget.next;
}
newTouchTarget.pointerIdBits |= idBitsToAssign;
}
}
}
// Dispatch to touch targets.
if (mFirstTouchTarget == null)
{
// No touch targets so treat this as an ordinary view.
handled = dispatchTransformedTouchEvent(ev, canceled, null, android.view.ViewGroup
.TouchTarget.ALL_POINTER_IDS);
}
else
{
// Dispatch to touch targets, excluding the new touch target if we already
// dispatched to it. Cancel touch targets if necessary.
android.view.ViewGroup.TouchTarget predecessor = null;
android.view.ViewGroup.TouchTarget target = mFirstTouchTarget;
while (target != null)
{
android.view.ViewGroup.TouchTarget next = target.next;
if (alreadyDispatchedToNewTouchTarget && target == newTouchTarget)
{
handled = true;
}
else
{
bool cancelChild = resetCancelNextUpFlag(target.child) || intercepted;
if (dispatchTransformedTouchEvent(ev, cancelChild, target.child, target.pointerIdBits
))
{
handled = true;
}
if (cancelChild)
{
if (predecessor == null)
{
mFirstTouchTarget = next;
}
else
{
predecessor.next = next;
}
target.recycle();
target = next;
continue;
}
}
predecessor = target;
target = next;
}
}
// Update list of touch targets for pointer up or cancel, if needed.
if (canceled || actionMasked == android.view.MotionEvent.ACTION_UP || actionMasked
== android.view.MotionEvent.ACTION_HOVER_MOVE)
{
resetTouchState();
}
else
{
if (split && actionMasked == android.view.MotionEvent.ACTION_POINTER_UP)
{
int actionIndex = ev.getActionIndex();
int idBitsToRemove = 1 << ev.getPointerId(actionIndex);
removePointersFromTouchTargets(idBitsToRemove);
}
}
}
if (!handled && mInputEventConsistencyVerifier != null)
{
mInputEventConsistencyVerifier.onUnhandledEvent(ev, 1);
}
return handled;
}
public override bool onInterceptTouchEvent(android.view.MotionEvent ev)
{
int action = ev.getAction();
if ((action == android.view.MotionEvent.ACTION_MOVE) && (mIsBeingDragged))
{
return true;
}
switch (action & android.view.MotionEvent.ACTION_MASK)
{
case android.view.MotionEvent.ACTION_MOVE:
{
int activePointerId = mActivePointerId;
if (activePointerId == INVALID_POINTER)
{
// If we don't have a valid id, the touch down wasn't on content.
break;
}
int pointerIndex = ev.findPointerIndex(activePointerId);
float x = ev.getX(pointerIndex);
int xDiff = (int)System.Math.Abs(x - mLastMotionX);
if (xDiff > mTouchSlop)
{
mIsBeingDragged = true;
mLastMotionX = x;
initVelocityTrackerIfNotExists();
mVelocityTracker.addMovement(ev);
if (mParent != null)
{
mParent.requestDisallowInterceptTouchEvent(true);
}
}
break;
}
case android.view.MotionEvent.ACTION_DOWN:
{
float x = ev.getX();
if (!inChild((int)x, (int)ev.getY()))
{
mIsBeingDragged = false;
recycleVelocityTracker();
break;
}
mLastMotionX = x;
mActivePointerId = ev.getPointerId(0);
initOrResetVelocityTracker();
mVelocityTracker.addMovement(ev);
mIsBeingDragged = !mScroller.isFinished();
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
case android.view.MotionEvent.ACTION_UP:
{
mIsBeingDragged = false;
mActivePointerId = INVALID_POINTER;
if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0))
{
invalidate();
}
break;
}
case android.view.MotionEvent.ACTION_POINTER_DOWN:
{
int index = ev.getActionIndex();
mLastMotionX = ev.getX(index);
mActivePointerId = ev.getPointerId(index);
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
onSecondaryPointerUp(ev);
mLastMotionX = ev.getX(ev.findPointerIndex(mActivePointerId));
break;
}
}
return mIsBeingDragged;
}
public override bool onTouchEvent(android.view.MotionEvent @event)
{
int x = (int)@event.getX();
int y = (int)@event.getY();
if ((@event.getAction() == android.view.MotionEvent.ACTION_DOWN) && ((x < 0) || (
x >= this.getWidth()) || (y < 0) || (y >= this.getHeight())))
{
this._enclosing.dismiss();
return true;
}
else
{
if (@event.getAction() == android.view.MotionEvent.ACTION_OUTSIDE)
{
this._enclosing.dismiss();
return true;
}
else
{
return base.onTouchEvent(@event);
}
}
}
public override bool onTouchEvent(android.view.MotionEvent ev)
{
initVelocityTrackerIfNotExists();
mVelocityTracker.addMovement(ev);
int action = ev.getAction();
switch (action & android.view.MotionEvent.ACTION_MASK)
{
case android.view.MotionEvent.ACTION_DOWN:
{
mIsBeingDragged = getChildCount() != 0;
if (!mIsBeingDragged)
{
return false;
}
if (!mScroller.isFinished())
{
mScroller.abortAnimation();
}
// Remember where the motion event started
mLastMotionX = ev.getX();
mActivePointerId = ev.getPointerId(0);
break;
}
case android.view.MotionEvent.ACTION_MOVE:
{
if (mIsBeingDragged)
{
// Scroll to follow the motion event
int activePointerIndex = ev.findPointerIndex(mActivePointerId);
float x = ev.getX(activePointerIndex);
int deltaX = (int)(mLastMotionX - x);
mLastMotionX = x;
int oldX = mScrollX;
int oldY = mScrollY;
int range = getScrollRange();
int overscrollMode = getOverScrollMode();
bool canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS
&& range > 0);
if (overScrollBy(deltaX, 0, mScrollX, 0, range, 0, mOverscrollDistance, 0, true))
{
// Break our velocity if we hit a scroll barrier.
mVelocityTracker.clear();
}
onScrollChanged(mScrollX, mScrollY, oldX, oldY);
if (canOverscroll)
{
int pulledToX = oldX + deltaX;
if (pulledToX < 0)
{
mEdgeGlowLeft.onPull((float)deltaX / getWidth());
if (!mEdgeGlowRight.isFinished())
{
mEdgeGlowRight.onRelease();
}
}
else
{
if (pulledToX > range)
{
mEdgeGlowRight.onPull((float)deltaX / getWidth());
if (!mEdgeGlowLeft.isFinished())
{
mEdgeGlowLeft.onRelease();
}
}
}
if (mEdgeGlowLeft != null && (!mEdgeGlowLeft.isFinished() || !mEdgeGlowRight.isFinished
()))
{
invalidate();
}
}
}
break;
}
case android.view.MotionEvent.ACTION_UP:
{
if (mIsBeingDragged)
{
android.view.VelocityTracker velocityTracker = mVelocityTracker;
velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
int initialVelocity = (int)velocityTracker.getXVelocity(mActivePointerId);
if (getChildCount() > 0)
{
if ((System.Math.Abs(initialVelocity) > mMinimumVelocity))
{
fling(-initialVelocity);
}
else
{
if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0))
{
invalidate();
}
}
}
mActivePointerId = INVALID_POINTER;
mIsBeingDragged = false;
recycleVelocityTracker();
if (mEdgeGlowLeft != null)
{
mEdgeGlowLeft.onRelease();
mEdgeGlowRight.onRelease();
}
}
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
{
if (mIsBeingDragged && getChildCount() > 0)
{
if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0))
{
invalidate();
}
mActivePointerId = INVALID_POINTER;
mIsBeingDragged = false;
recycleVelocityTracker();
if (mEdgeGlowLeft != null)
{
mEdgeGlowLeft.onRelease();
mEdgeGlowRight.onRelease();
}
}
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
onSecondaryPointerUp(ev);
break;
}
}
return true;
}
private void trackTouchEvent(android.view.MotionEvent @event)
{
int width = getWidth();
int available = width - mPaddingLeft - mPaddingRight;
int x = (int)@event.getX();
float scale;
float progress = 0;
if (x < mPaddingLeft)
{
scale = 0.0f;
}
else
{
if (x > width - mPaddingRight)
{
scale = 1.0f;
}
else
{
scale = (float)(x - mPaddingLeft) / (float)available;
progress = mTouchProgressOffset;
}
}
int max = getMax();
progress += scale * max;
setProgress((int)progress, true);
}
/// <summary>
/// Analyzes the given motion event and if applicable triggers the
/// appropriate callbacks on the
/// <see cref="OnGestureListener">OnGestureListener</see>
/// supplied.
/// </summary>
/// <param name="ev">The current motion event.</param>
/// <returns>
/// true if the
/// <see cref="OnGestureListener">OnGestureListener</see>
/// consumed the event,
/// else false.
/// </returns>
public virtual bool onTouchEvent(android.view.MotionEvent ev)
{
if (mInputEventConsistencyVerifier != null)
{
mInputEventConsistencyVerifier.onTouchEvent(ev, 0);
}
int action = ev.getAction();
float y = ev.getY();
float x = ev.getX();
if (mVelocityTracker == null)
{
mVelocityTracker = android.view.VelocityTracker.obtain();
}
mVelocityTracker.addMovement(ev);
bool handled = false;
switch (action & android.view.MotionEvent.ACTION_MASK)
{
case android.view.MotionEvent.ACTION_POINTER_DOWN:
{
if (mIgnoreMultitouch)
{
// Multitouch event - abort.
cancel();
}
break;
}
case android.view.MotionEvent.ACTION_POINTER_UP:
{
// Ending a multitouch gesture and going back to 1 finger
if (mIgnoreMultitouch && ev.getPointerCount() == 2)
{
int index = (((action & android.view.MotionEvent.ACTION_POINTER_INDEX_MASK) >> android.view.MotionEvent
.ACTION_POINTER_INDEX_SHIFT) == 0) ? 1 : 0;
mLastMotionX = ev.getX(index);
mLastMotionY = ev.getY(index);
mVelocityTracker.recycle();
mVelocityTracker = android.view.VelocityTracker.obtain();
}
break;
}
case android.view.MotionEvent.ACTION_DOWN:
{
if (mDoubleTapListener != null)
{
bool hadTapMessage = mHandler.hasMessages(TAP);
if (hadTapMessage)
{
mHandler.removeMessages(TAP);
}
if ((mCurrentDownEvent != null) && (mPreviousUpEvent != null) && hadTapMessage &&
isConsideredDoubleTap(mCurrentDownEvent, mPreviousUpEvent, ev))
{
// This is a second tap
mIsDoubleTapping = true;
// Give a callback with the first tap of the double-tap
handled |= mDoubleTapListener.onDoubleTap(mCurrentDownEvent);
// Give a callback with down event of the double-tap
handled |= mDoubleTapListener.onDoubleTapEvent(ev);
}
else
{
// This is a first tap
mHandler.sendEmptyMessageDelayed(TAP, DOUBLE_TAP_TIMEOUT);
}
}
mLastMotionX = x;
mLastMotionY = y;
if (mCurrentDownEvent != null)
{
mCurrentDownEvent.recycle();
}
mCurrentDownEvent = android.view.MotionEvent.obtain(ev);
mAlwaysInTapRegion = true;
mAlwaysInBiggerTapRegion = true;
mStillDown = true;
mInLongPress = false;
if (mIsLongpressEnabled)
{
mHandler.removeMessages(LONG_PRESS);
mHandler.sendEmptyMessageAtTime(LONG_PRESS, mCurrentDownEvent.getDownTime() + TAP_TIMEOUT
+ LONGPRESS_TIMEOUT);
}
mHandler.sendEmptyMessageAtTime(SHOW_PRESS, mCurrentDownEvent.getDownTime() + TAP_TIMEOUT
);
handled |= mListener.onDown(ev);
break;
}
case android.view.MotionEvent.ACTION_MOVE:
{
if (mInLongPress || (mIgnoreMultitouch && ev.getPointerCount() > 1))
{
break;
}
float scrollX = mLastMotionX - x;
float scrollY = mLastMotionY - y;
if (mIsDoubleTapping)
{
// Give the move events of the double-tap
handled |= mDoubleTapListener.onDoubleTapEvent(ev);
}
else
{
if (mAlwaysInTapRegion)
{
int deltaX = (int)(x - mCurrentDownEvent.getX());
int deltaY = (int)(y - mCurrentDownEvent.getY());
int distance = (deltaX * deltaX) + (deltaY * deltaY);
if (distance > mTouchSlopSquare)
{
handled = mListener.onScroll(mCurrentDownEvent, ev, scrollX, scrollY);
mLastMotionX = x;
mLastMotionY = y;
mAlwaysInTapRegion = false;
mHandler.removeMessages(TAP);
mHandler.removeMessages(SHOW_PRESS);
mHandler.removeMessages(LONG_PRESS);
}
if (distance > mBiggerTouchSlopSquare)
{
mAlwaysInBiggerTapRegion = false;
}
}
else
{
if ((System.Math.Abs(scrollX) >= 1) || (System.Math.Abs(scrollY) >= 1))
{
handled = mListener.onScroll(mCurrentDownEvent, ev, scrollX, scrollY);
mLastMotionX = x;
mLastMotionY = y;
}
}
}
break;
}
case android.view.MotionEvent.ACTION_UP:
{
mStillDown = false;
android.view.MotionEvent currentUpEvent = android.view.MotionEvent.obtain(ev);
if (mIsDoubleTapping)
{
// Finally, give the up event of the double-tap
handled |= mDoubleTapListener.onDoubleTapEvent(ev);
}
else
{
if (mInLongPress)
{
mHandler.removeMessages(TAP);
mInLongPress = false;
}
else
{
if (mAlwaysInTapRegion)
{
handled = mListener.onSingleTapUp(ev);
}
else
{
// A fling must travel the minimum tap distance
android.view.VelocityTracker velocityTracker = mVelocityTracker;
velocityTracker.computeCurrentVelocity(1000, mMaximumFlingVelocity);
float velocityY = velocityTracker.getYVelocity();
float velocityX = velocityTracker.getXVelocity();
if ((System.Math.Abs(velocityY) > mMinimumFlingVelocity) || (System.Math.Abs(velocityX
) > mMinimumFlingVelocity))
{
handled = mListener.onFling(mCurrentDownEvent, ev, velocityX, velocityY);
}
}
}
}
if (mPreviousUpEvent != null)
{
mPreviousUpEvent.recycle();
}
// Hold the event we obtained above - listeners may have changed the original.
mPreviousUpEvent = currentUpEvent;
mVelocityTracker.recycle();
mVelocityTracker = null;
mIsDoubleTapping = false;
mHandler.removeMessages(SHOW_PRESS);
mHandler.removeMessages(LONG_PRESS);
break;
}
case android.view.MotionEvent.ACTION_CANCEL:
{
cancel();
break;
}
}
if (!handled && mInputEventConsistencyVerifier != null)
{
mInputEventConsistencyVerifier.onUnhandledEvent(ev, 0);
}
return handled;
}