public bool OnSingleTapConfirmed(Android.Views.MotionEvent e)
{
if (this.photoViewAttacher == null)
return false;
ImageView imageView = photoViewAttacher.GetImageView();
if (null != photoViewAttacher.GetOnPhotoTapListener ()) {
RectF displayRect = photoViewAttacher.GetDisplayRect();
if (null != displayRect) {
float x = e.GetX(), y = e.GetY();
if (displayRect.Contains(x, y)) {
float xResult = (x - displayRect.Left)
/ displayRect.Width();
float yResult = (y - displayRect.Top)
/ displayRect.Height();
photoViewAttacher.GetOnPhotoTapListener().OnPhotoTap(imageView, xResult, yResult);
return true;
}
}
}
if (null != photoViewAttacher.GetOnViewTapListener()) {
photoViewAttacher.GetOnViewTapListener().OnViewTap(imageView, e.GetX(), e.GetY());
}
return false;
}
public bool OnDoubleTap(Android.Views.MotionEvent ev)
{
if (photoViewAttacher == null)
return false;
try {
float scale = photoViewAttacher.GetScale();
float x = ev.GetX();
float y = ev.GetY();
if (scale > photoViewAttacher.GetMinimumScale())
{
photoViewAttacher.SetScale(photoViewAttacher.GetMinimumScale(), x, y, true);
}
else
{
photoViewAttacher.SetScale(photoViewAttacher.GetMediumScale(), x, y, true);
}
/*
if (scale < photoViewAttacher.GetMediumScale()) {
photoViewAttacher.SetScale(photoViewAttacher.GetMediumScale(), x, y, true);
} else if (scale >= photoViewAttacher.GetMediumScale() && scale < photoViewAttacher.GetMaximumScale()) {
photoViewAttacher.SetScale(photoViewAttacher.GetMaximumScale(), x, y, true);
} else {
photoViewAttacher.SetScale(photoViewAttacher.GetMinimumScale(), x, y, true);
}*/
} catch (Java.Lang.ArrayIndexOutOfBoundsException e) {
// Can sometimes happen when getX() and getY() is called
}
return true;
}
public override bool OnTouchEvent (Android.Views.MotionEvent e)
{
var touchX = e.GetX();
var touchY = e.GetY();
switch (e.Action)
{
case MotionEventActions.Down:
drawPath.MoveTo(touchX, touchY);
break;
case MotionEventActions.Move:
drawPath.LineTo(touchX, touchY);
break;
default:
return false;
}
Invalidate();
return true;
}
public override bool OnTouchEvent(Android.Views.MotionEvent ev)
{
if (base.OnTouchEvent(ev))
{
return true;
}
if ((mViewPager == null) || (mViewPager.Adapter.Count == 0))
{
return false;
}
MotionEventActions action = ev.Action & MotionEventActions.Mask;
switch (action)
{
case MotionEventActions.Down:
mActivePointerId = MotionEventCompat.GetPointerId(ev, 0);
mLastMotionX = ev.GetX();
break;
case MotionEventActions.Move:
{
int activePointerIndex = MotionEventCompat.FindPointerIndex(ev, mActivePointerId);
float x = MotionEventCompat.GetX(ev, activePointerIndex);
float deltaX = x - mLastMotionX;
if (!mIsDragging)
{
if (Math.Abs(deltaX) > mTouchSlop)
{
mIsDragging = true;
}
}
if (mIsDragging)
{
mLastMotionX = x;
if (mViewPager.IsFakeDragging || mViewPager.BeginFakeDrag())
{
mViewPager.FakeDragBy(deltaX);
}
}
break;
}
case MotionEventActions.Cancel:
case MotionEventActions.Up:
if (!mIsDragging)
{
int count = mViewPager.Adapter.Count;
int width = Width;
float halfWidth = width / 2f;
float sixthWidth = width / 6f;
if ((mCurrentPage > 0) && (ev.GetX() < halfWidth - sixthWidth))
{
if (action != MotionEventActions.Cancel)
{
mViewPager.SetCurrentItem(mCurrentPage - 1, true);
}
return true;
}
else if ((mCurrentPage < count - 1) && (ev.GetX() > halfWidth + sixthWidth))
{
if (action != MotionEventActions.Cancel)
{
mViewPager.SetCurrentItem(mCurrentPage + 1, true);
}
return true;
}
}
mIsDragging = false;
mActivePointerId = INVALID_POINTER;
if (mViewPager.IsFakeDragging) mViewPager.EndFakeDrag();
break;
case MotionEventActions.PointerDown:
{
int index = MotionEventCompat.GetActionIndex(ev);
mLastMotionX = MotionEventCompat.GetX(ev, index);
mActivePointerId = MotionEventCompat.GetPointerId(ev, index);
break;
}
case MotionEventActions.PointerUp:
int pointerIndex = MotionEventCompat.GetActionIndex(ev);
int pointerId = MotionEventCompat.GetPointerId(ev, pointerIndex);
if (pointerId == mActivePointerId)
{
int newPointerIndex = pointerIndex == 0 ? 1 : 0;
mActivePointerId = MotionEventCompat.GetPointerId(ev, newPointerIndex);
}
mLastMotionX = MotionEventCompat.GetX(ev, MotionEventCompat.FindPointerIndex(ev, mActivePointerId));
break;
}
return true;
}
public override bool OnInterceptTouchEvent (Android.Views.MotionEvent ev)
{
//
switch (ev.Action) {
case MotionEventActions.Down:
deltaX = 0;
deltaY = 0;
lastX = ev.GetX ();
lastY = ev.GetY ();
return false;
break;
case MotionEventActions.Move:
float moveX = ev.GetX ();
float moveY = ev.GetY ();
deltaX += Math.Abs (moveX - lastX);
deltaY += Math.Abs (moveY - lastY);
lastX = moveX;
lastY = moveY;
if (deltaX > deltaY) {
return false;
}
break;
case MotionEventActions.Up:
if (deltaX > deltaY) {
return false;
}
break;
}
var test = base.OnInterceptTouchEvent (ev);
return test;
// if (x1 == 0)
// x1 = ev.GetX ();
//
// if (ev.Action == Android.Views.MotionEventActions.Move) {
// Console.WriteLine ("x1 = {0}, x2 = {1}", x1, ev.GetX ());
// x2 = ev.GetX ();
// counter = counter + Math.Abs (x2 - x1);
// Console.WriteLine ("New Counter Value = {0}", counter);
// x1 = x2;
// }
//
// if (counter > 100 && ev.Action == Android.Views.MotionEventActions.Up) {
// Console.WriteLine (ev.Action);
// Console.WriteLine ("Reset Counter and Return True");
// counter = 0;
// }
//
// Console.WriteLine (ev.Action);
// Console.WriteLine ("Get X: {0}", ev.GetX());
//
// if (counter == 0) {
// return true;
// } else {
// return base.OnInterceptTouchEvent (ev);
// }
}
public bool OnTouch( Android.Views.View v, Android.Views.MotionEvent e )
{
Android.Views.MotionEventActions action = e.Action;
if ( ( action & Android.Views.MotionEventActions.Mask ) != Android.Views.MotionEventActions.Move )
{
TouchPointer tec = new TouchPointer ();
switch ( action & Android.Views.MotionEventActions.Mask )
{
case Android.Views.MotionEventActions.Down:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( 0 ) ), new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Pressed );
break;
case Android.Views.MotionEventActions.PointerDown:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( ( int ) ( action & Android.Views.MotionEventActions.PointerIdMask ) >> ( int ) Android.Views.MotionEventActions.PointerIdShift ) ),
new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Pressed );
break;
case Android.Views.MotionEventActions.Up:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( 0 ) ), new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Released );
break;
case Android.Views.MotionEventActions.PointerUp:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( ( int ) ( action & Android.Views.MotionEventActions.PointerIdMask ) >> ( int ) Android.Views.MotionEventActions.PointerIdShift ) ),
new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Released );
break;
}
bool isChanged = false;
for ( int i = 0; i < touchPointers.Count; i++ )
{
if ( touchPointers [ i ].Id == tec.Id )
{
touchPointers [ i ] = tec;
isChanged = true;
break;
}
}
if ( !isChanged )
touchPointers.Add ( tec );
}
else if ( ( action & Android.Views.MotionEventActions.Mask ) == Android.Views.MotionEventActions.Move )
{
for ( int i = 0; i < e.PointerCount; i++ )
{
TouchPointer tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( i ) ), new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Moved );
touchPointers [ i ] = tec;
}
}
return true;
}
