/**
* Fling the scroll view
*
* @param velocityY The initial velocity in the Y direction. Positive
* numbers mean that the finger/curor is moving down the screen,
* which means we want to scroll towards the top.
*/
public void Fling(int velocityX, int velocityY)
{
if (ChildCount > 0)
{
int height = Height - PaddingBottom - PaddingTop;
int bottom = GetChildAt(0).Height;
int width = Width - PaddingRight - PaddingLeft;
int right = GetChildAt(0).Width;
mScroller.Fling(ScrollX, ScrollY, velocityX, velocityY, 0, right - width, 0, bottom - height);
bool movingDown = velocityY > 0;
bool movingRight = velocityX > 0;
View newFocused = findFocusableViewInMyBounds(movingRight, mScroller.FinalX, movingDown, mScroller.FinalY, FindFocus());
if (newFocused == null)
{
newFocused = this;
}
if (newFocused != FindFocus() && newFocused.RequestFocus(movingDown ? FocusSearchDirection.Down : FocusSearchDirection.Up))
{
mTwoDScrollViewMovedFocus = true;
mTwoDScrollViewMovedFocus = false;
}
AwakenScrollBars(mScroller.Duration);
Invalidate();
}
}
public bool OnFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
{
var x = e2.GetX();
var y = e2.GetY();
Scroller.Fling((int)x, (int)y, (int)velocityX / 4, (int)velocityY / 4, 0, Width * 5, 0, Height * 5);
Device.StartTimer(new TimeSpan(1), () => {
if (Scroller.ComputeScrollOffset())
{
var xx = Scroller.CurrX;
var yy = Scroller.CurrY;
Element.ViewPoint = Element.ViewPoint.Offset(-(xx - x) / Element.ViewScale, -(yy - y) / Element.ViewScale);
DrawImage = Element.DrawImmageRequest(Element.ViewPoint, Matrix2.Enlargement(ViewSize, 1 / Element.ViewScale, 1 / Element.ViewScale));
Invalidate();
}
return(!Scroller.IsFinished);
});
return(true);
}
public Fling(TouchImageView view, int velocityX, int velocityY)
{
this.view = view;
view.SetState(TouchState.FLING);
scroller = new Scroller(view.context);
view.matrix.GetValues(view.m);
int startX = (int)view.m[Matrix.MtransX];
int startY = (int)view.m[Matrix.MtransY];
int minX, maxX, minY, maxY;
if (view.GetImageWidth() > view.viewWidth)
{
minX = view.viewWidth - (int)view.GetImageWidth();
maxX = 0;
}
else
{
minX = maxX = startX;
}
if (view.GetImageHeight() > view.viewHeight)
{
minY = view.viewHeight - (int)view.GetImageHeight();
maxY = 0;
}
else
{
minY = maxY = startY;
}
scroller.Fling(startX, startY, (int)velocityX, (int)velocityY, minX, maxX, minY, maxY);
currX = startX;
currY = startY;
}
protected bool OnFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
{
lock (this)
{
Scroller.Fling(_nextX, 0, (int)-velocityX, 0, 0, _maxX, 0, 0);
}
RequestLayout();
return(true);
}
public void Fling(int startX, int startY, int velocityX, int velocityY, int minX, int maxX, int minY, int maxY)
{
if (isPreGingerbread)
{
scroller.Fling(startX, startY, velocityX, velocityY, minX, maxX, minY, maxY);
}
else
{
overScroller.Fling(startX, startY, velocityX, velocityY, minX, maxX, minY, maxY);
}
}
public Fling(ScaleImageView view, int velocityX, int velocityY)
{
try
{
_view = view;
view.SetState(TouchState.Fling);
_scroller = new Scroller(view._context);
view._matrix.GetValues(view._m);
var startX = (int)view._m[Matrix.MtransX];
var startY = (int)view._m[Matrix.MtransY];
int minX, maxX, minY, maxY;
if (view.GetImageWidth() > view.ViewWidth)
{
minX = view.ViewWidth - (int)view.GetImageWidth();
maxX = 0;
}
else
{
minX = maxX = startX;
}
if (view.GetImageHeight() > view.ViewHeight)
{
minY = view.ViewHeight - (int)view.GetImageHeight();
maxY = 0;
}
else
{
minY = maxY = startY;
}
_scroller.Fling(startX, startY, velocityX, velocityY, minX, maxX, minY, maxY);
_currX = startX;
_currY = startY;
}
catch
{
//todo nothing
}
}
public override void Fling(int startX, int startY, int velocityX, int velocityY, int minX, int maxX, int minY, int maxY, int overX, int overY)
{
mScroller.Fling(startX, startY, velocityX, velocityY, minX, maxX, minY, maxY);
}