public override void OnTouchMove(TouchMoveEvent touchEventArgs)
{
base.OnTouchMove(touchEventArgs);
if (!touchEventArgs.IsPrimaryContact)
{
return;
}
if (_lastTouchEvent != null)
{
// Transform screen (i.e. 720p) to skin coordinates (i.e. 1080p)
float lastX = _lastTouchEvent.LocationX;
float lastY = _lastTouchEvent.LocationY;
float currX = touchEventArgs.LocationX;
float currY = touchEventArgs.LocationY;
if (!TransformMouseCoordinates(ref lastX, ref lastY) || !TransformMouseCoordinates(ref currX, ref currY))
{
return;
}
var scrollX = currX - lastX;
var scrollY = currY - lastY;
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
if (svfs == null)
{
return;
}
svfs.Scroll(scrollX, scrollY);
}
}
public override void OnMouseWheel(int numDetents)
{
base.OnMouseWheel(numDetents);
if (!IsMouseOver)
{
return;
}
int numLines = numDetents * SystemInformation.MouseWheelScrollLines;
if (numLines < 0)
{
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
if (svfs != null)
{
svfs.ScrollDown(-1 * numLines);
}
}
else if (numLines > 0)
{
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
if (svfs != null)
{
svfs.ScrollUp(numLines);
}
}
}
protected override void OnMouseWheel(MouseWheelEventArgs e)
{
// migration from OnMouseWheel(int numDetents)
// - no need to check if mouse is over
// - no need to call base class
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
if (svfs == null)
{
return;
}
int scrollByLines = SystemInformation.MouseWheelScrollLines; // Use the system setting as default.
IScrollInfo scrollInfo = svfs as IScrollInfo;
if (scrollInfo != null && scrollInfo.NumberOfVisibleLines != 0) // If ScrollControl can shown less items, use this as limit.
{
scrollByLines = scrollInfo.NumberOfVisibleLines;
}
int numLines = e.NumDetents * scrollByLines;
if (numLines < 0)
{
svfs.ScrollDown(-1 * numLines);
}
else if (numLines > 0)
{
svfs.ScrollUp(numLines);
}
}
public override void OnTouchUp(TouchUpEvent touchEventArgs)
{
base.OnTouchUp(touchEventArgs);
if (!touchEventArgs.IsPrimaryContact)
{
return;
}
_lastTouchEvent = null;
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
if (svfs != null)
{
svfs.EndScroll();
}
}
public override void OnTouchDown(TouchDownEvent touchEventArgs)
{
var isInArea = IsInArea(touchEventArgs.LocationX, touchEventArgs.LocationY);
base.OnTouchDown(touchEventArgs);
// Only start handling touch if it happened inside control's area
if (!touchEventArgs.IsPrimaryContact || !isInArea)
{
return;
}
_lastTouchEvent = touchEventArgs;
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
if (svfs != null)
{
svfs.BeginScroll();
}
}
public override void OnMouseWheel(int numDetents)
{
base.OnMouseWheel(numDetents);
if (!IsMouseOver)
{
return;
}
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
if (svfs == null)
{
return;
}
int scrollByLines = SystemInformation.MouseWheelScrollLines; // Use the system setting as default.
IScrollInfo scrollInfo = svfs as IScrollInfo;
if (scrollInfo != null && scrollInfo.NumberOfVisibleLines != 0) // If ScrollControl can shown less items, use this as limit.
{
scrollByLines = scrollInfo.NumberOfVisibleLines;
}
int numLines = numDetents * scrollByLines;
if (numLines < 0)
{
svfs.ScrollDown(-1 * numLines);
}
else if (numLines > 0)
{
svfs.ScrollUp(numLines);
}
}
bool OnUp()
{
IScrollViewerFocusSupport svfs = FindScrollControl() as IScrollViewerFocusSupport;
return(svfs != null && svfs.FocusUp());
}
public bool EndScroll()
{
IScrollViewerFocusSupport svfs = _itemsHostPanel as IScrollViewerFocusSupport;
return(svfs != null && svfs.EndScroll());
}
public bool Scroll(float deltaX, float deltaY)
{
IScrollViewerFocusSupport svfs = _itemsHostPanel as IScrollViewerFocusSupport;
return(svfs != null && svfs.Scroll(deltaX, deltaY));
}
public bool ScrollUp(int numLines)
{
IScrollViewerFocusSupport svfs = _itemsHostPanel as IScrollViewerFocusSupport;
return(svfs != null && svfs.ScrollUp(numLines));
}
public bool FocusPageRight()
{
IScrollViewerFocusSupport svfs = _itemsHostPanel as IScrollViewerFocusSupport;
return(svfs != null && svfs.FocusPageRight());
}
public bool BeginScroll()
{
IScrollViewerFocusSupport svfs = _itemsHostPanel as IScrollViewerFocusSupport;
return svfs != null && svfs.BeginScroll();
}
public bool FocusLeft()
{
IScrollViewerFocusSupport svfs = _itemsHostPanel as IScrollViewerFocusSupport;
return svfs != null && svfs.FocusLeft();
}
