// Request to scroll horizontally and vertically by the specified scrolling amount
void IScrollProvider.Scroll(ScrollAmount HorizontalAmount, ScrollAmount VerticalAmount)
{
// Make sure that the control is enabled
if (!SafeNativeMethods.IsWindowEnabled(_hwnd))
{
throw new ElementNotEnabledException();
}
if (!IsScrollable())
{
throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
}
bool fHorizontal = IsHorizontal(_hwnd);
if ((fHorizontal && VerticalAmount != ScrollAmount.NoAmount) || (!fHorizontal && HorizontalAmount != ScrollAmount.NoAmount))
{
throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
}
// Fake the scroll with pushes on the buttons
// It is risky to do a setpos since the calculation of the amount in pels to scroll
// is dependent on the buttons being visible or not.
switch (fHorizontal ? HorizontalAmount : VerticalAmount)
{
case ScrollAmount.LargeDecrement:
case ScrollAmount.SmallDecrement:
if (IsVisible(_hwnd, NativeMethods.PGB_TOPORLEFT))
{
PagerButton pagerButton = new PagerButton(_hwnd, this, PagerItem.PrevBtn);
((IInvokeProvider)pagerButton).Invoke();
return;
}
throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
case ScrollAmount.LargeIncrement:
case ScrollAmount.SmallIncrement:
if (IsVisible(_hwnd, NativeMethods.PGB_BOTTOMORRIGHT))
{
PagerButton pagerButton = new PagerButton(_hwnd, this, PagerItem.NextBtn);
((IInvokeProvider)pagerButton).Invoke();
return;
}
throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
default:
throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
}
}
// Returns a Proxy element corresponding to the specified screen coordinates.
internal override ProxySimple ElementProviderFromPoint(int x, int y)
{
// prev button
if (IsVisible(_hwnd, NativeMethods.PGB_TOPORLEFT))
{
NativeMethods.Win32Rect rc = PagerButton.BoundingRect(_hwnd, PagerItem.PrevBtn);
if (Misc.PtInRect(ref rc, x, y))
{
return(new PagerButton(_hwnd, this, PagerItem.PrevBtn));
}
}
// Next button
if (IsVisible(_hwnd, NativeMethods.PGB_BOTTOMORRIGHT))
{
NativeMethods.Win32Rect rc = PagerButton.BoundingRect(_hwnd, PagerItem.NextBtn);
if (Misc.PtInRect(ref rc, x, y))
{
return(new PagerButton(_hwnd, this, PagerItem.NextBtn));
}
}
return(null);
}