internal PenContext[] CreateContexts(IntPtr hwnd, PenContexts contexts)
{
int c = Count + _deferredTablets.Count;
PenContext[] ctxs = new PenContext[c];
int i = 0;
foreach (TabletDevice tablet in _tablets)
{
ctxs[i++] = tablet.As <WispTabletDevice>().CreateContext(hwnd, contexts);
}
// DevDiv:1078091
// We need to re-enable contexts for anything that is marked
// as a pending disposal. This is so we continue getting any
// Wisp messages that might be waiting to come over the shared
// memory channel.
foreach (TabletDevice tablet in _deferredTablets)
{
ctxs[i++] = tablet.As <WispTabletDevice>().CreateContext(hwnd, contexts);
}
return(ctxs);
}
internal override void UpdateState(UIElement element)
{
bool unhookPenContexts = true;
// Disable processing of the queue during blocking operations to prevent unrelated reentrancy
// which a call to Lock() can cause.
using (element.Dispatcher.DisableProcessing())
{
// See if we should be enabled
if (element.IsVisible && element.IsEnabled && element.IsHitTestVisible)
{
PresentationSource presentationSource = PresentationSource.CriticalFromVisual(element as Visual);
if (presentationSource != null)
{
unhookPenContexts = false;
// Are we currently hooked up? If not then hook up.
if (_penContexts == null)
{
InputManager inputManager = (InputManager)element.Dispatcher.InputManager;
PenContexts penContexts = StylusLogic.GetCurrentStylusLogicAs <WispLogic>().GetPenContextsFromHwnd(presentationSource);
// _penContexts must be non null or don't do anything.
if (penContexts != null)
{
_penContexts = penContexts;
lock (penContexts.SyncRoot)
{
penContexts.AddStylusPlugInCollection(Wrapper);
foreach (StylusPlugIn spi in Wrapper)
{
spi.InvalidateIsActiveForInput(); // Uses _penContexts being set to determine active state.
}
// NTRAID:WINDOWSOS#1677277-2006/06/05-WAYNEZEN,
// Normally the Rect will be updated when we receive the LayoutUpdate.
// However there could be a race condition which the LayoutUpdate gets received
// before the properties like IsVisible being set.
// So we should always force to call OnLayoutUpdated whenever the input is active.
Wrapper.OnLayoutUpdated(this.Wrapper, EventArgs.Empty);
}
}
}
}
}
if (unhookPenContexts)
{
Unhook();
}
}
}
