Re: Focus for NPAPI plug-in for Alt-Tab

On Tuesday, January 24, 2012 5:13:42 PM UTC+5:30, jaitirth shirole wrote:
> In our NPAPI plug-in, we handle WM_SETFOCUS in the plug-in's wndproc.
> We get here when we switch tabs in a Firefox browser window.
> But, if we Alt-Tab to another Windows application and come back, we
> don't get this event.
> If we do Alt-Tab for the second time, this event does get fired!
> How does Mozilla code decide when to handover WM_SETFOCUS to plug-in's
> wndproc and when not to?
> How can we guaranteedly receive this event in this particular Alt-Tab
> case when the plug-in containing Firefox top level window is indeed
> getting activated?
> 
> BTW, I've seen the same behavior for Flash & PDF plug-ins.
> 
> Any solutions, workaround?

Hi jaitirth

Work around which I found are
1. to use the ClipRect value. ClipRect will be empty in hidden case.
2. Register for javascript events Blur and Focus.

Regards,
Vishu