NewLC - CPeriodic Error - Comments

Re: CPeriodic Error

pladaojuk — Sat, 02 Feb 2008 18:04:42 +0100

http://wiki.forum.nokia.com/index.php/How_to_use_CPeriodic_for_a_steady_stream_of_ticks

I try this code and it's ok. Sorry , I can compile above code but get "runtime error"

CPeriodic Error

spideronz — Thu, 31 Mar 2005 15:13:08 +0200

Ghgh is danbgerous that when i close the application appers an Alloc error?

CPeriodic Error

spideronz — Thu, 31 Mar 2005 14:27:58 +0200

mmm k... so i have tu put before this line the code ActivateGc();
I think....

CPeriodic Error

didster — Thu, 31 Mar 2005 14:18:23 +0200

There:

CWindowGc& gc = SystemGc();

You said it you self - the timer calls this function - not the drawing system - and you try to get a device context - and one wont have been activiated yet.

From a reply to one of your other posts, try this:

void CprovaContainer::MenuGenerate()
{
Window().Invalidate();
ActivateGc();
Window().BeginRedraw();

CWindowGc& gc = SystemGc();
gc.BitBlt( Rect().iTl,iBitmap );
gc.BitBlt(TPoint(0,0), iBitmap);

Window().EndRedraw();
DeactivateGc();
}

BTW, im not saying this is the best way to do this - but it should work.

Window().EndRedraw();
DeactivateGc();

CPeriodic Error

spideronz — Thu, 31 Mar 2005 13:57:33 +0200

ok but is with this code that application exit... where's the error? LoL

The timer calls this function...

Code:

void CprovaContainer::MenuGenerate()
{
CWindowGc& gc = SystemGc();
gc.BitBlt( Rect().iTl,iBitmap );
gc.BitBlt(TPoint(0,0), iBitmap);
DrawNow();
}

Ant it's correct....

CPeriodic Error

didster — Thu, 31 Mar 2005 12:49:40 +0200

Yes.

Remember that code I showed you earlier in the post? Suround the drawing code in that.

CPeriodic Error

spideronz — Thu, 31 Mar 2005 12:12:54 +0200

LoL i've lost the constructor during the scripting.

But the application exit anyway but this time with this error:

WSERV 9

Using the debugger it exit the application but doesn't indicate me the error in the code... only exit with WSERV 9

It exit when i call the DrawNow(); function

The error is

Attempted to use a non-active graphics context.

A drawing request was sent to a graphics context when the context was not active.

On the server side, this panic is raised by CWsGc::CommandL() on all requests received when the context isnÂ’t active except EWsGcOpActivate, EWsGcOpDeactivate, EWsGcOpFree, and EWsGcOpTestInvariant.

Probably it gives me error when i try to draw something from and external function like Menugenerate

CPeriodic Error

didster — Thu, 31 Mar 2005 11:57:34 +0200

Which says to me iPeridoc hasn't been constructed yet...

CPeriodic Error

spideronz — Thu, 31 Mar 2005 11:54:01 +0200

With the debugger it says that the problem is in file e32base.inl

Code:

// Class CActive
inline TBool CActive::IsActive() const
{return(iActive);} [b]<---This Line[/b]
inline TBool CActive::IsAdded() const
{return(iLink.iNext!=NULL);}
inline TInt CActive::Priority() const
{return iLink.iPriority;}

CPeriodic Error

didster — Thu, 31 Mar 2005 11:53:49 +0200

Ok. Probably about the worse panic you can get (in terms of finding it) but a start. Usually caused by accessing invalid memory - just where do you allocate iPeriodic?

Place a break point in ReDraw, and run it under the debugger.

CPeriodic Error

spideronz — Thu, 31 Mar 2005 11:43:24 +0200

adding the file it's write to me:

Program Closed:
Prova
Kern-Exec 3

The Debuggind don't seems to work.

CPeriodic Error

didster — Thu, 31 Mar 2005 11:36:07 +0200

Create the file ErrRd (blank, no extension) in the folder C:\system\bootdata on the emulator (emulated C drive, thats \epoc32\wins(cw)\) and try again.

It won't just go back to the menu (is this Series 60 BTW?) it should display something.

Try debugging it.

CPeriodic Error

spideronz — Thu, 31 Mar 2005 11:33:00 +0200

He exit from di application... it backs to the menu.... without any arror

CPeriodic Error

didster — Thu, 31 Mar 2005 11:31:25 +0200

Define crash? You need to be more specifc. Debug it, on what line does it crash? Whats the panic code? It will say app closed... what comes after it, there should be a catagory (like USER) and a code (like 11)

CPeriodic Error

spideronz — Thu, 31 Mar 2005 11:31:07 +0200

If I use this ReDraw function it crashes anyway

Code:

void CprovaContainer::ReDraw() {
if(this->status != 5)
{
if(iPeriodic->IsActive())
{
StopTimer();
}
}
else
{
if(!iPeriodic->IsActive())
{
// StartTimer();
MenuGenerate();
}
}
DrawNow();

}

Probably there's a problem in Menugenerate function... but i don't understand the reason

CPeriodic Error

spideronz — Wed, 30 Mar 2005 21:53:28 +0200