Symbia源代码还原 void CCoeControl::ActivateL(void)

ActivateL是个好东西，好多人都想知道其内部实现，可惜苦于没有源代码。现在我把逆向代码贴出来，让大家一饱眼福，呵呵。错误在所难免。

RDrawableWindow* iWin;

CCoeControl::OwnsWindow() Tests if the control is window-owning...

CCoeControl::CapturesPointer() Tests whether pointer capture is set for the control.This returns true if SetPointerCapture() has been called with aCapture=ETrue.

CCoeControl::IsReadyToDraw() Tests if the control is ready for drawing.This returns true if the control has been activated and is visible

RWsSession::PurgePointerEvents() Removes all pointer events waiting to be delivered to this session.The events are removed from the event queue without being processed. This might occur, for example, at application startup.

CCoeControl::IsBackedUp() Tests if the window owned by the control is a backed-up window.

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void CCoeControl::ActivateL(void)

{

if(iFlags & 0x80000)

{

User::LeaveNoMemory();

}

if(EFalse == IsActivated)

{

iFlags |= 0x10; //set to active

if( OwnsWindow() ) //Tests if the control is window-owning...

{

iWin->Activate();

if(CapturesPointer())

{

if(IsReadyToDraw())

{

//Removes all pointer events waiting to be delivered to this session.

//The events are removed from the event queue without being processed.

//This might occur, for example, at application startup.

iCoeEnv->WsSession()->PurgePointerEvents();

}

}

if(IsBackedUp())

{

DrawNow();

}

}

//Some codes here....

//RCoeDynamicDataStorage相关操作，这个类并没有任何资料，

//所以关于这个类的相关操作，我们无从得知。

}

TInt ctrlCounts = CountComponentControls();

TInt index = 0 ;

while(index < ctrlCounts)

{

CCoeControl* subCtrlPtr = ComponentControl(index);

subCtrlPtr->ActivateL();

index++;

}

}