capturingkeys.h

用来学习 焦点 的 的例子,可以 好好看看焦点在 symbian中很重要,

#ifndef __KEYCAPTURE_H__
#define __KEYCAPTURE_H__

#include <e32base.h>
#include <W32STD.H>


class MKeyCallBack 
{
public:
	virtual TBool KeyCapturedL(TWsEvent aEvent) = 0;
};
 
class CKeyCapturer : public CActive 
{
public:
	static CKeyCapturer* NewL(MKeyCallBack& aObserver);
	static CKeyCapturer* NewLC(MKeyCallBack& aObserver);
	virtual ~CKeyCapturer();
private:
	CKeyCapturer(MKeyCallBack& aObserver);
	void ConstructL();
	void RunL();
	void DoCancel();
	void Listen();
private:
	MKeyCallBack& 	iObserver;
	RWsSession     	iWsSession;
	RWindowGroup    iWg; 
	TInt 			iHandle;
};

#endif // __KEYCAPTURE_H__