mguardkeycapture.h

symbian s60手机上的短信拦截源代码。

/*
* ============================================================================
*  Name     :  MGuardKeyCapture.h
*  Part of  :  MGuard
*  Created  :  July 21 2007 by xueyw
*  Description:
*  Copyright: 
* ============================================================================
*/


#ifndef __MGUARDKEYCAPTURE_H__
#define __MGUARDKEYCAPTURE_H__


//  Include Files
#include <e32base.h>
#include <w32std.h>  // RWsSession

// Forward declarations
class RWindowGroup;
class CApaWindowGroupName;

class CGuardKeyCapturer : public CActive 
{
public:
	// New functions

	/** 
	* Registers itself for the key press events
	* @leave Symbian standard leave codes
	*/
	void StartCapturingL();
	void StopCapturingL();
	void ResumeCapturingL();
	~CGuardKeyCapturer();

public:
	CGuardKeyCapturer();
	
public:
	// From CActive

	/**
	* Is called by active scheduler when key press happens
	*/
	void RunL();
	
public:
	TBool	IsCaptureStarted()
	{
		return iCaptureStarted;
	}
	
		TBool	IsCatpurePending()
	{
		return iCapturePending;
	}
	
	enum
	{
		EMaxKeyCount = 160
	};
protected:
	/**
	* Is called when event listening should be stopped
	*/
	virtual void DoCancel();
	
private:
	// Data

	// Session to the window server
	RWsSession 				iWsSession;

	// Window group created to listed to the events
	RWindowGroup* 			iWindowGroup;

	// Is used to hide window from the task switcher
	CApaWindowGroupName* 	iWindowGroupName;

	// Handle to the capturing request
	TInt32 					iCaptureHandle[EMaxKeyCount];
	TInt					iCaptureHandleCount;

	// Handle to the second capturing request
	TInt32 					iLongCaptureHandle;

	// Number of keypresses already captured
	TInt 					iCaptureCounter;
	TBool					iCaptureStarted;
	TBool					iCapturePending;
};

#endif  // __MGUARDKEYCAPTURE_H__

// End of file