examples/Graphics/WS/PtBuffer/Base.h

// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// License: "Symbian Foundation License v1.0" to Symbian Foundation
// members and "Symbian Foundation End User License Agreement v1.0"
// to non-members at the URL
// "http://www.symbianfoundation.org/legal/licencesv10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
//


#if !defined(__WINORD_H__)
#define __WINORD_H__

// Forward declarations
class CWsRedrawer;
class CWindow;


//                                              Declaration of CWsClient

class CWsClient : public CActive
        {
public:
        void ConstructL();
        // destruct
        ~CWsClient();
        // main window
        virtual void ConstructMainWindowL();
        // terminate cleanly
        void Exit();
        // active object protocol
        void IssueRequest(); // request an event
        void DoCancel(); // cancel the request
        virtual void RunL() = 0; // handle completed request
        virtual void HandleKeyEventL (TKeyEvent& aKeyEvent) = 0;
protected:
        //construct
        CWsClient();
        CWsScreenDevice* iScreen;
        CWsRedrawer* iRedrawer;
        RWsSession iWs;
        TWsEvent iWsEvent;
private:
        RWindowGroup iGroup;
        CWindowGc* iGc;
        friend class CWsRedrawer; // needs to get at session
        friend class CWindow; // needs to get at session
        };



//                                              CWsRedrawer declaration

class CWsRedrawer : public CActive
        {
public:
        // construct/destruct
        CWsRedrawer();
        void ConstructL(CWsClient* aClient);
        ~CWsRedrawer();
        // drawing
        void IssueRequest();
        void DoCancel();
        void RunL();
protected:
                CWsClient* iClient;
        };


//                                                      CWindow declaration

class CWindow : public CBase
        {
protected:
        RWindow iWindow; // window server window
        TRect iRect; // window's extent
public:
        enum {KPointerMoveBufferSize=32};
        CWindow(CWsClient* aClient);
        void ConstructL (const TRect& aRect, const TRgb& aColor, CWindow* aParent=0);
        ~CWindow();
        // access
        RWindow& Window(); // our own window
        CWindowGc* SystemGc(); // system graphics context
        CWsScreenDevice* Screen();
        // drawing
        virtual void Draw(const TRect& aRect) = 0;
        virtual void HandlePointerEvent (TPointerEvent& aPointerEvent) = 0;
        virtual void HandlePointerMoveBufferReady () = 0;
private:
        CWsClient* iClient; // client including session and group
        };


#endif

---