examples/Graphics/WS/BackedUp/Base.h

/*
Copyright (c) 2005-2010 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of Nokia Corporation nor the names of its contributors
  may be used to endorse or promote products derived from this software
  without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Description:  
*/




#if !defined(__WSBACKED_H__)
#define __WSBACKED_H__

// Forward declarations
class CWsRedrawer;
class CWindow;
class CBackedUpWindow;

//                                              Declaration of CWsClient

class CWsClient : public CActive
        {
protected:
        //construct
        CWsClient();
        CWsScreenDevice* iScreen;
        CWsRedrawer* iRedrawer;
        RWsSession iWs;
        TWsEvent iWsEvent;
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;
private:
        RWindowGroup iGroup;
        CWindowGc* iGc;
        friend class CWsRedrawer; // needs to get at session
        friend class CWindow; // needs to get at session
        friend class CBackedUpWindow;
        };



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

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

#endif

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