examples/Graphics/WS/VectorSprite/VectorSprite.cpp

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

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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:  
*/


#include <w32std.h>
#include "Base.h"
#include "VectorSprite.h"

CSprite::CSprite(CWsClient *aClient) : iClient(aClient)
        {
        }

CSprite::~CSprite()
        {
        for (TInt i=0; i<4; i++)
                {
                delete iSpriteMember[i].iBitmap;
                delete iSpriteMember[i].iMaskBitmap;
                }
        iSprite.Close();
        }

void CSprite::ConstructL(CWindow* aWindow)
        {
        iSprite = RWsSprite(iClient->iWs);
        User::LeaveIfError(iSprite.Construct(aWindow->Window(), TPoint(100,100), 0));
        for (TInt spriteNum = 0; spriteNum < 4; spriteNum++)
                {
                CreateBitmapL(iSpriteMember[spriteNum].iBitmap, spriteNum, EFalse);
                CreateBitmapL(iSpriteMember[spriteNum].iMaskBitmap, spriteNum, ETrue);
                iSpriteMember[spriteNum].iInvertMask = EFalse;
                iSpriteMember[spriteNum].iOffset = TPoint (0,0);
                iSpriteMember[spriteNum].iInterval = TTimeIntervalMicroSeconds32 (500000);
                iSpriteMember[spriteNum].iDrawMode = CGraphicsContext::EDrawModePEN;
                User::LeaveIfError(iSprite.AppendMember(iSpriteMember[spriteNum]));
                }
        User::LeaveIfError(iSprite.Activate());
        iSprite.UpdateMember(3);
        }

void CSprite::CreateBitmapL(CFbsBitmap* &aBitmap, TInt aSpriteNum, TBool aDoMask)
        {
    // device and context for drawing to the off-screen bitmap
    CFbsBitmapDevice* bitmapDevice;
    CGraphicsContext* bitmapContext;
    
    // create bitmap
        // aBitmap is effectively member data of CSprite, and this function is only
        // called from CSprite's constructor. This means we can be sure aBitmap has 
        // not been new'ed before (if it had, we'd need to do a delete here and set
        // aBitmap to 0.
    aBitmap = new (ELeave) CFbsBitmap();
    aBitmap->Create(TSize(50,50),EGray4);
    // create a device and gc for it
    bitmapDevice = CFbsBitmapDevice::NewL(aBitmap);
    bitmapDevice->CreateContext(bitmapContext);
        // Set up pen color etc.
        bitmapContext->SetBrushColor(aDoMask? TRgb::Gray4(0) : TRgb::Gray4(2));
        bitmapContext->SetBrushStyle(CGraphicsContext::ESolidBrush);
        bitmapContext->SetPenStyle(CGraphicsContext::ENullPen);
        bitmapContext->DrawRect(TRect(TSize(50,50)));
        bitmapContext->SetPenStyle(CGraphicsContext::ESolidPen);
        bitmapContext->SetPenSize(TSize(4,4));
        bitmapContext->SetPenColor(aDoMask? TRgb::Gray4(3) : TRgb::Gray4(0));
    // draw to it
        switch (aSpriteNum)
                {
        case 0:
            bitmapContext->DrawLine (TPoint(10,10), TPoint(40,40));
                break;
        case 1:
                bitmapContext->DrawLine (TPoint(25,10), TPoint(25,40));
                break;
        case 2:
                bitmapContext->DrawLine (TPoint(40,10), TPoint(10,40));
                break;
        case 3:
                bitmapContext->DrawLine (TPoint(10,25), TPoint(40,25));
                break;
                }
    // delete the context and device
    delete bitmapContext;
    delete bitmapDevice;
        }

/****************************************************************************\
|       Function:       Constructor/Destructor for CMainWindow
|       Input:          aClient         Client application that owns the window
\****************************************************************************/
CMainWindow::CMainWindow (CWsClient* aClient)
: CWindow (aClient)
        {
        }


CMainWindow::~CMainWindow ()
        {
        iWindow.Close();
        }

/****************************************************************************\
|       Function:       CMainWindow::Draw
|       Purpose:        Redraws the contents of CMainWindow within a given
|                               rectangle.
|       Input:          aRect   Rectangle that needs redrawing
|       Output:         None
\****************************************************************************/

void CMainWindow::Draw(const TRect& aRect)
        {
        CWindowGc* gc=SystemGc(); // get a gc
        gc->SetClippingRect(aRect); // clip outside this rect
        gc->Clear(aRect); // clear
        gc->SetPenStyle(CGraphicsContext::ESolidPen);
        gc->SetPenColor(TRgb::Gray4(2));
        TSize size = Window().Size();
        TInt width = size.iWidth;
        TInt height = size.iHeight;
        TInt numHoriz=height/5;
        TInt numVert=width/10;
        for (TInt i=numHoriz; i>0; i--)
                {
                gc->DrawLine (TPoint(0,height/numHoriz*i), TPoint(width, height/numHoriz*i));
                }
        for (TInt j=numVert; j>0; j--)
                {
                gc->DrawLine (TPoint(width/numVert*j, 0), TPoint(width/numVert*j, height));
                }
        }


/****************************************************************************\
|       Function:       CMainWindow::HandlePointerEvent
|       Purpose:        Handles pointer events for CMainWindow.
|       Input:          aPointerEvent   The pointer event!
|       Output:         None
\****************************************************************************/

void CMainWindow::HandlePointerEvent (TPointerEvent& aPointerEvent)
        {       
        switch (aPointerEvent.iType)
                {
        case TPointerEvent::EButton1Down:
                break;
        case TPointerEvent::EButton1Up:
                break;
        case TPointerEvent::EButton3Down:
                break;
        default:
                break;
                }
        }


//                                       CExampleWsClient implementation

CExampleWsClient* CExampleWsClient::NewL(const TRect& aRect)
        {
        // make new client
        CExampleWsClient* client=new (ELeave) CExampleWsClient(aRect); 
        CleanupStack::PushL(client); // push, just in case
        client->ConstructL(); // construct and run
        CleanupStack::Pop();
        return client;
        }

/****************************************************************************\
|       Function:       Constructor/Destructor for CExampleWsClient
|                               Destructor deletes everything that was allocated by
|                               ConstructMainWindowL()
\****************************************************************************/

CExampleWsClient::CExampleWsClient(const TRect& aRect)
:iRect(aRect)
        {
        }

CExampleWsClient::~CExampleWsClient ()
        {
        delete iMainWindow;
        delete iSprite;
        }


/****************************************************************************\
|       Function:       CExampleWsClient::ConstructMainWindowL()
|                               Called by base class's ConstructL
|       Purpose:        Allocates and creates all the windows owned by this client
|                               (See list of windows in CExampleWsCLient declaration).
\****************************************************************************/

void CExampleWsClient::ConstructMainWindowL()
        {
        iMainWindow=new (ELeave) CMainWindow(this);
        iMainWindow->ConstructL(iRect, TRgb (255,255,255));
        iSprite=new (ELeave) CSprite (this);
        iSprite->ConstructL(iMainWindow);
        }


/****************************************************************************\
|       Function:       CExampleWsClient::RunL()
|                               Called by active scheduler when an even occurs
|       Purpose:        Processes events according to their type
|                               For key events: calls HandleKeyEventL() (global to client)
|                               For pointer event: calls HandlePointerEvent() for window
|                                  event occurred in.
\****************************************************************************/
void CExampleWsClient::RunL()
        {
        // get the event
        iWs.GetEvent(iWsEvent);
        TInt eventType=iWsEvent.Type();
        // take action on it
        switch (eventType)
                {
        // events global within window group
        case EEventNull:
                break;
        case EEventKey:
                {
                TKeyEvent& keyEvent=*iWsEvent.Key(); // get key event
                HandleKeyEventL (keyEvent);
                break;
                }
        case EEventModifiersChanged:
                break;
        case EEventKeyUp:
        case EEventKeyDown:
        case EEventFocusLost:
        case EEventFocusGained:
        case EEventSwitchOn:
        case EEventPassword:
        case EEventWindowGroupsChanged:
        case EEventErrorMessage:
                break;
        // events local to specific windows
        case EEventPointer:
                {
                CWindow* window=(CWindow*)(iWsEvent.Handle()); // get window
                TPointerEvent& pointerEvent=*iWsEvent.Pointer();
                window->HandlePointerEvent (pointerEvent);
                break;
                }
        case EEventPointerExit:
        case EEventPointerEnter:
                break;
        case EEventPointerBufferReady:
                {
                break;
                }
        case EEventDragDrop:
                break;
        default:
                break;
                }
        IssueRequest(); // maintain outstanding request
        }

/****************************************************************************\
|       Function:       CExampleWsClient::HandleKeyEventL()
|       Purpose:        Processes key events for CExampleWsClient
\****************************************************************************/
void CExampleWsClient::HandleKeyEventL (TKeyEvent& /*aKeyEvent*/)
        {
        }

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