scalablescreendrawingview.cpp

一个界面绘图的例子

// ScalableScreenDrawingView.cpp
// ------------------
//

////////////////////////////////////////////////////////////////////////
//
// Source file for the implementation of the
// view class - CScalableScreenDrawingView
//
////////////////////////////////////////////////////////////////////////

#include "ScalableScreenDrawingView.h"
#include "ScalableScreenDrawing.h"
#include <aknutils.h>

// Static constructor
CScalableScreenDrawingView* CScalableScreenDrawingView::NewLC()
    {
    CScalableScreenDrawingView* self = new (ELeave) CScalableScreenDrawingView;
    CleanupStack::PushL(self);
    self->ConstructL();
    return self;
    }

// Default constructor
CScalableScreenDrawingView::CScalableScreenDrawingView()
    {
    iContainer = NULL;
    }

// Second-phase constructor
void CScalableScreenDrawingView::ConstructL()
    {
    BaseConstructL();
    }

// Destructor
CScalableScreenDrawingView::~CScalableScreenDrawingView()
    {
    DoDeactivate();
    }

// Destroy control when view is deactivated.
void CScalableScreenDrawingView::DoDeactivate()
    {
    if(iContainer)
        {
        AppUi()->RemoveFromStack(iContainer);
        delete iContainer;
        iContainer = NULL;
        }
    }

// View creates the control when it is activated.
void CScalableScreenDrawingView::DoActivateL(const TVwsViewId& /*aPrevViewId*/,TUid /*aCustomMessageId*/,
                           const TDesC8& /*aCustomMessage*/)
    {
    __ASSERT_ALWAYS(iContainer == NULL, User::Panic(_L("SNOWVIEW"), KErrAlreadyExists));
    iContainer = new (ELeave) CScalableScreenDrawingControl();
    iContainer->SetMopParent(this);
    iContainer->ConstructL( AppUi()->ApplicationRect(), AppUi() );  // For full screen
    AppUi()->AddToStackL( *this, iContainer );
    }

TUid CScalableScreenDrawingView::Id() const
    {
    return KScalableScreenDrawingViewId;
    }

// End of file.