Continuous Digital Zooming

This tutorial describes how to perform continuous digital zooming using the Ecam API.

1. 
   Call CCameraAdvancedSettings::NewL(CCamera&) to create a CCameraAdvancedSettings object.
2. 
   Call CCameraAdvancedSettings::GetSupportedContinuousZoomTypeL(TUint&) to retrieve supported continuous zoom options for CCameraAdvancedSettings .
3. 
   Call CCameraAdvancedSettings::CreateContinuousZoomL(MContinuousZoomObserver&, TContinuousZoomType, CCameraContinuousZoom*&) to create a continuous zoom object.
4. 
   Call CCameraContinuousZoom::GetContinuousZoomSupportInfoL(CCameraAdvancedSettings::TContinuousZoomSupportInfo&) to retrieve information about the supported settings related to continuous zoom.
5. 
   Call CCameraAdvancedSettings::StartContinuousZoomL(CCameraAdvancedSettings::TContinuousZoomParameters) to start the continuous zoom operation.
6. 
   Call the CCameraContinuousZoom::ContinuousZoomProgress(CCameraContinuousZoom&, TInt, TInt) function when a new zoom factor has achieved during the current continuous zoom operation.
7. 
   Call the CCameraAdvancedSettings::GetContinuousZoomId (TInt aZoomId) function when you use more than one continuous zoom operation. This function is used to retrieve a unique ID which you can use to determine the callback function (like ContinuousZoomProgress() or ContinuousZoomCompleted() ) is associated with which continuous zoom object.
8. 
   Call CCameraContinuousZoom::ContinuousZoomCompleted() to inform you that the continuous zoom function has either completed successfully or to report an error that has caused the operation to fail. Note: This callback function does not actually stop the continuous zoom.
9. 
   Call CCameraAdvancedSettings::StopContinuousZoom() to stop continuous zooming, if the continuous zoom function has not already completed.

       
        
       
       CCamera* camera;
MCameraObserver2* observer2;
Camera = CCamera::New2L(*observer2, 0);
CCamera::CCameraAdvancedSettings* settings = CCamera::CCameraAdvancedSettings::NewL(*camera);
 
TUint supportedContinuousZoomType;
settings->GetSupportedContinuousZoomTypeL(supportedContinuousZoomType);
               
CCamera::CCameraAdvancedSettings::TContinuousZoomType continuousZoomType =
                       CCamera::CCameraAdvancedSettings::EContinuousZoomMixed;
 
MContinuousZoomObserver* continuousZoomObserver;     
CCamera::CCameraContinuousZoom* continuousZoom = NULL;
settings->CreateContinuousZoomL(*continuousZoomObserver, continuousZoomType, continuousZoom);
        
CCamera::CCameraAdvancedSettings::TContinuousZoomSupportInfo info;
continuousZoom->GetContinuousZoomSupportInfoL(info);
        
CCamera::CCameraAdvancedSettings::TContinuousZoomParameters param;
param.iContinuousZoomType = continuousZoomType;
param.iContinuousZoomAcceleration = 0;
param.iContinuousZoomSpeed = 1;
param.iContinuousZoomLimit = 5;
param.iZoomDirection = CCamera::CCameraAdvancedSettings::EZoomDirectionWide;
 
continuousZoom->StartContinuousZoomL(param);