camtestappui.cpp

symbian下摄像头拍照示例,symbian c 开发

/*
============================================================================
 Name        : CamTestAppUi.cpp
 Author      : 
 Version     :
 Copyright   : Your copyright notice
 Description : Main application UI class (controller)
============================================================================
*/

// INCLUDE FILES
#include <avkon.hrh>
#include <eikmenup.h>
#include <CamTest.rsg>
#include <apgcli.h>
#include <hal.h>
#include <hlplch.h>  // HlpLauncher
#include <aknnotewrappers.h> 

#include <centralrepository.h>
#include <ProfileEngineSDKCRKeys.h>

#include <aknmessagequerydialog.h>  // CAknMessageQueryDialog
#include <stringloader.h>

#include "CamTest.pan"
#include "CamTestAppUi.h"
#include "CamTestAppView.h"
#include "CamTest.hrh"
#include "CameraAppController.h"
#include "CameraAppBaseContainer.h"
#include "MyLogger.h"

// ============================ MEMBER FUNCTIONS ===============================


// -----------------------------------------------------------------------------
// CCamTestAppUi::ConstructL()
// Symbian 2nd phase constructor can leave.
// -----------------------------------------------------------------------------
//
void CCamTestAppUi::ConstructL()
    {
    // Initialise app UI with standard value.
		// Try to resolve the best orientation for the app
		BaseConstructL(EAknEnableSkin/*|ResolveCameraOrientation()*/);

		// Resolve the Media Gallery application's UID (a native app)
	//	iMediaGalleryUid3 = KMediaGalleryUID3PostFP1;

		// Create a camera controller 创建一个照相机控制器
		iController = new (ELeave) CCameraAppController(*this);
		iController->ConstructL();


		iView = CCamTestAppView::NewLC();
		AddViewL( iView );      // transfer ownership to CAknViewAppUi
		CleanupStack::Pop(iView);
		SetDefaultViewL(*iView);

		// Make this class observe changes in foreground events
//		iEikonEnv->AddForegroundObserverL( *this );

		// Default mode is viewfinding  默认模式viewfinding
		iCameraMode = EViewFinding;

    // Create view object
  //  iView = CCamTestAppView::NewL( ClientRect() );
    }
// -----------------------------------------------------------------------------
// CCamTestAppUi::CCamTestAppUi()
// C++ default constructor can NOT contain any code, that might leave.
// -----------------------------------------------------------------------------
//
TCameraMode CCamTestAppUi::CameraMode()
{
	return iCameraMode;
}
CCamTestAppUi::CCamTestAppUi()
: CAknViewAppUi(),
 iController( 0 )
    {
    // No implementation required
    }

// -----------------------------------------------------------------------------
// CCamTestAppUi::~CCamTestAppUi()
// Destructor.
// -----------------------------------------------------------------------------
//
CCamTestAppUi::~CCamTestAppUi()
    {
		if (iController)
			delete iController;

    }

// -----------------------------------------------------------------------------
// CCamTestAppUi::HandleCommandL()
// Takes care of command handling.
// -----------------------------------------------------------------------------
//
void CCamTestAppUi::HandleCommandL( TInt aCommand )
    {
    switch( aCommand )
        {
        case EEikCmdExit:
        case EAknSoftkeyExit:
        	{
				Exit();
				break;
        	}
		case ECameraAppCmdSnap:
			{
				DoSnapL();
				break;
			}
		case ECameraAppCmdNewImage:
			{
				DoNewImageL();
				break;
			}
        default:
            Panic( ECamTestUi );
            break;
        }
    }
// -----------------------------------------------------------------------------
//  Called by the framework when the application status pane
//  size is changed.  Passes the new client rectangle to the
//  AppView
// -----------------------------------------------------------------------------
//


void CCamTestAppUi::HandleGainingForeground()
	{
		// Application gets focused so reserve the camera
		// if it was disabled (ResetEngine() called)
	MyLogger::Log(_L("kkk"));
		if (!iController)
		{
			ResetEngine();
		}
		MyLogger::Log(_L("ooo"));
	}
void CCamTestAppUi::HandleLosingForeground()  //释放摄像头资源
	{
		// Application loses focus so release the camera
		if (iController)
		{
			// Delete old controller and capture engine
			delete iController;
			iController = NULL;
		}
	}
	
	/*
	-------------------------------------------------------------------------------
	Reset controller and capture engine  复位控制器和 捕捉引擎
	-------------------------------------------------------------------------------
	*/
void CCamTestAppUi::ResetEngine()
	{
		// Delete old controller and capture engine
	
		if (iController)
		{
			delete iController;
			iController = NULL;
		}

		// Create new controller and capture engine 创建新的控制器
		iController = new (ELeave) CCameraAppController(*this);
		iController->ConstructL();

		// Set new controller pointers  设置新的 控制器 指针
		iView->iContainer->SetController(iController);
		iController->SetAppContainer(iView->iContainer);

		// Check orientation 检查方向
		CAknAppUiBase::TAppUiOrientation orientation = Orientation();
		if (orientation == CAknAppUiBase::EAppUiOrientationPortrait)
		{
			iController->SetCameraOrientation(ECameraPortrait);
		}
		else
		{
			iController->SetCameraOrientation(ECameraLandscape);
		}

		iController->SkipFrames(KNumOfFrames);
		iController->InitializeCameraL( ClientRect() );
		iController->StartViewFinderL();

		iCameraMode = EViewFinding;
		
	}
	/*
	-------------------------------------------------------------------------------
	Starts the viewfinder after taking a picture. Also updates the navi tabs.
	启动后取景拍照  更新标签
	-------------------------------------------------------------------------------
	*/
void CCamTestAppUi::DoNewImageL()
	{
		// Redisplay the default navi pane
		//重新默认导航窗格
		iController->RedrawNaviPaneL();

		//Start the viewfinder
		//启动器
		iController->StartViewFinderL();

		iCameraMode = EViewFinding;
	}
void CCamTestAppUi::DoSnapL()
	{
		// If the image is still being converted, then stop going further.
		//如果图像被转换  停止更进
		TEngineState state = iController->GetEngineState();//返回引擎状态

		if ( state != EEngineIdle && state != EConverted )
			return;

		if ( iController->IsCameraUsedByAnotherApp() )
			return;

		// Snap the picture and save the image into the specific location
		//捕获图像和 保存图像的位置
		if ( iCameraMode == EViewFinding )
		{
			// Ensure that there is enough free space left 确定有足够的空间
			if (iController->DiskSpaceBelowCriticalLevel())
			{
				HBufC* resMemoryLow = StringLoader::LoadLC(R_MEMORY_LOW);
				_LIT(KMemoryLowHdr, "");
				iEikonEnv->InfoWinL(*resMemoryLow, KMemoryLowHdr);
				CleanupStack::PopAndDestroy(resMemoryLow);
			}
			else
			{
				MyLogger::Log(_L("www"));
				iController->SnapL(); //拍摄图片
				MyLogger::Log(_L("qqq"));
				iCameraMode = EImageSnapped;
			}
		}
		else if ( iCameraMode == EImageSnapped )
		{
			// Since the camera has taken one picture, then do the viewfinding
			// again
			//已经拍摄了图片，  再次拍照调用DoNewImageL
			DoNewImageL();
		}
	}
// End of File