audioplayerappui.cpp

一个视频播放器的源代码！供新手学习！功能很简单

/**
 *
 * @brief Definition of CAudioPlayerAppUi
 *
 * Copyright (c) EMCC Software Ltd 2003
 * @version 1.0
 */

// INCLUDE FILES

// Class include
#include "AudioPlayerAppUi.h"

// System includes
#include <uikon.hrh>			// EEikCmdExit
#include <eikmenup.h>
#include <eikbtgpc.h>
#include <AudioPlayer.rsg>

// User includes
#include "AudioPlayer.hrh"			// menu commands
#include "AudioPlayerView.h"		// CAudioPlayerAppView
#include "AudioPlayerApplication.h"	// app uid
#include "AudioPlayerEngine.h"		// for state, so that appropriate menu can be drawn


/**
 * Destructor.
 */
CAudioPlayerAppUi::~CAudioPlayerAppUi()
	{
    if (iView)
        {
	    RemoveFromStack(iView);
	    delete iView;
        }
	}

/**
 * Symbian OS 2nd phase constructor.  Constructs the application's view.
 * Add the view to the control stack so it can receive user input
 */
void CAudioPlayerAppUi::ConstructL()
    {
    BaseConstructL();

	iView = CAudioPlayerView::NewL(ClientRect());
	iView->SetMopParent(this);
	AddToStackL(iView);

	Cba()->MakeVisible(ETrue);
	}

/**
 * From CEikAppUi, takes care of command handling for the view.
 *
 * @param aCommand command to be handled
 */
void CAudioPlayerAppUi::HandleCommandL(TInt aCommand)
	{
	switch(aCommand)
		{
		case EAknSoftkeyExit:
		case EAknSoftkeyBack:
			Exit();
			break;
		case EAudioPlayerMenuPlayTone:
			iView->PlayToneL();
			break;
		case EAudioPlayerMenuPlayStream:
			iView->PlayStreamL();
			break;
		case EAudioPlayerMenuPlayFileWav:
			iView->PlayWavL();
			break;
		case EAudioPlayerMenuPlayFileMidi:
			iView->PlayMidiL();
			break;
		case EAudioPlayerMenuStop:
			iView->StopL();
			break;
		default:
			break;
		}
	}

/**
* Framework function called prior to displaying a menu so that, in the current
* application context, irrelevant items can be hidden and relevant items displayed.
*
* @param aResourceId The ID of the menu from its resource declaration
* @param aMenuPane The menu as a usable object
*/
void CAudioPlayerAppUi::DynInitMenuPaneL(TInt aResourceId, CEikMenuPane* aMenuPane)
// updates the menu according to the state of the engine and if the view is showing the messages
	{
#ifdef __WINS__
	// Grey out the MIDI option on the emulator.
	if (aResourceId == R_AUDIOPLAYER_MENU_PLAYFILELIST)
		{
		aMenuPane->SetItemDimmed(EAudioPlayerMenuPlayFileMidi, ETrue);
		}
#endif

	if (aResourceId != R_AUDIOPLAYER_MENU)
		{
		return;
		}

	switch (iView->State())
		{
		case CAudioPlayerEngine::EStopped:
			aMenuPane->SetItemDimmed(EAudioPlayerMenuPlayTone, EFalse);
			aMenuPane->SetItemDimmed(EAudioPlayerMenuPlayFile, EFalse);
			aMenuPane->SetItemDimmed(EAudioPlayerMenuPlayStream, EFalse);
			aMenuPane->SetItemDimmed(EAudioPlayerMenuStop, ETrue);
			break;
		case CAudioPlayerEngine::EPlaying:
			aMenuPane->SetItemDimmed(EAudioPlayerMenuPlayTone, ETrue);
			aMenuPane->SetItemDimmed(EAudioPlayerMenuPlayFile, ETrue);
			aMenuPane->SetItemDimmed(EAudioPlayerMenuPlayStream, ETrue);
			aMenuPane->SetItemDimmed(EAudioPlayerMenuStop, EFalse);
			break;
		default:
			break;
		}
	}