/*

* Copyright (c) 2002 - 2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*     A compound control class. It is responsible for drawing and updating

*     a set of buttons. Button selections are also handled and forwarded

*     as commands to the AppUi.

*

*/

// INCLUDE FILES

#include <avkon.hrh>

#include <eikenv.h> 

#include <AknsUtils.h> 

#include <voicerecorder.rsg> 

#include <aknbutton.h> 					

#include <e32base.h> 					

#include <barsread.h> 					// TResourceReader

#include <w32std.h>

#include <aknlayoutscalable_apps.cdl.h> // New button highlight

#include <e32std.h> 					// Timer

#include <AknsDrawUtils.h>

#include <applayout.cdl.h>

#include <AknsConstants.h> 

#include <AknIconUtils.h>

#include <data_caging_path_literals.hrh>

#include <eikappui.h> 

#include <aknViewAppUi.h>

#include <aknview.h>

#include <voicerecorder.mbg>

#include "CVRButtonPanel.h"

#include "MVRButtonPanelModel.h"

#include "voicerecorder.hrh"

#include "VRConsts.h"

// CONSTANTS

// Timer delays

const TInt KVRFastForwStartDelay( 500000 );

const TInt KVRFastForwUpdateDelay( 170000 );

const TInt KVRButtonCount( 5 );			   // Total number of buttons

const TInt KVRAmountOfFocusShrink( 5 );

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

// ---------------------------------------------------------------------------

// CVRButtonPanel::CVRButtonPanel

// 

// ---------------------------------------------------------------------------

//	

CVRButtonPanel::CVRButtonPanel( MVRButtonPanelModel* aModel )

    : iModel( aModel ),

    iVRButtons( KVRButtonCount )

	{

	__ASSERT_DEBUG( iModel, User::Panic( KVRPanic, KErrNotFound ) );

	iModel->SetButtonPanelObserver( this );

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::CVRButtonPanel

// 

// ---------------------------------------------------------------------------

//	

CVRButtonPanel::CVRButtonPanel( MVRButtonPanelModel* aModel,

                               TUid aParentViewUid )

    : iModel( aModel ),  

    iParentViewUid( aParentViewUid ),

    iVRButtons( KVRButtonCount )

	{

	__ASSERT_DEBUG( iModel, User::Panic( KVRPanic, KErrNotFound ) );

	iModel->SetButtonPanelObserver( this );

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::~CVRButtonPanel

// Destructor

// ---------------------------------------------------------------------------

//	

CVRButtonPanel::~CVRButtonPanel()

	{

	if ( iModel )

		{

		iModel->SetButtonPanelObserver( NULL );

		}

	iVRButtons.ResetAndDestroy();

	delete iTimer;

	iModel = NULL;

	iSkin = NULL;

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::ConstructL

// 

// ---------------------------------------------------------------------------

//	

void CVRButtonPanel::ConstructL()

	{

	iSkin = AknsUtils::SkinInstance();

	// Create buttons from resources

   	CreateButtonsFromResourcesL( R_VR_BUTTON_PANEL_BUTTONS );

   	UpdateButtons();

   	// Has to be done to get the buttons' background shown correctly

   	for ( TInt i = 0; i < iVRButtons.Count(); i++ )

    	{

    	iVRButtons.At( i )->SetBackground( this );

    	}

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::CreateButtonsFromResourcesL

// Creates buttons from resources

// ---------------------------------------------------------------------------

//    

void CVRButtonPanel::CreateButtonsFromResourcesL( TInt aButtonsResourceId )

	{	

	TResourceReader reader;

	iEikonEnv->CreateResourceReaderLC( reader, aButtonsResourceId );

	TInt numButtons( reader.ReadInt16() );

	// Create buttons

	for (TInt i = 0; i < numButtons; i++ )

		{

		CAknButton* aknButton = CAknButton::NewL();

		CleanupStack::PushL( aknButton );

		aknButton->SetContainerWindowL( *this );

		aknButton->SetMopParent( this ); 

	    aknButton->ConstructFromResourceL( reader );

		aknButton->SetObserver( this );

	    // Set ready to be drawn and add it to array

	    aknButton->ActivateL();

	   	iVRButtons.AppendL( aknButton );

	   	CleanupStack::Pop( aknButton ); // aknButton

		}

	CleanupStack::PopAndDestroy(); // reader;

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::Update

// This method can be called via MVRObserver class when Button Panel needs 

// to be updated. 

// ---------------------------------------------------------------------------

//	

void CVRButtonPanel::Update( TVRUpdateCommand aCommand )

	{

	TBool drawNow( ETrue );

	// Recorder calls this after each tick, we have to check if button reset

	// is needed. Redraw is needed also after 1 secs playback to enable

	// rewind button.

    switch( aCommand )

        {

        case EVRUpdate1Second:

	case EVRUpdate:

        case EVRUpdateStateChange:

            {

            // Redraw

           	drawNow = ETrue;

            break;

            }

        case EVRUpdatePositionChange:

        	{

			// Skip redraw

			drawNow = EFalse;

            break;

            }    

        default:

            {

            // Skip redraw

            drawNow = EFalse;

            return;

            }

        }

	if ( iModel->ResetNeeded() )

		{

		iFocusedButton = iModel->InitialFocusButtonId();

		}

	UpdateButtons();

	// Change focus if focused button is dimmed

	TuneButtonFocus();

	if ( drawNow )	

		{

	    DrawNow();				

		}

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::SizeChanged

// Called when Button Panel layout needs to be updated 

// ---------------------------------------------------------------------------

//	

void CVRButtonPanel::SizeChanged()

	{

    TInt count( iModel->ButtonCount() );

    TSize size; // Size of the bitmap

    for ( TInt i( 0 ); i < count; i++ )

		{

		// Layout button.

        TAknWindowLineLayout cell = AppLayout::cell_vorec_pane( i );

    	TAknLayoutRect buttonLayout;

		buttonLayout.LayoutRect( Rect(), cell );

		TRect buttonRect = buttonLayout.Rect();

		TInt newSize = (TInt)(buttonRect.Width() * 0.1); // used to reduce the size of button

		buttonRect.Shrink( TSize(newSize,newSize) );

    	iVRButtons.At( i )->SetRect( buttonRect );

   		} 

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::OfferKeyEventL

// Key event handling

// ---------------------------------------------------------------------------

//	

TKeyResponse CVRButtonPanel::OfferKeyEventL( const TKeyEvent& aKeyEvent,

											 TEventCode aType )

	{

	if ( aType != EEventKey )

		{

		if( aType == EEventKeyDown )

			{

			// Rocker key pressed

			if ( aKeyEvent.iScanCode == EStdKeyDevice3 )

				{

				// Start timer to get continuous timercallbacks for 

				// FastForwarding and FastRewinding

				StartTimerL();

				}

			}	

		else if( aType == EEventKeyUp )

			{

			// Rocker key pressed

			if ( aKeyEvent.iScanCode == EStdKeyDevice3 )

				{

				StopTimer();

				}

			}			

		return EKeyWasNotConsumed;

		}

	// EEventKey

	switch ( aKeyEvent.iCode )

		{

		case EKeyDownArrow:

			{

			MoveFocus( EFocusDown, ETrue );

			break;

			}

		case EKeyUpArrow:

			{

			MoveFocus( EFocusUp, ETrue );

			break;

			}

		case EKeyEnter:	

		case EKeyOK:

			{	

			// This is in use as long as there are only 2 CBA buttons. When MSK

			// enabled, execution goes straight to CVRRecView::HandleCommandL

			FetchAndSendCommandL();

			break;

			}

		default:

			{

			return EKeyWasNotConsumed;

			}

		}

	return EKeyWasConsumed;

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::Draw

// Needed to get correct focus drawing with AknButtons

// ---------------------------------------------------------------------------

//		

void CVRButtonPanel::Draw( CWindowGc& /*aGc*/, const CCoeControl& /*aControl*/, 

		const TRect& /*aRect*/ ) const

	{

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::Draw

// 

// ---------------------------------------------------------------------------

//		

void CVRButtonPanel::Draw( const TRect& /*aRect*/ ) const

	{

	CWindowGc& gc = SystemGc();

	// Acquire the control context through the MOP-chain

	MAknsControlContext* context = AknsDrawUtils::ControlContext( this );

	// Draw the background using the control context

	// Note: if there is no skin, the background is just cleared

	// (which is OK for us)

	AknsDrawUtils::Background( iSkin, context, this, gc, Rect() );

	// Draw button highlight

	DrawFocus( gc );

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::CountComponentControls

// 

// ---------------------------------------------------------------------------

//	

TInt CVRButtonPanel::CountComponentControls() const

	{

	return iVRButtons.Count();

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::ComponentControl

// 

// ---------------------------------------------------------------------------

//	

CCoeControl* CVRButtonPanel::ComponentControl( TInt aIndex ) const

	{

	return iVRButtons.At( aIndex );

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::MoveFocus

// Moves the focus to next button up or down. aDirection tells the which.

// ---------------------------------------------------------------------------

//	

void CVRButtonPanel::MoveFocus( const TFocusChange aDirection, TBool aDrawNow )

	{

	TInt buttonCount( iModel->ButtonCount() );

	TInt newButton( iFocusedButton );

	for ( TInt i( 0 ); i < buttonCount; i++ )

		{

		// calculate new button id. the modulo operator (%) handles looping

		newButton = ( newButton + aDirection + buttonCount ) % buttonCount;

		// dimmed buttons are skipped

		if ( iModel->ButtonState( newButton ) != EDimmed )

			{

			iFocusedButton = newButton;

			// Timer is used for FastForward/-Rewind. Stop that when focus is 

			// changed.

			StopTimer();

			break;

			}

		}

	if ( aDrawNow )

		{

		DrawNow();	

		}

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::UpdateLayoutL

// 

// ---------------------------------------------------------------------------

//	

void CVRButtonPanel::UpdateLayoutL( )

	{

	SizeChanged();

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::HandleResourceChangeL

// 

// ---------------------------------------------------------------------------

//	

void CVRButtonPanel::HandleResourceChangeL( TInt aType )

	{

	CCoeControl::HandleResourceChange( aType );

	if ( aType == KEikDynamicLayoutVariantSwitch )

		{

		UpdateLayoutL();

		}

	else if ( aType == KAknsMessageSkinChange )

		{

		// New skin instance is loaded

		iSkin = AknsUtils::SkinInstance();

		}

	// Inform Avkon Buttons		

	for( TInt buttonIndex = 0; buttonIndex < iVRButtons.Count() ; 

			buttonIndex++ )

		{

		iVRButtons.At( buttonIndex )->HandleResourceChange( aType );

		}

	}

// ---------------------------------------------------------------------------

// CVRButtonPanel::UpdateButtons

// Updates all Button Panel buttons to correct visual state. Also few  

// exceptional cases are handled here (1. clip position is at the beginning 

// 2. clip position is at the end)

// ---------------------------------------------------------------------------

//		

void CVRButtonPanel::UpdateButtons()

	{

	TUint stateId;

	// Update all the buttons	

	for( TInt buttonIndex = 0; buttonIndex < iVRButtons.Count() ; 

			buttonIndex++ )

		{

		stateId = iModel->VisualStateId();

		// dim rewind button if there is nothing to rewind

		if ( buttonIndex == EButtonRewind && 

				iModel->ButtonState( buttonIndex ) == EDimmed )

			{

			iVRButtons.At( buttonIndex )->SetDimmed(ETrue);			

			stateId = EStateDisableButtons;

			}

		if ( buttonIndex == EButtonRewind && 

				iModel->ButtonState( buttonIndex ) != EDimmed )

			{

			iVRButtons.At( buttonIndex )->SetDimmed(EFalse);			

			}

		// dim forward button if there is nothing to forward

		if( buttonIndex == EButtonForward && 

				iModel->ButtonState( buttonIndex ) == EDimmed )

			{

			iVRButtons.At( buttonIndex )->SetDimmed(ETrue);		

			stateId = EStateDisableButtons;	

			}

		if( buttonIndex == EButtonForward && 

				iModel->ButtonState( buttonIndex ) != EDimmed )

			{

			iVRButtons.At( buttonIndex )->SetDimmed(EFalse);		

			}

		// ************ADDED CODE STARTS****************************

		if( buttonIndex == EButtonRecord && 

				iModel->ButtonState( buttonIndex ) == EDimmed )

			{								

			stateId = EStateDisableButtons;	

			}

		// ************ADDED CODE ENDS******************************

		if( iModel->ButtonState( buttonIndex ) == EDimmed )

			{

			iVRButtons.At( buttonIndex )->SetDimmed(ETrue);		

			}

		else

			{

			iVRButtons.At( buttonIndex )->SetDimmed(EFalse);	

			}	

		// Change the button state, don't redraw

		iVRButtons.At( buttonIndex )->SetCurrentState( stateId , EFalse );

		}

	}	

// ---------------------------------------------------------------------------

// CVRButtonPanel::DrawFocus() 

// Draws the focus rectangle around the currently focused button

// ---------------------------------------------------------------------------

//    

void CVRButtonPanel::DrawFocus( CWindowGc& aGc ) const

	{

	aGc.SetBrushStyle( CGraphicsContext::ENullBrush );

	if ( AknLayoutUtils::ScalableLayoutInterfaceAvailable() )

		{

		// From LAF-table

//		TAknWindowLineLayout area = 

//			AknLayoutScalable_Apps::grid_highlight_pane_cp05().LayoutLine();

//		TRect buttonRect = iVRButtons.At( iFocusedButton )->Rect();

		TAknWindowLineLayout area = AppLayout::cell_vorec_pane( iFocusedButton );

		TAknLayoutRect layoutRect;

		layoutRect.LayoutRect( Rect(), area );

//		layoutRect.LayoutRect( buttonRect, area );

		// The outer rectangle is calculated from the layoutRect

		TRect outerRect = TRect( layoutRect.Rect().iTl, layoutRect.Rect().iBr );

		// Inner rectangle is generated by shrinking the outer rect.

		TRect innerRect = outerRect;

		innerRect.Shrink( TSize( KVRAmountOfFocusShrink, 

									KVRAmountOfFocusShrink ) );