chxavviewbase.cpp

symbian 下的helix player源代码

/************************************************************************
 * chxavviewbase.cpp
 * -----------------
 *
 * Synopsis:
 * Contains the somewhat empty implementation of the CHXAvViewBase class.
 * This is the base class of all views in this app.
 *
 * Target:
 * Symbian OS
 *
 *
 * (c) 1995-2003 RealNetworks, Inc. Patents pending. All rights reserved.
 *
 ************************************************************************/

// Includes...
#include <aknenv.h>
#include <aknview.h>
#include <aknconsts.h>
#include <akntitle.h>
#include <aknnavide.h>
#include <akncontext.h>
#include <eikspane.h>
#include <coecntrl.h>
#include <aknviewappui.h> 
#include <barsread.h>

// Includes from this project...
#include "hxsym_debug.h"
#include "hxsym_leaveutil.h"
#include "chxavviewbase.h"
#include "chxavplayerui.h"



/* 
 * CHXAvViewBase
 * -------------
 * Constructor.   
 *
 */
CHXAvViewBase::CHXAvViewBase(TInt viewIndex, CHXAvPlayerUI *playerUI) 
: m_viewIndex(viewIndex)
, m_playerUI(playerUI)
, m_backViewIndex(-1)
, m_bFirstForegroundEventPending(true)
{

    DPRINTF(SYMP_INFO, ("CHXAvViewBase::Ctor(): id = %d\n", m_viewIndex));

    // status pane: container of other panes
    m_statusPane = StatusPane();

    // info area: used for tabs, volume control, etc.
    m_naviPane 
	= static_cast<CAknNavigationControlContainer*>(
	m_statusPane->ControlL(TUid::Uid(EEikStatusPaneUidNavi)));

    // app bitmap pane
    m_contextPane 
	 = static_cast<CAknContextPane*>(
	 m_statusPane->ControlL(TUid::Uid(EEikStatusPaneUidContext)));

    // app title pane
    m_titlePane  
	= static_cast<CAknTitlePane*>(
	m_statusPane->ControlL(TUid::Uid(EEikStatusPaneUidTitle)));
}


/*
 * ~CHXAvViewBase
 * --------------
 * Destructor.
 *
 */
CHXAvViewBase::~CHXAvViewBase()
{
    DPRINTF(SYMP_INFO, ("CHXAvViewBase::Dtor(): id = %d\n", m_viewIndex));
}



/*
 * ConstructL
 * ----------
 * default do-nothing implementation for override
 *
 */
void CHXAvViewBase::ConstructL()
{
}



/* 
 * UpdateViewStateL
 * ----------------
 * default do-nothing implementation for override
 *
 */
void CHXAvViewBase::UpdateViewStateL()
{
}



/*
 * HandleLosePlayFocus
 * ------------------
 * default do-nothing implementation for override
 *
 */
void CHXAvViewBase::HandleLosePlayFocus()
{
}


/*
 * CAknView::HandleForegroundEventL
 * ------------------
 *
 * Called after DoActivate() for new view and before DoDeactivate() for old view when 
 * switching among our own views. Also called when gaining or losing app focus.
 *
 */
void CHXAvViewBase::HandleForegroundEventL(TBool bEnterForeground)
{
    DPRINTF(SYMP_INFO, ("avPlayerAppViewBase::HandleForegroundEventL() enter_foreground = %d\n", bEnterForeground));

    CAknView::HandleForegroundEventL(bEnterForeground);
    if( bEnterForeground )
    {
        UpdateViewStateL(); 

        if( m_bFirstForegroundEventPending )
        {
            m_bFirstForegroundEventPending = false;
            m_playerUI->OnViewForegroundActivateL(m_viewIndex);
        }
    }
}

///////////////////////////////////
// called when we show or hide status pane
void CHXAvViewBase::HandleStatusPaneSizeChange()
{
    if(m_window)
    {
	m_window->SetRect(ClientRect());
	m_window->DrawNow();
    }
}

/* 
 * Id
 * --
 * Return our id.
 *
 */
TUid CHXAvViewBase::Id() const
{
    return TUid::Uid(m_viewIndex);
}




/* 
 * DoActivateL
 * -----------
 * Called when the view is activating
 *
 * After this we expect following sequence of events
 *  1) get foreground event for the new view
 *  2) get loss of foreground event for old view
 *  3) DoDeactivate() called for old view
 *
 */
void CHXAvViewBase::DoActivateL(const TVwsViewId& prevViewID, TUid customMsgID, const TDesC8& customMsg)
{
    m_bFirstForegroundEventPending = true;

    // create window and add to stack first
    m_window = CreateViewWindowForActivatingViewL();
    HX_ASSERT(m_window);
    m_window->SetMopParent(this);
   
    // note: view state is updated when foreground event occurs
    m_window->ActivateL();
    m_window->MakeVisible(ETrue);

    AppUi()->AddToStackL(*this, m_window);

    FinishViewActivateL();

}



/*
 * DoDeactivate
 * ------------
 * Call subclasses to handle their cleanup on leaving to a new view or exiting.
 *
 * This is called after DoActivate() for new view
 *
 */
void CHXAvViewBase::DoDeactivate()
{

    DPRINTF(SYMP_INFO, ("CHXAvViewBase::DoDeactivate(): for view = %d\n", m_viewIndex));

    HX_ASSERT(m_window);
    if( m_window )
    {
	AppUi()->RemoveFromStack(m_window);
    }
    
    // derived: do view window cleanup (possibly)
    FinishViewDeactivateL();

    // may or may not be valid from now on (typically derived views free this on each deactivation)
    m_window = 0;

}

/*
 * FinishViewActivateL
 * ------------------
 * default do-nothing implementation for override
 *
 */
void CHXAvViewBase::FinishViewActivateL()
{
}


/*
 * HandleCommandL
 * --------------
 * Handle the command by passing it the UI.
 *
 */
void CHXAvViewBase::HandleCommandL(TInt command)
{
    m_playerUI->HandleCommandL(command);
}

////////////////////////////////////////
//
void CHXAvViewBase::ClosePopupMenu()
{
    if( m_pMenuPopup )
    {
        m_pMenuPopup->StopDisplayingMenuBar();
        AppUi()->RemoveFromViewStack(*this, m_pMenuPopup.Ptr());
        m_pMenuPopup = 0;
    }
}

////////////////////////////////////////
//
void CHXAvViewBase::ShowPopupMenuL(TInt idRes)
{
    ClosePopupMenu();
    m_pMenuPopup = new(ELeave) CEikMenuBar;
    TRAPD( err, ShowPopupMenuHelperL(idRes) );
    if(err != KErrNone)
    {
        ClosePopupMenu();
        HXSYM_LEAVE(err);
    }
}

////////////////////////////////////////
//
void CHXAvViewBase::ShowPopupMenuHelperL(TInt idRes )
{
    m_pMenuPopup->ConstructL( this, 0, idRes );
    AppUi()->AddToViewStackL( *this, m_pMenuPopup.Ptr(), ECoeStackPriorityMenu, ECoeStackFlagRefusesFocus );
    m_pMenuPopup->TryDisplayMenuBarL();
}


///////////////////////////////////
// calling CAknTitlePane::SetTextToDefaultL() results in title
// being set from long caption from caption resource; initially
// overridden app title is shown and that is what we really want
// to restore to
//
void CHXAvViewBase::SetDefaultAppTitleL()
{
    TResourceReader reader;
    iCoeEnv->CreateResourceReaderLC(reader, R_AVP_OVERRIDEN_APP_NAME);
    m_titlePane->SetFromResourceL(reader);
    CleanupStack::PopAndDestroy(); // reader
}

////////////////////////////////////////
// normally called when new view is activating
void CHXAvViewBase::RestoreDefaultNaviPaneL()
{
    m_naviPane->PushDefaultL();
}

////////////////////////////////////////
// hook to make menu go away
void CHXAvViewBase::ProcessCommandL(TInt cmd)
{
    ClosePopupMenu();
    CAknView::ProcessCommandL(cmd);
}