void CLibraryAlbumView::SelectTo(int nDelta)
{
if ( m_nCount == 0 ) return;
int nFocus = GetTrackIndex( m_pFocus );
if ( nFocus < 0 )
{
nFocus = 0;
}
else
{
nFocus += nDelta;
if ( nFocus < 0 ) nFocus = 0;
if ( nFocus >= m_nCount ) nFocus = m_nCount - 1;
}
if ( SelectTo( m_pList[ nFocus ] ) ) Invalidate();
}
BOOL CLibraryAlbumView::SelectTo(CLibraryAlbumTrack* pTrack)
{
BOOL bChanged = FALSE;
if ( pTrack )
{
m_pFocus = pTrack;
int nFirst = GetTrackIndex( m_pFirst );
int nFocus = GetTrackIndex( m_pFocus );
if ( GetAsyncKeyState( VK_CONTROL ) & 0x8000 )
{
bChanged = Select( m_pFocus, TRI_UNKNOWN );
}
else if ( GetAsyncKeyState( VK_SHIFT ) & 0x8000 )
{
bChanged = DeselectAll();
if ( nFirst >= 0 && nFocus >= 0 )
{
if ( nFirst <= nFocus )
{
for ( ; nFirst <= nFocus ; nFirst++ )
Select( m_pList[ nFirst ], TRI_TRUE );
}
else
{
for ( ; nFocus <= nFirst ; nFocus++ )
Select( m_pList[ nFocus ], TRI_TRUE );
}
bChanged = TRUE;
}
else
{
bChanged |= Select( m_pFocus, TRI_TRUE );
}
}
else
{
if ( m_pFocus->m_bSelected == FALSE )
bChanged = DeselectAll( m_pFocus );
bChanged |= Select( m_pFocus );
}
if ( m_nSelected == 1 && m_pFocus->m_bSelected ) m_pFirst = m_pFocus;
CRect rcClient, rcItem;
GetClientRect( &rcClient );
GetItemRect( m_pFocus, &rcItem );
if ( rcItem.top < rcClient.top + m_szTrack.cy )
ScrollBy( rcItem.top - rcClient.top - m_szTrack.cy );
else if ( rcItem.bottom > rcClient.bottom )
ScrollBy( rcItem.bottom - rcClient.bottom );
}
else if ( ( GetAsyncKeyState( VK_SHIFT ) & 0x8000 ) == 0 &&
( GetAsyncKeyState( VK_CONTROL ) & 0x8000 ) == 0 )
{
bChanged = DeselectAll();
}
if ( m_nSelected == 0 ) m_pFirst = NULL;
return bChanged;
}
