window.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

void wxWindowMac::Init()
{
    m_peer = NULL ;
    m_frozenness = 0 ;
    m_macAlpha = 255 ;

#if WXWIN_COMPATIBILITY_2_4
    m_backgroundTransparent = false;
#endif

#if wxMAC_USE_CORE_GRAPHICS
    m_cgContextRef = NULL ;
#endif

    // as all windows are created with WS_VISIBLE style...
    m_isShown = true;

    m_hScrollBar = NULL ;
    m_vScrollBar = NULL ;
    m_macBackgroundBrush = wxNullBrush ;

    m_macIsUserPane = true;
    m_clipChildren = false ;
    m_cachedClippedRectValid = false ;

    // we need a valid font for the encodings
    wxWindowBase::SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
}

wxWindowMac::~wxWindowMac()
{
    SendDestroyEvent();

    m_isBeingDeleted = true;

    MacInvalidateBorders() ;

#ifndef __WXUNIVERSAL__
    // VS: make sure there's no wxFrame with last focus set to us:
    for ( wxWindow *win = GetParent(); win; win = win->GetParent() )
    {
        wxFrame *frame = wxDynamicCast(win, wxFrame);
        if ( frame )
        {
            if ( frame->GetLastFocus() == this )
                frame->SetLastFocus((wxWindow*)NULL);
            break;
        }
    }
#endif

    // destroy children before destroying this window itself
    DestroyChildren();

    // wxRemoveMacControlAssociation( this ) ;
    // If we delete an item, we should initialize the parent panel,
    // because it could now be invalid.
    wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
    if ( tlw )
    {
        if ( tlw->GetDefaultItem() == (wxButton*) this)
            tlw->SetDefaultItem(NULL);
    }

    if ( m_peer && m_peer->Ok() )
    {
        // in case the callback might be called during destruction
        wxRemoveMacControlAssociation( this) ;
        ::RemoveEventHandler( (EventHandlerRef ) m_macControlEventHandler ) ;
        // we currently are not using this hook
        // ::SetControlColorProc( *m_peer , NULL ) ;
        m_peer->Dispose() ;
    }

    if ( g_MacLastWindow == this )
        g_MacLastWindow = NULL ;

    wxFrame* frame = wxDynamicCast( wxGetTopLevelParent( this ) , wxFrame ) ;
    if ( frame )
    {
        if ( frame->GetLastFocus() == this )
            frame->SetLastFocus( NULL ) ;
    }

    // delete our drop target if we've got one
#if wxUSE_DRAG_AND_DROP
    if ( m_dropTarget != NULL )
    {
        delete m_dropTarget;
        m_dropTarget = NULL;
    }
#endif

    delete m_peer ;
}

WXWidget wxWindowMac::GetHandle() const
{
    return (WXWidget) m_peer->GetControlRef() ;
}

void wxWindowMac::MacInstallEventHandler( WXWidget control )
{
    wxAssociateControlWithMacControl( (ControlRef) control , this ) ;
    InstallControlEventHandler( (ControlRef)control , GetwxMacWindowEventHandlerUPP(),
        GetEventTypeCount(eventList), eventList, this,
        (EventHandlerRef *)&m_macControlEventHandler);

#if !TARGET_API_MAC_OSX
    if ( (ControlRef) control == m_peer->GetControlRef() )
    {
        m_peer->SetData<ControlUserPaneDrawUPP>(kControlEntireControl, kControlUserPaneDrawProcTag, GetwxMacControlUserPaneDrawProc()) ;
        m_peer->SetData<ControlUserPaneHitTestUPP>(kControlEntireControl, kControlUserPaneHitTestProcTag, GetwxMacControlUserPaneHitTestProc()) ;
        m_peer->SetData<ControlUserPaneTrackingUPP>(kControlEntireControl, kControlUserPaneTrackingProcTag, GetwxMacControlUserPaneTrackingProc()) ;
        m_peer->SetData<ControlUserPaneIdleUPP>(kControlEntireControl, kControlUserPaneIdleProcTag, GetwxMacControlUserPaneIdleProc()) ;
        m_peer->SetData<ControlUserPaneKeyDownUPP>(kControlEntireControl, kControlUserPaneKeyDownProcTag, GetwxMacControlUserPaneKeyDownProc()) ;
        m_peer->SetData<ControlUserPaneActivateUPP>(kControlEntireControl, kControlUserPaneActivateProcTag, GetwxMacControlUserPaneActivateProc()) ;
        m_peer->SetData<ControlUserPaneFocusUPP>(kControlEntireControl, kControlUserPaneFocusProcTag, GetwxMacControlUserPaneFocusProc()) ;
        m_peer->SetData<ControlUserPaneBackgroundUPP>(kControlEntireControl, kControlUserPaneBackgroundProcTag, GetwxMacControlUserPaneBackgroundProc()) ;
    }
#endif
}

// Constructor
bool wxWindowMac::Create(wxWindowMac *parent,
    wxWindowID id,
    const wxPoint& pos,
    const wxSize& size,
    long style,
    const wxString& name)
{
    wxCHECK_MSG( parent, false, wxT("can't create wxWindowMac without parent") );

    if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
        return false;

    m_windowVariant = parent->GetWindowVariant() ;

    if ( m_macIsUserPane )
    {
        Rect bounds = wxMacGetBoundsForControl( this , pos , size ) ;

        UInt32 features = 0
            | kControlSupportsEmbedding
            | kControlSupportsLiveFeedback
            | kControlGetsFocusOnClick
//            | kControlHasSpecialBackground
//            | kControlSupportsCalcBestRect
            | kControlHandlesTracking
            | kControlSupportsFocus
            | kControlWantsActivate
            | kControlWantsIdle ;

        m_peer = new wxMacControl(this) ;
        OSStatus err =::CreateUserPaneControl( MAC_WXHWND(GetParent()->MacGetTopLevelWindowRef()) , &bounds, features , m_peer->GetControlRefAddr() );
        verify_noerr( err );

        MacPostControlCreate(pos, size) ;
    }

#ifndef __WXUNIVERSAL__
    // Don't give scrollbars to wxControls unless they ask for them
    if ( (! IsKindOf(CLASSINFO(wxControl)) && ! IsKindOf(CLASSINFO(wxStatusBar)))
         || (IsKindOf(CLASSINFO(wxControl)) && ((style & wxHSCROLL) || (style & wxVSCROLL))))
    {
        MacCreateScrollBars( style ) ;
    }
#endif

    wxWindowCreateEvent event(this);
    GetEventHandler()->AddPendingEvent(event);

    return true;
}

void wxWindowMac::MacChildAdded()
{
    if ( m_vScrollBar )
        m_vScrollBar->Raise() ;
    if ( m_hScrollBar )
        m_hScrollBar->Raise() ;
}

void wxWindowMac::MacPostControlCreate(const wxPoint& pos, const wxSize& size)
{
    wxASSERT_MSG( m_peer != NULL && m_peer->Ok() , wxT("No valid mac control") ) ;

    m_peer->SetReference( (URefCon) this ) ;
    GetParent()->AddChild( this );

    MacInstallEventHandler( (WXWidget) m_peer->GetControlRef() );

    ControlRef container = (ControlRef) GetParent()->GetHandle() ;
    wxASSERT_MSG( container != NULL , wxT("No valid mac container control") ) ;
    ::EmbedControl( m_peer->GetControlRef() , container ) ;
    GetParent()->MacChildAdded() ;

    // adjust font, controlsize etc
    DoSetWindowVariant( m_windowVariant ) ;

    m_peer->SetLabel( wxStripMenuCodes(m_label, wxStrip_Mnemonics) ) ;

    if (!m_macIsUserPane)
        SetInitialSize(size);

    SetCursor( *wxSTANDARD_CURSOR ) ;
}

void wxWindowMac::DoSetWindowVariant( wxWindowVariant variant )
{
    // Don't assert, in case we set the window variant before
    // the window is created
    // wxASSERT( m_peer->Ok() ) ;

    m_windowVariant = variant ;

    if (m_peer == NULL || !m_peer->Ok())
        return;

    ControlSize size ;
    ThemeFontID themeFont = kThemeSystemFont ;

    // we will get that from the settings later
    // and make this NORMAL later, but first
    // we have a few calculations that we must fix

    switch ( variant )
    {
        case wxWINDOW_VARIANT_NORMAL :
            size = kControlSizeNormal;
            themeFont = kThemeSystemFont ;
            break ;

        case wxWINDOW_VARIANT_SMALL :
            size = kControlSizeSmall;
            themeFont = kThemeSmallSystemFont ;
            break ;

        case wxWINDOW_VARIANT_MINI :
           if (UMAGetSystemVersion() >= 0x1030 )
            {
                // not always defined in the headers
                size = 3 ;
                themeFont = 109 ;
            }
            else
            {
                size = kControlSizeSmall;
                themeFont = kThemeSmallSystemFont ;
            }
            break ;

        case wxWINDOW_VARIANT_LARGE :
            size = kControlSizeLarge;
            themeFont = kThemeSystemFont ;
            break ;

        default:
            wxFAIL_MSG(_T("unexpected window variant"));
            break ;
    }

    m_peer->SetData<ControlSize>(kControlEntireControl, kControlSizeTag, &size ) ;

    wxFont font ;
    font.MacCreateThemeFont( themeFont ) ;
    SetFont( font ) ;
}

void wxWindowMac::MacUpdateControlFont()
{
    m_peer->SetFont( GetFont() , GetForegroundColour() , GetWindowStyle() ) ;
    Refresh() ;
}

bool wxWindowMac::SetFont(const wxFont& font)
{
    bool retval = wxWindowBase::SetFont( font );

    MacUpdateControlFont() ;

    return retval;
}

bool wxWindowMac::SetForegroundColour(const wxColour& col )
{
    bool retval = wxWindowBase::SetForegroundColour( col );

    if (retval)
        MacUpdateControlFont();

    return retval;
}

bool wxWindowMac::SetBackgroundColour(const wxColour& col )
{
    if ( !wxWindowBase::SetBackgroundColour(col) && m_hasBgCol )
        return false ;

    wxBrush brush ;
    wxColour newCol(GetBackgroundColour());

    if ( newCol == wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW ) )
        brush.MacSetTheme( kThemeBrushDocumentWindowBackground ) ;
    else if ( newCol == wxSystemSettings::GetColour( wxSYS_COLOUR_3DFACE ) )
        brush.MacSetTheme( kThemeBrushDialogBackgroundActive ) ;
    else
        brush.SetColour( newCol ) ;

    MacSetBackgroundBrush( brush ) ;
    MacUpdateControlFont() ;

    return true ;
}

void wxWindowMac::MacSetBackgroundBrush( const wxBrush &brush )
{
    m_macBackgroundBrush = brush ;
    m_peer->SetBackground( brush ) ;
}

bool wxWindowMac::MacCanFocus() const
{
    // TODO : evaluate performance hits by looking up this value, eventually cache the results for a 1 sec or so
    // CAUTION : the value returned currently is 0 or 2, I've also found values of 1 having the same meaning,
    // but the value range is nowhere documented
    Boolean keyExistsAndHasValidFormat ;
    CFIndex fullKeyboardAccess = CFPreferencesGetAppIntegerValue( CFSTR("AppleKeyboardUIMode" ) ,
        kCFPreferencesCurrentApplication, &keyExistsAndHasValidFormat );

    if ( keyExistsAndHasValidFormat && fullKeyboardAccess > 0 )
    {
        return true ;
    }
    else
    {
        UInt32 features = 0 ;
        m_peer->GetFeatures( &features ) ;

        return features & ( kControlSupportsFocus | kControlGetsFocusOnClick ) ;
    }
}

void wxWindowMac::SetFocus()
{
    if ( !AcceptsFocus() )
            return ;

    wxWindow* former = FindFocus() ;
    if ( former == this )
        return ;

    // as we cannot rely on the control features to find out whether we are in full keyboard mode,
    // we can only leave in case of an error
    OSStatus err = m_peer->SetFocus( kControlFocusNextPart ) ;
    if ( err == errCouldntSetFocus )
        return ;

    SetUserFocusWindow( (WindowRef)MacGetTopLevelWindowRef() );

#if !TARGET_API_MAC_OSX
    // emulate carbon events when running under CarbonLib where they are not natively available
    if ( former )
    {
        EventRef evRef = NULL ;

        err = MacCreateEvent(
            NULL , kEventClassControl , kEventControlSetFocusPart , TicksToEventTime( TickCount() ) ,
            kEventAttributeUserEvent , &evRef );
        verify_noerr( err );

        wxMacCarbonEvent cEvent( evRef ) ;
        cEvent.SetParameter<ControlRef>( kEventParamDirectObject , (ControlRef) former->GetHandle() ) ;
        cEvent.SetParameter<ControlPartCode>(kEventParamControlPart , typeControlPartCode , kControlFocusNoPart ) ;

        wxMacWindowEventHandler( NULL , evRef , former ) ;
        ReleaseEvent( evRef ) ;
    }

    // send new focus event
    {
        EventRef evRef = NULL ;

        err = MacCreateEvent(
            NULL , kEventClassControl , kEventControlSetFocusPart , TicksToEventTime( TickCount() ) ,
            kEventAttributeUserEvent , &evRef );
        verify_noerr( err );

        wxMacCarbonEvent cEvent( evRef ) ;
        cEvent.SetParameter<ControlRef>( kEventParamDirectObject , (ControlRef) GetHandle() ) ;
        cEvent.SetParameter<ControlPartCode>(kEventParamControlPart , typeControlPartCode , kControlFocusNextPart ) ;

        wxMacWindowEventHandler( NULL , evRef , this ) ;
        ReleaseEvent( evRef ) ;
    }
#endif
}

void wxWindowMac::DoCaptureMouse()
{
    wxApp::s_captureWindow = this ;
}

wxWindow * wxWindowBase::GetCapture()
{
    return wxApp::s_captureWindow ;
}

void wxWindowMac::DoReleaseMouse()
{
    wxApp::s_captureWindow = NULL ;
}

#if wxUSE_DRAG_AND_DROP

void wxWindowMac::SetDropTarget(wxDropTarget *pDropTarget)
{
    if ( m_dropTarget != NULL )
        delete m_dropTarget;

    m_dropTarget = pDropTarget;
    if ( m_dropTarget != NULL )
    {
        // TODO:
    }
}

#endif

// Old-style File Manager Drag & Drop
void wxWindowMac::DragAcceptFiles(bool accept)
{
    // TODO:
}

// Returns the size of the native control. In the case of the toplevel window
// this is the content area root control

void wxWindowMac::MacGetPositionAndSizeFromControl(int& x, int& y,
                                           int& w, int& h) const
{
    wxFAIL_MSG( wxT("Not currently supported") ) ;
}

// From a wx position / size calculate the appropriate size of the native control

bool wxWindowMac::MacGetBoundsForControl(