combobox.cpp

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

    const wxPoint& pos,
    const wxSize& size,
    const wxArrayString& choices,
    long style,
    const wxValidator& validator,
    const wxString& name)
{
    wxCArrayString chs( choices );

    return Create( parent, id, value, pos, size, chs.GetCount(),
                   chs.GetStrings(), style, validator, name );
}

bool wxComboBox::Create(wxWindow *parent,
    wxWindowID id,
    const wxString& value,
    const wxPoint& pos,
    const wxSize& size,
    int n,
    const wxString choices[],
    long style,
    const wxValidator& validator,
    const wxString& name)
{
    if ( !wxControl::Create(parent, id, wxDefaultPosition, wxDefaultSize, style ,
                            validator, name) )
    {
        return false;
    }

    m_choice = new wxComboBoxChoice(this, style );
    wxSize csize = size;
    if ( style & wxCB_READONLY )
    {
        m_text = NULL;
    }
    else
    {
        m_text = new wxComboBoxText(this);
        if ( size.y == -1 )
        {
            csize.y = m_text->GetSize().y ;
            csize.y += 2 * TEXTFOCUSBORDER ;
        }
    }

    DoSetSize(pos.x, pos.y, csize.x, csize.y);

    for ( int i = 0 ; i < n ; i++ )
    {
        m_choice->DoAppend( choices[ i ] );
    }

    // Needed because it is a wxControlWithItems
    SetInitialSize(size);
    SetStringSelection(value);

    return true;
}

wxString wxComboBox::GetValue() const
{
    wxString        result;

    if ( m_text == NULL )
        result = m_choice->GetString( m_choice->GetSelection() );
    else
        result = m_text->GetValue();

    return result;
}

unsigned int wxComboBox::GetCount() const
{
    return m_choice->GetCount() ;
}

void wxComboBox::SetValue(const wxString& value)
{
    if ( HasFlag(wxCB_READONLY) )
        SetStringSelection( value ) ;
    else
        m_text->SetValue( value );
}

// Clipboard operations

void wxComboBox::Copy()
{
    if ( m_text != NULL )
        m_text->Copy();
}

void wxComboBox::Cut()
{
    if ( m_text != NULL )
        m_text->Cut();
}

void wxComboBox::Paste()
{
    if ( m_text != NULL )
        m_text->Paste();
}

void wxComboBox::SetEditable(bool editable)
{
    if ( ( m_text == NULL ) && editable )
    {
        m_text = new wxComboBoxText( this );
    }
    else if ( ( m_text != NULL ) && !editable )
    {
        delete m_text;
        m_text = NULL;
    }

    int currentX, currentY;
    GetPosition( &currentX, &currentY );

    int currentW, currentH;
    GetSize( &currentW, &currentH );

    DoMoveWindow( currentX, currentY, currentW, currentH );
}

void wxComboBox::SetInsertionPoint(long pos)
{
    if ( m_text )
        m_text->SetInsertionPoint(pos);
}

void wxComboBox::SetInsertionPointEnd()
{
    if ( m_text )
        m_text->SetInsertionPointEnd();
}

long wxComboBox::GetInsertionPoint() const
{
    if ( m_text )
        return m_text->GetInsertionPoint();
    return 0;
}

wxTextPos wxComboBox::GetLastPosition() const
{
    if ( m_text )
        return m_text->GetLastPosition();
    return 0;
}

void wxComboBox::Replace(long from, long to, const wxString& value)
{
    if ( m_text )
        m_text->Replace(from,to,value);
}

void wxComboBox::Remove(long from, long to)
{
    if ( m_text )
        m_text->Remove(from,to);
}

void wxComboBox::SetSelection(long from, long to)
{
    if ( m_text )
        m_text->SetSelection(from,to);
}

int wxComboBox::DoAppend(const wxString& item)
{
    return m_choice->DoAppend( item ) ;
}

int wxComboBox::DoInsert(const wxString& item, unsigned int pos)
{
    return m_choice->DoInsert( item , pos ) ;
}

void wxComboBox::DoSetItemClientData(unsigned int n, void* clientData)
{
    return m_choice->DoSetItemClientData( n , clientData ) ;
}

void* wxComboBox::DoGetItemClientData(unsigned int n) const
{
    return m_choice->DoGetItemClientData( n ) ;
}

void wxComboBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
{
    return m_choice->DoSetItemClientObject(n, clientData);
}

wxClientData* wxComboBox::DoGetItemClientObject(unsigned int n) const
{
    return m_choice->DoGetItemClientObject( n ) ;
}

void wxComboBox::FreeData()
{
    if ( HasClientObjectData() )
    {
        unsigned int count = GetCount();
        for ( unsigned int n = 0; n < count; n++ )
        {
            SetClientObject( n, NULL );
        }
    }
}

void wxComboBox::Delete(unsigned int n)
{
    // force client object deletion
    if( HasClientObjectData() )
        SetClientObject( n, NULL );
    m_choice->Delete( n );
}

void wxComboBox::Clear()
{
    FreeData();
    m_choice->Clear();
}

int wxComboBox::GetSelection() const
{
    return m_choice->GetSelection();
}

void wxComboBox::SetSelection(int n)
{
    m_choice->SetSelection( n );

    if ( m_text != NULL )
        m_text->SetValue(GetString(n));
}

int wxComboBox::FindString(const wxString& s, bool bCase) const
{
    return m_choice->FindString( s, bCase );
}

wxString wxComboBox::GetString(unsigned int n) const
{
    return m_choice->GetString( n );
}

wxString wxComboBox::GetStringSelection() const
{
    int sel = GetSelection();
    if (sel != wxNOT_FOUND)
        return wxString(this->GetString((unsigned int)sel));
    else
        return wxEmptyString;
}

void wxComboBox::SetString(unsigned int n, const wxString& s)
{
    m_choice->SetString( n , s );
}

bool wxComboBox::IsEditable() const
{
    return m_text != NULL && !HasFlag(wxCB_READONLY);
}

void wxComboBox::Undo()
{
    if (m_text != NULL)
        m_text->Undo();
}

void wxComboBox::Redo()
{
    if (m_text != NULL)
        m_text->Redo();
}

void wxComboBox::SelectAll()
{
    if (m_text != NULL)
        m_text->SelectAll();
}

bool wxComboBox::CanCopy() const
{
    if (m_text != NULL)
        return m_text->CanCopy();
    else
        return false;
}

bool wxComboBox::CanCut() const
{
    if (m_text != NULL)
        return m_text->CanCut();
    else
        return false;
}

bool wxComboBox::CanPaste() const
{
    if (m_text != NULL)
        return m_text->CanPaste();
    else
        return false;
}

bool wxComboBox::CanUndo() const
{
    if (m_text != NULL)
        return m_text->CanUndo();
    else
        return false;
}

bool wxComboBox::CanRedo() const
{
    if (m_text != NULL)
        return m_text->CanRedo();
    else
        return false;
}

wxInt32 wxComboBox::MacControlHit( WXEVENTHANDLERREF WXUNUSED(handler) , WXEVENTREF WXUNUSED(event) )
{
/*
    For consistency with other platforms, clicking in the text area does not constitute a selection
    wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, m_windowId );
    event.SetInt(GetSelection());
    event.SetEventObject(this);
    event.SetString(GetStringSelection());
    ProcessCommand(event);
*/

    return noErr ;
}

#endif // wxUSE_COMBOBOX