sizer.cpp

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bool wxSizer::Remove( wxSizer *sizer )
{
    wxASSERT_MSG( sizer, _T("Removing NULL sizer") );

    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if (item->GetSizer() == sizer)
        {
            delete item;
            m_children.Erase( node );
            return true;
        }

        node = node->GetNext();
    }

    return false;
}

bool wxSizer::Remove( int index )
{
    wxCHECK_MSG( index >= 0 && (size_t)index < m_children.GetCount(),
                 false,
                 _T("Remove index is out of range") );

    wxSizerItemList::compatibility_iterator node = m_children.Item( index );

    wxCHECK_MSG( node, false, _T("Failed to find child node") );

    wxSizerItem *item = node->GetData();

    if ( item->IsWindow() )
        item->GetWindow()->SetContainingSizer( NULL );

    delete item;
    m_children.Erase( node );
    return true;
}

bool wxSizer::Detach( wxSizer *sizer )
{
    wxASSERT_MSG( sizer, _T("Detaching NULL sizer") );

    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if (item->GetSizer() == sizer)
        {
            item->DetachSizer();
            delete item;
            m_children.Erase( node );
            return true;
        }
        node = node->GetNext();
    }

    return false;
}

bool wxSizer::Detach( wxWindow *window )
{
    wxASSERT_MSG( window, _T("Detaching NULL window") );

    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if (item->GetWindow() == window)
        {
            item->GetWindow()->SetContainingSizer( NULL );
            delete item;
            m_children.Erase( node );
            return true;
        }
        node = node->GetNext();
    }

    return false;
}

bool wxSizer::Detach( int index )
{
    wxCHECK_MSG( index >= 0 && (size_t)index < m_children.GetCount(),
                 false,
                 _T("Detach index is out of range") );

    wxSizerItemList::compatibility_iterator node = m_children.Item( index );

    wxCHECK_MSG( node, false, _T("Failed to find child node") );

    wxSizerItem *item = node->GetData();

    if ( item->IsSizer() )
        item->DetachSizer();
    else if ( item->IsWindow() )
        item->GetWindow()->SetContainingSizer( NULL );

    delete item;
    m_children.Erase( node );
    return true;
}

void wxSizer::Clear( bool delete_windows )
{
    // First clear the ContainingSizer pointers
    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if (item->IsWindow())
            item->GetWindow()->SetContainingSizer( NULL );
        node = node->GetNext();
    }

    // Destroy the windows if needed
    if (delete_windows)
        DeleteWindows();

    // Now empty the list
    WX_CLEAR_LIST(wxSizerItemList, m_children);
}

void wxSizer::DeleteWindows()
{
    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        item->DeleteWindows();
        node = node->GetNext();
    }
}

wxSize wxSizer::Fit( wxWindow *window )
{
    wxSize size(window->IsTopLevel() ? FitSize(window)
                                     : GetMinWindowSize(window));

    window->SetSize( size );

    return size;
}

void wxSizer::FitInside( wxWindow *window )
{
    wxSize size;
    if (window->IsTopLevel())
        size = VirtualFitSize( window );
    else
        size = GetMinClientSize( window );

    window->SetVirtualSize( size );
}

void wxSizer::Layout()
{
    // (re)calculates minimums needed for each item and other preparations
    // for layout
    CalcMin();

    // Applies the layout and repositions/resizes the items
    RecalcSizes();
}

void wxSizer::SetSizeHints( wxWindow *window )
{
    // Preserve the window's max size hints, but set the
    // lower bound according to the sizer calculations.

    wxSize size = Fit( window );

    window->SetSizeHints( size.x,
                          size.y,
                          window->GetMaxWidth(),
                          window->GetMaxHeight() );
}

void wxSizer::SetVirtualSizeHints( wxWindow *window )
{
    // Preserve the window's max size hints, but set the
    // lower bound according to the sizer calculations.

    FitInside( window );
    wxSize size( window->GetVirtualSize() );
    window->SetVirtualSizeHints( size.x,
                                 size.y,
                                 window->GetMaxWidth(),
                                 window->GetMaxHeight() );
}

wxSize wxSizer::GetMaxWindowSize( wxWindow *window ) const
{
    return window->GetMaxSize();
}

wxSize wxSizer::GetMinWindowSize( wxWindow *window )
{
    wxSize      minSize( GetMinSize() );
    wxSize      size( window->GetSize() );
    wxSize      client_size( window->GetClientSize() );

    return wxSize( minSize.x+size.x-client_size.x,
                   minSize.y+size.y-client_size.y );
}

// TODO on mac we need a function that determines how much free space this
// min size contains, in order to make sure that we have 20 pixels of free
// space around the controls

// Return a window size that will fit within the screens dimensions
wxSize wxSizer::FitSize( wxWindow *window )
{
    wxSize size     = GetMinWindowSize( window );
    wxSize sizeMax  = GetMaxWindowSize( window );

    // Limit the size if sizeMax != wxDefaultSize

    if ( size.x > sizeMax.x && sizeMax.x != wxDefaultCoord )
        size.x = sizeMax.x;
    if ( size.y > sizeMax.y && sizeMax.y != wxDefaultCoord )
        size.y = sizeMax.y;

    return size;
}

wxSize wxSizer::GetMaxClientSize( wxWindow *window ) const
{
    wxSize maxSize( window->GetMaxSize() );

    if ( maxSize != wxDefaultSize )
    {
        wxSize size( window->GetSize() );
        wxSize client_size( window->GetClientSize() );

        return wxSize( maxSize.x + client_size.x - size.x,
                       maxSize.y + client_size.y - size.y );
    }
    else
        return wxDefaultSize;
}

wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )
{
    return GetMinSize();  // Already returns client size.
}

wxSize wxSizer::VirtualFitSize( wxWindow *window )
{
    wxSize size     = GetMinClientSize( window );
    wxSize sizeMax  = GetMaxClientSize( window );

    // Limit the size if sizeMax != wxDefaultSize

    if ( size.x > sizeMax.x && sizeMax.x != wxDefaultCoord )
        size.x = sizeMax.x;
    if ( size.y > sizeMax.y && sizeMax.y != wxDefaultCoord )
        size.y = sizeMax.y;

    return size;
}

void wxSizer::SetDimension( int x, int y, int width, int height )
{
    m_position.x = x;
    m_position.y = y;
    m_size.x = width;
    m_size.y = height;
    Layout();
}

wxSize wxSizer::GetMinSize()
{
    wxSize ret( CalcMin() );
    if (ret.x < m_minSize.x) ret.x = m_minSize.x;
    if (ret.y < m_minSize.y) ret.y = m_minSize.y;
    return ret;
}

void wxSizer::DoSetMinSize( int width, int height )
{
    m_minSize.x = width;
    m_minSize.y = height;
}

bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
{
    wxASSERT_MSG( window, _T("SetMinSize for NULL window") );

    // Is it our immediate child?

    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if (item->GetWindow() == window)
        {
            item->SetMinSize( width, height );
            return true;
        }
        node = node->GetNext();
    }

    // No?  Search any subsizers we own then

    node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if ( item->GetSizer() &&
             item->GetSizer()->DoSetItemMinSize( window, width, height ) )
        {
            // A child sizer found the requested windw, exit.
            return true;
        }
        node = node->GetNext();
    }

    return false;
}

bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
{
    wxASSERT_MSG( sizer, _T("SetMinSize for NULL sizer") );

    // Is it our immediate child?

    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if (item->GetSizer() == sizer)
        {
            item->GetSizer()->DoSetMinSize( width, height );
            return true;
        }
        node = node->GetNext();
    }

    // No?  Search any subsizers we own then

    node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if ( item->GetSizer() &&
             item->GetSizer()->DoSetItemMinSize( sizer, width, height ) )
        {
            // A child found the requested sizer, exit.
            return true;
        }
        node = node->GetNext();
    }

    return false;
}

bool wxSizer::DoSetItemMinSize( size_t index, int width, int height )
{
    wxSizerItemList::compatibility_iterator node = m_children.Item( index );

    wxCHECK_MSG( node, false, _T("Failed to find child node") );

    wxSizerItem     *item = node->GetData();

    if (item->GetSizer())
    {
        // Sizers contains the minimal size in them, if not calculated ...
        item->GetSizer()->DoSetMinSize( width, height );
    }
    else
    {
        // ... but the minimal size of spacers and windows is stored via the item
        item->SetMinSize( width, height );
    }

    return true;
}

wxSizerItem* wxSizer::GetItem( wxWindow *window, bool recursive )
{
    wxASSERT_MSG( window, _T("GetItem for NULL window") );

    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem     *item = node->GetData();

        if (item->GetWindow() == window)
        {
            return item;
        }
        else if (recursive && item->IsSizer())
        {
            wxSizerItem *subitem = item->GetSizer()->GetItem( window, true );
            if (subitem)
                return subitem;
        }

        node = node->GetNext();
    }

    return NULL;
}

wxSizerItem* wxSizer::GetItem( wxSizer *sizer, bool recursive )
{
    wxASSERT_MSG( sizer, _T("GetItem for NULL sizer") );

    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        wxSizerItem *item = node->GetData();

        if (item->GetSizer() == sizer)
        {
            return item;
        }
        else if (recursive && item->IsSizer())
        {
            wxSizerItem *subitem = item->GetSizer()->GetItem( sizer, true );
            if (subitem)
                return subitem;
        }

        node = node->GetNext();
    }

    return NULL;
}

wxSizerItem* wxSizer::GetItem( size_t index )
{
    wxCHECK_MSG( index < m_children.GetCount(),
                 NULL,
                 _T("GetItem index is out of range") );

    return m_children.Item( index )->GetData();
}

bool wxSizer::Show( wxWindow *window, bool show, bool recursive )
{
    wxSizerItem *item = GetItem( window, recursive );

    if ( item )
    {
         item->Show( show );
         return true;
    }

    return false;
}

bool wxSizer::Show( wxSizer *sizer, bool show, bool recursive )
{
    wxSizerItem *item = GetItem( sizer, recursive );

    if ( item )
    {
         item->Show( show );
         return true;
    }

    return false;
}

bool wxSizer::Show( size_t index, bool show)
{
    wxSizerItem *item = GetItem( index );

    if ( item )
    {
         item->Show( show );
         return true;
    }

    return false;
}

void wxSizer::ShowItems( bool show )
{
    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
    while (node)
    {
        node->GetData()->Show( show );
        node = node->GetNext();
    }
}

bool wxSizer::IsShown( wxWindow *window ) const
{
    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();