manager.cpp

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        pane.buttons = p.buttons;
        p = pane;
    }
    
    if (update)
        Update();

    return true;
}


void wxFrameManager::GetPanePositionsAndSizes(wxDockInfo& dock,
                                              wxArrayInt& positions,
                                              wxArrayInt& sizes)
{
    int caption_size = m_art->GetMetric(wxAUI_ART_CAPTION_SIZE);
    int pane_border_size = m_art->GetMetric(wxAUI_ART_PANE_BORDER_SIZE);
    int gripper_size = m_art->GetMetric(wxAUI_ART_GRIPPER_SIZE);

    positions.Empty();
    sizes.Empty();

    int offset, action_pane = -1;
    int pane_i, pane_count = dock.panes.GetCount();

    // find the pane marked as our action pane
    for (pane_i = 0; pane_i < pane_count; ++pane_i)
    {
        wxPaneInfo& pane = *(dock.panes.Item(pane_i));

        if (pane.state & wxPaneInfo::actionPane)
        {
            wxASSERT_MSG(action_pane==-1, wxT("Too many fixed action panes"));
            action_pane = pane_i;
        }
    }
    
    // set up each panes default position, and
    // determine the size (width or height, depending
    // on the dock's orientation) of each pane
    for (pane_i = 0; pane_i < pane_count; ++pane_i)
    {
        wxPaneInfo& pane = *(dock.panes.Item(pane_i));
        positions.Add(pane.dock_pos);
        int size = 0;
        
        if (pane.HasBorder())
            size += (pane_border_size*2);
        if (pane.HasGripper())
            size += gripper_size;
                
        if (dock.IsHorizontal())
        {
            size += pane.best_size.x;
        }
         else
        {
            if (pane.HasCaption())
                size += caption_size; 
            size += pane.best_size.y;
        }
   
        sizes.Add(size);
    }

    // if there is no action pane, just return the default
    // positions (as specified in pane.pane_pos)
    if (action_pane == -1)
        return;

    offset = 0;
    for (pane_i = action_pane-1; pane_i >= 0; --pane_i)
    {
        int amount = positions[pane_i+1] - (positions[pane_i] + sizes[pane_i]);

        if (amount >= 0)
            offset += amount;
             else
            positions[pane_i] -= -amount;

        offset += sizes[pane_i];
    }
    
    // if the dock mode is fixed, make sure none of the panes
    // overlap; we will bump panes that overlap
    offset = 0;
    for (pane_i = action_pane; pane_i < pane_count; ++pane_i)
    {
        int amount = positions[pane_i] - offset;
        if (amount >= 0)
            offset += amount;
             else
            positions[pane_i] += -amount;

        offset += sizes[pane_i];
    }
}


void wxFrameManager::LayoutAddPane(wxSizer* cont,
                                   wxDockInfo& dock,
                                   wxPaneInfo& pane,
                                   wxDockUIPartArray& uiparts,
                                   bool spacer_only)
{        
    wxDockUIPart part;
    wxSizerItem* sizer_item;

    int caption_size = m_art->GetMetric(wxAUI_ART_CAPTION_SIZE);
    int gripper_size = m_art->GetMetric(wxAUI_ART_GRIPPER_SIZE);
    int pane_border_size = m_art->GetMetric(wxAUI_ART_PANE_BORDER_SIZE);
    int pane_button_size = m_art->GetMetric(wxAUI_ART_PANE_BUTTON_SIZE);

    // find out the orientation of the item (orientation for panes
    // is the same as the dock's orientation)
    int orientation;
    if (dock.IsHorizontal())
        orientation = wxHORIZONTAL;
         else
        orientation = wxVERTICAL;

    // this variable will store the proportion
    // value that the pane will receive
    int pane_proportion = pane.dock_proportion;

    wxBoxSizer* horz_pane_sizer = new wxBoxSizer(wxHORIZONTAL);
    wxBoxSizer* vert_pane_sizer = new wxBoxSizer(wxVERTICAL);

    if (pane.HasGripper())
    {
        sizer_item = horz_pane_sizer->Add(gripper_size, 1, 0, wxEXPAND);

        part.type = wxDockUIPart::typeGripper;
        part.dock = &dock;
        part.pane = &pane;
        part.button = NULL;
        part.orientation = orientation;
        part.cont_sizer = horz_pane_sizer;
        part.sizer_item = sizer_item;
        uiparts.Add(part);
    }

    if (pane.HasCaption())
    {
        // create the caption sizer
        wxBoxSizer* caption_sizer = new wxBoxSizer(wxHORIZONTAL);

        sizer_item = caption_sizer->Add(1, caption_size, 1, wxEXPAND);

        part.type = wxDockUIPart::typeCaption;
        part.dock = &dock;
        part.pane = &pane;
        part.button = NULL;
        part.orientation = orientation;
        part.cont_sizer = vert_pane_sizer;
        part.sizer_item = sizer_item;
        int caption_part_idx = uiparts.GetCount();
        uiparts.Add(part);

        // add pane buttons to the caption
        int i, button_count;
        for (i = 0, button_count = pane.buttons.GetCount();
             i < button_count; ++i)
        {
            wxPaneButton& button = pane.buttons.Item(i);

            sizer_item = caption_sizer->Add(pane_button_size,
                                            caption_size,
                                            0, wxEXPAND);

            part.type = wxDockUIPart::typePaneButton;
            part.dock = &dock;
            part.pane = &pane;
            part.button = &button;
            part.orientation = orientation;
            part.cont_sizer = caption_sizer;
            part.sizer_item = sizer_item;
            uiparts.Add(part);
        }

        // add the caption sizer
        sizer_item = vert_pane_sizer->Add(caption_sizer, 0, wxEXPAND);

        uiparts.Item(caption_part_idx).sizer_item = sizer_item;
    }

    // add the pane window itself
    if (spacer_only)
    {
        sizer_item = vert_pane_sizer->Add(1, 1, 1, wxEXPAND);
    }
     else
    {
        sizer_item = vert_pane_sizer->Add(pane.window, 1, wxEXPAND);
        vert_pane_sizer->SetItemMinSize(pane.window, 1, 1);
    }

    part.type = wxDockUIPart::typePane;
    part.dock = &dock;
    part.pane = &pane;
    part.button = NULL;
    part.orientation = orientation;
    part.cont_sizer = vert_pane_sizer;
    part.sizer_item = sizer_item;
    uiparts.Add(part);


    // determine if the pane should have a minimum size; if the pane is
    // non-resizable (fixed) then we must set a minimum size. Alternitavely,
    // if the pane.min_size is set, we must use that value as well
    
    wxSize min_size = pane.min_size;
    if (pane.IsFixed())
    {
        if (min_size == wxDefaultSize)
        {
            min_size = pane.best_size;
            pane_proportion = 0;
        }
    }
    
    if (min_size != wxDefaultSize)
    {
        vert_pane_sizer->SetItemMinSize(
                        vert_pane_sizer->GetChildren().GetCount()-1,
                        min_size.x, min_size.y);
    }


    // add the verticle sizer (caption, pane window) to the
    // horizontal sizer (gripper, verticle sizer)
    horz_pane_sizer->Add(vert_pane_sizer, 1, wxEXPAND);

    // finally, add the pane sizer to the dock sizer

    if (pane.HasBorder())
    {
        // allowing space for the pane's border
        sizer_item = cont->Add(horz_pane_sizer, pane_proportion,
                               wxEXPAND | wxALL, pane_border_size);

        part.type = wxDockUIPart::typePaneBorder;
        part.dock = &dock;
        part.pane = &pane;
        part.button = NULL;
        part.orientation = orientation;
        part.cont_sizer = cont;
        part.sizer_item = sizer_item;
        uiparts.Add(part);
    }
     else
    {
        sizer_item = cont->Add(horz_pane_sizer, pane_proportion, wxEXPAND);
    }
}

void wxFrameManager::LayoutAddDock(wxSizer* cont,
                                   wxDockInfo& dock,
                                   wxDockUIPartArray& uiparts,
                                   bool spacer_only)
{
    wxSizerItem* sizer_item;
    wxDockUIPart part;

    int sash_size = m_art->GetMetric(wxAUI_ART_SASH_SIZE);
    int orientation = dock.IsHorizontal() ? wxHORIZONTAL : wxVERTICAL;

    // resizable bottom and right docks have a sash before them
    if (!dock.fixed && (dock.dock_direction == wxAUI_DOCK_BOTTOM ||
                        dock.dock_direction == wxAUI_DOCK_RIGHT))
    {
        sizer_item = cont->Add(sash_size, sash_size, 0, wxEXPAND);

        part.type = wxDockUIPart::typeDockSizer;
        part.orientation = orientation;
        part.dock = &dock;
        part.pane = NULL;
        part.button = NULL;
        part.cont_sizer = cont;
        part.sizer_item = sizer_item;
        uiparts.Add(part);
    }

    // create the sizer for the dock
    wxSizer* dock_sizer = new wxBoxSizer(orientation);

    // add each pane to the dock
    int pane_i, pane_count = dock.panes.GetCount();

    if (dock.fixed)
    {
        wxArrayInt pane_positions, pane_sizes;
        
        // figure out the real pane positions we will
        // use, without modifying the each pane's pane_pos member
        GetPanePositionsAndSizes(dock, pane_positions, pane_sizes);

        int offset = 0;
        for (pane_i = 0; pane_i < pane_count; ++pane_i)
        {
            wxPaneInfo& pane = *(dock.panes.Item(pane_i));
            int pane_pos = pane_positions.Item(pane_i);

            int amount = pane_pos - offset;
            if (amount > 0)
            {
                if (dock.IsVertical())
                    sizer_item = dock_sizer->Add(1, amount, 0, wxEXPAND);
                     else
                    sizer_item = dock_sizer->Add(amount, 1, 0, wxEXPAND);

                part.type = wxDockUIPart::typeBackground;
                part.dock = &dock;
                part.pane = NULL;
                part.button = NULL;
                part.orientation = (orientation==wxHORIZONTAL) ? wxVERTICAL:wxHORIZONTAL;
                part.cont_sizer = dock_sizer;
                part.sizer_item = sizer_item;
                uiparts.Add(part);

                offset += amount;
            }

            LayoutAddPane(dock_sizer, dock, pane, uiparts, spacer_only);

            offset += pane_sizes.Item(pane_i);
        }

        // at the end add a very small stretchable background area
        sizer_item = dock_sizer->Add(1,1, 1, wxEXPAND);

        part.type = wxDockUIPart::typeBackground;
        part.dock = &dock;
        part.pane = NULL;
        part.button = NULL;
        part.orientation = orientation;
        part.cont_sizer = dock_sizer;
        part.sizer_item = sizer_item;
        uiparts.Add(part);
    }
     else
    {
        for (pane_i = 0; pane_i < pane_count; ++pane_i)
        {
            wxPaneInfo& pane = *(dock.panes.Item(pane_i));

            // if this is not the first pane being added,
            // we need to add a pane sizer
            if (pane_i > 0)
            {
                sizer_item = dock_sizer->Add(sash_size, sash_size, 0, wxEXPAND);

                part.type = wxDockUIPart::typePaneSizer;
                part.dock = &dock;
                part.pane = dock.panes.Item(pane_i-1);
                part.button = NULL;
                part.orientation = (orientation==wxHORIZONTAL) ? wxVERTICAL:wxHORIZONTAL;
                part.cont_sizer = dock_sizer;
                part.sizer_item = sizer_item;
                uiparts.Add(part);
            }

            LayoutAddPane(dock_sizer, dock, pane, uiparts, spacer_only);
        }
    }

    if (dock.dock_direction == wxAUI_DOCK_CENTER)
        sizer_item = cont->Add(dock_sizer, 1, wxEXPAND);
         else
        sizer_item = cont->Add(dock_sizer, 0, wxEXPAND);

    part.type = wxDockUIPart::typeDock;
    part.dock = &dock;
    part.pane = NULL;
    part.button = NULL;
    part.orientation = orientation;
    part.cont_sizer = cont;
    part.sizer_item = sizer_item;
    uiparts.Add(part);

    if (dock.IsHorizontal())
        cont->SetItemMinSize(dock_sizer, 0, dock.size);
         else
        cont->SetItemMinSize(dock_sizer, dock.size, 0);

    //  top and left docks have a sash after them
    if (!dock.fixed && (dock.dock_direction == wxAUI_DOCK_TOP ||
                        dock.dock_direction == wxAUI_DOCK_LEFT))
    {
        sizer_item = cont->Add(sash_size, sash_size, 0, wxEXPAND);

        part.type = wxDockUIPart::typeDockSizer;
        part.dock = &dock;
        part.pane = NULL;
        part.button = NULL;
        part.orientation = orientation;
        part.cont_sizer = cont;
        part.sizer_item = sizer_item;
        uiparts.Add(part);
    }
}

wxSizer* wxFrameManager::LayoutAll(wxPaneInfoArray& panes,
                                   wxDockInfoArray& docks,