wx_treebook.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2023 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include <widgets/wx_treebook.h>
#include <wx/panel.h>
#include <wx/sizer.h>
 
 
class LAZY_PAGE : public wxPanel
{
public:
 LAZY_PAGE( wxWindow* aParent, std::function<wxWindow*( wxWindow* aParent )> aLazyCtor ) :
 wxPanel( aParent, wxID_ANY ),
 m_lazyCtor( std::move( aLazyCtor ) ),
 m_mainSizer( nullptr ),
 m_contents( nullptr )
 {
 m_mainSizer = new wxBoxSizer( wxVERTICAL );
 SetSizer( m_mainSizer );
 }
 
 wxWindow* Resolve()
 {
 if( !m_contents )
 {
 m_contents = m_lazyCtor( this );
 m_mainSizer->Add( m_contents, 1, wxEXPAND, 5 );
 m_mainSizer->Layout();
 
 m_contents->TransferDataToWindow();
 }
 
 return m_contents;
 }
 
 bool Show( bool show ) override
 {
 if( show )
 Resolve();
 
 // m_contents has been created as a child window of LAZY_PAGE, and has been added to
 // LAZY_PAGE's m_mainSizer. So wxPanel::Show() should call m_contents' Show() method,
 // whether overridden or not. Only it doesn't, so we call it directly here.
 if( show && m_contents )
 m_contents->Show( true );
 
 return wxPanel::Show( show );
 }
 
private:
 std::function<wxWindow*( wxWindow* aParent )> m_lazyCtor;
 
 wxSizer* m_mainSizer;
 wxWindow* m_contents;
};
 
 
WX_TREEBOOK::WX_TREEBOOK( wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size,
 long style, const wxString& name ) :
 wxTreebook( parent, id, pos, size, style, name )
{
}
 
 
bool WX_TREEBOOK::AddLazyPage( std::function<wxWindow*( wxWindow* aParent )> aLazyCtor,
 const wxString& text, bool bSelect, int imageId )
{
 return AddPage( new LAZY_PAGE( this, std::move( aLazyCtor ) ), text, bSelect, imageId );
}
 
 
bool WX_TREEBOOK::AddLazySubPage( std::function<wxWindow*( wxWindow* aParent )> aLazyCtor,
 const wxString& text, bool bSelect, int imageId )
{
 return AddSubPage( new LAZY_PAGE( this, std::move( aLazyCtor ) ), text, bSelect, imageId );
}
 
 
wxWindow* WX_TREEBOOK::ResolvePage( size_t aPage )
{
 wxWindow* page = GetPage( aPage );
 
 if( LAZY_PAGE* lazyPage = dynamic_cast<LAZY_PAGE*>( page ) )
 return lazyPage->Resolve();
 
 return page;
}