panel_fp_properties_3d_model.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2015 Dick Hollenbeck, [email protected]
 * Copyright (C) 2008 Wayne Stambaugh <[email protected]>
 * Copyright The 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 2
 * 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 <panel_fp_properties_3d_model.h>
 
#include <algorithm>
#include <3d_viewer/eda_3d_viewer_frame.h>
#include <dialogs/dialog_configure_paths.h>
#include <env_vars.h>
#include <bitmaps.h>
#include <widgets/grid_icon_text_helpers.h>
#include <widgets/grid_text_button_helpers.h>
#include <widgets/wx_grid.h>
#include <widgets/std_bitmap_button.h>
#include <board.h>
#include <footprint.h>
#include <footprint_library_adapter.h>
#include <footprint_edit_frame.h>
#include <footprint_editor_settings.h>
#include <dialog_footprint_properties_fp_editor.h>
#include "filename_resolver.h"
#include <pgm_base.h>
#include <kiplatform/ui.h>
#include <dialogs/panel_preview_3d_model.h>
#include <dialogs/dialog_select_3d_model.h>
#include <dialogs/panel_embedded_files.h>
#include <settings/settings_manager.h>
#include <project_pcb.h>
 
#include <wx/defs.h>
#include <wx/msgdlg.h>
 
enum MODELS_TABLE_COLUMNS
{
    COL_PROBLEM  = 0,
    COL_FILENAME = 1,
    COL_SHOWN    = 2
};
 
wxDEFINE_EVENT( wxCUSTOM_PANEL_SHOWN_EVENT, wxCommandEvent );
 
PANEL_FP_PROPERTIES_3D_MODEL::PANEL_FP_PROPERTIES_3D_MODEL( PCB_BASE_EDIT_FRAME* aFrame,
                                                            FOOTPRINT* aFootprint,
                                                            DIALOG_SHIM* aDialogParent,
                                                            PANEL_EMBEDDED_FILES* aFilesPanel,
                                                            wxWindow* aParent ) :
        PANEL_FP_PROPERTIES_3D_MODEL_BASE( aParent ),
        m_parentDialog( aDialogParent ),
        m_frame( aFrame ),
        m_footprint( aFootprint ),
        m_filesPanel( aFilesPanel ),
        m_inSelect( false )
{
    m_splitter1->SetSashPosition( FromDIP( m_splitter1->GetSashPosition() ) );
    m_splitter1->SetMinimumPaneSize( FromDIP( m_splitter1->GetMinimumPaneSize() ) );
 
    GRID_TRICKS* trick = new GRID_TRICKS( m_modelsGrid, [this]( wxCommandEvent& aEvent )
                                                        {
                                                            OnAdd3DRow( aEvent );
                                                        } );
    trick->SetTooltipEnable( COL_PROBLEM );
    m_modelsGrid->PushEventHandler( trick );
    m_modelsGrid->SetupColumnAutosizer( COL_FILENAME );
 
    // Get the last 3D directory
    PCBNEW_SETTINGS* cfg = GetAppSettings<PCBNEW_SETTINGS>( "pcbnew" );
 
    if( cfg && cfg->m_LastFootprint3dDir.IsEmpty() )
    {
        wxGetEnv( ENV_VAR::GetVersionedEnvVarName( wxS( "3DMODEL_DIR" ) ),
                  &cfg->m_LastFootprint3dDir );
    }
 
    // Icon showing warning/error information
    wxGridCellAttr* attr = new wxGridCellAttr;
    attr->SetReadOnly();
    m_modelsGrid->SetColAttr( COL_PROBLEM, attr );
 
    // Filename
    attr = new wxGridCellAttr;
 
    if( cfg )
    {
        attr->SetEditor( new GRID_CELL_PATH_EDITOR( m_parentDialog, m_modelsGrid, &cfg->m_LastFootprint3dDir,
                                                    wxT( "*.*" ), true, m_frame->Prj().GetProjectPath(),
                [this]( const wxString& aFile ) -> wxString
                {
                    EMBEDDED_FILES::EMBEDDED_FILE* result = m_filesPanel->AddEmbeddedFile( aFile );
 
                    if( !result )
                    {
                        wxString msg = wxString::Format( _( "Error adding 3D model" ) );
                        wxMessageBox( msg, _( "Error" ), wxICON_ERROR | wxOK, this );
                        return wxString();
                    }
 
                    return result->GetLink();
                } ) );
    }
 
    m_modelsGrid->SetColAttr( COL_FILENAME, attr );
 
    // Show checkbox
    attr = new wxGridCellAttr;
    attr->SetRenderer( new wxGridCellBoolRenderer() );
    attr->SetReadOnly();    // not really; we delegate interactivity to GRID_TRICKS
    attr->SetAlignment( wxALIGN_CENTER, wxALIGN_CENTER );
    m_modelsGrid->SetColAttr( COL_SHOWN, attr );
    m_modelsGrid->SetWindowStyleFlag( m_modelsGrid->GetWindowStyle() & ~wxHSCROLL );
 
    PROJECT_PCB::Get3DCacheManager( &m_frame->Prj() )->GetResolver()->SetProgramBase( &Pgm() );
 
    m_previewPane = new PANEL_PREVIEW_3D_MODEL( m_lowerPanel, m_frame, m_footprint, &m_shapes3D_list );
 
    m_previewPane->SetEmbeddedFilesDelegate( m_filesPanel->GetLocalFiles() );
 
    m_LowerSizer3D->Add( m_previewPane, 1, wxEXPAND, 5 );
 
    // Configure button logos
    m_button3DShapeAdd->SetBitmap( KiBitmapBundle( BITMAPS::small_plus ) );
    m_button3DShapeBrowse->SetBitmap( KiBitmapBundle( BITMAPS::small_folder ) );
    m_button3DShapeRemove->SetBitmap( KiBitmapBundle( BITMAPS::small_trash ) );
 
    Bind( wxEVT_SHOW, &PANEL_FP_PROPERTIES_3D_MODEL::onShowEvent, this );
    m_parentDialog->Bind( wxEVT_ACTIVATE, &PANEL_FP_PROPERTIES_3D_MODEL::onDialogActivateEvent, this );
}
 
 
PANEL_FP_PROPERTIES_3D_MODEL::~PANEL_FP_PROPERTIES_3D_MODEL()
{
    // Delete the GRID_TRICKS.
    m_modelsGrid->PopEventHandler( true );
 
    // Unbind OnShowEvent to prevent unnecessary event handling.
    Unbind( wxEVT_SHOW, &PANEL_FP_PROPERTIES_3D_MODEL::onShowEvent, this );
 
    // free the memory used by all models, otherwise models which were
    // browsed but not used would consume memory
    PROJECT_PCB::Get3DCacheManager( &m_frame->Prj() )->FlushCache( false );
 
    delete m_previewPane;
}
 
 
bool PANEL_FP_PROPERTIES_3D_MODEL::TransferDataToWindow()
{
    ReloadModelsFromFootprint();
    return true;
}
 
 
bool PANEL_FP_PROPERTIES_3D_MODEL::TransferDataFromWindow()
{
    return m_modelsGrid->CommitPendingChanges();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::ReloadModelsFromFootprint()
{
    wxString default_path;
    wxGetEnv( ENV_VAR::GetVersionedEnvVarName( wxS( "3DMODEL_DIR" ) ), &default_path );
 
#ifdef __WINDOWS__
    default_path.Replace( wxT( "/" ), wxT( "\\" ) );
#endif
 
    m_shapes3D_list.clear();
    m_modelsGrid->ClearRows();
 
    wxString origPath, alias, shortPath;
    FILENAME_RESOLVER* res = PROJECT_PCB::Get3DCacheManager( &m_frame->Prj() )->GetResolver();
 
    for( const FP_3DMODEL& model : m_footprint->Models() )
    {
        m_shapes3D_list.push_back( model );
        origPath = model.m_Filename;
 
        if( res && res->SplitAlias( origPath, alias, shortPath ) )
            origPath = alias + wxT( ":" ) + shortPath;
 
        m_modelsGrid->AppendRows( 1 );
        int row = m_modelsGrid->GetNumberRows() - 1;
        m_modelsGrid->SetCellValue( row, COL_FILENAME, origPath );
        m_modelsGrid->SetCellValue( row, COL_SHOWN, model.m_Show ? wxT( "1" ) : wxT( "0" ) );
 
        // Must be after the filename is set
        updateValidateStatus( row );
    }
 
    select3DModel( 0 );
 
    m_previewPane->UpdateDummyFootprint();
    m_modelsGrid->SetGridWidthsDirty();
 
    Layout();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::select3DModel( int aModelIdx )
{
    m_inSelect = true;
 
    aModelIdx = std::max( 0, aModelIdx );
    aModelIdx = std::min( aModelIdx, m_modelsGrid->GetNumberRows() - 1 );
 
    if( m_modelsGrid->GetNumberRows() )
    {
        m_modelsGrid->SelectRow( aModelIdx );
        m_modelsGrid->SetGridCursor( aModelIdx, COL_FILENAME );
    }
 
    m_previewPane->SetSelectedModel( aModelIdx );
 
    m_inSelect = false;
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::On3DModelSelected( wxGridEvent& aEvent )
{
    if( !m_inSelect )
        select3DModel( aEvent.GetRow() );
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::On3DModelCellChanged( wxGridEvent& aEvent )
{
    if( aEvent.GetCol() == COL_FILENAME )
    {
        bool               hasAlias = false;
        FILENAME_RESOLVER* res = PROJECT_PCB::Get3DCacheManager( &m_frame->Prj() )->GetResolver();
        wxString           filename = m_modelsGrid->GetCellValue( aEvent.GetRow(), COL_FILENAME );
 
        // Perform cleanup and validation on the filename if it isn't empty
        if( !filename.empty() )
        {
            filename.Replace( wxT( "\n" ), wxT( "" ) );
            filename.Replace( wxT( "\r" ), wxT( "" ) );
            filename.Replace( wxT( "\t" ), wxT( "" ) );
 
            res->ValidateFileName( filename, hasAlias );
 
            // If the user has specified an alias in the name then prepend ':'
            if( hasAlias )
                filename.insert( 0, wxT( ":" ) );
 
#ifdef __WINDOWS__
            // In KiCad files, filenames and paths are stored using Unix notation
            filename.Replace( wxT( "\\" ), wxT( "/" ) );
#endif
 
            // Update the grid with the modified filename
            m_modelsGrid->SetCellValue( aEvent.GetRow(), COL_FILENAME, filename );
        }
 
        // Save the filename in the 3D shapes table
        m_shapes3D_list[ aEvent.GetRow() ].m_Filename = filename;
 
        // Update the validation status
        updateValidateStatus( aEvent.GetRow() );
    }
    else if( aEvent.GetCol() == COL_SHOWN )
    {
        wxString showValue = m_modelsGrid->GetCellValue( aEvent.GetRow(), COL_SHOWN );
 
        m_shapes3D_list[ aEvent.GetRow() ].m_Show = ( showValue == wxT( "1" ) );
    }
 
    m_previewPane->UpdateDummyFootprint();
    onModify();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::OnRemove3DModel( wxCommandEvent&  )
{
    if( !m_modelsGrid->CommitPendingChanges() )
        return;
 
    if( !m_modelsGrid->GetNumberRows() || m_shapes3D_list.empty() )
        return;
 
    wxArrayInt selectedRows = m_modelsGrid->GetSelectedRows();
    wxGridCellCoordsArray selectedCells = m_modelsGrid->GetSelectedCells();
    wxGridCellCoordsArray blockTopLeft = m_modelsGrid->GetSelectionBlockTopLeft();
    wxGridCellCoordsArray blockBottomRight = m_modelsGrid->GetSelectionBlockBottomRight();
 
    for( unsigned ii = 0; ii < selectedCells.GetCount(); ++ii )
        selectedRows.Add( selectedCells[ii].GetRow() );
 
    if( !blockTopLeft.IsEmpty() && !blockBottomRight.IsEmpty() )
    {
        for( int row = blockTopLeft[0].GetRow(); row <= blockBottomRight[0].GetRow(); ++row )
            selectedRows.Add( row );
    }
 
    if( selectedRows.empty() && m_modelsGrid->GetGridCursorRow() >= 0 )
        selectedRows.Add( m_modelsGrid->GetGridCursorRow() );
 
    if( selectedRows.empty() )
    {
        wxBell();
        return;
    }
 
    std::sort( selectedRows.begin(), selectedRows.end() );
 
    int nextSelection = selectedRows.front();
    int lastRow = -1;
 
    // Don't allow selection until we call select3DModel(), below.  Otherwise wxWidgets
    // has a tendency to get its knickers in a knot....
    m_inSelect = true;
 
    m_modelsGrid->ClearSelection();
 
    for( int ii = selectedRows.size() - 1; ii >= 0; --ii )
    {
        int row = selectedRows[ii];
 
        if( row == lastRow )
            continue;
 
        lastRow = row;
 
        if( row < 0 || row >= (int) m_shapes3D_list.size() )
            continue;
 
        // Not all files are embedded but this will ignore the ones that are not
        m_filesPanel->RemoveEmbeddedFile( m_shapes3D_list[row].m_Filename );
        m_shapes3D_list.erase( m_shapes3D_list.begin() + row );
        m_modelsGrid->DeleteRows( row );
    }
 
    if( m_modelsGrid->GetNumberRows() > 0 )
        nextSelection = std::min( nextSelection, m_modelsGrid->GetNumberRows() - 1 );
    else
        nextSelection = 0;
 
    select3DModel( nextSelection );       // will clamp index within bounds
    m_previewPane->UpdateDummyFootprint();
    m_inSelect = false;
 
    onModify();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::OnAdd3DModel( wxCommandEvent&  )
{
    if( !m_modelsGrid->CommitPendingChanges() )
        return;
 
    int selected = m_modelsGrid->GetGridCursorRow();
 
    PROJECT&           prj = m_frame->Prj();
    FP_3DMODEL         model;
    S3D_CACHE*         cache = PROJECT_PCB::Get3DCacheManager( &prj );
    FILENAME_RESOLVER* res = cache->GetResolver();
 
    wxString initialpath = prj.GetRString( PROJECT::VIEWER_3D_PATH );
    wxString sidx = prj.GetRString( PROJECT::VIEWER_3D_FILTER_INDEX );
    int      filter = 0;
 
    // If the PROJECT::VIEWER_3D_PATH hasn't been set yet, use the 3DMODEL_DIR environment
    // variable and fall back to the project path if necessary.
    if( initialpath.IsEmpty() )
    {
        if( !wxGetEnv( ENV_VAR::GetVersionedEnvVarName( wxS( "3DMODEL_DIR" ) ), &initialpath )
            || initialpath.IsEmpty() )
        {
            initialpath = prj.GetProjectPath();
        }
    }
 
    if( !sidx.empty() )
    {
        long tmp;
        sidx.ToLong( &tmp );
 
        if( tmp > 0 && tmp <= INT_MAX )
            filter = (int) tmp;
    }
 
    DIALOG_SELECT_3DMODEL dm( m_parentDialog, cache, &model, initialpath, filter );
 
    // Use QuasiModal so that Configure3DPaths (and its help window) will work
    int retval = dm.ShowQuasiModal();
 
    if( retval != wxID_OK || model.m_Filename.empty() )
    {
        if( selected >= 0 )
        {
            select3DModel( selected );
            updateValidateStatus( selected );
        }
 
        return;
    }
 
    if( dm.IsEmbedded3DModel() )
    {
        wxString libraryName = m_footprint->GetFPID().GetLibNickname();
        wxString footprintBasePath = wxEmptyString;
 
        std::optional<LIBRARY_TABLE_ROW*> fpRow =
                            PROJECT_PCB::FootprintLibAdapter( &m_frame->Prj() )->GetRow( libraryName );
        if( fpRow )
            footprintBasePath = LIBRARY_MANAGER::GetFullURI( *fpRow, true );
 
        std::vector<const EMBEDDED_FILES*> embeddedFilesStack;
        embeddedFilesStack.push_back( m_filesPanel->GetLocalFiles() );
        embeddedFilesStack.push_back( m_frame->GetBoard()->GetEmbeddedFiles() );
 
        wxString   fullPath = res->ResolvePath( model.m_Filename, footprintBasePath, std::move( embeddedFilesStack ) );
        wxFileName fname( fullPath );
 
        EMBEDDED_FILES::EMBEDDED_FILE* result = m_filesPanel->AddEmbeddedFile( fname.GetFullPath() );                                                                               ;
 
        if( !result )
        {
 
            wxString msg = wxString::Format( _( "Error adding 3D model" ) );
            wxMessageBox( msg, _( "Error" ), wxICON_ERROR | wxOK, this );
            return;
        }
 
        model.m_Filename = result->GetLink();
    }
 
    prj.SetRString( PROJECT::VIEWER_3D_PATH, initialpath );
    sidx = wxString::Format( wxT( "%i" ), filter );
    prj.SetRString( PROJECT::VIEWER_3D_FILTER_INDEX, sidx );
 
    wxString alias;
    wxString shortPath;
    wxString filename = model.m_Filename;
 
    if( res && res->SplitAlias( filename, alias, shortPath ) )
        filename = alias + wxT( ":" ) + shortPath;
 
#ifdef __WINDOWS__
    // In KiCad files, filenames and paths are stored using Unix notation
    model.m_Filename.Replace( wxT( "\\" ), wxT( "/" ) );
#endif
 
    model.m_Show = true;
    m_shapes3D_list.push_back( model );
 
    int idx = m_modelsGrid->GetNumberRows();
    m_modelsGrid->AppendRows( 1 );
    m_modelsGrid->SetCellValue( idx, COL_FILENAME, filename );
    m_modelsGrid->SetCellValue( idx, COL_SHOWN, wxT( "1" ) );
 
    select3DModel( idx );
    updateValidateStatus( idx );
 
    m_previewPane->UpdateDummyFootprint();
    onModify();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::OnAdd3DRow( wxCommandEvent&  )
{
    m_modelsGrid->OnAddRow(
            [&]() -> std::pair<int, int>
            {
                FP_3DMODEL model;
 
                model.m_Show = true;
                m_shapes3D_list.push_back( model );
 
                int row = m_modelsGrid->GetNumberRows();
                m_modelsGrid->AppendRows( 1 );
                m_modelsGrid->SetCellValue( row, COL_SHOWN, wxT( "1" ) );
                m_modelsGrid->SetCellValue( row, COL_PROBLEM, "" );
 
                select3DModel( row );
                updateValidateStatus( row );
                onModify();
 
                return { row, COL_FILENAME };
            } );
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::updateValidateStatus( int aRow )
{
    int icon = 0;
    wxString errStr;
 
    switch( validateModelExists( m_modelsGrid->GetCellValue( aRow, COL_FILENAME) ) )
    {
        case MODEL_VALIDATE_ERRORS::MODEL_NO_ERROR:
            icon   = 0;
            errStr = "";
            break;
 
        case MODEL_VALIDATE_ERRORS::NO_FILENAME:
            icon   = wxICON_WARNING;
            errStr = _( "No filename entered" );
            break;
 
        case MODEL_VALIDATE_ERRORS::ILLEGAL_FILENAME:
            icon   = wxICON_ERROR;
            errStr = _( "Illegal filename" );
            break;
 
        case MODEL_VALIDATE_ERRORS::RESOLVE_FAIL:
            icon   = wxICON_ERROR;
            errStr = _( "File not found" );
            break;
 
        case MODEL_VALIDATE_ERRORS::OPEN_FAIL:
            icon   = wxICON_ERROR;
            errStr = _( "Unable to open file" );
            break;
 
        default:
            icon   = wxICON_ERROR;
            errStr = _( "Unknown error" );
            break;
    }
 
    m_modelsGrid->SetCellValue( aRow, COL_PROBLEM, errStr );
    m_modelsGrid->SetCellRenderer( aRow, COL_PROBLEM, new GRID_CELL_STATUS_ICON_RENDERER( icon ) );
}
 
 
MODEL_VALIDATE_ERRORS PANEL_FP_PROPERTIES_3D_MODEL::validateModelExists( const wxString& aFilename )
{
    if( aFilename.empty() )
        return MODEL_VALIDATE_ERRORS::NO_FILENAME;
 
    bool               hasAlias = false;
    FILENAME_RESOLVER* resolv = PROJECT_PCB::Get3DFilenameResolver( &m_frame->Prj() );
 
    if( !resolv )
        return MODEL_VALIDATE_ERRORS::RESOLVE_FAIL;
 
    if( !resolv->ValidateFileName( aFilename, hasAlias ) )
        return MODEL_VALIDATE_ERRORS::ILLEGAL_FILENAME;
 
    wxString libraryName = m_footprint->GetFPID().GetLibNickname();
    wxString footprintBasePath = wxEmptyString;
 
    std::optional<LIBRARY_TABLE_ROW*> fpRow =
                            PROJECT_PCB::FootprintLibAdapter( &m_frame->Prj() )->GetRow( libraryName );
    if( fpRow )
        footprintBasePath = LIBRARY_MANAGER::GetFullURI( *fpRow, true );
 
    std::vector<const EMBEDDED_FILES*> embeddedFilesStack;
    embeddedFilesStack.push_back( m_filesPanel->GetLocalFiles() );
    embeddedFilesStack.push_back( m_frame->GetBoard()->GetEmbeddedFiles() );
 
    wxString fullPath = resolv->ResolvePath( aFilename, footprintBasePath, std::move( embeddedFilesStack ) );
 
    if( fullPath.IsEmpty() )
        return MODEL_VALIDATE_ERRORS::RESOLVE_FAIL;
 
    if( !wxFileName::IsFileReadable( fullPath ) )
        return MODEL_VALIDATE_ERRORS::OPEN_FAIL;
 
    return MODEL_VALIDATE_ERRORS::MODEL_NO_ERROR;
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::Cfg3DPath( wxCommandEvent& event )
{
    DIALOG_CONFIGURE_PATHS dlg( this );
 
    if( dlg.ShowQuasiModal() == wxID_OK )
        m_previewPane->UpdateDummyFootprint();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::OnUpdateUI( wxUpdateUIEvent& event )
{
    m_button3DShapeRemove->Enable( m_modelsGrid->GetNumberRows() > 0 );
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::onModify()
{
    if( DIALOG_SHIM* dlg = dynamic_cast<DIALOG_SHIM*>( wxGetTopLevelParent( this ) ) )
        dlg->OnModify();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::onShowEvent( wxShowEvent& aEvent )
{
    postCustomPanelShownEventWithPredicate( static_cast<int>( aEvent.IsShown() ) );
    aEvent.Skip();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::onDialogActivateEvent( wxActivateEvent& aEvent )
{
    postCustomPanelShownEventWithPredicate( aEvent.GetActive() && m_previewPane->IsShownOnScreen() );
    aEvent.Skip();
}
 
 
void PANEL_FP_PROPERTIES_3D_MODEL::postCustomPanelShownEventWithPredicate( bool predicate )
{
    wxCommandEvent event( wxCUSTOM_PANEL_SHOWN_EVENT );
    event.SetEventObject( m_previewPane );
    event.SetInt( static_cast<int>( predicate ) );
    m_previewPane->ProcessWindowEvent( event );
}