Function gtkDialog

source/MRViewer/MRFileDialog.cpp:258–365

}

std::vector<std::filesystem::path> gtkDialog( const MR::FileDialog::Parameters& params = {} )
{
    // Gtk has a nasty habit of overriding the locale to "".s
    std::optional<std::string> localeStr;
    if ( auto locale = std::setlocale( LC_ALL, nullptr ) )
        localeStr = std::string( locale );
    MR_FINALLY {
        if ( localeStr )
            std::setlocale( LC_ALL, localeStr->c_str() );
    };

    if ( !gtk_init_check( NULL, NULL ) )
    {
        spdlog::error( "Failed to initialize GTK+" );
        return {};
    }
    MR_FINALLY {
        while ( gtk_events_pending() )
            gtk_main_iteration();
    };

    auto [action, title] = gtkDialogParameters( params );
    auto* dialog = gtk_file_chooser_dialog_new( title.c_str(), NULL, action, NULL, NULL );
    MR_FINALLY {
        gtk_widget_destroy( dialog );
    };

    gtk_dialog_add_button( GTK_DIALOG( dialog ), params.saveDialog ? "_Save" : "_Open", GTK_RESPONSE_ACCEPT );
    gtk_dialog_add_button( GTK_DIALOG( dialog ), "_Cancel", GTK_RESPONSE_CANCEL );

    auto* chooser = GTK_FILE_CHOOSER( dialog );

    gtk_file_chooser_set_select_multiple( chooser, params.multiselect );

    for ( const auto& filter: params.filters )
    {
        auto* fileFilter = gtk_file_filter_new();
        gtk_file_filter_set_name( fileFilter, filter.name.c_str() );

        size_t separatorPos = 0;
        for (;;)
        {
            auto nextSeparatorPos = filter.extensions.find( ";", separatorPos );
            auto ext = filter.extensions.substr( separatorPos, nextSeparatorPos - separatorPos );

            gtk_file_filter_add_pattern( fileFilter, ext.c_str() );

            if ( nextSeparatorPos == std::string::npos )
                break;
            separatorPos = nextSeparatorPos + 1;
        }

        gtk_file_chooser_add_filter( chooser, fileFilter ); // the chooser takes ownership of the filter
    }

    const auto currentFolder = MR::utf8string( params.baseFolder.empty() ?
        MR::FileDialog::getLastUsedDir() : params.baseFolder );