gtkmm and FileChooserButton can't get file name

Question

this is my code, I try get file_name after choose file with widget FileChooserButton

Gtk::FileChooserButton *chooserButton = nullptr; std::string idChooserButton = commonArray[b]["id"]; builder->get_widget(idChooserButton, chooserButton); Php::call("var_dump",chooserButton); if (strcmp(commonArray[b]["action"], "click") == 0) { Php::Value callback = commonArray[b]["callback"]; chooserButton->signal_selection_changed().connect( sigc::bind<Php::Value,Php::Value>( sigc::mem_fun(*this, &ParserGtk::callbacks), callback, chooserButton->get_filename() ) ); }

I call functino get_filename but get_filename return empty string "";

Naumov · Accepted Answer · 2016-10-23 14:33:33Z

Signals and sigc::bind pass values computed at connection time. So when you do

chooserButton->get_filename()

This will return an empty string, the Gtk::FileChooserButton having not been displayed or used at that point.

You will need to call chooserButton->get_filename() in your call-back function to get the current value.

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