why is this window not appearing - callback

Question

I want a button's callback method to instantiate a window (with editor) each time the button is clicked, possibly resulting in multiple windows with editors visible simultaneously. For now I would be happy if just one would appear -- it doesn't.
Comments regarding FLTK and C++ programming practice in general are also welcome.
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Text_Editor.H>
#include <FL/Fl_Text_Buffer.H>
class MainWin : public Fl_Window {
public:
MainWin(int w, int h, const char *title);
~MainWin();
Fl_Button* gobtn;
Fl_Text_Editor* ed; // first editor included with main window
Fl_Text_Buffer* buf;
private:
static void gomthd(Fl_Widget *, void *); // "go" method
};
class AdditionalWin : public Fl_Window { // more editors if necessary
public:
AdditionalWin(int w, int h, const char *title);
~AdditionalWin();
Fl_Text_Editor *ed;
Fl_Text_Buffer *buf;
};
int main () {
MainWin win(105, 405, "main");
return Fl::run();
}
MainWin::MainWin(int w, int h, const char* title):Fl_Window(w,h,title) {
gobtn = new Fl_Button(8, 38, 35, 20, "go");
gobtn->callback(gomthd, this);
ed = new Fl_Text_Editor(6, 67, 93, 331);
buf = new Fl_Text_Buffer();
ed->buffer(buf);
end();
resizable(this);
show();
}
AdditionalWin::AdditionalWin(int w, int h, const char *title):Fl_Window(w, h, title) {
ed = new Fl_Text_Editor(6, 67, 93, 331);
buf = new Fl_Text_Buffer();
ed->buffer(buf);
end();
resizable(this);
show();
}
void MainWin::gomthd(Fl_Widget* o, void* v) {
AdditionalWin awin(105, 405, "more");
awin.position(1, 1);
awin.show(); // ??? nothing appears
}
MainWin::~MainWin(){}
AdditionalWin::~AdditionalWin(){}

Answer 1

Very late to the party but still: I think the new window never shows, because awin, being a local variable, gets destroyed as soon as the MainWin::gomthd() function returns.