Write the text from a gtk entry to a file?

Question

Hello everyone,

I found the code below for a gtk entry dialog, and extended the code to write the output into a file.

What is the usual way to do this?

I dried do open and close the file in the main function. But i did'n know how do give it as argument to the button_clicked function.

In this working one i have the open and close function in the button_clicked function.

Is this a good solution, or how can i declare the file in the main. Open it in the main and just give the file as argument to the sub function?

Kind regards
Max

#include <iostream>
#include <gtk/gtk.h>
#include <fstream>
using namespace std;

void button_clicked( GtkWidget *widget, gpointer data ) {
ofstream myfile;
myfile.open("test.txt",fstream::out | fstream::in | fstream::app);

g_print("%s\n",gtk_entry_get_text(GTK_ENTRY(data)));
myfile << gtk_entry_get_text(GTK_ENTRY(data)) << '\n';

myfile.close();
}

int main( int argc, char* argv[] ) {
// ofstream myfile;
// myfile.open("test.txt",fstream::out | fstream::in | fstream::app);
// myfile << zeile;

gtk_init(&argc,&argv); // Initalisation
GtkWidget *window, *entry1, *button1, *grid; // declare needet variables

window=gtk_window_new(GTK_WINDOW_TOPLEVEL); // Create window

g_signal_connect(window,"delete-event",G_CALLBACK(gtk_main_quit), NULL);

gtk_container_set_border_width (GTK_CONTAINER (window), 10);
grid = gtk_grid_new (); // Create Grid
//Pack the container in the window
gtk_container_add (GTK_CONTAINER (window), grid);

// here starts the prog
entry1=gtk_entry_new();

button1=gtk_button_new_with_mnemonic("Some text1");

gtk_grid_attach (GTK_GRID (grid), button1, 1, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), entry1, 0, 0, 1, 1);

g_signal_connect(button1,"clicked",G_CALLBACK(button_clicked), entry1);
g_signal_connect(entry1,"activate",G_CALLBACK(button_clicked), entry1);

gtk_widget_show_all(window); // show all widgets
gtk_main(); //start main loop
return 0; }

Answer 1

Actually, I'd encourage external libs here...
OP, I'm not familiar with GTK but AFAIK it is C so that'd make your procedural approach natural. One thing odd: you opened the file in in, out, and append mode? Other than that, I can only offer your post a bump.

Answer 2

I don't think this is the place to ask GTK questions, try in their forums.