GTK+ Forums

Chrishas · Joined: 09 May 2008 Posts: 2

I have the following function in C:

Micah Carrick · Posted: Fri May 09, 2008 3:59 pm Post subject: gtk_entry_get_text

GtkWidget *username;
GtkWidget *password;
username = gtk_entry_new();
password = gtk_entry_new();
username = text[0];
password = text[1];

You're saying password is a pointer to a GtkWidget, assigning it to the return value of gtk_entry_new () and then reassigning it to text[1] which is passed to the function, presumptively an array.

So there are lots of issues here. I would try this line of code:
GTK_IS_ENTRY(password)
And I'll think you'll find that it is not an entry.

Can you paste the code that calls this function?

Chrishas · Joined: 09 May 2008 Posts: 2

Here's the code:

Micah Carrick · Posted: Sat May 10, 2008 3:29 pm Post subject:

We typically use structs to hold our widget references when we need to pass more than one to a callback function as user_data. This example uses that method to pass and entry and a textview to a callback function: http://www.gtkforums.com/about906.html

It makes the code nice and easy to read and is a step closer to creating GObjects which you might pass around to callbacks.

Code: (C)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

typedef struct
{
GtkWidget *user_name;
GtkWidget *password;
} MyWidgets;

static void login()
{
GtkWidget *login_window;
GtkWidget *login_button;
GtkWidget *fixed;
GtkWidget *luser;
GtkWidget *lpass;
MyWidgets *widgets;

/* allocate space for MyWidgets struct */
widgets = g_slice_new (MyWidgets);

/* Create login window */
login_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_container_set_border_width (GTK_CONTAINER (login_window), 10);
gtk_window_set_skip_taskbar_hint(GTK_WINDOW (login_window), TRUE);

/* Signal handling for close button */
g_signal_connect (G_OBJECT (login_window), "destroy",
G_CALLBACK (gtk_widget_destroy), G_OBJECT(login_window));

/* Create new fixed container */
fixed = gtk_fixed_new();

/* Add fixed container to window container */
login_button = gtk_button_new_with_label ("Login");
luser = gtk_label_new("Username");
lpass = gtk_label_new("Password");

widgets->user_name = gtk_entry_new();
widgets->password = gtk_entry_new();

g_signal_connect (G_OBJECT (login_button), "clicked",
G_CALLBACK (check_id), widgets);

gtk_entry_set_visibility(GTK_ENTRY (widgets->password),FALSE);

// Add widgets to their containers
gtk_container_add(GTK_CONTAINER(login_window), GTK_WIDGET(fixed));
gtk_fixed_put(GTK_FIXED(fixed), luser,1,1);
gtk_fixed_put(GTK_FIXED(fixed), lpass,1,40);
gtk_fixed_put(GTK_FIXED(fixed), widgets->user_name,100,1);
gtk_fixed_put(GTK_FIXED(fixed), widgets->password,100,40);
gtk_fixed_put(GTK_FIXED(fixed), login_button,100,80);

// Display Widgets
gtk_widget_show(fixed);
gtk_widget_show(luser);
gtk_widget_show(lpass);
gtk_widget_show(widgets->user_name);
gtk_widget_show(widgets->password);
gtk_widget_show(login_button);
gtk_widget_show(login_window);
gtk_grab_add(login_window);
}