On Sun, 2004-08-29 at 22:54, edward hage wrote:
> Hello,
>
> I have made a program which shows a table with buttons, created like this
> ..........
>
> for (i=0; i < vertical - 1; i++)
> { ............. etc.
> ...........etc. ....etc.......
> for (j=1; j < vertical; j++)
> {
> if (i < j)
> {
> button = gtk_button_new ();
> gtk_button_set_label ( (GtkButton *) button , " ");
> gtk_table_attach_defaults (GTK_TABLE (table), button , 1 + j, 2 + j, 1 + i, 2 + i);
> g_signal_connect (GTK_OBJECT(button), "clicked", (GCallback) toggle_location_event,
> GINT_TO_POINTER (sum(i)+j));
> }
> }
> .....etc............
> }
>
> I have a call-back function toggle_location_event which can change the text of the button
> which is pressed.
> Now I also want to change the text of a button that is not pressed ( in
> toggle_location_event). I know the location i and j of that button, but I don't know how
> to change the text because I don't have the object-name myself (because I use button =
> gtk_button_new () lots of times to create more widgets which don't have unique names).
>
> How can I retrieve the widget from the known location so I can change the text on the button ?
You can cache a matrix with your buttons and the last changed buttons in
a structure[1] and then send this structure[2] as user data (in the
callback).
1 -
struct buttons_matrix {
GtkButtons * table[][];
gint last_x;
gint last_y;
};
2 -
struct change_button {
struct buttons_matrix *m;
gint x;
gint y;
};
So your problem resolves in two issues: a) you need a central structure
for holding your data (maybe a GObject?); b) you may need to create
auxiliar structures for sending multiple arguments trough callbacks.
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