I'm using gtk+3.10 on Ubuntu 14.04 and am writing an application in C,
with the user interface constructed with a builder.ui file. I am using
spinbuttons to create and change Cairo drawings of some mathematical functions.
The spinbuttons’ adjustment value is initialised from the builder.ui file and
can then can be changed with the spinbutton, I also read values from a text
file to create and change the drawings, which after being read from the file
(containing many drawing parameters) these parameters are then written to
seperate files for each parameter which are then read into the drawing function
in drawing.c, which is compiled together with mymain.c.
This works ok (the drawings change), except that when reading the values
from the file I would also like to update the values displayed in the
spinbuttons so that they match those in the file and with the correctly updated
drawings.
I have tried using the following, taken from Foundations of GTK+
Development, by Andrew Krause (gtk+2):
gtk_spin_button_set_value (GtkSpinButton *spin_drawingparameter1, int
drawingparameter1);
in the callback for the spinbutton *spin_readfile (which makes the choice
between reading/not reading the file).
When attempting to compile I receive this error message:
mymain.c: In function ‘callback_readfile’:
mymain.c:1124:28: error: expected expression before ‘GtkSpinButton’
gtk_spin_button_set_value (GtkSpinButton *spin_drawingparameter1, int
drawingparameter1);
^
mymain.c:1124:28: error: too few arguments to function
‘gtk_spin_button_set_value’
In file included from /usr/include/gtk-3.0/gtk/gtk.h:176:0,
from mymain.c:9:
/usr/include/gtk-3.0/gtk/gtkspinbutton.h:197:7: note: declared here
void gtk_spin_button_set_value (GtkSpinButton *spin_button,
^
make: *** [mymain] Error 1
The first error I don't know what I need to do at all, while the second error
may be related to the gtk+ version, or it might not....
Can this be done in my builder.ui file, perhaps with “change-value”?
Any help would be greatly appreciated,
Thanks,
Roger Matthews
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