Hi Everyone,
I apologize for the email. I figured it out so please disregard this last
email.
Thanks,
Jake
From: jacobwilt...@hotmail.com
To: gtk-app-devel-list@gnome.org
Subject: GGtk-CRITICAL **: gtk_label_set_text: assertion `GTK_IS_LABEL (label)`
failed
Date: Wed, 28 Jan 2009 20:16:47 -0700
Hello everyone,
I am currently developing my first GTK+ GUI using glade to initiate bus master
DMA. The GUI is set to take DMA transfer specifics (payload, number of
packets, etc). Based on these inputs, I need to set a label or text box
showing the total amount of bytes to be transferred from an add in card to the
chipset.
The GUI loads fine. When the user changes payload, the handler is called and
inside the handler is a call to change the bytes to be transfered label/text
widget. When this call is made, a failure is reported to the console saying it
failed to set the text. I have tried both a textview widget and also a label
widget without success. The main file is a C++ file that will call other C++
functions to run the DMA transfer. I use extern "C" {} around each handler and
function prototypes and I haven't seen an issue doing this yet.
Below is the code used:
// HANDLER:
void on_wr_tlp_size_changed(GtkComboBox *wr_size, xbmd_app *app) {
wr_tlp_size = gtk_combo_box_get_active_text(wr_size);
gtk_label_set_text(GTK_LABEL(app->write_bytes_to_transfer), "TEST");
//this is the line that is failing.
}
Below is more of the code:
// declaring the widget structure so each widget can be accessed within handlers
typedef struct
{
GtkWidget *write_bytes_to_transfer;
} xbmd_app;
int
main (int argc, char *argv[])
{
xbmd_app *app;
/* allocate the memory needed by our TutorialTextEditor struct */
app = g_slice_new (xbmd_app);
/* initialize GTK+ libraries */
gtk_init (&argc, &argv);
if (init_app (app) == FALSE) return 1; /* error loading UI */
/* show the window */
gtk_widget_show (app->window);
/* enter GTK+ main loop */
gtk_main ();
/* free memory we allocated for TutorialTextEditor struct */
g_slice_free (xbmd_app, app);
return 0;
}
partial code:
gboolean
init_app (xbmd_app *app)
{
app->write_bytes_to_transfer = GTK_WIDGET (gtk_builder_get_object
(builder,
"wr_bytes_to_trans"));
Any assistance is appreciated.
Thanks,
Jake
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