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2009-10-04
, 19:04
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Posts: 110 |
Thanked: 215 times |
Joined on Apr 2008
@ Earth, 38.830000, -77.00000
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#2
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Originally Posted by rajasekaran
this should be:
Iam using Glade for GUI building and Gtkbuilder for connecting signals.
As a newbie i got confused with the parameter type of 'data' in the code
Code:gtk_builder_connect_signals( builder, data);
Code:
gtk_builder_connect_signals( builder, (gpointer*)data);
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2009-10-04
, 19:44
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Posts: 6 |
Thanked: 0 times |
Joined on Sep 2009
@ Finland
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#3
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thanks for the reply...
i solved the bug .. it was a mistake in the button clicked callback function input arguments. there is no eventexpose parameter passed in button click callback. when i deleted the 2nd input argument things worked.
i solved the bug .. it was a mistake in the button clicked callback function input arguments. there is no eventexpose parameter passed in button click callback. when i deleted the 2nd input argument things worked.
As a newbie i got confused with the parameter type of 'data' in the code
/* Main data structure definition */ typedef struct _ChData ChData; struct _ChData { /* Widgets */ GtkWidget *window1; /* Main application window */ GtkWidget *label1; GtkWidget *label2; GtkWidget *label3; GtkWidget *label4; }; #endif /* __SUPPORT_H__ */Main window has a button and i need to update label4 upon the click of the button . as show below
G_MODULE_EXPORT gboolean button1_clicked_cb( GtkWidget *widget, GdkEventExpose *event, ChData *data ) { g_print ("DAQ started now\n"); gtk_label_set_text (GTK_LABEL(data->label4), g_strdup_printf ("DAQ started now")); return( TRUE ); }All the code compiles without error
but when i run it
g_print is working but gtk_label runs into segmentation fault!!
Can some one throw some light on passing UI data to callbacks?
Last edited by rajasekaran; 2009-09-30 at 20:21.