GTK+ dynamic text display.

[thoeeng]

Hi, all.
I am very new to GTK+ 2.0. I just started to use it to build a very simple GUI for my robot under Ubuntu 7.10. I am trying to get the GTK+ to display my robot's sensors data at certain time intervals. Right now, I am using gtk_entry_get_text() and it can only displays once after the GUI is launched and the program waits at gtk_main().

I tried to create a timer handler to update the sensor data at 5Hz rate or even use another thread to do it, but the text won't change. It is always showing the very first text displayed when GUI is launched.

As I am very new to this GUI and do not wish to spend too much time in complicated GUI design as it is not my focus, is there a simple solution to dynamic numeric data display?

Appreciate any help and advice. Thanks.

Regards
Ken

[Rubberman]

This should be posted to either the X-Windows or Programming forum. In any case, we would need an example of your code to say what the problem might be. Remember that GTK is event-driven. If you don't provide an event to your GTK program that triggers an update callback, then it won't show the changes on the screen.

[oz]

This should be posted to either the X-Windows or Programming forum.

...thread moved to more appropriate forum.

[tetsujin]

Hi, all.
I am very new to GTK+ 2.0. I just started to use it to build a very simple GUI for my robot under Ubuntu 7.10. I am trying to get the GTK+ to display my robot's sensors data at certain time intervals. Right now, I am using gtk_entry_get_text() and it can only displays once after the GUI is launched and the program waits at gtk_main().

I tried to create a timer handler to update the sensor data at 5Hz rate or even use another thread to do it, but the text won't change. It is always showing the very first text displayed when GUI is launched.

I am fairly new to GTK myself - and I don't know the exact answer to your question... but here is what I can tell you...

I'm not sure how you're using gtk_entry_get_text(), first off - are you using it to retrieve the pointer to the widget's internal text storage, and then store the new text there? If so, I think you're not supposed to do that. Try gtk_entry_set_text() instead... From what I can tell, that should be sufficient. If not, then you may have to call gtk_widget_show() to get the widget to redraw...