Size/length of a trackbar name in opencv

Question

When I try the following code:

namedWindow("My Window");
createTrackbar("Crop my picture", "My Window", &crop, 239);

the Track bar name that it is created in "My Window" looks like this:
"Crop n...re"

How can i do to show the complete name?

Thanks

OpenCV Highui module is intended for debugging purposes only. If you need some good looking GUI, you should use a GUI library (e.g. Qt). It's pointless to make Highgui stuff looking good. — Miki, Oct 04 '16 at 08:32
Thanks for the answer I thought that being able to show a three words name did not fall into good looking GUI, :-) Any other idea anyone? — ssr, Oct 04 '16 at 10:44

score 1 · Answer 1 · answered Oct 04 '16 at 13:51

1

It looks like the window that you've created your trackbar on is too small, especially if you're showing a small Mat object on that window.

Create a new window:

namedWindow("My_Window",WINDOW_AUTOSIZE);

This way, you'll be able to maximize it

answered Oct 04 '16 at 13:51

Saransh Kejriwal

2,467
5
15
39

2

The length of the trackbar text does not change, so i can still only see "Crop n...re" – ssr Oct 04 '16 at 17:29

score 0 · Answer 2 · answered Sep 14 '18 at 08:25

0

You can use \n to insert a line break. It helps a little, but not too much, as you can see in the example below: the third label was set to "gamma\nconstant".

(Note: I'm using opencv 3.4.2 in python 3.6.)

answered Sep 14 '18 at 08:25

Gustavo Kaneto

643
7
17

Size/length of a trackbar name in opencv

2 Answers2