How to get the width in characters of a Kivy TextInput or Label

Question

I have a TextInput in Kivy with long content. I want to know the width of the TextInput in characters. In other words, the length of the lines?

textinput = TextInput(text="Open source Python library for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps")

enter image description here

How about using `cursor_col` & `cursor_row`: http://kivy.org/docs/api-kivy.uix.textinput.html#kivy.uix.textinput.TextInput.cursor_col ? — Iron Fist, Jul 06 '15 at 02:21
@KhalilAmmour-خليلعمور I think cursor_col gives you the position of cursor not the width of the line. — Assem, Jul 06 '15 at 09:13
yes that's my point, do a combination check between `cursor_col` & `cursor_row` to store value of `cursor_col` and or next new line when `cursor_row` = +1 then that should be the length of the line, did you get my point here? — Iron Fist, Jul 06 '15 at 12:32
I got your point, this is a hack. but not sure if it works well. — Assem, Jul 06 '15 at 13:40
Well then, may be you can implement it as function and post it for kivy module... :) — Iron Fist, Jul 06 '15 at 13:42

score 1 · Answer 1 · answered Jul 06 '15 at 20:19

1

You can check lines of TextInput using its _lines property. To get their lengths use len() builtin:

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout

from kivy.lang import Builder

Builder.load_string("""

<MyWidget>:
    Button:
        text: "Print width"
        on_press: print([len(line) for line in ti._lines])
    TextInput
        text: "Open source Python library for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps"
        id: ti
""")

class MyWidget(BoxLayout):
    pass

class MyApp(App):
    def build(self):
        return MyWidget()

if __name__ == '__main__':
    MyApp().run()

answered Jul 06 '15 at 20:19

Nykakin

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Thank you . That gives the number of characters in that line not the total width. – Assem Jul 06 '15 at 20:30
1

You can't get total value since characters doesn't have fixed widths, for example . character has smaller width than X. Use that code to compare width of lines that consist only of . and X characters. – Nykakin Jul 06 '15 at 20:38

score 0 · Answer 2 · edited Mar 28 '22 at 07:52

0

Just to improve this discussion: In TextInput._lines_labels is field size (tuple) [0] with width of line. Each line. Just to iterate and look for the biggest and 'voilà'. This works with any font (prop or not).

Radek

edited Mar 28 '22 at 07:52

Guy Avraham

3,482
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answered Mar 28 '22 at 00:37

Radek Glebicki

1

How to get the width in characters of a Kivy TextInput or Label

2 Answers2