Textfield with ui

Python567

I want to design a text field for my simple calculator, so a textfield where I can write number in. I found that here https://omz-software.com/pythonista/docs/ios/ui.html#textfield but I don‘t know where I beginn?

cvp

@Python567 start from here

import ui
tf = ui.TextField()
tf.name = 'example for @Python567'
tf.frame = (0,0,300,32)
tf.keyboard_type = ui.KEYBOARD_DECIMAL_PAD
tf.present('sheet')
tf.begin_editing()

Python567

Oh, thanks. But two question.

For what is the „tf“ ?
And there I can write something else in? For example „TextField.action = ...“ ?

cvp

@Python567
tf is the name you give to your TextField

to set something in iT, use the text attribute

tf.text = 'your text'

Python567

Ok and where/how can I define that for example:

if textfield == „Test123“:
    print („Hello“)

cvp

@Python567 it depends: if you want to test that during introduction of data or at end...

cvp

@Python567 try this and press enter at end of typing Test123

import ui
tf = ui.TextField()
tf.name = 'example for @Python567'
tf.frame = (0,0,300,32)
tf.keyboard_type = ui.KEYBOARD_DECIMAL_PAD
tf.text = ''
def tf_action(sender):
	if sender.text == "Test123":
		print("Hello")
tf.action = tf_action
tf.present('sheet')
tf.begin_editing()

cvp

@Python567 you can use also this

tf.placeholder = 'Your own explanation'

test it

Python567

Oh thanks, i test it

Python567

I have here a programm which can find out all prime numbers. But I have the Problem, that I only can print the result in the console. I write tf.text = Right but it don‘t works why? I get a error with strand int. But I don‘t know how to fix that.

import ui

dialog = ui.View()


tf = ui.TextField()
tf.name = 'Test'
tf.frame = (50,50,1000,100)
tf.keyboard_type = ui.KEYBOARD_DECIMAL_PAD
tf.text = ''
tf.placeholder = 'Gib was ein!'

def primzahl():
  p = int(tf.text)
  i = 2
  istPrimzahl = True 
  teiler = 0
  
  while (i < p):
    if p % i == 0:
  			istPrimzahl = False
  			teiler = i 
  			break 
    i += 1
			
  if istPrimzahl:
    	tf.text = 'Die Zahl', p , 'ist eine Primzahl.'
			
  else:
    	print ("Die Zahl",p, "ist keine Primzahl, weil sie durch " , i , " teilbar ist.") 
    	
    	
def tf_action(sender):
	primzahl()
  


tf.action = tf_action

dialog.add_subview(tf)

ebutton = ui.Button()

ebutton.title = '='
ebutton.frame = (50,200,1000,100)
ebutton.background_color = "red"
def ebutton_action(sender):
	tf.text = "gedrückt!"
	
ebutton.action = ebutton_action

menubutton = ui.ButtonItem()
menubutton.title = 'fghjk'
dialog.right_button_items = [menubutton]


dialog.add_subview(ebutton)
dialog.present('fullscreen')
tf.begin_editing()
#sheet

cvp

@Python567 try already with

        tf.text = 'Die Zahl ' + str(p) + ' ist eine Primzahl.'

Python567

No, thanks:)

cvp

@Python567 said:

No

Why no?

Python567

@cvp Sorry, I wanna write a first something else wich beginn with „no“. 😐

cvp

@Python567 no problem 😉

ccc

F-strings (tf.text = f'Die Zahl {p} ist eine Primzahl.') are a single instruction in Python bytecode.
This makes them faster and more efficient than legacy string formatting https://www.scivision.dev/python-f-string-speed
Improved readability is also a clear value.

MrEVandQuestions

@cvp that code works cool but what if I want to use it without presenting, the keyboard shortcuts?

cvp

@MrEVandQuestions said:

use it without presenting, the keyboard

Remove the line

tf.begin_editing()

MrEVandQuestions

OK. Thanks!