for a project I have built on a Tkinter based GUI, I would like to run it on a touch display.

Does anyone know a way or a way to have an on-screen keyboard, that is installed on a Raspberry Pi, that open up when an input field is clicked in the gui ?

I would be very grateful for any input

CodePudding user response：

You might have to do some correction regarding the spacing in the code because StackOverFlow, doesn't support pasting the code "Wide".

Here is total code for on-screen Keyboard using tkinter model in python :-

from tkinter import *
import ttkthemes as td
from tkinter import ttk


def select(value):
    if value == 'Space':
        textarea.insert(INSERT, ' ')

    elif value == 'Enter':
        textarea.insert(INSERT, '\n')

    elif value == 'Tab':
        textarea.insert(INSERT, '\t')

    elif value == 'Del':
        textarea.delete(1.0, END)

    elif value == 'Backs':
        i = textarea.get(1.0, END)
        newtext = i[:-2]

        textarea.delete(1.0, END)
        textarea.insert(INSERT, newtext)

    elif value == 'Shift ↑':
        varRow = 2
        varColumn = 0

        for button in leftShiftButtons:

            command = lambda x=button: select(x)
            if button != 'Space':
                ttk.Button(root, text=button, command=command, width=10, 
                ).grid(row=varRow, column=varColumn)

            varColumn  = 1
            if varColumn > 14:
                varColumn = 0
                varRow  = 1

    elif value == '↑ Shift':
        varRow = 2
        varColumn = 0

        for button in buttons:

            command = lambda x=button: select(x)
            if button != 'Space':
                ttk.Button(root, text=button, command=command, width=10, 
                ).grid(row=varRow, column=varColumn)

            varColumn  = 1
            if varColumn > 14:
                varColumn = 0
                varRow  = 1

    elif value == 'Caps':

        varRow = 2
        varColumn = 0

        for button in capsButtons:

            command = lambda x=button: select(x)
            if button != 'Space':
                ttk.Button(root, text=button, command=command, width=10, 
                ).grid(row=varRow, column=varColumn)

            varColumn  = 1
            if varColumn > 14:
                varColumn = 0
                varRow  = 1

    elif value == 'CAPS':

        varRow = 2
        varColumn = 0

        for button in buttons:

            command = lambda x=button: select(x)
            if button != 'Space':
                ttk.Button(root, text=button, command=command, width=10, 
                ).grid(row=varRow, column=varColumn)

            varColumn  = 1
            if varColumn > 14:
                varColumn = 0
                varRow  = 1


    else:
        textarea.insert(INSERT, value)

    textarea.focus_set()


root = td.ThemedTk()
root.get_themes()
root.set_theme('aquativo')
root.title('On-Screen Keyboard created by Faizan Khan')
root.config(bg='whitesmoke')
root.resizable(0, 0)

titleLabel = Label(root, text='On-Screen Keyboard', font=('arial', 20, 'bold'), 
             bg='whitesmoke', fg='gray30')
titleLabel.grid(row=0, columnspan=15)

textarea = Text(root, font=('arial', 15, 'bold'), height=10, width=100, 
           wrap='word',bd=8,relief=SUNKEN)
textarea.grid(row=1, columnspan=15)
textarea.focus_set()

buttons = ['`', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 
          'Backs', 'Del',
           'Tab', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', '7', 
            '8', '9',
           'Caps', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', 'Enter', 
           '4', '5', '6',
           'Shift ↑', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', '↑ 
            Shift', '1', '2', '3',
            'Space']

leftShiftButtons = ['~', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', 
                   ' ', 'Backs', 'Del',
                    'Tab', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 
                     ']', '7', '8', '9',
                    'Caps', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ':', 
                    'Enter', '4', '5', '6',
                    'Shift ↑', 'z', 'x', 'c', 'v', 'b', 'n', 'm', '<', '>', '?', 
                    '↑ Shift', '1', '2', '3',
                    'Space'

                    ]

capsButtons = ['`', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 
             'Backs', 'Del',
               'Tab', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '[', 
               '7', '8', '9',
               'CAPS', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ';', 
                'Enter', '4', '5', '6',
               'Shift ↑', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', ',', '.', '/', '↑ 
                Shift', '1', '2', '3',
               'Space']

varRow = 2
varColumn = 0

for button in buttons:

    command = lambda x=button: select(x)
    if button != 'Space':
        ttk.Button(root, text=button, command=command, width=10 
        ).grid(row=varRow, column=varColumn)

    if button == 'Space':
        ttk.Button(root, text=button, command=command, width=30, ).grid(row=6, 
        column=0, columnspan=14)

    varColumn  = 1
    if varColumn > 14:
        varColumn = 0
        varRow  = 1

root.mainloop()