pythonista UIで簡単なキーボードアプリを作ろうとしています。

textviewでのカーソルの移動（→、←、↑、↓、文末まで戻る、文字の削除）だけをできるアプリを考え中です。

UIでのコードの紐付けと、カーソル自体のコードが判らなくて困っています。

このアプリは、全盲の嫁が使用するiPhoneでの使用予定です。

iPhoneでは、テキスト入力の際、カーソルの移動（進む、戻る）がない為に、アクセシビリティの音声機能を使用すると、文字入力を間違えてしまうと、そこまで削除しないといけないという状態になり、（音声がかかった状態では、3DTouchの機能が使いにくい）それでは、キーボードを切り替えて、カーソルを移動すれば？と思いついた次第です。

制作は主にiPad上での、pythonistaでの制作が主となっていますり

週末での僅かな時間での勉強、制作ですので、なかなか思うようにいかず、困っています。

どなたか、教えて頂けないでしょうか？

宜しくお願いします。

以前、こういうのを探しだして試したところ、buttonが定義されていないとのないようのエラーが出ました。

出先からの投稿ですので、詳細なエラーメッセージは後で載せますが、どこが悪いのかが、さっぱりわかりません。

-- coding: utf-8 --

import ui

DEFAULT_TEXT = "w\n\nw w WWWW w w\n\nw"
DEFAULT_LEN = len(DEFAULT_TEXT)
DEFAULT_MID = DEFAULT_LEN/2
DEFAULT_RNG = (DEFAULT_MID, DEFAULT_MID)

class KBControlDelegate(object):
def init(self):
self.bksp = False

def keypress(self, key):
    out.text += key + " "

def textview_should_change(self, textview, range, replacement):
    if replacement == "":
        # some deletion
        if range == (DEFAULT_MID-1, DEFAULT_MID):
            self.keypress("bksp")
    elif len(replacement) > 1:
        # paste
        self.keypress("cmd-v")
    else:
        self.keypress(replacement)
    return False

def textview_did_change_selection(self, textview):
    nop = False
    if len(ctrl.text) == DEFAULT_LEN:
        # no change to text, only selection
        if ctrl.selected_range == DEFAULT_RNG:
            # no important changes, cursor was likely reset by script
            nop = True
        elif ctrl.selected_range[0] == ctrl.selected_range[1]:
            # shift was not used
            if ctrl.selected_range == (0, 0):
                # cursor is at the top
                self.keypress("cmd-up")
            elif ctrl.selected_range in ((1, 1), (2, 2)):
                # cursor is near the top
                self.keypress("up")
            elif ctrl.selected_range == (3, 3):
                # cursor is at the left
                self.keypress("cmd-left")
            elif ctrl.selected_range == (DEFAULT_LEN/2-2, DEFAULT_LEN/2-2):
                # cursor is exactly two chars to the left
                self.keypress("alt-left")
            elif ctrl.selected_range == (DEFAULT_LEN/2-1, DEFAULT_LEN/2-1):
                # cursor is exactly one char to the left
                self.keypress("left")
            elif ctrl.selected_range == (DEFAULT_LEN/2+1, DEFAULT_LEN/2+1):
                # cursor is exactly one char to the right
                self.keypress("right")
            elif ctrl.selected_range == (DEFAULT_LEN/2+2, DEFAULT_LEN/2+2):
                # cursor is exactly two chars to the right
                self.keypress("alt-right")
            elif ctrl.selected_range == (DEFAULT_LEN-3, DEFAULT_LEN-3):
                # cursor is at the right
                self.keypress("cmd-right")
            elif ctrl.selected_range in ((DEFAULT_LEN-2, DEFAULT_LEN-2), (DEFAULT_LEN-1, DEFAULT_LEN-1)):
                # cursor is near the bottom
                self.keypress("down")
            elif ctrl.selected_range == (DEFAULT_LEN, DEFAULT_LEN):
                # cursor is at the bottom
                self.keypress("cmd-down")
            else:
                # some unhandled movement
                nop = True
                self.keypress(str(ctrl.selected_range))
        else:
            # shift was used
            if ctrl.selected_range == (0, DEFAULT_MID):
                # cursor is at the top
                self.keypress("shift-cmd-up")
            elif ctrl.selected_range in ((1, DEFAULT_MID), (2, DEFAULT_MID)):
                # cursor is near the top
                self.keypress("shift-up")
            elif ctrl.selected_range == (3, DEFAULT_MID):
                # cursor is at the left
                self.keypress("shift-cmd-left")
            elif ctrl.selected_range == (DEFAULT_LEN/2-2, DEFAULT_MID):
                # cursor is exactly two chars to the left
                self.keypress("shift-alt-left")
            elif ctrl.selected_range == (DEFAULT_LEN/2-1, DEFAULT_MID):
                # cursor is exactly one char to the left
                self.keypress("shift-left")
            elif ctrl.selected_range == (DEFAULT_MID, DEFAULT_LEN/2+1):
                # cursor is exactly one char to the right
                self.keypress("shift-right")
            elif ctrl.selected_range == (DEFAULT_MID, DEFAULT_LEN/2+2):
                # cursor is exactly two chars to the right
                self.keypress("shift-alt-right")
            elif ctrl.selected_range == (DEFAULT_MID, DEFAULT_LEN-3):
                # cursor is at the right
                self.keypress("shift-cmd-right")
            elif ctrl.selected_range in ((DEFAULT_MID, DEFAULT_LEN-2), (DEFAULT_MID, DEFAULT_LEN-1)):
                # cursor is near the bottom
                self.keypress("shift-down")
            elif ctrl.selected_range == (DEFAULT_MID, DEFAULT_LEN):
                # cursor is at the bottom
                self.keypress("shift-cmd-down")
            else:
                # some unhandled movement
                nop = True
                self.keypress(str(ctrl.selected_range))
        
    elif len(ctrl.text) == DEFAULT_LEN - 1:
        # exactly one character was removed
        # due to the nature of bksp, this is only triggered for delete (fn-bksp)
        self.keypress("del")
    elif len(ctrl.text) < DEFAULT_LEN:
        # more than one character was deleted, i. e. alt-bksp
        self.keypress("alt-bksp")
    elif len(ctrl.text) > DEFAULT_LEN:
        # one or more characters were added and not handled by should_change
        # i. e. sticky key/accentuation character, need manual reset of control field
        # accented chars can still be typed
        pass
    else:
        # some unknown situation
        out.text += "\nSome unhandled situation: " + ctrl.selected_range + "\n" + ctrl.text + "\n\n"
    
    if not nop:
        ctrl.text = DEFAULT_TEXT
        ctrl.selected_range = DEFAULT_RNG

def run():
global root
global ctrl
global out
root = ui.load_view()
ctrl = root["ctrl"]
out = root["out"]
ctrl.delegate = KBControlDelegate()

root.present("sheet")

if name == "main":
run()

このようなエラーメッセージがでました。
しかも、2つ同時にです。

Warning: Could not bind action: name 'buttontap_up' is not defined
Warning: Could not bind action: name 'buttontap_left' is not defined
Warning: Could not bind action: name 'buttontap_right' is not defined
Warning: Could not bind action: name 'buttontap_return' is not defined
Warning: Could not bind action: name 'buttontap_down' is not defined
Warning: Could not bind action: name 'bottontap_backspace' is not defined
Warning: Could not bind action: unexpected EOF while parsing (<string>, line 1)
Warning: Could not bind action: name 'buttontap_up' is not defined
Warning: Could not bind action: name 'buttontap_left' is not defined
Warning: Could not bind action: name 'buttontap_right' is not defined
Warning: Could not bind action: name 'buttontap_return' is not defined
Warning: Could not bind action: name 'buttontap_down' is not defined
Warning: Could not bind action: name 'bottontap_backspace' is not defined
Warning: Could not bind action: unexpected EOF while parsing (<string>, line 1)