def Undo Action
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last edited byHow to define undo function in Pythonista
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last edited by
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last edited by@avinashsah if keyboard, see here
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last edited by@avinashsah here is a rough example of a redo/undo delegate. from what i could find online you have to create your own.
@cvp if you dont mind, fom your experience, is this how you would do it?
from ui import * class redo_undo: def __init__(self, main, *args, **kwargs): # undo/redo View self.history_view = TextView( text='HISTORY', frame=(25, 275, 600, 400), editable=False, background_color='#dedede') main.add_subview(self.history_view) # Undo Button undo_btn=Button() undo_btn.frame=(25, 2, 100, 46) undo_btn.background_color='#686868' undo_btn.tint_color='#000000' undo_btn.title='undo' undo_btn.action=self.undo main.add_subview(undo_btn) # Redo Button redo_btn=Button() redo_btn.frame=(127, 2, 100, 46) redo_btn.background_color='#686868' redo_btn.tint_color='#000000' redo_btn.title='redo' redo_btn.action=self.redo main.add_subview(redo_btn) self.history=[] self.current_index=len(self.history) self.textview=None def append(self, text): if self.current_index < len(self.history): self.history=self.history[:self.current_index] self.current_index=len(self.history) self.history.append(text) self.current_index+=1 self.update_history(self.current_index) def update_history(self, index): self.history_view.text='' i=0 for x in self.history: if i == index: self.history_view.text+=str(i)+' '+x+' <--'+'\n' elif x == self.history[-1] and index == len(self.history): self.history_view.text+=str(i)+' '+x+' <--'+'\n' else: self.history_view.text+=str(i)+' '+x+'\n' i+=1 def redo(self, sender): if self.current_index == len(self.history): return if self.current_index < len(self.history): self.current_index+=1 self.textview.text = self.history[self.current_index-1] self.update_history(self.current_index-1) def undo(self, sender): if self.current_index == 0: return self.current_index-=1 self.textview.text = self.history[self.current_index-1] self.update_history(self.current_index-1) def textview_should_begin_editing(self, textview): if textview.text=='INPUT TEXT ..': textview.text='' self.textview=textview return True def textview_did_change(self, textview): self.append(textview.text) self.update_history(self.current_index) pass class Main(View): def __init__(self, *args, **kwargs): # Main Window self.width = 650 self.height = 1000 self.background_color="#8b8b8b" self.update_interval=1 # Text Input Window self.tv = TextView( text='INPUT TEXT ..', frame=(25, 50, 600, 200), background_color='#dedede') self.add_subview(self.tv) self.tv.delegate=redo_undo(self) if __name__ == '__main__': Main().present('sheet', hide_title_bar=True)
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last edited by@stephen said:
is this how you would do it?
Sincerely, I don't know. And it is really better to ask an advice to @mikael , I'm far from to be a champion of Python. 😢
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last edited by
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last edited by@cvp, I think @stephen was asking your opinion on how (= approach) you would implement a history function, not how (= style) we would code Python.
I see no issues with the approacj, but would of course rather rely in the built-in undo, especially now that it is more convenient with the three-finger tap.
Interesting question of course how you could tap into that functionality from your own custom button.
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last edited by@mikael tjank you. I could not find anywhere a way to tap into the “global” buffer if that even exists lol. But if you don’t see anything wrong or too taboo then it should cover OP’s request.
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last edited by@stephen, ”too taboo” – has a nice ring to it. 😁
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last edited by@mikael said:
would of course rather rely in the built-in undo, especially now that it is more convenient with the three-finger tap.
I agree
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last edited by@mikael 😂 I just read that like 20 times..
I agree i on using built in though we still are unsure of OP's use case. might be trying to create their own keyboard. but it was fun troubleshooting that little delegate class lol
