5d55d41f34
tkinter rejects Cyrillic chars in bind(). Use keycode-based <Control-Key> dispatch instead (same approach as terminal_widget). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
"""
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Ctrl+Z / Ctrl+Y undo/redo for CTkEntry widgets.
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tk.Entry has no built-in undo, so we track history manually.
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"""
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def enable_undo(ctk_entry):
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"""Add Ctrl+Z undo and Ctrl+Y redo to a CTkEntry widget."""
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entry = ctk_entry._entry
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history = [entry.get()]
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redo_stack = []
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_recording = [True]
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def _snapshot(*_args):
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if not _recording[0]:
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return
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val = entry.get()
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if not history or history[-1] != val:
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history.append(val)
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redo_stack.clear()
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# Cap history size
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if len(history) > 200:
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del history[:100]
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def _undo(event):
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if len(history) > 1:
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redo_stack.append(history.pop())
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_recording[0] = False
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entry.delete(0, "end")
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entry.insert(0, history[-1])
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_recording[0] = True
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elif history:
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redo_stack.append(history.pop())
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_recording[0] = False
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entry.delete(0, "end")
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_recording[0] = True
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return "break"
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def _redo(event):
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if redo_stack:
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val = redo_stack.pop()
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history.append(val)
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_recording[0] = False
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entry.delete(0, "end")
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entry.insert(0, val)
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_recording[0] = True
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return "break"
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def _on_ctrl_key(event):
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"""Route Ctrl+key by physical keycode (layout-independent)."""
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if event.keycode == 90: # Z
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return _undo(event)
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if event.keycode == 89: # Y
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return _redo(event)
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return None
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entry.bind("<KeyRelease>", _snapshot, add="+")
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entry.bind("<Control-z>", _undo)
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entry.bind("<Control-y>", _redo)
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entry.bind("<Control-Key>", _on_ctrl_key)
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