67 lines
1.8 KiB
Python
67 lines
1.8 KiB
Python
import tkinter as tk
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class ToolTip:
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"""Lightweight tooltip that appears after a delay when hovering a widget.
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Usage:
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ToolTip(widget, "help text", delay=1000)
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"""
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def __init__(self, widget, text, delay=1000):
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self.widget = widget
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self.text = text
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self.delay = delay
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self._id = None
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self._tipwindow = None
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widget.bind("<Enter>", self._on_enter, add=True)
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widget.bind("<Leave>", self._on_leave, add=True)
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widget.bind("<ButtonPress>", self._on_leave, add=True)
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def _on_enter(self, _event=None):
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self._schedule()
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def _on_leave(self, _event=None):
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self._unschedule()
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self._hide()
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def _schedule(self):
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self._unschedule()
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self._id = self.widget.after(self.delay, self._show)
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def _unschedule(self):
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if self._id:
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try:
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self.widget.after_cancel(self._id)
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except Exception:
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pass
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self._id = None
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def _show(self):
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if self._tipwindow or not self.text:
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return
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x = self.widget.winfo_rootx() + 20
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y = self.widget.winfo_rooty() + self.widget.winfo_height() + 5
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tw = tk.Toplevel(self.widget)
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tw.wm_overrideredirect(True)
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tw.wm_geometry(f"+{x}+{y}")
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lbl = tk.Label(
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tw,
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text=self.text,
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justify="left",
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background="#ffffe0",
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relief="solid",
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borderwidth=1,
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font=(None, 9),
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)
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lbl.pack(ipadx=4, ipady=2)
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self._tipwindow = tw
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def _hide(self):
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if self._tipwindow:
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try:
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self._tipwindow.destroy()
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except Exception:
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pass
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self._tipwindow = None
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