I have written a custom tkinter widget, TooltipLabel. When the cursor enters the label, it pops up a text widget that displays text. On windows, this works. But once I tested it on macos, the tooltip would not popup, even though the method to do so is getting called
I tried using this solution, but it didn't help.
Here's the PoC:
import math
import tkinter as tk
from tkinter import ttk
class Tooltip(object):
"""This widget adds a tooltip to a given widget, that displays when the cursor hovers over it"""
def __init__(self, widget):
self.widget = widget
self.tooltip = None
self.text = None
#end init
def show_tooltip(self, text):
self.text = text
if self.tooltip or not self.text:
return
x, y, cx, cy = self.widget.bbox("insert")
x = x + self.widget.winfo_rootx() + 45
y = y + cy + self.widget.winfo_rooty() + 30
self.tooltip = tooltip_window = tk.Toplevel(self.widget)
tooltip_window.wm_overrideredirect(1) # removes the default window hide/maximize/close buttons
tooltip_window.wm_geometry("+%d+%d" % (x, y))
self._add_tooltip_text(tooltip_window)
#end show_tooltip
def hide_tooltip(self):
tooltip_window = self.tooltip
self.tooltip = None
if tooltip_window:
tooltip_window.destroy()
#end hide_tooltip
def _add_tooltip_text(self, tooltip_window):
tooltip = tk.Text(tooltip_window, relief=tk.SOLID, width=40, wrap=tk.WORD)
height = math.ceil(len(self.text) / 40) + self.text.count('\n')
tooltip.insert(tk.END, self.text)
tooltip.config(state=tk.DISABLED, height=height)
tooltip.pack(ipadx=1)
#end _add_tooltip_text
#end class Tooltip
def add_tooltip(widget, text):
tooltip = Tooltip(widget)
def enter(event):
print(event)
print(event.widget)
print("Tooltip: %s" % text)
tooltip.show_tooltip(text)
#end enter
def leave(event):
tooltip.hide_tooltip()
#end leave
widget.bind('<Enter>', enter)
widget.bind('<Leave>', leave)
#end add_tooltip
class TooltipLabel(ttk.Label):
"""This widget extends ttk.Label, and displays a tooltip when the cursor hovers over it"""
def __init__(self, parent, tooltip_dict_key, **kwargs):
ttk.Label.__init__(self, parent, **kwargs)
self.parent = parent
self.tooltip_text = None
self.fetch_tooltip_text(tooltip_dict_key)
add_tooltip(self, self.tooltip_text)
#end init
def fetch_tooltip_text(self, tooltip_dict_key):
self.tooltip_text = "Testing tooltip"
#end fetch_tooltip_text
#end class TooltipLabel
def main():
root = tk.Tk()
label = TooltipLabel(root, "tooltip_dict_key", text="testing")
label.pack()
root.mainloop()
if __name__ == "__main__":
main()
I would expect the tooltip to pop up and display the text "Testing tooltip". This doesn't happen even though the event fires.
The output I get from the print statements:
<Enter event focus=False x=43 y=20>
.!tooltiplabel
Tooltip: Testing tooltip
