Creating custom tooltips in Python with Tkinter
Python Tkinter Custom Widgets and Themes: Exercise-9 with Solution
Write a Python program that implements custom tooltips for widgets like buttons or labels that display additional information when hovered over using Tkinter.
Sample Solution:
Python Code:
import tkinter as tk
class CustomTooltip:
def __init__(self, widget, text):
self.widget = widget
self.text = text
self.tooltip_visible = False
# Bind events to show/hide the tooltip
widget.bind("<Enter>", self.show_tooltip)
widget.bind("<Leave>", self.hide_tooltip)
def show_tooltip(self, event):
if not self.tooltip_visible:
x, y, _, _ = self.widget.bbox("insert")
x += self.widget.winfo_rootx() + 25
y += self.widget.winfo_rooty() + 25
self.tooltip_label = tk.Label(text=self.text, background="lightyellow", relief="solid", borderwidth=1)
self.tooltip_label.place(x=x, y=y)
self.tooltip_visible = True
def hide_tooltip(self, event):
if self.tooltip_visible:
self.tooltip_label.place_forget()
self.tooltip_visible = False
if __name__ == "__main__":
root = tk.Tk()
root.title("Custom Tooltip Example")
button = tk.Button(root, text="Hover Me")
button.pack(padx=20, pady=20)
tooltip = CustomTooltip(button, "This is a custom tooltip")
root.mainloop()
Explanation:
In the exercise above -
- Define a "CustomTooltip" class to manage and display tooltips for a given widget.
- The constructor init takes two arguments: the 'widget' for which the tooltip is intended (widget) and the 'text' to be displayed in the tooltip (text).
- With the "show_tooltip()" method, we calculate the position (x, y) of the tooltip relative to the widget, and then create a label (tooltip_label) to display the tooltip text with a light yellow background, solid relief, and a border width of 1. This label is placed at the calculated position, making it visible.
- The "hide_tooltip()" method hides the tooltip label using the place_forget method.
- Create a main Tkinter window (root) and a button widget (button) with the text "Hover Me."
- A CustomTooltip instance is created, assigning the tooltip text to the button and associating it with the tooltip.
- Finally, start the Tkinter main loop with "root.mainloop()" and when you hover over the button, a custom tooltip appears with the specified text.
Output:
Flowchart:
Python Code Editor:
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