Default value bug

[ppoliziani]

Hi @Akascape,

I've noticed that when adding a command to the dropdown the command executes but the dropdown no longer updates showing the user which value was selected. For example:

from CTkScrollableDropdown import *
import customtkinter

root = customtkinter.CTk()
def hello(e):
    hellos = {"Italy": "Ciao",
              "Germany": "Hallo",
              "England": "Hello"}

    print(hellos[e])

countries = ["Italy", "Germany", "England"]

country_options = customtkinter.CTkComboBox(root)
country_options.pack()
CTkScrollableDropdown(attach=country_options, values=countries, autocomplete=True, alpha=1, command=hello)

root.mainloop()

This will print the correct hello for each selected language but the dropdown does not update to the chosen language.

[ppoliziani]

Hi @Akascape,

A possible solution for the issue I mentioned yesterday is as follows. Kindly verify if this is a fix.

Problem:
When setting a command it seems as though the self.command variable in CTKScrollableDropdown is being occupied with the bounded method to the command a user passes. This means that when _init_buttons() attempts to initialise the options in the drop down, it was not bounding it to the command for the buttons that updates the dropdown.

Fix:
To fix this I created a new variable called method_command that a user would pass in their CTkScrollableDropdown object call to prevent the dropdown self.command variable from being bounded. And removed the command=None from the init method.

The init() method:

 def __init__(self, attach, x=None, y=None, button_color=None, height: int = 200, width: int = None,
                 fg_color=None, button_height: int = 20, justify="center", scrollbar_button_color=None,
                 scrollbar=True, scrollbar_button_hover_color=None, frame_border_width=2, values=[], **method_command=None,**
                 image_values=[], alpha: float = 0.97, frame_corner_radius=20, double_click=False,
                 resize=True, frame_border_color=None, text_color=None, autocomplete=False, 
                 hover_color=None, bcommand=None, **button_kwargs):

# new variable
**self.method_command = method_command**

# updating command variable
self.command = None

The updated _attach_key_press() method is:

def _attach_key_press(self, k):
	self.event_generate("<<Selected>>")
	self.fade = True
	**if self.method_command:
		self.method_command(k)**
	if self.command:
		self.command(k)
	self.fade = False
	self.fade_out()
	self.withdraw()
	self.hide = True

The updated code from my inital comment would be:

from CTkScrollableDropdown import *
import customtkinter

root = customtkinter.CTk()
def hello(e):
    hellos = {"Italy": "Ciao",
              "Germany": "Hallo",
              "England": "Hello"}

    print(hellos[e])

countries = ["Italy", "Germany", "England"]

country_options = customtkinter.CTkComboBox(root)
country_options.pack()
CTkScrollableDropdown(attach=country_options, values=countries, autocomplete=True, alpha=1, **method_command=hello**)

root.mainloop()

This will now execute the command I've defined in my code and update the dropdown with the option I selected. Hopefully this helps :)

[JonnyNOS]

Thanks, this fix works, but i recommend to put **if self.method_command: self.method_command(k)** after if self.command: self.command(k) so you get the now selected value and not the value selected before that

the _attach_key_press would look like this:

    def _attach_key_press(self, k):
        self.event_generate("<<Selected>>")
        self.fade = True
        if self.command:
            self.command(k)
        **if self.method_command:
            self.method_command(k)**
        self.fade = False
        self.fade_out()
        self.withdraw()
        self.hide = True

[Akascape]

But we can also simply use the .set method:

from CTkScrollableDropdown import *
import customtkinter

root = customtkinter.CTk()
def hello(e):
    hellos = {"Italy": "Ciao",
              "Germany": "Hallo",
              "England": "Hello"}

    print(hellos[e])
    country_options.set(e)
    
countries = ["Italy", "Germany", "England"]

country_options = customtkinter.CTkComboBox(root)
country_options.pack()
CTkScrollableDropdown(attach=country_options, values=countries, autocomplete=True, alpha=1, command=hello)

root.mainloop()