import tkinter
import sys
from typing import Union, Tuple, Callable, List, Optional
from .core_widget_classes.dropdown_menu import DropdownMenu
from .core_rendering.ctk_canvas import CTkCanvas
from .theme.theme_manager import ThemeManager
from .core_rendering.draw_engine import DrawEngine
from .core_widget_classes.widget_base_class import CTkBaseClass
from .font.ctk_font import CTkFont
class CTkComboBox(CTkBaseClass):
"""
Combobox with dropdown menu, rounded corners, border, variable support.
For detailed information check out the documentation.
"""
def __init__(self,
master: any,
width: int = 140,
height: int = 28,
corner_radius: Optional[int] = None,
border_width: Optional[int] = None,
bg_color: Union[str, Tuple[str, str]] = "transparent",
fg_color: Optional[Union[str, Tuple[str, str]]] = None,
border_color: Optional[Union[str, Tuple[str, str]]] = None,
button_color: Optional[Union[str, Tuple[str, str]]] = None,
button_hover_color: Optional[Union[str, Tuple[str, str]]] = None,
dropdown_fg_color: Optional[Union[str, Tuple[str, str]]] = None,
dropdown_hover_color: Optional[Union[str, Tuple[str, str]]] = None,
dropdown_text_color: Optional[Union[str, Tuple[str, str]]] = None,
text_color: Optional[Union[str, Tuple[str, str]]] = None,
text_color_disabled: Optional[Union[str, Tuple[str, str]]] = None,
font: Optional[Union[tuple, CTkFont]] = None,
dropdown_font: Optional[Union[tuple, CTkFont]] = None,
values: Optional[List[str]] = None,
state: str = tkinter.NORMAL,
hover: bool = True,
variable: Union[tkinter.Variable, None] = None,
command: Union[Callable[[str], None], None] = None,
justify: str = "left",
**kwargs):
# transfer basic functionality (_bg_color, size, __appearance_mode, scaling) to CTkBaseClass
super().__init__(master=master, bg_color=bg_color, width=width, height=height, **kwargs)
# shape
self._corner_radius = ThemeManager.theme["CTkComboBox"]["corner_radius"] if corner_radius is None else corner_radius
self._border_width = ThemeManager.theme["CTkComboBox"]["border_width"] if border_width is None else border_width
# color
self._fg_color = ThemeManager.theme["CTkComboBox"]["fg_color"] if fg_color is None else self._check_color_type(fg_color)
self._border_color = ThemeManager.theme["CTkComboBox"]["border_color"] if border_color is None else self._check_color_type(border_color)
self._button_color = ThemeManager.theme["CTkComboBox"]["button_color"] if button_color is None else self._check_color_type(button_color)
self._button_hover_color = ThemeManager.theme["CTkComboBox"]["button_hover_color"] if button_hover_color is None else self._check_color_type(button_hover_color)
self._text_color = ThemeManager.theme["CTkComboBox"]["text_color"] if text_color is None else self._check_color_type(text_color)
self._text_color_disabled = ThemeManager.theme["CTkComboBox"]["text_color_disabled"] if text_color_disabled is None else self._check_color_type(text_color_disabled)
# font
self._font = CTkFont() if font is None else self._check_font_type(font)
if isinstance(self._font, CTkFont):
self._font.add_size_configure_callback(self._update_font)
# callback and hover functionality
self._command = command
self._variable = variable
self._state = state
self._hover = hover
if values is None:
self._values = ["CTkComboBox"]
else:
self._values = values
self._dropdown_menu = DropdownMenu(master=self,
values=self._values,
command=self._dropdown_callback,
fg_color=dropdown_fg_color,
hover_color=dropdown_hover_color,
text_color=dropdown_text_color,
font=dropdown_font)
# configure grid system (1x1)
self.grid_rowconfigure(0, weight=1)
self.grid_columnconfigure(0, weight=1)
self._canvas = CTkCanvas(master=self,
highlightthickness=0,
width=self._apply_widget_scaling(self._desired_width),
height=self._apply_widget_scaling(self._desired_height))
self.draw_engine = DrawEngine(self._canvas)
self._entry = tkinter.Entry(master=self,
state=self._state,
width=1,
bd=0,
justify=justify,
highlightthickness=0,
font=self._apply_font_scaling(self._font))
self._create_grid()
# insert default value
if len(self._values) > 0:
self._entry.insert(0, self._values[0])
else:
self._entry.insert(0, "CTkComboBox")
self._draw() # initial draw
# event bindings
self._canvas.tag_bind("right_parts", "<Enter>", self._on_enter)
self._canvas.tag_bind("dropdown_arrow", "<Enter>", self._on_enter)
self._canvas.tag_bind("right_parts", "<Leave>", self._on_leave)
self._canvas.tag_bind("dropdown_arrow", "<Leave>", self._on_leave)
self._canvas.tag_bind("right_parts", "<Button-1>", self._clicked)
self._canvas.tag_bind("dropdown_arrow", "<Button-1>", self._clicked)
if self._variable is not None:
self._entry.configure(textvariable=self._variable)
def _create_grid(self):
self._canvas.grid(row=0, column=0, rowspan=1, columnspan=1, sticky="nsew")
left_section_width = self._current_width - self._current_height
self._entry.grid(row=0, column=0, rowspan=1, columnspan=1, sticky="ew",
padx=(max(self._apply_widget_scaling(self._corner_radius), self._apply_widget_scaling(3)),
max(self._apply_widget_scaling(self._current_width - left_section_width + 3), self._apply_widget_scaling(3))),
pady=self._apply_widget_scaling(self._border_width))
def _set_scaling(self, *args, **kwargs):
super()._set_scaling(*args, **kwargs)
# change entry font size and grid padding
self._entry.configure(font=self._apply_font_scaling(self._font))
self._create_grid()
self._canvas.configure(width=self._apply_widget_scaling(self._desired_width),
height=self._apply_widget_scaling(self._desired_height))
self._draw(no_color_updates=True)
def _set_dimensions(self, width: int = None, height: int = None):
super()._set_dimensions(width, height)
self._canvas.configure(width=self._apply_widget_scaling(self._desired_width),
height=self._apply_widget_scaling(self._desired_height))
self._draw()
def _update_font(self):
""" pass font to tkinter widgets with applied font scaling and update grid with workaround """
self._entry.configure(font=self._apply_font_scaling(self._font))
# Workaround to force grid to be resized when text changes size.
# Otherwise grid will lag and only resizes if other mouse action occurs.
self._canvas.grid_forget()
self._canvas.grid(row=0, column=0, rowspan=1, columnspan=1, sticky="nsew")
def destroy(self):
if isinstance(self._font, CTkFont):
self._font.remove_size_configure_callback(self._update_font)
super().destroy()
def _draw(self, no_color_updates=False):
super()._draw(no_color_updates)
left_section_width = self._current_width - self._current_height
requires_recoloring = self.draw_engine.draw_rounded_rect_with_border_vertical_split(self._apply_widget_scaling(self._current_width),
self._apply_widget_scaling(self._current_height),
self._apply_widget_scaling(self._corner_radius),
self._apply_widget_scaling(self._border_width),
self._apply_widget_scaling(left_section_width))
requires_recoloring_2 = self.draw_engine.draw_dropdown_arrow(self._apply_widget_scaling(self._current_width - (self._current_height / 2)),
self._apply_widget_scaling(self._current_height / 2),
self._apply_widget_scaling(self._current_height / 3))
if no_color_updates is False or requires_recoloring or requires_recoloring_2:
self._canvas.configure(bg=self._apply_appearance_mode(self._bg_color))
self._canvas.itemconfig("inner_parts_left",
outline=self._apply_appearance_mode(self._fg_color),
fill=self._apply_appearance_mode(self._fg_color))
self._canvas.itemconfig("border_parts_left",
outline=self._apply_appearance_mode(self._border_color),
fill=self._apply_appearance_mode(self._border_color))
self._canvas.itemconfig("inner_parts_right",
outline=self._apply_appearance_mode(self._button_color),
fill=self._apply_appearance_mode(self._button_color))
self._canvas.itemconfig("border_parts_right",
outline=self._apply_appearance_mode(self._button_color),
fill=self._apply_appearance_mode(self._button_color))
self._entry.configure(bg=self._apply_appearance_mode(self._fg_color),
fg=self._apply_appearance_mode(self._text_color),
disabledbackground=self._apply_appearance_mode(self._fg_color),
disabledforeground=self._apply_appearance_mode(self._text_color_disabled),
highlightcolor=self._apply_appearance_mode(self._fg_color),
insertbackground=self._apply_appearance_mode(self._text_color))
if self._state == tkinter.DISABLED:
self._canvas.itemconfig("dropdown_arrow",
fill=self._apply_appearance_mode(self._text_color_disabled))
else:
self._canvas.itemconfig("dropdown_arrow",
fill=self._apply_appearance_mode(self._text_color))
def _open_dropdown_menu(self):
self._dropdown_menu.open(self.winfo_rootx(),
self.winfo_rooty() + self._apply_widget_scaling(self._current_height + 0))
def configure(self, require_redraw=False, **kwargs):
if "corner_radius" in kwargs:
self._corner_radius = kwargs.pop("corner_radius")
require_redraw = True
if "border_width" in kwargs:
self._border_width = kwargs.pop("border_width")
self._create_grid()
require_redraw = True
if "fg_color" in kwargs:
self._fg_color = self._check_color_type(kwargs.pop("fg_color"))
require_redraw = True
if "border_color" in kwargs:
self._border_color = self._check_color_type(kwargs.pop("border_color"))
require_redraw = True
if "button_color" in kwargs:
self._button_color = self._check_color_type(kwargs.pop("button_color"))
require_redraw = True
if "button_hover_color" in kwargs:
self._button_hover_color = self._check_color_type(kwargs.pop("button_hover_color"))
require_redraw = True
if "dropdown_fg_color" in kwargs:
self._dropdown_menu.configure(fg_color=kwargs.pop("dropdown_fg_color"))
if "dropdown_hover_color" in kwargs:
self._dropdown_menu.configure(hover_color=kwargs.pop("dropdown_hover_color"))
if "dropdown_text_color" in kwargs:
self._dropdown_menu.configure(text_color=kwargs.pop("dropdown_text_color"))
if "text_color" in kwargs:
self._text_color = self._check_color_type(kwargs.pop("text_color"))
require_redraw = True
if "text_color_disabled" in kwargs:
self._text_color_disabled = self._check_color_type(kwargs.pop("text_color_disabled"))
require_redraw = True
if "font" in kwargs:
if isinstance(self._font, CTkFont):
self._font.remove_size_configure_callback(self._update_font)
self._font = self._check_font_type(kwargs.pop("font"))
if isinstance(self._font, CTkFont):
self._font.add_size_configure_callback(self._update_font)
self._update_font()
if "dropdown_font" in kwargs:
self._dropdown_menu.configure(font=kwargs.pop("dropdown_font"))
if "values" in kwargs:
self._values = kwargs.pop("values")
self._dropdown_menu.configure(values=self._values)
if "state" in kwargs:
self._state = kwargs.pop("state")
self._entry.configure(state=self._state)
require_redraw = True
if "hover" in kwargs:
self._hover = kwargs.pop("hover")
if "variable" in kwargs:
self._variable = kwargs.pop("variable")
self._entry.configure(textvariable=self._variable)
if "command" in kwargs:
self._command = kwargs.pop("command")
if "justify" in kwargs:
self._entry.configure(justify=kwargs.pop("justify"))
super().configure(require_redraw=require_redraw, **kwargs)
def cget(self, attribute_name: str) -> any:
if attribute_name == "corner_radius":
return self._corner_radius
elif attribute_name == "border_width":
return self._border_width
elif attribute_name == "fg_color":
return self._fg_color
elif attribute_name == "border_color":
return self._border_color
elif attribute_name == "button_color":
return self._button_color
elif attribute_name == "button_hover_color":
return self._button_hover_color
elif attribute_name == "dropdown_fg_color":
return self._dropdown_menu.cget("fg_color")
elif attribute_name == "dropdown_hover_color":
return self._dropdown_menu.cget("hover_color")
elif attribute_name == "dropdown_text_color":
return self._dropdown_menu.cget("text_color")
elif attribute_name == "text_color":
return self._text_color
elif attribute_name == "text_color_disabled":
return self._text_color_disabled
elif attribute_name == "font":
return self._font
elif attribute_name == "dropdown_font":
return self._dropdown_menu.cget("font")
elif attribute_name == "values":
return self._values
elif attribute_name == "state":
return self._state
elif attribute_name == "hover":
return self._hover
elif attribute_name == "variable":
return self._variable
elif attribute_name == "command":
return self._command
elif attribute_name == "justify":
return self._entry.cget("justify")
else:
return super().cget(attribute_name)
def _on_enter(self, event=0):
if self._hover is True and self._state == tkinter.NORMAL and len(self._values) > 0:
if sys.platform == "darwin" and len(self._values) > 0 and self._cursor_manipulation_enabled:
self._canvas.configure(cursor="pointinghand")
elif sys.platform.startswith("win") and len(self._values) > 0 and self._cursor_manipulation_enabled:
self._canvas.configure(cursor="hand2")
# set color of inner button parts to hover color
self._canvas.itemconfig("inner_parts_right",
outline=self._apply_appearance_mode(self._button_hover_color),
fill=self._apply_appearance_mode(self._button_hover_color))
self._canvas.itemconfig("border_parts_right",
outline=self._apply_appearance_mode(self._button_hover_color),
fill=self._apply_appearance_mode(self._button_hover_color))
def _on_leave(self, event=0):
if sys.platform == "darwin" and len(self._values) > 0 and self._cursor_manipulation_enabled:
self._canvas.configure(cursor="arrow")
elif sys.platform.startswith("win") and len(self._values) > 0 and self._cursor_manipulation_enabled:
self._canvas.configure(cursor="arrow")
# set color of inner button parts
self._canvas.itemconfig("inner_parts_right",
outline=self._apply_appearance_mode(self._button_color),
fill=self._apply_appearance_mode(self._button_color))
self._canvas.itemconfig("border_parts_right",
outline=self._apply_appearance_mode(self._button_color),
fill=self._apply_appearance_mode(self._button_color))
def _dropdown_callback(self, value: str):
if self._state == "readonly":
self._entry.configure(state="normal")
self._entry.delete(0, tkinter.END)
self._entry.insert(0, value)
self._entry.configure(state="readonly")
else:
self._entry.delete(0, tkinter.END)
self._entry.insert(0, value)
if self._command is not None:
self._command(value)
def set(self, value: str):
if self._state == "readonly":
self._entry.configure(state="normal")
self._entry.delete(0, tkinter.END)
self._entry.insert(0, value)
self._entry.configure(state="readonly")
else:
self._entry.delete(0, tkinter.END)
self._entry.insert(0, value)
def get(self) -> str:
return self._entry.get()
def _clicked(self, event=0):
if self._state is not tkinter.DISABLED and len(self._values) > 0:
self._open_dropdown_menu()
def bind(self, sequence=None, command=None, add=None):
""" called on the tkinter.Entry """
return self._entry.bind(sequence, command, add)
def unbind(self, sequence, funcid=None):
""" called on the tkinter.Entry """
return self._entry.unbind(sequence, funcid)
def focus(self):
return self._entry.focus()
def focus_set(self):
return self._entry.focus_set()
def focus_force(self):
return self._entry.focus_force()