CustomTkinter/customtkinter/windows/widgets/ctk_entry.py
2023-02-05 03:02:21 +01:00

385 lines
18 KiB
Python

import tkinter
from typing import Union, Tuple, Optional
from .core_rendering import CTkCanvas
from .theme import ThemeManager
from .core_rendering import DrawEngine
from .core_widget_classes import CTkBaseClass
from .font import CTkFont
from .utility import pop_from_dict_by_set, check_kwargs_empty
class CTkEntry(CTkBaseClass):
"""
Entry with rounded corners, border, textvariable support, focus and placeholder.
For detailed information check out the documentation.
"""
_minimum_x_padding = 6 # minimum padding between tkinter entry and frame border
# attributes that are passed to and managed by the tkinter entry only:
_valid_tk_entry_attributes = {"exportselection", "insertborderwidth", "insertofftime",
"insertontime", "insertwidth", "justify", "selectborderwidth",
"show", "takefocus", "validate", "validatecommand", "xscrollcommand"}
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,
text_color: Optional[Union[str, Tuple[str, str]]] = None,
placeholder_text_color: Optional[Union[str, Tuple[str, str]]] = None,
textvariable: Union[tkinter.Variable, None] = None,
placeholder_text: Union[str, None] = None,
font: Optional[Union[tuple, CTkFont]] = None,
state: str = tkinter.NORMAL,
**kwargs):
# transfer basic functionality (bg_color, size, appearance_mode, scaling) to CTkBaseClass
super().__init__(master=master, bg_color=bg_color, width=width, height=height)
# configure grid system (1x1)
self.grid_rowconfigure(0, weight=1)
self.grid_columnconfigure(0, weight=1)
# color
self._fg_color = ThemeManager.theme["CTkEntry"]["fg_color"] if fg_color is None else self._check_color_type(fg_color, transparency=True)
self._text_color = ThemeManager.theme["CTkEntry"]["text_color"] if text_color is None else self._check_color_type(text_color)
self._placeholder_text_color = ThemeManager.theme["CTkEntry"]["placeholder_text_color"] if placeholder_text_color is None else self._check_color_type(placeholder_text_color)
self._border_color = ThemeManager.theme["CTkEntry"]["border_color"] if border_color is None else self._check_color_type(border_color)
# shape
self._corner_radius = ThemeManager.theme["CTkEntry"]["corner_radius"] if corner_radius is None else corner_radius
self._border_width = ThemeManager.theme["CTkEntry"]["border_width"] if border_width is None else border_width
# text and state
self._is_focused: bool = True
self._placeholder_text = placeholder_text
self._placeholder_text_active = False
self._pre_placeholder_arguments = {} # some set arguments of the entry will be changed for placeholder and then set back
self._textvariable = textvariable
self._state = state
self._textvariable_callback_name: str = ""
# 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)
if not (self._textvariable is None or self._textvariable == ""):
self._textvariable_callback_name = self._textvariable.trace_add("write", self._textvariable_callback)
self._canvas = CTkCanvas(master=self,
highlightthickness=0,
width=self._apply_widget_scaling(self._current_width),
height=self._apply_widget_scaling(self._current_height))
self._draw_engine = DrawEngine(self._canvas)
self._entry = tkinter.Entry(master=self,
bd=0,
width=1,
highlightthickness=0,
font=self._apply_font_scaling(self._font),
state=self._state,
textvariable=self._textvariable,
**pop_from_dict_by_set(kwargs, self._valid_tk_entry_attributes))
check_kwargs_empty(kwargs, raise_error=True)
self._create_grid()
self._activate_placeholder()
self._create_bindings()
self._draw()
def _create_bindings(self, sequence: Optional[str] = None):
""" set necessary bindings for functionality of widget, will overwrite other bindings """
if sequence is None or sequence == "<FocusIn>":
self._entry.bind("<FocusIn>", self._entry_focus_in)
if sequence is None or sequence == "<FocusOut>":
self._entry.bind("<FocusOut>", self._entry_focus_out)
def _create_grid(self):
self._canvas.grid(column=0, row=0, sticky="nswe")
if self._corner_radius >= self._minimum_x_padding:
self._entry.grid(column=0, row=0, sticky="nswe",
padx=min(self._apply_widget_scaling(self._corner_radius), round(self._apply_widget_scaling(self._current_height/2))),
pady=(self._apply_widget_scaling(self._border_width), self._apply_widget_scaling(self._border_width + 1)))
else:
self._entry.grid(column=0, row=0, sticky="nswe",
padx=self._apply_widget_scaling(self._minimum_x_padding),
pady=(self._apply_widget_scaling(self._border_width), self._apply_widget_scaling(self._border_width + 1)))
def _textvariable_callback(self, var_name, index, mode):
if self._textvariable.get() == "":
self._activate_placeholder()
def _set_scaling(self, *args, **kwargs):
super()._set_scaling(*args, **kwargs)
self._entry.configure(font=self._apply_font_scaling(self._font))
self._canvas.configure(width=self._apply_widget_scaling(self._desired_width), height=self._apply_widget_scaling(self._desired_height))
self._create_grid()
self._draw(no_color_updates=True)
def _set_dimensions(self, width=None, height=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(no_color_updates=True)
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(column=0, row=0, sticky="nswe")
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)
requires_recoloring = self._draw_engine.draw_rounded_rect_with_border(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))
if requires_recoloring or no_color_updates is False:
self._canvas.configure(bg=self._apply_appearance_mode(self._bg_color))
if self._apply_appearance_mode(self._fg_color) == "transparent":
self._canvas.itemconfig("inner_parts",
fill=self._apply_appearance_mode(self._bg_color),
outline=self._apply_appearance_mode(self._bg_color))
self._entry.configure(bg=self._apply_appearance_mode(self._bg_color),
disabledbackground=self._apply_appearance_mode(self._bg_color),
readonlybackground=self._apply_appearance_mode(self._bg_color),
highlightcolor=self._apply_appearance_mode(self._bg_color))
else:
self._canvas.itemconfig("inner_parts",
fill=self._apply_appearance_mode(self._fg_color),
outline=self._apply_appearance_mode(self._fg_color))
self._entry.configure(bg=self._apply_appearance_mode(self._fg_color),
disabledbackground=self._apply_appearance_mode(self._fg_color),
readonlybackground=self._apply_appearance_mode(self._fg_color),
highlightcolor=self._apply_appearance_mode(self._fg_color))
self._canvas.itemconfig("border_parts",
fill=self._apply_appearance_mode(self._border_color),
outline=self._apply_appearance_mode(self._border_color))
if self._placeholder_text_active:
self._entry.config(fg=self._apply_appearance_mode(self._placeholder_text_color),
disabledforeground=self._apply_appearance_mode(self._placeholder_text_color),
insertbackground=self._apply_appearance_mode(self._placeholder_text_color))
else:
self._entry.config(fg=self._apply_appearance_mode(self._text_color),
disabledforeground=self._apply_appearance_mode(self._text_color),
insertbackground=self._apply_appearance_mode(self._text_color))
def configure(self, require_redraw=False, **kwargs):
if "state" in kwargs:
self._state = kwargs.pop("state")
self._entry.configure(state=self._state)
if "fg_color" in kwargs:
self._fg_color = self._check_color_type(kwargs.pop("fg_color"))
require_redraw = True
if "text_color" in kwargs:
self._text_color = self._check_color_type(kwargs.pop("text_color"))
require_redraw = True
if "placeholder_text_color" in kwargs:
self._placeholder_text_color = self._check_color_type(kwargs.pop("placeholder_text_color"))
require_redraw = True
if "border_color" in kwargs:
self._border_color = self._check_color_type(kwargs.pop("border_color"))
require_redraw = True
if "border_width" in kwargs:
self._border_width = kwargs.pop("border_width")
self._create_grid()
require_redraw = True
if "corner_radius" in kwargs:
self._corner_radius = kwargs.pop("corner_radius")
self._create_grid()
require_redraw = True
if "placeholder_text" in kwargs:
self._placeholder_text = kwargs.pop("placeholder_text")
if self._placeholder_text_active:
self._entry.delete(0, tkinter.END)
self._entry.insert(0, self._placeholder_text)
else:
self._activate_placeholder()
if "textvariable" in kwargs:
self._textvariable = kwargs.pop("textvariable")
self._entry.configure(textvariable=self._textvariable)
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 "show" in kwargs:
if self._placeholder_text_active:
self._pre_placeholder_arguments["show"] = kwargs.pop("show") # remember show argument for when placeholder gets deactivated
else:
self._entry.configure(show=kwargs.pop("show"))
self._entry.configure(**pop_from_dict_by_set(kwargs, self._valid_tk_entry_attributes)) # configure Tkinter.Entry
super().configure(require_redraw=require_redraw, **kwargs) # configure CTkBaseClass
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 == "text_color":
return self._text_color
elif attribute_name == "placeholder_text_color":
return self._placeholder_text_color
elif attribute_name == "textvariable":
return self._textvariable
elif attribute_name == "placeholder_text":
return self._placeholder_text
elif attribute_name == "font":
return self._font
elif attribute_name == "state":
return self._state
elif attribute_name in self._valid_tk_entry_attributes:
return self._entry.cget(attribute_name) # cget of tkinter.Entry
else:
return super().cget(attribute_name) # cget of CTkBaseClass
def bind(self, sequence=None, command=None, add=True):
""" called on the tkinter.Entry """
if not (add == "+" or add is True):
raise ValueError("'add' argument can only be '+' or True to preserve internal callbacks")
self._entry.bind(sequence, command, add=True)
def unbind(self, sequence=None, funcid=None):
""" called on the tkinter.Entry """
if funcid is not None:
raise ValueError("'funcid' argument can only be None, because there is a bug in" +
" tkinter and its not clear whether the internal callbacks will be unbinded or not")
self._entry.unbind(sequence, None) # unbind all callbacks for sequence
self._create_bindings(sequence=sequence) # restore internal callbacks for sequence
def _activate_placeholder(self):
if self._entry.get() == "" and self._placeholder_text is not None and (self._textvariable is None or self._textvariable == ""):
self._placeholder_text_active = True
self._pre_placeholder_arguments = {"show": self._entry.cget("show")}
self._entry.config(fg=self._apply_appearance_mode(self._placeholder_text_color),
disabledforeground=self._apply_appearance_mode(self._placeholder_text_color),
show="")
self._entry.delete(0, tkinter.END)
self._entry.insert(0, self._placeholder_text)
def _deactivate_placeholder(self):
if self._placeholder_text_active and self._entry.cget("state") != "readonly":
self._placeholder_text_active = False
self._entry.config(fg=self._apply_appearance_mode(self._text_color),
disabledforeground=self._apply_appearance_mode(self._text_color),)
self._entry.delete(0, tkinter.END)
for argument, value in self._pre_placeholder_arguments.items():
self._entry[argument] = value
def _entry_focus_out(self, event=None):
self._activate_placeholder()
self._is_focused = False
def _entry_focus_in(self, event=None):
self._deactivate_placeholder()
self._is_focused = True
def delete(self, first_index, last_index=None):
self._entry.delete(first_index, last_index)
if not self._is_focused and self._entry.get() == "":
self._activate_placeholder()
def insert(self, index, string):
self._deactivate_placeholder()
return self._entry.insert(index, string)
def get(self):
if self._placeholder_text_active:
return ""
else:
return self._entry.get()
def focus(self):
self._entry.focus()
def focus_set(self):
self._entry.focus_set()
def focus_force(self):
self._entry.focus_force()
def index(self, index):
return self._entry.index(index)
def icursor(self, index):
return self._entry.icursor(index)
def select_adjust(self, index):
return self._entry.select_adjust(index)
def select_from(self, index):
return self._entry.icursor(index)
def select_clear(self):
return self._entry.select_clear()
def select_present(self):
return self._entry.select_present()
def select_range(self, start_index, end_index):
return self._entry.select_range(start_index, end_index)
def select_to(self, index):
return self._entry.select_to(index)
def xview(self, index):
return self._entry.xview(index)
def xview_moveto(self, f):
return self._entry.xview_moveto(f)
def xview_scroll(self, number, what):
return self._entry.xview_scroll(number, what)