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import tkinter
import math
from typing import Union, Tuple, Optional, Callable
try:
from typing import Literal
except ImportError:
from typing_extensions import Literal
from .core_rendering import CTkCanvas
from .theme import ThemeManager
from .core_rendering import DrawEngine
from .core_widget_classes import CTkBaseClass
class CTkProgressBar(CTkBaseClass):
"""
Progressbar with rounded corners, border, variable support,
indeterminate mode, vertical orientation.
For detailed information check out the documentation.
"""
def __init__(self,
master: any,
width: Optional[int] = None,
height: Optional[int] = None,
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,
progress_color: Optional[Union[str, Tuple[str, str]]] = None,
variable: Union[tkinter.Variable, None] = None,
orientation: str = "horizontal",
mode: Literal["determinate", "indeterminate"] = "determinate",
determinate_speed: float = 1,
indeterminate_speed: float = 1,
**kwargs):
# set default dimensions according to orientation
if width is None:
if orientation.lower() == "vertical":
width = 8
else:
width = 200
if height is None:
if orientation.lower() == "vertical":
height = 200
else:
height = 8
# transfer basic functionality (_bg_color, size, __appearance_mode, scaling) to CTkBaseClass
super().__init__(master=master, bg_color=bg_color, width=width, height=height, **kwargs)
# color
self._border_color = ThemeManager.theme["CTkProgressBar"]["border_color"] if border_color is None else self._check_color_type(border_color)
self._fg_color = ThemeManager.theme["CTkProgressBar"]["fg_color"] if fg_color is None else self._check_color_type(fg_color)
self._progress_color = ThemeManager.theme["CTkProgressBar"]["progress_color"] if progress_color is None else self._check_color_type(progress_color)
# control variable
self._variable = variable
self._variable_callback_blocked = False
self._variable_callback_name = None
self._loop_after_id = None
# shape
self._corner_radius = ThemeManager.theme["CTkProgressBar"]["corner_radius"] if corner_radius is None else corner_radius
self._border_width = ThemeManager.theme["CTkProgressBar"]["border_width"] if border_width is None else border_width
self._determinate_value: float = 0.5 # range 0-1
self._determinate_speed = determinate_speed # range 0-1
self._indeterminate_value: float = 0 # range 0-inf
self._indeterminate_width: float = 0.4 # range 0-1
self._indeterminate_speed = indeterminate_speed # range 0-1 to travel in 50ms
self._loop_running: bool = False
self._orientation = orientation
self._mode = mode # "determinate" or "indeterminate"
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._canvas.grid(row=0, column=0, rowspan=1, columnspan=1, sticky="nswe")
self._draw_engine = DrawEngine(self._canvas)
self._draw() # initial draw
if self._variable is not None:
self._variable_callback_name = self._variable.trace_add("write", self._variable_callback)
self._variable_callback_blocked = True
self.set(self._variable.get(), from_variable_callback=True)
self._variable_callback_blocked = False
def _set_scaling(self, *args, **kwargs):
super()._set_scaling(*args, **kwargs)
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=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()
def destroy(self):
if self._variable is not None:
self._variable.trace_remove("write", self._variable_callback_name)
super().destroy()
def _draw(self, no_color_updates=False):
super()._draw(no_color_updates)
if self._orientation.lower() == "horizontal":
orientation = "w"
elif self._orientation.lower() == "vertical":
orientation = "s"
else:
orientation = "w"
if self._mode == "determinate":
requires_recoloring = self._draw_engine.draw_rounded_progress_bar_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),
0,
self._determinate_value,
orientation)
else: # indeterminate mode
progress_value = (math.sin(self._indeterminate_value * math.pi / 40) + 1) / 2
progress_value_1 = min(1.0, progress_value + (self._indeterminate_width / 2))
progress_value_2 = max(0.0, progress_value - (self._indeterminate_width / 2))
requires_recoloring = self._draw_engine.draw_rounded_progress_bar_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),
progress_value_1,
progress_value_2,
orientation)
if no_color_updates is False or requires_recoloring:
self._canvas.configure(bg=self._apply_appearance_mode(self._bg_color))
self._canvas.itemconfig("border_parts",
fill=self._apply_appearance_mode(self._border_color),
outline=self._apply_appearance_mode(self._border_color))
self._canvas.itemconfig("inner_parts",
fill=self._apply_appearance_mode(self._fg_color),
outline=self._apply_appearance_mode(self._fg_color))
self._canvas.itemconfig("progress_parts",
fill=self._apply_appearance_mode(self._progress_color),
outline=self._apply_appearance_mode(self._progress_color))
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")
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 "progress_color" in kwargs:
self._progress_color = self._check_color_type(kwargs.pop("progress_color"))
require_redraw = True
if "variable" in kwargs:
if self._variable is not None:
self._variable.trace_remove("write", self._variable_callback_name)
self._variable = kwargs.pop("variable")
if self._variable is not None and self._variable != "":
self._variable_callback_name = self._variable.trace_add("write", self._variable_callback)
self.set(self._variable.get(), from_variable_callback=True)
else:
self._variable = None
if "mode" in kwargs:
self._mode = kwargs.pop("mode")
require_redraw = True
if "determinate_speed" in kwargs:
self._determinate_speed = kwargs.pop("determinate_speed")
if "indeterminate_speed" in kwargs:
self._indeterminate_speed = kwargs.pop("indeterminate_speed")
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 == "progress_color":
return self._progress_color
elif attribute_name == "variable":
return self._variable
elif attribute_name == "orientation":
return self._orientation
elif attribute_name == "mode":
return self._mode
elif attribute_name == "determinate_speed":
return self._determinate_speed
elif attribute_name == "indeterminate_speed":
return self._indeterminate_speed
else:
return super().cget(attribute_name)
def _variable_callback(self, var_name, index, mode):
if not self._variable_callback_blocked:
self.set(self._variable.get(), from_variable_callback=True)
def set(self, value, from_variable_callback=False):
""" set determinate value """
self._determinate_value = value
if self._determinate_value > 1:
self._determinate_value = 1
elif self._determinate_value < 0:
self._determinate_value = 0
self._draw(no_color_updates=True)
if self._variable is not None and not from_variable_callback:
self._variable_callback_blocked = True
self._variable.set(round(self._determinate_value) if isinstance(self._variable, tkinter.IntVar) else self._determinate_value)
self._variable_callback_blocked = False
def get(self) -> float:
""" get determinate value """
return self._determinate_value
def start(self):
""" start automatic mode """
if not self._loop_running:
self._loop_running = True
self._internal_loop()
def stop(self):
""" stop automatic mode """
if self._loop_after_id is not None:
self.after_cancel(self._loop_after_id)
self._loop_running = False
def _internal_loop(self):
if self._loop_running:
if self._mode == "determinate":
self._determinate_value += self._determinate_speed / 50
if self._determinate_value > 1:
self._determinate_value -= 1
self._draw()
self._loop_after_id = self.after(20, self._internal_loop)
else:
self._indeterminate_value += self._indeterminate_speed
self._draw()
self._loop_after_id = self.after(20, self._internal_loop)
def step(self):
""" increase progress """
if self._mode == "determinate":
self._determinate_value += self._determinate_speed / 50
if self._determinate_value > 1:
self._determinate_value -= 1
self._draw()
else:
self._indeterminate_value += self._indeterminate_speed
self._draw()
def bind(self, sequence: str = None, command: Callable = None, add: Union[str, bool] = True):
""" called on the tkinter.Canvas """
if not (add == "+" or add is True):
raise ValueError("'add' argument can only be '+' or True to preserve internal callbacks")
self._canvas.bind(sequence, command, add=True)
def unbind(self, sequence: str = None, funcid: str = None):
""" called on the tkinter.Label and tkinter.Canvas """
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._canvas.unbind(sequence, None)
def focus(self):
return self._canvas.focus()
def focus_set(self):
return self._canvas.focus_set()
def focus_force(self):
return self._canvas.focus_force()