mirror of
https://github.com/TomSchimansky/CustomTkinter.git
synced 2023-08-10 21:13:13 +03:00
239 lines
11 KiB
Python
239 lines
11 KiB
Python
import sys
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from .ctk_canvas import CTkCanvas
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from ..theme_manager import ThemeManager
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from ..draw_engine import DrawEngine
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from .widget_base_class import CTkBaseClass
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class CTkScrollbar(CTkBaseClass):
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def __init__(self, *args,
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bg_color=None,
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fg_color="default_theme",
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scrollbar_color="default_theme",
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scrollbar_hover_color="default_theme",
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border_spacing="default_theme",
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corner_radius="default_theme",
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width=None,
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height=None,
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minimum_pixel_length=20,
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orientation="vertical",
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command=None,
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hover=True,
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**kwargs):
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# set default dimensions according to orientation
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if width is None:
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if orientation.lower() == "vertical":
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width = 16
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else:
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width = 200
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if height is None:
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if orientation.lower() == "horizontal":
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height = 16
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else:
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height = 200
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# transfer basic functionality (bg_color, size, _appearance_mode, scaling) to CTkBaseClass
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super().__init__(*args, bg_color=bg_color, width=width, height=height, **kwargs)
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# color
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self.fg_color = ThemeManager.theme["color"]["frame_high"] if fg_color == "default_theme" else fg_color
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self.scrollbar_color = ThemeManager.theme["color"]["scrollbar_button"] if scrollbar_color == "default_theme" else scrollbar_color
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self.scrollbar_hover_color = ThemeManager.theme["color"]["scrollbar_button_hover"] if scrollbar_hover_color == "default_theme" else scrollbar_hover_color
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# shape
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self.corner_radius = ThemeManager.theme["shape"]["scrollbar_corner_radius"] if corner_radius == "default_theme" else corner_radius
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self.border_spacing = ThemeManager.theme["shape"]["scrollbar_border_spacing"] if border_spacing == "default_theme" else border_spacing
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self.hover = hover
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self.hover_state = False
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self.command = command
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self.orientation = orientation
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self.start_value: float = 0 # 0 to 1
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self.end_value: float = 1 # 0 to 1
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self.minimum_pixel_length = minimum_pixel_length
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self.canvas = CTkCanvas(master=self,
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highlightthickness=0,
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width=self.apply_widget_scaling(self._current_width),
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height=self.apply_widget_scaling(self._current_height))
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self.canvas.place(x=0, y=0, relwidth=1, relheight=1)
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self.draw_engine = DrawEngine(self.canvas)
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self.canvas.bind("<Enter>", self.on_enter)
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self.canvas.bind("<Leave>", self.on_leave)
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self.canvas.tag_bind("border_parts", "<Button-1>", self.clicked)
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self.canvas.bind("<B1-Motion>", self.clicked)
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self.canvas.bind("<MouseWheel>", self.mouse_scroll_event)
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self.bind('<Configure>', self.update_dimensions_event)
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self.draw()
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def set_scaling(self, *args, **kwargs):
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super().set_scaling(*args, **kwargs)
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self.canvas.configure(width=self.apply_widget_scaling(self._desired_width), height=self.apply_widget_scaling(self._desired_height))
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self.draw(no_color_updates=True)
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def set_dimensions(self, width=None, height=None):
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super().set_dimensions(width, height)
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self.canvas.configure(width=self.apply_widget_scaling(self._desired_width),
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height=self.apply_widget_scaling(self._desired_height))
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self.draw(no_color_updates=True)
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def get_scrollbar_values_for_minimum_pixel_size(self):
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# correct scrollbar float values if scrollbar is too small
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if self.orientation == "vertical":
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scrollbar_pixel_length = (self.end_value - self.start_value) * self._current_height
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if scrollbar_pixel_length < self.minimum_pixel_length and -scrollbar_pixel_length + self._current_height != 0:
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# calculate how much to increase the float interval values so that the scrollbar width is self.minimum_pixel_length
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interval_extend_factor = (-scrollbar_pixel_length + self.minimum_pixel_length) / (-scrollbar_pixel_length + self._current_height)
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corrected_end_value = self.end_value + (1 - self.end_value) * interval_extend_factor
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corrected_start_value = self.start_value - self.start_value * interval_extend_factor
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return corrected_start_value, corrected_end_value
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else:
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return self.start_value, self.end_value
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else:
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scrollbar_pixel_length = (self.end_value - self.start_value) * self._current_width
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if scrollbar_pixel_length < self.minimum_pixel_length and -scrollbar_pixel_length + self._current_width != 0:
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# calculate how much to increase the float interval values so that the scrollbar width is self.minimum_pixel_length
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interval_extend_factor = (-scrollbar_pixel_length + self.minimum_pixel_length) / (-scrollbar_pixel_length + self._current_width)
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corrected_end_value = self.end_value + (1 - self.end_value) * interval_extend_factor
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corrected_start_value = self.start_value - self.start_value * interval_extend_factor
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return corrected_start_value, corrected_end_value
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else:
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return self.start_value, self.end_value
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def draw(self, no_color_updates=False):
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corrected_start_value, corrected_end_value = self.get_scrollbar_values_for_minimum_pixel_size()
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requires_recoloring = self.draw_engine.draw_rounded_scrollbar(self.apply_widget_scaling(self._current_width),
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self.apply_widget_scaling(self._current_height),
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self.apply_widget_scaling(self.corner_radius),
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self.apply_widget_scaling(self.border_spacing),
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corrected_start_value,
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corrected_end_value,
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self.orientation)
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if no_color_updates is False or requires_recoloring:
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if self.hover_state is True:
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self.canvas.itemconfig("scrollbar_parts",
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fill=ThemeManager.single_color(self.scrollbar_hover_color, self._appearance_mode),
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outline=ThemeManager.single_color(self.scrollbar_hover_color, self._appearance_mode))
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else:
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self.canvas.itemconfig("scrollbar_parts",
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fill=ThemeManager.single_color(self.scrollbar_color, self._appearance_mode),
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outline=ThemeManager.single_color(self.scrollbar_color, self._appearance_mode))
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if self.fg_color is None:
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self.canvas.configure(bg=ThemeManager.single_color(self.bg_color, self._appearance_mode))
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self.canvas.itemconfig("border_parts",
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fill=ThemeManager.single_color(self.bg_color, self._appearance_mode),
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outline=ThemeManager.single_color(self.bg_color, self._appearance_mode))
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else:
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self.canvas.configure(bg=ThemeManager.single_color(self.fg_color, self._appearance_mode))
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self.canvas.itemconfig("border_parts",
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fill=ThemeManager.single_color(self.fg_color, self._appearance_mode),
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outline=ThemeManager.single_color(self.fg_color, self._appearance_mode))
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self.canvas.update_idletasks()
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def set(self, start_value: float, end_value: float):
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self.start_value = float(start_value)
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self.end_value = float(end_value)
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self.draw()
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def get(self):
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return self.start_value, self.end_value
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def configure(self, *args, **kwargs):
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require_redraw = False # some attribute changes require a call of self.draw() at the end
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if "bg_color" in kwargs:
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if kwargs["bg_color"] is None:
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self.bg_color = self.detect_color_of_master()
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else:
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self.bg_color = kwargs["bg_color"]
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require_redraw = True
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del kwargs["bg_color"]
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if "fg_color" in kwargs:
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self.fg_color = kwargs["fg_color"]
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require_redraw = True
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del kwargs["fg_color"]
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if "scrollbar_color" in kwargs:
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self.scrollbar_color = kwargs["scrollbar_color"]
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require_redraw = True
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del kwargs["scrollbar_color"]
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if "scrollbar_hover_color" in kwargs:
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self.scrollbar_hover_color = kwargs["scrollbar_hover_color"]
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require_redraw = True
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del kwargs["scrollbar_hover_color"]
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if "command" in kwargs:
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self.command = kwargs["command"]
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del kwargs["command"]
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if "corner_radius" in kwargs:
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self.corner_radius = kwargs["corner_radius"]
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require_redraw = True
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del kwargs["corner_radius"]
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if "border_spacing" in kwargs:
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self.border_spacing = kwargs["border_spacing"]
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require_redraw = True
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del kwargs["border_spacing"]
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if "width" in kwargs:
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self.set_dimensions(width=kwargs["width"])
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del kwargs["width"]
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if "height" in kwargs:
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self.set_dimensions(height=kwargs["height"])
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del kwargs["height"]
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super().configure(*args, **kwargs)
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if require_redraw:
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self.draw()
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def on_enter(self, event=0):
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if self.hover is True:
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self.hover_state = True
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self.canvas.itemconfig("scrollbar_parts",
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outline=ThemeManager.single_color(self.scrollbar_hover_color, self._appearance_mode),
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fill=ThemeManager.single_color(self.scrollbar_hover_color, self._appearance_mode))
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def on_leave(self, event=0):
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self.hover_state = False
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self.canvas.itemconfig("scrollbar_parts",
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outline=ThemeManager.single_color(self.scrollbar_color, self._appearance_mode),
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fill=ThemeManager.single_color(self.scrollbar_color, self._appearance_mode))
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def clicked(self, event):
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if self.orientation == "vertical":
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value = ((event.y - self.border_spacing) / (self._current_height - 2 * self.border_spacing)) / self._widget_scaling
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else:
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value = ((event.x - self.border_spacing) / (self._current_width - 2 * self.border_spacing)) / self._widget_scaling
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current_scrollbar_length = self.end_value - self.start_value
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value = max(current_scrollbar_length / 2, min(value, 1 - (current_scrollbar_length / 2)))
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self.start_value = value - (current_scrollbar_length / 2)
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self.end_value = value + (current_scrollbar_length / 2)
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self.draw()
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if self.command is not None:
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self.command('moveto', self.start_value)
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def mouse_scroll_event(self, event=None):
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if self.command is not None:
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if sys.platform.startswith("win"):
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self.command('scroll', -int(event.delta/40), 'units')
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else:
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self.command('scroll', -event.delta, 'units')
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