textual-paint/edit_colors.py

from typing import Any, Union, Optional, Callable
from textual import events
from textual.message import Message
from textual.app import ComposeResult
from textual.containers import Container
from textual.geometry import Offset
from textual.reactive import var
from textual.widget import Widget
from textual.widgets import Button, Static
from textual.containers import Container, Horizontal, Vertical
from textual.css.query import NoMatches
from localization.i18n import get as _
from windows import DialogWindow


# https://github.com/kouzhudong/win2k/blob/ce6323f76d5cd7d136b74427dad8f94ee4c389d2/trunk/private/shell/win16/comdlg/color.c#L38-L43
# These are a fallback in case colors are not received from some driver.
# const default_basic_colors = [
# 	"#8080FF", "#80FFFF", "#80FF80", "#80FF00", "#FFFF80", "#FF8000", "#C080FF", "#FF80FF",
# 	"#0000FF", "#00FFFF", "#00FF80", "#40FF00", "#FFFF00", "#C08000", "#C08080", "#FF00FF",
# 	"#404080", "#4080FF", "#00FF00", "#808000", "#804000", "#FF8080", "#400080", "#8000FF",
# 	"#000080", "#0080FF", "#008000", "#408000", "#FF0000", "#A00000", "#800080", "#FF0080",
# 	"#000040", "#004080", "#004000", "#404000", "#800000", "#400000", "#400040", "#800040",
# 	"#000000", "#008080", "#408080", "#808080", "#808040", "#C0C0C0", "#400040", "#FFFFFF",
# ];
# Grabbed with Color Cop from the screen with Windows 98 SE running in VMWare
basic_colors = [
	"#FF8080", "#FFFF80", "#80FF80", "#00FF80", "#80FFFF", "#0080FF", "#FF80C0", "#FF80FF",
	"#FF0000", "#FFFF00", "#80FF00", "#00FF40", "#00FFFF", "#0080C0", "#8080C0", "#FF00FF",
	"#804040", "#FF8040", "#00FF00", "#008080", "#004080", "#8080FF", "#800040", "#FF0080",
	"#800000", "#FF8000", "#008000", "#008040", "#0000FF", "#0000A0", "#800080", "#8000FF",
	"#400000", "#804000", "#004000", "#004040", "#000080", "#000040", "#400040", "#400080",
	"#000000", "#808000", "#808040", "#808080", "#408080", "#C0C0C0", "#400040", "#FFFFFF",
]
custom_colors = [
	"#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF",
	"#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF", "#FFFFFF",
]

class EditColorsDialogWindow(DialogWindow):
    """A dialog window that lets the user select a color."""

    def __init__(self, *children: Widget, title: str = _("Edit Colors"), selected_color: str|None, handle_selected_color: Callable[[str], None], **kwargs: Any) -> None:
        """Initialize the Edit Colors dialog."""
        super().__init__(handle_button=self.handle_button, *children, title=title, **kwargs)
        self._color_to_highlight = selected_color
        self._color_by_button: dict[Button, str] = {}
        self.handle_selected_color = handle_selected_color
    
    def handle_button(self, button: Button) -> None:
        """Called when a button is clicked or activated with the keyboard."""
        if button.has_class("cancel"):
            self.request_close()
        else:
            self.handle_selected_color(self._color_by_button[button])

    def on_mount(self) -> None:
        """Called when the window is mounted."""
        container = Container(classes="color_grid")
        for color in basic_colors:
            button = Button("", classes="color_button color_well")
            button.styles.background = color
            button.can_focus = False
            self._color_by_button[button] = color
            if color is self._color_to_highlight:
                button.focus()
            container.mount(button)
        self.content.mount(container)
        self.content.mount(Button(_("Cancel"), classes="cancel"))