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58 lines
1.4 KiB
Python
58 lines
1.4 KiB
Python
from rich.segment import Segment
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from rich.style import Style
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from textual.app import App, ComposeResult
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from textual.geometry import Size
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from textual.strip import Strip
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from textual.widget import Widget
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class CheckerBoard(Widget):
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"""Render an 8x8 checkerboard."""
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COMPONENT_CLASSES = {
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"checkerboard--white-square",
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"checkerboard--black-square",
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}
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DEFAULT_CSS = """
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CheckerBoard .checkerboard--white-square {
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background: #A5BAC9;
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}
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CheckerBoard .checkerboard--black-square {
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background: #004578;
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}
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"""
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def render_line(self, y: int) -> Strip:
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"""Render a line of the widget. y is relative to the top of the widget."""
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row_index = y // 4 # four lines per row
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if row_index >= 8:
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return Strip.blank(self.size.width)
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is_odd = row_index % 2
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white = self.get_component_rich_style("checkerboard--white-square")
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black = self.get_component_rich_style("checkerboard--black-square")
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segments = [
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Segment(" " * 8, black if (column + is_odd) % 2 else white)
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for column in range(8)
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]
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strip = Strip(segments, 8 * 8)
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return strip
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class BoardApp(App):
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"""A simple app to show our widget."""
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def compose(self) -> ComposeResult:
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yield CheckerBoard()
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if __name__ == "__main__":
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app = BoardApp()
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app.run()
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