1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
from rich.segment import Segment
from textual.app import App, ComposeResult
from textual.strip import Strip
from textual.widget import Widget
class CheckerBoard(Widget):
"""Render an 8x8 checkerboard."""
COMPONENT_CLASSES = {
"checkerboard--white-square",
"checkerboard--black-square",
}
DEFAULT_CSS = """
CheckerBoard .checkerboard--white-square {
background: #A5BAC9;
}
CheckerBoard .checkerboard--black-square {
background: #004578;
}
"""
def render_line(self, y: int) -> Strip:
"""Render a line of the widget. y is relative to the top of the widget."""
row_index = y // 4 # four lines per row
if row_index >= 8:
return Strip.blank(self.size.width)
is_odd = row_index % 2
white = self.get_component_rich_style("checkerboard--white-square")
black = self.get_component_rich_style("checkerboard--black-square")
segments = [
Segment(" " * 8, black if (column + is_odd) % 2 else white)
for column in range(8)
]
strip = Strip(segments, 8 * 8)
return strip
class BoardApp(App):
"""A simple app to show our widget."""
def compose(self) -> ComposeResult:
yield CheckerBoard()
if __name__ == "__main__":
app = BoardApp()
app.run()
|
