mirror of
https://github.com/Textualize/textual.git
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73 lines
1.8 KiB
Python
73 lines
1.8 KiB
Python
from rich.console import RenderableType
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from rich.text import Text
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from textual.app import App, ComposeResult
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from textual.widget import Widget
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from textual.widgets import Placeholder
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placeholders_count = 12
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class VerticalContainer(Widget):
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CSS = """
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VerticalContainer {
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layout: vertical;
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overflow: hidden auto;
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background: darkblue;
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}
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VerticalContainer Placeholder {
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margin: 1 0;
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height: 5;
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border: solid lime;
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align: center top;
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}
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"""
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class Introduction(Widget):
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CSS = """
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Introduction {
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background: indigo;
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color: white;
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height: 3;
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padding: 1 0;
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}
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"""
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def render(self, styles) -> RenderableType:
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return Text(
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"Press keys 0 to 9 to scroll to the Placeholder with that ID.",
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justify="center",
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)
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class MyTestApp(App):
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def compose(self) -> ComposeResult:
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placeholders = [
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Placeholder(id=f"placeholder_{i}", name=f"Placeholder #{i}")
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for i in range(placeholders_count)
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]
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yield VerticalContainer(Introduction(), *placeholders, id="root")
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def on_mount(self):
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self.bind("q", "quit")
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self.bind("t", "tree")
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for widget_index in range(placeholders_count):
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self.bind(str(widget_index), f"scroll_to('placeholder_{widget_index}')")
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def action_tree(self):
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self.log(self.tree)
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async def action_scroll_to(self, target_placeholder_id: str):
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target_placeholder = self.query(f"#{target_placeholder_id}").first()
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target_placeholder_container = self.query("#root").first()
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target_placeholder_container.scroll_to_widget(target_placeholder, animate=True)
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app = MyTestApp()
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if __name__ == "__main__":
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app.run()
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