✨ Code to illustrate Textualize/textual#4073

the_welsh_problem.py

@@ -0,0 +1,80 @@
+"""Trying to recreate a rendering bug.
+
+See https://github.com/Textualize/textual/issues/4073
+"""
+
+from rich.table import Table
+from rich.console import Group
+
+from textual.app import App, ComposeResult
+from textual.containers import Vertical
+from textual.screen import ModalScreen
+from textual.widgets import OptionList
+
+NAMES = [
+    "Cardiff",
+    "Swansea",
+    "Aberdare",
+    "Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch",
+    "Mountain Ash",
+    "Hirwaun"
+]
+
+class Names(ModalScreen[None]):
+
+    CSS = """
+    Names {
+        align: center middle;
+
+        Vertical {
+            width: auto;
+            max-width: 60%;
+            height: auto;
+            max-height: 80%;
+            padding: 1 2 0 2;
+            background: $surface;
+            border: panel $primary;
+            border-title-color: $accent;
+
+            OptionList {
+                height: 1fr;
+                margin: 1 0 1 0;
+                &> .option-list--option {
+                    padding: 0 5 1 0;
+                }
+            }
+        }
+    }
+    """
+
+    def gridify(self, n: int, name: str) -> Group:
+        question = Table.grid()
+        question.add_column(width=3, justify="right")
+        question.add_column(width=1)
+        question.add_column(ratio=1)
+        question.add_row(str(n), "", f"{name} is the name of a place in Wales." )
+        answer = Table.grid()
+        answer.add_column(width=4)
+        answer.add_column(ratio=1)
+        answer.add_row("", "[red]Here is the[/] [green]second line[/]")
+        return Group(question, answer)
+
+    def compose(self) -> ComposeResult:
+        with Vertical():
+            yield OptionList(*[self.gridify(n, name) for n, name in enumerate(NAMES)])
+
+class TruncatedTextOptionApp(App[None]):
+
+    CSS = """
+    Screen#_default {
+        background: red;
+    }
+    """
+
+    def on_mount(self) -> None:
+        self.push_screen(Names())
+
+if __name__ == "__main__":
+    TruncatedTextOptionApp().run()
+
+### the_welsh_problem.py ends here