Refine member and asset detail layouts

src/ccma/ui/messages.py

@@ -0,0 +1,80 @@
+from __future__ import annotations
+
+import tkinter as tk
+from collections.abc import Callable, Iterable
+from dataclasses import dataclass
+from tkinter import ttk
+
+
+MessageType = str
+
+
+@dataclass(frozen=True)
+class MessageAction:
+    label: str
+    callback: Callable[[], None]
+
+
+@dataclass(frozen=True)
+class TabMessage:
+    message_type: MessageType
+    text: str
+    action: MessageAction | None = None
+
+
+_TYPE_STYLES = {
+    "error": "Error",
+    "notification": "Notification",
+    "warning": "Warning",
+    "info": "Info",
+}
+
+
+class MessageBannerList(ttk.Frame):
+    def __init__(self, master: tk.Misc):
+        super().__init__(master)
+        self.columnconfigure(0, weight=1)
+        self._messages: list[TabMessage] = []
+
+    def set_messages(self, messages: Iterable[TabMessage]) -> None:
+        self._messages = [message for message in messages if message.text.strip()]
+        self._render()
+        if self._messages:
+            self.grid()
+        else:
+            self.grid_remove()
+
+    def _render(self) -> None:
+        for child in self.winfo_children():
+            child.destroy()
+        for row_index, message in enumerate(self._messages):
+            style_name = _message_style_name(message.message_type)
+            banner = ttk.Frame(self, style=f"Message{style_name}Border.TFrame", padding=1)
+            banner.grid(row=row_index, column=0, sticky="ew", pady=(0, 6))
+            banner.columnconfigure(0, weight=1)
+            body = ttk.Frame(banner, style=f"Message{style_name}.TFrame", padding=(10, 8))
+            body.grid(row=0, column=0, sticky="ew")
+            body.columnconfigure(0, weight=1)
+            label = ttk.Label(
+                body,
+                text=message.text,
+                style=f"Message{style_name}.TLabel",
+                wraplength=900,
+                justify="left",
+            )
+            label.grid(row=0, column=0, sticky="ew")
+            body.bind(
+                "<Configure>",
+                lambda event, target=label: target.configure(wraplength=max(240, event.width - 180)),
+                add="+",
+            )
+            if message.action is not None:
+                ttk.Button(
+                    body,
+                    text=message.action.label,
+                    command=message.action.callback,
+                ).grid(row=0, column=1, sticky="e", padx=(12, 0))
+
+
+def _message_style_name(message_type: MessageType) -> str:
+    return _TYPE_STYLES.get(message_type.casefold(), "Info")