Settings dialog, per-program install defaults, Options after install; Update only when needed

Dialogs.py

@@ -6,7 +6,7 @@ from typing import Callable
 import flet as ft
 
 from Core import ChipButtonStyle, Home, Palette
-from Installer import ConfigPlan, RemovalItem, RemovalPlan, Status
+from Installer import ConfigPlan, DefaultAnswers, DefaultOptions, RemovalItem, RemovalPlan, Status
 from Manifests import Program
 
 _MaxListedItems = 12
@@ -57,8 +57,12 @@ def _Dialog(Page: ft.Page, Title: str, Body: list[ft.Control], ConfirmText: str,
 
 
 def ShowInstallDialog(Page: ft.Page, Program: Program, OnConfirm: Callable[[dict[str, bool], dict[str, str]], None]) -> None:
-    Fields = {Question.Id: ft.TextField(label=Question.Prompt, value=Question.Default) for Question in Program.Questions}
-    Boxes = {Option.Id: ft.Checkbox(label=Option.Label, value=Option.Default) for Option in Program.Options}
+    # Start from the user's defaults (Settings → this program's tab), which
+    # fall back to the manifest's.
+    Answers = DefaultAnswers(Program)
+    Ticked = DefaultOptions(Program)
+    Fields = {Question.Id: ft.TextField(label=Question.Prompt, value=Answers[Question.Id]) for Question in Program.Questions}
+    Boxes = {Option.Id: ft.Checkbox(label=Option.Label, value=Ticked[Option.Id]) for Option in Program.Options}
 
     Body: list[ft.Control] = [ft.Text(Program.Description, size=13, color=Palette.Overlay0)]
     Body += list(Fields.values())
@@ -75,6 +79,26 @@ def ShowInstallDialog(Page: ft.Page, Program: Program, OnConfirm: Callable[[dict
     ))
 
 
+def ShowOptionsDialog(Page: ft.Page, Program: Program, Current: Status, OnConfirm: Callable[[dict[str, bool]], None]) -> None:
+    """Change an installed program's options. Turning one off takes out what
+    it placed (and puts back any file it had replaced); turning one on places it."""
+    Recorded = Current.Receipt.Options if Current.Receipt else {}
+    Ticked = DefaultOptions(Program)
+    Boxes = {
+        Option.Id: ft.Checkbox(label=Option.Label, value=bool(Recorded.get(Option.Id, Ticked[Option.Id])))
+        for Option in Program.Options
+    }
+    Body: list[ft.Control] = list(Boxes.values())
+    Body.append(ft.Text(
+        "Only what these options control changes; the program stays at the version it's on.",
+        size=12, color=Palette.Overlay0,
+    ))
+    Page.show_dialog(_Dialog(
+        Page, f"{Program.Name} options", Body, "Apply",
+        lambda: OnConfirm({Id: bool(Box.value) for Id, Box in Boxes.items()}),
+    ))
+
+
 def ShowUpdateDialog(
     Page: ft.Page, Program: Program, Current: Status, NewVersion: str, NewCommit: str,
     Plans: list[ConfigPlan], OnConfirm: Callable[[], None],