Simple text editor for basic notes

trovedb/qgui/main_window.py

@@ -1,7 +1,6 @@
 from PySide6.QtCore import Qt
 from PySide6.QtGui import QAction, QKeySequence
 from PySide6.QtWidgets import (
-    QLabel,
     QMainWindow,
     QSplitter,
     QStatusBar,
@@ -13,7 +12,9 @@ from PySide6.QtWidgets import (
 from .settings import get_settings
 
 from trovedb import trove as tr
+
 from .note_browser import NoteBrowser
+from .note_tool_stack import NoteToolStack
 
 class TroveMainWindow(QMainWindow):
     def __init__(self, trove: tr.Trove):
@@ -44,15 +45,17 @@ class TroveMainWindow(QMainWindow):
         layout.setSpacing(0)
 
         # Horizontal splitter: tree | editor
-        splitter = QSplitter(Qt.Orientation.Horizontal)
+        self._splitter = QSplitter(Qt.Orientation.Horizontal)
 
         self._note_browser = NoteBrowser(trove)
-        splitter.addWidget(self._note_browser)
+        self._splitter.addWidget(self._note_browser)
 
-        self._tool = QLabel("View/Edit Tool")
-        splitter.addWidget(self._tool)
+        self._tool_stack = NoteToolStack()
+        self._splitter.addWidget(self._tool_stack)
 
-        layout.addWidget(splitter, stretch=1)
+        layout.addWidget(self._splitter, stretch=1)
+
+        self._note_browser.activeNoteChanged.connect(self._tool_stack.onNoteSelected)
 
         # ── Status bar ──
         self.setStatusBar(QStatusBar())

trovedb/qgui/note_browser.py

@@ -21,8 +21,7 @@ class NoteBrowser(QWidget):
         tree_selected(TreeNote) -- emitted when a tree note is activated
     """
 
-    note_selected = Signal(object)  # Note
-    tree_selected = Signal(object)  # TreeNote
+    activeNoteChanged = Signal(object)  # Note
 
     def __init__(self, trove: Trove, parent: Optional[QWidget] = None):
         super().__init__(parent)
@@ -38,6 +37,8 @@ class NoteBrowser(QWidget):
         layout.setContentsMargins(0, 0, 0, 0)
         layout.setSpacing(2)
 
+        self._activeNote: Optional[Note] = None
+
         self._tree = QTreeView()
         self._tree.setModel(self._model)
         self._tree.setHeaderHidden(True)
@@ -67,12 +68,7 @@ class NoteBrowser(QWidget):
 
     def _on_activated(self, index: QModelIndex) -> None:
         note = index.data(Qt.ItemDataRole.UserRole)
-        if note is None:
-            return
-        if isinstance(note, TreeNote):
-            self.tree_selected.emit(note)
-        else:
-            self.note_selected.emit(note)
+        self._handle_set_active_note(note)
 
     def _on_context_menu(self, pos) -> None:
         index = self._tree.indexAt(pos)
@@ -105,6 +101,14 @@ class NoteBrowser(QWidget):
     # Public API
     # ------------------------------------------------------------------
 
+    def _handle_set_active_note(self, note: Note | None) -> None:
+        """Called by the controller to update the active note."""
+        if not isinstance(note, Note):
+            note = None
+        if self._activeNote != note:
+            self._activeNote = note
+            self.activeNoteChanged.emit(note)
+
     def select_note(self, note: Note) -> None:
         """Programmatically select the node matching the given note object."""
         match = self._find_index(self._model.index(0, 0, QModelIndex()), note)

trovedb/qgui/note_tool_stack.py

@@ -0,0 +1,32 @@
+from typing import Generator
+
+from PySide6.QtCore import Property, Slot
+from PySide6.QtWidgets import QStackedWidget, QWidget, QLabel
+
+import trovedb.trove as tr
+
+from .tool import Tool
+from .tool_basic_editor import ToolBasicEditor
+
+
+class NoteToolStack(QStackedWidget):
+    def __init__(self, parent: QWidget | None = None):
+        super().__init__(parent)
+        self.setContentsMargins(0, 0, 0, 0)
+        self.addWidget(QLabel("No note selected"))
+
+    @Slot(object)
+    def onNoteSelected(self, note: tr.Note):
+        for tool in self._iter_tools():
+            if tool.note == note:
+                self.setCurrentWidget(tool)
+                return
+        tool = ToolBasicEditor(note)
+        self.addWidget(tool)
+        self.setCurrentWidget(tool)
+
+    def _iter_tools(self) -> Generator[Tool, None, None]:
+        for i in range(self.count()):
+            widget = self.widget(i)
+            if isinstance(widget, Tool):
+                yield widget

trovedb/qgui/tool.py

@@ -0,0 +1,14 @@
+"""Tool Base Class"""
+
+from PySide6.QtWidgets import QWidget
+
+import trovedb.trove as tr
+
+class Tool(QWidget):
+    def __init__(self, note: tr.Note, parent=None):
+        super().__init__(parent)
+        self._note = note
+
+    @property
+    def note(self) -> tr.Note:
+        return self._note

trovedb/qgui/tool_basic_editor.py

@@ -0,0 +1,28 @@
+"""Tool Supporting Basic Editor Functions"""
+from typing import cast, Protocol
+from PySide6.QtWidgets import QTextEdit, QVBoxLayout
+
+import trovedb.trove as tr
+from .tool import Tool
+
+
+class ToolBasicEditor(Tool):
+    def __init__(self, note, parent=None):
+        super().__init__(note, parent)
+
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+
+        self._text_edit = QTextEdit()
+        layout.addWidget(self._text_edit)
+        self.refresh()
+
+    def _refresh_blob(self, note: tr.Blob):
+        self._text_edit.setPlainText(note.read().decode("utf-8"))
+
+    def refresh(self):
+        if isinstance(self.note, tr.Blob):
+            self._refresh_blob(cast(tr.Blob, self.note))
+
+