Indent tabs by 4 spaces in code block editor dialog

CHANGELOG.md

@@ -4,6 +4,7 @@
  * Add 'Created at' to time log table.
  * Show total hours for the day in the time log table (not just in the widget in sidebar)
  * Pomodoro timer is now in the sidebar when toggled on, rather than as a separate dialog, so it stays out of the way
+ * Indent tabs by 4 spaces in code block editor dialog
 
 # 0.6.1
 

bouquin/code_block_editor_dialog.py

@@ -40,9 +40,21 @@ class CodeEditorWithLineNumbers(QPlainTextEdit):
         self.cursorPositionChanged.connect(self._line_number_area.update)
 
         self._update_line_number_area_width()
+        self._update_tab_stop_width()
 
     # ---- layout / sizing -------------------------------------------------
 
+    def setFont(self, font: QFont) -> None:  # type: ignore[override]
+        """Ensure tab width stays at 4 spaces when the font changes."""
+        super().setFont(font)
+        self._update_tab_stop_width()
+
+    def _update_tab_stop_width(self) -> None:
+        """Set tab width to 4 spaces."""
+        metrics = QFontMetrics(self.font())
+        # Tab width = width of 4 space characters
+        self.setTabStopDistance(metrics.horizontalAdvance(" ") * 4)
+
     def line_number_area_width(self) -> int:
         # Enough digits for large-ish code blocks.
         digits = max(2, len(str(max(1, self.blockCount()))))