Put cursor at click position on edit

Fixes #150

app/playlists.py

@@ -1,9 +1,9 @@
 # Standard library imports
 from typing import Callable, cast, List, Optional, TYPE_CHECKING
-import time
 
 # PyQt imports
 from PyQt6.QtCore import (
+    QAbstractItemModel,
     QEvent,
     QModelIndex,
     QObject,
@@ -57,40 +57,46 @@ class EscapeDelegate(QStyledItemDelegate):
     - increases the height of a row when editing to make editing easier
     - closes the edit on control-return
     - checks with user before abandoning edit on Escape
+    - positions cursor where double-click occurs
     """
 
     def __init__(self, parent: QWidget, source_model: PlaylistModel) -> None:
         super().__init__(parent)
         self.source_model = source_model
         self.signals = MusicMusterSignals()
+        self.click_position = None  # Store the mouse click position
 
     def createEditor(
         self,
         parent: Optional[QWidget],
         option: QStyleOptionViewItem,
         index: QModelIndex,
-    ) -> Optional[QWidget]:
+    ) -> Optional[QDoubleSpinBox | QPlainTextEdit]:
         """
         Intercept createEditor call and make row just a little bit taller
         """
 
-        self.editor: QDoubleSpinBox | QPlainTextEdit
+        editor: QDoubleSpinBox | QPlainTextEdit
 
         self.signals = MusicMusterSignals()
         self.signals.enable_escape_signal.emit(False)
+
         if isinstance(self.parent(), PlaylistTab):
             p = cast(PlaylistTab, self.parent())
+
         if index.column() == Col.INTRO.value:
-            self.editor = QDoubleSpinBox(parent)
-            self.editor.setDecimals(1)
-            self.editor.setSingleStep(0.1)
-            return self.editor
+            editor = QDoubleSpinBox(parent)
+            editor.setDecimals(1)
+            editor.setSingleStep(0.1)
+            return editor
         elif isinstance(index.data(), str):
-            self.editor = QPlainTextEdit(parent)
+            editor = QPlainTextEdit(parent)
+            editor.setGeometry(option.rect)  # Match the cell geometry
             row = index.row()
             row_height = p.rowHeight(row)
             p.setRowHeight(row, row_height + Config.MINIMUM_ROW_HEIGHT)
-            return self.editor
+            return editor
+
         return super().createEditor(parent, option, index)
 
     def destroyEditor(self, editor: Optional[QWidget], index: QModelIndex) -> None:
@@ -101,31 +107,53 @@ class EscapeDelegate(QStyledItemDelegate):
         self.signals.enable_escape_signal.emit(True)
         return super().destroyEditor(editor, index)
 
+    def editorEvent(
+        self, event: QEvent, model: QAbstractItemModel, option, index: QModelIndex
+    ) -> bool:
+        """Capture mouse click position."""
+
+        if event.type() == QEvent.Type.MouseButtonPress:
+            self.click_position = event.pos()
+        return super().editorEvent(event, model, option, index)
+
     def eventFilter(self, editor: Optional[QObject], event: Optional[QEvent]) -> bool:
         """By default, QPlainTextEdit doesn't handle enter or return"""
 
         if editor is None or event is None:
-            return False
+            return super().eventFilter(editor, event)
 
-        if event.type() == QEvent.Type.KeyPress:
+        if event.type() == QEvent.Type.Show:
+            if self.click_position and isinstance(editor, QPlainTextEdit):
+                # Map click position to editor's local space
+                local_click_position = editor.mapFromParent(self.click_position)
+
+                # Move cursor to the calculated position
+                cursor = editor.cursorForPosition(local_click_position)
+                editor.setTextCursor(cursor)
+
+                # Reset click position
+                self.click_position = None
+
+            return super().eventFilter(editor, event)
+
+        elif event.type() == QEvent.Type.KeyPress:
             key_event = cast(QKeyEvent, event)
             if key_event.key() == Qt.Key.Key_Return:
                 if key_event.modifiers() == (Qt.KeyboardModifier.ControlModifier):
                     self.commitData.emit(editor)
                     self.closeEditor.emit(editor)
                     return True
+
             elif key_event.key() == Qt.Key.Key_Escape:
                 # Close editor if no changes have been made
                 data_modified = False
-                if isinstance(self.editor, QPlainTextEdit):
+                if isinstance(editor, QPlainTextEdit):
+                    data_modified = self.original_model_data != editor.toPlainText()
+                elif isinstance(editor, QDoubleSpinBox):
                     data_modified = (
-                        self.original_model_data == self.editor.toPlainText()
+                        self.original_model_data != int(editor.value()) * 1000
                     )
-                elif isinstance(self.editor, QDoubleSpinBox):
-                    data_modified = (
-                        self.original_model_data == int(self.editor.value()) * 1000
-                    )
-                if data_modified:
+                if not data_modified:
                     self.closeEditor.emit(editor)
                     return True
 
@@ -135,6 +163,7 @@ class EscapeDelegate(QStyledItemDelegate):
                 if discard_edits == QMessageBox.StandardButton.Yes:
                     self.closeEditor.emit(editor)
                     return True
+
         return False
 
     def setEditorData(self, editor, index):
@@ -153,9 +182,9 @@ class EscapeDelegate(QStyledItemDelegate):
         proxy_model = index.model()
         edit_index = proxy_model.mapToSource(index)
 
-        if isinstance(self.editor, QPlainTextEdit):
+        if isinstance(editor, QPlainTextEdit):
             value = editor.toPlainText().strip()
-        elif isinstance(self.editor, QDoubleSpinBox):
+        elif isinstance(editor, QDoubleSpinBox):
             value = editor.value()
         self.source_model.setData(edit_index, value, Qt.ItemDataRole.EditRole)