feat: move audio editor selection with ctrl drag

tests/test_ui_structure.py

@@ -671,6 +671,43 @@ def test_waveform_click_sets_playhead_without_changing_selection(win):
     assert abs((w.playhead() or 0.0) - 7.0) < 0.05
 
 
+def test_waveform_ctrl_drag_moves_selection_without_moving_playhead(win):
+    from PyQt6.QtCore import QEvent, QPointF, Qt
+    from PyQt6.QtGui import QMouseEvent
+    w = win._wave
+    w.resize(400, 96)
+    w.set_view(0.0, 10.0)
+    w.set_selection(2.0, 4.0)
+    w.set_playhead(7.0)
+    got_sel = []
+    got_play = []
+    w.selection_changed.connect(lambda s, e: got_sel.append((s, e)))
+    w.playhead_changed.connect(lambda t: got_play.append(t))
+
+    press = QMouseEvent(
+        QEvent.Type.MouseButtonPress, QPointF(w._t_to_px(3.0), 20),
+        Qt.MouseButton.LeftButton, Qt.MouseButton.LeftButton,
+        Qt.KeyboardModifier.ControlModifier)
+    move = QMouseEvent(
+        QEvent.Type.MouseMove, QPointF(w._t_to_px(5.0), 20),
+        Qt.MouseButton.NoButton, Qt.MouseButton.LeftButton,
+        Qt.KeyboardModifier.ControlModifier)
+    release = QMouseEvent(
+        QEvent.Type.MouseButtonRelease, QPointF(w._t_to_px(5.0), 20),
+        Qt.MouseButton.LeftButton, Qt.MouseButton.NoButton,
+        Qt.KeyboardModifier.ControlModifier)
+    w.mousePressEvent(press)
+    w.mouseMoveEvent(move)
+    w.mouseReleaseEvent(release)
+
+    s, e = w.selection()
+    assert abs(s - 4.0) < 0.05
+    assert abs(e - 6.0) < 0.05
+    assert got_sel and abs(got_sel[-1][0] - 4.0) < 0.05
+    assert got_play == []
+    assert abs((w.playhead() or 0.0) - 7.0) < 0.05
+
+
 def test_waveform_drag_emits_selection(win):
     w = win._wave
     w.resize(400, 96)