v0.45.1: the laser's Afterimage is a number box, like Line width

Type the seconds, or step by 0.05 with the arrows or ↑/↓; it reads "Off"
at zero. Line width and Afterimage now share one number-box helper.

lintunes/__init__.py

@@ -1,3 +1,3 @@
 """LinTunes — iTunes-style music library manager and player for Linux."""
 
-__version__ = "0.45.0"
+__version__ = "0.45.1"

lintunes/gui/preferences_dialog.py

@@ -507,16 +507,18 @@ class PreferencesDialog(QDialog):
         laser = QWidget()
         form = self._viz_form(laser)
         self._preset_row(form, "laser")
-        self._laser_fade_slider, _ = self._viz_slider(
+        self._laser_fade_box = self._viz_spinbox(
             form, "Afterimage:", "visualizer_laser_afterimage", config,
-            scale=20, fmt=_fade_text,
+            step=0.05, decimals=2, suffix=" s", off_text="Off",
             tip="How long past sweeps of the beam take to fade — 0 is none")
         self._speaker = self._speaker_range(form, config)
         # The look controls on the left, and beside them a drawing of the
         # rig the settings describe — it labels the distance, the angles
         # and the dot, so those sliders carry no number of their own.
         looks = self._viz_form(None)
-        self._width_box = self._width_spinbox(looks, config)
+        self._width_box = self._viz_spinbox(
+            looks, "Line width:", "visualizer_laser_width", config,
+            step=0.5, decimals=1, suffix=" px")
         self._glow = self._viz_check(
             looks, "Glow", "visualizer_laser_glow", config,
             tip="The haze around the beam")
@@ -583,27 +585,31 @@ class PreferencesDialog(QDialog):
             QFormLayout.FieldGrowthPolicy.AllNonFixedFieldsGrow)
         return form
 
-    def _width_spinbox(self, form, config) -> QDoubleSpinBox:
-        """Line width as a number: type it, or step it by half a pixel with
-        the arrows (buttons or keys)."""
-        lo, hi = visualizer_styles.LIMITS["visualizer_laser_width"]
+    def _viz_spinbox(self, form, label, key, config, *, step, decimals,
+                     suffix, off_text="", tip="") -> QDoubleSpinBox:
+        """A setting as a number: type it, or step it with the arrows
+        (buttons or ↑/↓). ``off_text`` is shown in place of the minimum."""
+        lo, hi = visualizer_styles.LIMITS[key]
         box = QDoubleSpinBox()
         box.setRange(lo, hi)
-        box.setSingleStep(0.5)
-        box.setDecimals(1)
-        box.setSuffix(" px")
-        box.setValue(config["visualizer_laser_width"])     # before connect
+        box.setSingleStep(step)
+        box.setDecimals(decimals)
+        box.setSuffix(suffix)
+        box.setToolTip(tip)
+        if off_text:
+            box.setSpecialValueText(off_text)
+        box.setValue(config[key])     # before connect
 
         def changed(value):
-            self._prefs.set_live("visualizer_laser_width", value)
+            self._prefs.set_live(key, value)
             self._color_save_timer.start()
 
         box.valueChanged.connect(changed)
         row = QHBoxLayout()
         row.addWidget(box)
         row.addStretch()
-        form.addRow("Line width:", row)
-        self._viz_setters["visualizer_laser_width"] = box.setValue
+        form.addRow(label, row)
+        self._viz_setters[key] = box.setValue
         return box
 
     # ---- Visualizer presets ----

tests/test_round78.py

@@ -614,12 +614,15 @@ class TestPreferencesPage:
         prefs = Preferences(tmp_path)
         dialog = self._dialog(prefs)
         for slider, key in ((dialog._bars_fade_slider, "visualizer_bars_fade"),
-                            (dialog._fade_slider, "visualizer_ghost_fade"),
-                            (dialog._laser_fade_slider,
-                             "visualizer_laser_afterimage")):
+                            (dialog._fade_slider, "visualizer_ghost_fade")):
             assert slider.minimum() == 0             # 0 = off
             slider.setValue(10)
             assert prefs.get(key) == 0.5
+        # The laser's is a number box, like Line width.
+        box = dialog._laser_fade_box
+        assert box.minimum() == 0
+        box.setValue(0.5)
+        assert prefs.get("visualizer_laser_afterimage") == 0.5
 
     def test_laser_settings(self, qapp, tmp_path):
         prefs = Preferences(tmp_path)

tests/test_round79.py

@@ -282,3 +282,16 @@ class TestCopyAsText:
         from lintunes.gui.track_table import song_line
         from lintunes.models import Track
         assert song_line(Track(track_id=9, name="", artist="X")) == "X - Untitled"
+
+
+class TestAfterimageBox:
+    def test_steps_by_a_twentieth_and_reads_off_at_zero(self, qapp, tmp_path):
+        prefs = Preferences(tmp_path)
+        box = _prefs_dialog(prefs)._laser_fade_box
+        assert box.value() == pytest.approx(0.1)       # the default
+        box.stepUp()
+        assert prefs.get("visualizer_laser_afterimage") == pytest.approx(0.15)
+        box.setValue(0)
+        assert box.text() == "Off"
+        box.setValue(99)                                # past the top
+        assert box.value() == 3.0