Start

linedance-app/ui/vu_meter.py

@@ -0,0 +1,96 @@
+"""
+vu_meter.py — VU-meter widget der tegner L og R kanaler.
+Opdateres via set_levels(left, right) med værdier 0.0–1.0.
+"""
+
+from PyQt6.QtWidgets import QWidget
+from PyQt6.QtCore import Qt, QTimer
+from PyQt6.QtGui import QPainter, QColor
+import random
+
+
+NUM_BARS   = 14
+BAR_W      = 14
+BAR_H      = 4
+BAR_GAP    = 2
+CHAN_GAP   = 6
+PADDING    = 4
+
+COLOR_OFF    = QColor("#1a2218")
+COLOR_GREEN  = QColor("#28a050")
+COLOR_YELLOW = QColor("#c8a020")
+COLOR_RED    = QColor("#c83020")
+
+# Grænser for farver (bar-indeks fra bunden)
+YELLOW_FROM = NUM_BARS - 4
+RED_FROM    = NUM_BARS - 2
+
+
+class VUMeter(QWidget):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._left  = 0.0
+        self._right = 0.0
+        self._peak_l = 0.0
+        self._peak_r = 0.0
+        self._dark = True
+
+        total_h = NUM_BARS * (BAR_H + BAR_GAP) + PADDING * 2 + 16  # +16 til label
+        total_w = (BAR_W + CHAN_GAP) * 2 + PADDING * 2
+        self.setFixedSize(total_w, total_h)
+
+    def set_dark(self, dark: bool):
+        self._dark = dark
+        self.update()
+
+    def set_levels(self, left: float, right: float):
+        """Sæt niveauer 0.0–1.0. Kaldes fra afspiller-tråden via signal."""
+        self._left  = max(0.0, min(1.0, left))
+        self._right = max(0.0, min(1.0, right))
+        self._peak_l = max(self._peak_l * 0.92, self._left)
+        self._peak_r = max(self._peak_r * 0.92, self._right)
+        self.update()
+
+    def reset(self):
+        self._left = self._right = self._peak_l = self._peak_r = 0.0
+        self.update()
+
+    def paintEvent(self, event):
+        painter = QPainter(self)
+        painter.setRenderHint(QPainter.RenderHint.Antialiasing)
+
+        off_color = QColor("#d0d8cc") if not self._dark else COLOR_OFF
+
+        for ch_idx, level in enumerate([self._left, self._right]):
+            x = PADDING + ch_idx * (BAR_W + CHAN_GAP)
+            active_bars = int(level * NUM_BARS)
+
+            for bar_idx in range(NUM_BARS):
+                y = PADDING + (NUM_BARS - 1 - bar_idx) * (BAR_H + BAR_GAP)
+
+                if bar_idx < active_bars:
+                    if bar_idx >= RED_FROM:
+                        color = COLOR_RED
+                    elif bar_idx >= YELLOW_FROM:
+                        color = COLOR_YELLOW
+                    else:
+                        color = COLOR_GREEN
+                else:
+                    color = off_color
+
+                painter.fillRect(x, y, BAR_W, BAR_H,
+                                 QColor(color.red(), color.green(), color.blue(), 220))
+
+        # Kanal-labels
+        label_y = PADDING + NUM_BARS * (BAR_H + BAR_GAP) + 4
+        painter.setPen(QColor("#5a6070"))
+        font = painter.font()
+        font.setPointSize(8)
+        font.setFamily("Courier New")
+        painter.setFont(font)
+
+        for ch_idx, label in enumerate(["L", "R"]):
+            x = PADDING + ch_idx * (BAR_W + CHAN_GAP) + BAR_W // 2
+            painter.drawText(x - 4, label_y + 10, label)
+
+        painter.end()