fix audio-level meter

1 files changed, 33 insertions, 7 deletions

diff --git a/voctogui/lib/audioleveldisplay.py b/voctogui/lib/audioleveldisplay.py
index bc2a38f..f74c3f5 100644
--- a/voctogui/lib/audioleveldisplay.py
+++ b/voctogui/lib/audioleveldisplay.py
@@ -9,17 +9,43 @@ class AudioLevelDisplay(object):
 
 		self.drawing_area = drawing_area
 
-		self.levelrms = [0, 0]  # Initialize to []
+		self.levelrms = []
 		self.drawing_area.connect('draw', self.on_draw)
 
-
 	def on_draw(self, widget, cr):
-		cr.set_source_rgb(1, 1, 1)
-		cr.set_line_width(10)
+		channels = len(self.levelrms)
+
+		if channels == 0:
+			return
+
+		width = self.drawing_area.get_allocated_width()
+		height = self.drawing_area.get_allocated_height()
+
+		strip_width = int(width / 2)
+		#self.log.debug('width: %u, strip_width: %u', width, strip_width)
+
+		cr.set_line_width(strip_width)
+
+		maxdb = -75
+
+		for idx, level in enumerate(self.levelrms):
+			level = level / maxdb
+
+			x = idx * strip_width + strip_width/2
+			#self.log.debug('x: %u', x)
+
+			cr.move_to(x, height)
+			cr.line_to(x, height * level)
+
+			if idx % 2 == 0:
+				cr.set_source_rgb(1, 0, 0)
+			else:
+				cr.set_source_rgb(0, 1, 0)
+
+			cr.stroke()
 
-		cr.move_to(15, 0)
-		cr.line_to(15, self.levelrms[0]*-20)  # Work with 0+ Channels
-		cr.stroke()
+		return True
 
 	def level_callback(self, peaks, rms):
 		self.levelrms = rms
+		self.drawing_area.queue_draw()