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further cleanup, get the tick marks pixel perfect

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Original commit message from CVS:
further cleanup, get the tick marks pixel perfect
This commit is contained in:
Thomas Vander Stichele 2005-09-24 12:17:59 +00:00
parent ea0f5ff24b
commit 5f3ff797a5
2 changed files with 32 additions and 20 deletions
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37
examples/fvumeter.py
View file

@ -172,26 +172,32 @@ class FVUMeter(gtk.DrawingArea):
vumeter_width,
vumeter_height)
# draw peak level
# 0 maps to width of 0, full scale maps to total width
peaklevelpct = self.iec_scale(self.peaklevel)
peakwidth = int(vumeter_width * (peaklevelpct/100))
peakwidth = int(vumeter_width * (peaklevelpct / 100))
draw_gc = self.green_gc
if self.peaklevel >= self.orange_threshold:
draw_gc = self.orange_gc
if self.peaklevel >= self.red_threshold:
draw_gc = self.red_gc
self.window.draw_rectangle(draw_gc, True,
self.leftborder, self.topborder,
peakwidth, vumeter_height)
if peakwidth > 0:
self.window.draw_rectangle(draw_gc, True,
self.leftborder, self.topborder,
peakwidth, vumeter_height)
# draw yellow decay level
if self.decaylevel > -90.0:
decaylevelpct = self.iec_scale(self.decaylevel)
decaywidth = int(vumeter_width * (decaylevelpct/100))
decaywidth = int(vumeter_width) * (decaylevelpct / 100)
# cheat the geometry by drawing 0% level at pixel 0,
# which is same position as just above 0%
if decaywidth == 0:
decaywidth = 1
self.window.draw_line(self.yellow_gc,
self.leftborder + decaywidth,
self.leftborder + decaywidth - 1,
self.topborder,
self.leftborder + decaywidth,
self.topborder + vumeter_height)
self.leftborder + decaywidth - 1,
self.topborder + vumeter_height - 1)
# draw tick marks
scalers = [
@ -204,18 +210,19 @@ class FVUMeter(gtk.DrawingArea):
( '0', 1.0),
]
for level, scale in scalers:
# tick mark, 6 pixels high
# we cheat again here by putting the 0 at the first pixel
self.window.draw_line(self.style.black_gc,
self.leftborder + int (scale * vumeter_width),
self.leftborder + int(scale * (vumeter_width - 1)),
h - self.bottomborder,
self.leftborder + int(scale * vumeter_width),
self.leftborder + int(scale * (vumeter_width - 1)),
h - self.bottomborder + 5)
self.window.draw_line(self.style.black_gc,
self.leftborder, h - self.bottomborder,
self.leftborder, h - self.bottomborder + 5)
# tick label
layout = self.create_pango_layout(level)
layout_width, layout_height = layout.get_pixel_size()
self.window.draw_layout(self.style.black_gc,
self.leftborder + int(scale * vumeter_width) - int(layout_width / 2),
self.leftborder + int(scale * vumeter_width)
- int(layout_width / 2),
h - self.bottomborder + 7, layout)
# draw the peak level to the right
@ -223,7 +230,7 @@ class FVUMeter(gtk.DrawingArea):
layout_width, layout_height = layout.get_pixel_size()
self.window.draw_layout(self.style.black_gc,
self.leftborder + vumeter_width + 5,
self.topborder + int(vumeter_height/2 - layout_height/2),
self.topborder + int(vumeter_height / 2 - layout_height / 2),
layout)
gobject.type_register(FVUMeter)

13
examples/vumeter.py
View file

@ -73,10 +73,15 @@ class Window(gtk.Dialog):
if message.structure.get_name() == 'level':
s = message.structure
for i in range(0, len(s['peak'])):
self.vus[i].set_property('peak',
clamp(s['peak'][i], -90.0, 0.0))
self.vus[i].set_property('decay',
clamp(s['decay'][i], -90.0, 0.0))
self.vus[i].freeze_notify()
decay = clamp(s['decay'][i], -90.0, 0.0)
peak = clamp(s['peak'][i], -90.0, 0.0)
print "decay/peak", decay, peak
if peak > decay:
print "ERROR: peak bigger than decay!"
self.vus[i].set_property('decay', decay)
self.vus[i].set_property('peak', peak)
return True
def run(self):