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gvanrossumgvanrossum
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1 parent 6acc1b5 commit 36ddc9e

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‎Lib/lib-stdwin/StripChart.py‎

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# Module 'StripChart'
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import rect
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from Buttons import *
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from Resize import *
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class StripChart() = LabelAppearance(), NoReactivity(), NoResize():
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#
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def define(self, (win, bounds, scale)):
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self.init_appearance(win, bounds)
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self.init_reactivity()
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self.init_resize()
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self.ydata = []
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self.scale = scale
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self.resetbounds()
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return self
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#
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def setbounds(self, bounds):
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LabelAppearance.setbounds(self, bounds)
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self.resetbounds()
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#
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def resetbounds(self):
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(left, top), (right, bottom) = self.bounds
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self.width = right-left
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self.height = bottom-top
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excess = len(self.ydata) - self.width
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if excess > 0:
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del self.ydata[:excess]
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elif excess < 0:
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while len(self.ydata) < self.width:
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self.ydata.insert(0, 0)
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#
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def append(self, y):
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self.ydata.append(y)
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excess = len(self.ydata) - self.width
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if excess > 0:
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del self.ydata[:excess]
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if not self.limbo:
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self.win.scroll(self.bounds, (-excess, 0))
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if not self.limbo:
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(left, top), (right, bottom) = self.bounds
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i = len(self.ydata)
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area = (left+i-1, top), (left+i, bottom)
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self.draw(self.win.begindrawing(), area)
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#
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def draw(self, (d, area)):
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self.limbo = 0
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area = rect.intersect(area, self.bounds)
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if area = rect.empty:
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return
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d.cliprect(area)
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d.erase(self.bounds)
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(a_left, a_top), (a_right, a_bottom) = area
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(left, top), (right, bottom) = self.bounds
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height = bottom - top
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i1 = a_left - left
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i2 = a_right - left
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for i in range(max(0, i1), min(len(self.ydata), i2)):
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split = bottom-self.ydata[i]*height/self.scale
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d.paint((left+i, split), (left+i+1, bottom))
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if not self.enabled:
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self.flipenable(d)
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if self.hilited:
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self.fliphilite(d)
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d.noclip()

‎Lib/lib-stdwin/VUMeter.py‎

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# Module VUMeter
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import audio
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from StripChart import StripChart
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K = 1024
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Rates = [0, 32*K, 16*K, 8*K]
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class VUMeter() = StripChart():
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#
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# Override define() and timer() methods
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#
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def define(self, (win, bounds)):
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self = StripChart.define(self, (win, bounds, 128))
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self.sampling = 0
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self.rate = 3
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self.enable(0)
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return self
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#
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def timer(self):
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if self.sampling:
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chunk = audio.wait_recording()
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self.sampling = 0
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nums = audio.chr2num(chunk)
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ampl = max(abs(min(nums)), abs(max(nums)))
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self.append(ampl)
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if self.enabled and not self.sampling:
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audio.setrate(self.rate)
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size = Rates[self.rate]/10
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size = size/48*48
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audio.start_recording(size)
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self.sampling = 1
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if self.sampling:
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self.win.settimer(1)
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#
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# New methods: start() and stop()
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#
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def stop(self):
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if self.sampling:
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chunk = audio.stop_recording()
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self.sampling = 0
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self.enable(0)
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#
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def start(self):
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self.enable(1)
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self.timer()

‎Lib/stdwin/StripChart.py‎

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# Module 'StripChart'
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import rect
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from Buttons import *
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from Resize import *
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class StripChart() = LabelAppearance(), NoReactivity(), NoResize():
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#
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def define(self, (win, bounds, scale)):
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self.init_appearance(win, bounds)
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self.init_reactivity()
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self.init_resize()
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self.ydata = []
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self.scale = scale
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self.resetbounds()
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return self
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#
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def setbounds(self, bounds):
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LabelAppearance.setbounds(self, bounds)
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self.resetbounds()
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#
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def resetbounds(self):
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(left, top), (right, bottom) = self.bounds
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self.width = right-left
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self.height = bottom-top
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excess = len(self.ydata) - self.width
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if excess > 0:
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del self.ydata[:excess]
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elif excess < 0:
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while len(self.ydata) < self.width:
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self.ydata.insert(0, 0)
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#
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def append(self, y):
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self.ydata.append(y)
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excess = len(self.ydata) - self.width
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if excess > 0:
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del self.ydata[:excess]
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if not self.limbo:
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self.win.scroll(self.bounds, (-excess, 0))
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if not self.limbo:
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(left, top), (right, bottom) = self.bounds
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i = len(self.ydata)
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area = (left+i-1, top), (left+i, bottom)
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self.draw(self.win.begindrawing(), area)
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#
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def draw(self, (d, area)):
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self.limbo = 0
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area = rect.intersect(area, self.bounds)
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if area = rect.empty:
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return
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d.cliprect(area)
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d.erase(self.bounds)
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(a_left, a_top), (a_right, a_bottom) = area
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(left, top), (right, bottom) = self.bounds
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height = bottom - top
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i1 = a_left - left
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i2 = a_right - left
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for i in range(max(0, i1), min(len(self.ydata), i2)):
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split = bottom-self.ydata[i]*height/self.scale
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d.paint((left+i, split), (left+i+1, bottom))
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if not self.enabled:
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self.flipenable(d)
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if self.hilited:
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self.fliphilite(d)
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d.noclip()

‎Lib/stdwin/VUMeter.py‎

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# Module VUMeter
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import audio
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from StripChart import StripChart
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K = 1024
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Rates = [0, 32*K, 16*K, 8*K]
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class VUMeter() = StripChart():
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#
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# Override define() and timer() methods
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#
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def define(self, (win, bounds)):
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self = StripChart.define(self, (win, bounds, 128))
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self.sampling = 0
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self.rate = 3
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self.enable(0)
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return self
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#
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def timer(self):
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if self.sampling:
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chunk = audio.wait_recording()
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self.sampling = 0
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nums = audio.chr2num(chunk)
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ampl = max(abs(min(nums)), abs(max(nums)))
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self.append(ampl)
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if self.enabled and not self.sampling:
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audio.setrate(self.rate)
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size = Rates[self.rate]/10
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size = size/48*48
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audio.start_recording(size)
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self.sampling = 1
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if self.sampling:
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self.win.settimer(1)
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#
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# New methods: start() and stop()
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#
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def stop(self):
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if self.sampling:
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chunk = audio.stop_recording()
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self.sampling = 0
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self.enable(0)
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#
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def start(self):
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self.enable(1)
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self.timer()

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