Initial revision

diff --git a/Lib/lib-stdwin/Histogram.py b/Lib/lib-stdwin/Histogram.py
new file mode 100644 (file)
index 0000000..a023938
--- /dev/null
+++ b/Lib/lib-stdwin/Histogram.py
@@ -0,0 +1,49 @@
+# Module 'Histogram'
+
+from Buttons import *
+
+
+# A Histogram displays a histogram of numeric data.
+# It reacts to resize events by resizing itself,
+# leaving the same amount of space around the borders.
+#
+class HistogramAppearance() = LabelAppearance():
+       #
+       def define(self, (win, bounds, ydata, scale)):
+               self.init_appearance(win, bounds)
+               self.ydata = ydata
+               self.scale = scale # (min, max)
+               self.left_top, (right, bottom) = bounds
+               width, height = win.getwinsize()
+               self.right_margin = width - right
+               self.bottom_margin = height - bottom
+               return self
+       #
+       def setdata(self, (ydata, scale)):
+               self.ydata = ydata
+               self.scale = scale # (min, max)
+               self.win.change(self.bounds)
+       #
+       def drawit(self, d):
+               ydata = self.ydata
+               (left, top), (right, bottom) = self.bounds
+               min, max = self.scale
+               size = max-min
+               width, height = right-left, bottom-top
+               for i in range(len(ydata)):
+                       h0 = left + i * width/len(ydata)
+                       h1 = left + (i+1) * width/len(ydata)
+                       v0 = top + height - (self.ydata[i]-min)*height/size
+                       v1 = top + height
+                       d.paint((h0, v0), (h1, v1))
+       #
+       def resize(self):
+               width, height = self.win.getwinsize()
+               right = width - self.right_margin
+               bottom = height - self.bottom_margin
+               self.setbounds(self.left_top, (right, bottom))
+       #
+
+class HistogramReactivity() = NoReactivity(): pass
+
+class Histogram() = HistogramAppearance(), HistogramReactivity(): pass

diff --git a/Lib/lib-stdwin/Soundogram.py b/Lib/lib-stdwin/Soundogram.py
new file mode 100644 (file)
index 0000000..a362eb2
--- /dev/null
+++ b/Lib/lib-stdwin/Soundogram.py
@@ -0,0 +1,37 @@
+# Module 'Soundogram'
+
+import audio
+from minmax import min, max
+from Histogram import Histogram
+
+class Soundogram() = Histogram():
+       #
+       def define(self, (win, chunk)):
+               width, height = corner = win.getwinsize()
+               bounds = (0, 0), corner
+               self.chunk = chunk
+               self.step = (len(chunk)-1)/(width/2+1) + 1
+               ydata = _make_ydata(chunk, self.step)
+               return Histogram.define(self, (win, bounds, ydata, (0, 128)))
+       #
+       def setchunk(self, chunk):
+               self.chunk = chunk
+               self.recompute()
+       #
+       def recompute(self):
+               (left, top), (right, bottom) = self.bounds
+               width = right - left
+               self.step = (len(chunk)-1)/width + 1
+               ydata = _make_ydata(chunk, self.step)
+               self.setdata(ydata, (0, 128))
+       #
+
+
+def _make_ydata(chunk, step):
+       ydata = []
+       for i in range(0, len(chunk), step):
+               piece = audio.chr2num(chunk[i:i+step])
+               mi, ma = min(piece), max(piece)
+               y = max(abs(mi), abs(ma))
+               ydata.append(y)
+       return ydata

diff --git a/Lib/stdwin/Histogram.py b/Lib/stdwin/Histogram.py
new file mode 100755 (executable)
index 0000000..a023938
--- /dev/null
+++ b/Lib/stdwin/Histogram.py
@@ -0,0 +1,49 @@
+# Module 'Histogram'
+
+from Buttons import *
+
+
+# A Histogram displays a histogram of numeric data.
+# It reacts to resize events by resizing itself,
+# leaving the same amount of space around the borders.
+#
+class HistogramAppearance() = LabelAppearance():
+       #
+       def define(self, (win, bounds, ydata, scale)):
+               self.init_appearance(win, bounds)
+               self.ydata = ydata
+               self.scale = scale # (min, max)
+               self.left_top, (right, bottom) = bounds
+               width, height = win.getwinsize()
+               self.right_margin = width - right
+               self.bottom_margin = height - bottom
+               return self
+       #
+       def setdata(self, (ydata, scale)):
+               self.ydata = ydata
+               self.scale = scale # (min, max)
+               self.win.change(self.bounds)
+       #
+       def drawit(self, d):
+               ydata = self.ydata
+               (left, top), (right, bottom) = self.bounds
+               min, max = self.scale
+               size = max-min
+               width, height = right-left, bottom-top
+               for i in range(len(ydata)):
+                       h0 = left + i * width/len(ydata)
+                       h1 = left + (i+1) * width/len(ydata)
+                       v0 = top + height - (self.ydata[i]-min)*height/size
+                       v1 = top + height
+                       d.paint((h0, v0), (h1, v1))
+       #
+       def resize(self):
+               width, height = self.win.getwinsize()
+               right = width - self.right_margin
+               bottom = height - self.bottom_margin
+               self.setbounds(self.left_top, (right, bottom))
+       #
+
+class HistogramReactivity() = NoReactivity(): pass
+
+class Histogram() = HistogramAppearance(), HistogramReactivity(): pass

diff --git a/Lib/stdwin/Soundogram.py b/Lib/stdwin/Soundogram.py
new file mode 100755 (executable)
index 0000000..a362eb2
--- /dev/null
+++ b/Lib/stdwin/Soundogram.py
@@ -0,0 +1,37 @@
+# Module 'Soundogram'
+
+import audio
+from minmax import min, max
+from Histogram import Histogram
+
+class Soundogram() = Histogram():
+       #
+       def define(self, (win, chunk)):
+               width, height = corner = win.getwinsize()
+               bounds = (0, 0), corner
+               self.chunk = chunk
+               self.step = (len(chunk)-1)/(width/2+1) + 1
+               ydata = _make_ydata(chunk, self.step)
+               return Histogram.define(self, (win, bounds, ydata, (0, 128)))
+       #
+       def setchunk(self, chunk):
+               self.chunk = chunk
+               self.recompute()
+       #
+       def recompute(self):
+               (left, top), (right, bottom) = self.bounds
+               width = right - left
+               self.step = (len(chunk)-1)/width + 1
+               ydata = _make_ydata(chunk, self.step)
+               self.setdata(ydata, (0, 128))
+       #
+
+
+def _make_ydata(chunk, step):
+       ydata = []
+       for i in range(0, len(chunk), step):
+               piece = audio.chr2num(chunk[i:i+step])
+               mi, ma = min(piece), max(piece)
+               y = max(abs(mi), abs(ma))
+               ydata.append(y)
+       return ydata