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70 lines
1.8 KiB
Python
Executable file
70 lines
1.8 KiB
Python
Executable file
# Module 'StripChart'
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import rect
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from Buttons import LabelAppearance, NoReactivity
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# A StripChart doesn't really look like a label but it needs a base class.
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# LabelAppearance allows it to be disabled and hilited.
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class StripChart(LabelAppearance, NoReactivity):
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#
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def define(self, (parent, scale)):
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self.parent = parent
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parent.addchild(self)
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self.init_appearance()
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self.init_reactivity()
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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 destroy(self):
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self.parent = 0
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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 self.bounds <> rect.empty:
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self.parent.scroll(self.bounds, (-excess, 0))
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if self.bounds <> rect.empty:
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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.parent.begindrawing(), area)
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#
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def draw(self, (d, area)):
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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()
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