kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
64 wiersze
2.2 KiB
Python
64 wiersze
2.2 KiB
Python
# meter.py Meter class for nano-gui
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2018-2020 Peter Hinch
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from gui.core.nanogui import DObject
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from gui.widgets.label import Label
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class Meter(DObject):
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BAR = 1
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LINE = 0
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def __init__(self, writer, row, col, *, height=50, width=10,
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fgcolor=None, bgcolor=None, ptcolor=None, bdcolor=None,
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divisions=5, label=None, style=0, legends=None, value=None):
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super().__init__(writer, row, col, height, width, fgcolor, bgcolor, bdcolor)
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self.divisions = divisions
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if label is not None:
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Label(writer, row + height + 3, col, label)
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self.style = style
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if legends is not None: # Legends
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x = col + width + 4
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y = row + height
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dy = 0 if len(legends) <= 1 else height / (len(legends) -1)
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yl = y - writer.height / 2 # Start at bottom
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for legend in legends:
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Label(writer, int(yl), x, legend)
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yl -= dy
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self.ptcolor = ptcolor if ptcolor is not None else self.fgcolor
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self.value(value)
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def value(self, n=None, color=None):
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if n is None:
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return super().value()
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n = super().value(min(1, max(0, n)))
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if color is not None:
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self.ptcolor = color
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self.show()
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return n
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def show(self):
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super().show() # Draw or erase border
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val = super().value()
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wri = self.writer
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dev = self.device
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width = self.width
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height = self.height
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x0 = self.col
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x1 = self.col + width
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y0 = self.row
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y1 = self.row + height
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if self.divisions > 0:
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dy = height / (self.divisions) # Tick marks
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for tick in range(self.divisions + 1):
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ypos = int(y0 + dy * tick)
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dev.hline(x0 + 2, ypos, x1 - x0 - 4, self.fgcolor)
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y = int(y1 - val * height) # y position of slider
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if self.style == self.LINE:
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dev.hline(x0, y, width, self.ptcolor) # Draw pointer
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else:
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w = width / 2
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dev.fill_rect(int(x0 + w - 2), y, 4, y1 - y, self.ptcolor)
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