abstracting display, touch and sd
This commit is contained in:
Adolfo Reyna
106
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/dial.py
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106
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/dial.py
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# dial.py Dial and Pointer classes 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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import cmath
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from gui.core.nanogui import DObject, circle, fillcircle
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from gui.widgets.label import Label
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# Line defined by polar coords; origin and line are complex
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def polar(dev, origin, line, color):
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xs, ys = origin.real, origin.imag
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theta = cmath.polar(line)[1]
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dev.line(round(xs), round(ys), round(xs + line.real), round(ys - line.imag), color)
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def conj(v): # complex conjugate
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return v.real - v.imag * 1j
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# Draw an arrow; origin and vec are complex, scalar lc defines length of chevron.
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# cw and ccw are unit vectors of +-3pi/4 radians for chevrons (precompiled)
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def arrow(dev, origin, vec, lc, color, ccw=cmath.exp(3j * cmath.pi/4), cw=cmath.exp(-3j * cmath.pi/4)):
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length, theta = cmath.polar(vec)
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uv = cmath.rect(1, theta) # Unit rotation vector
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start = -vec
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if length > 3 * lc: # If line is long
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ds = cmath.rect(lc, theta)
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start += ds # shorten to allow for length of tail chevrons
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chev = lc + 0j
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polar(dev, origin, vec, color) # Origin to tip
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polar(dev, origin, start, color) # Origin to tail
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polar(dev, origin + conj(vec), chev*ccw*uv, color) # Tip chevron
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polar(dev, origin + conj(vec), chev*cw*uv, color)
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if length > lc: # Confusing appearance of very short vectors with tail chevron
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polar(dev, origin + conj(start), chev*ccw*uv, color) # Tail chevron
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polar(dev, origin + conj(start), chev*cw*uv, color)
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class Pointer():
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def __init__(self, dial):
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self.dial = dial
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self.val = 0 + 0j
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self.color = None
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def value(self, v=None, color=None):
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self.color = color
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if v is not None:
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if isinstance(v, complex):
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l = cmath.polar(v)[0]
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if l > 1:
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self.val = v/l
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else:
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self.val = v
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else:
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raise ValueError('Pointer value must be complex.')
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self.dial.vectors.add(self)
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self.dial._set_pend(self.dial) # avoid redrawing for each vector
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return self.val
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class Dial(DObject):
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CLOCK = 0
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COMPASS = 1
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def __init__(self, writer, row, col, *, height=50,
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fgcolor=None, bgcolor=None, bdcolor=False, ticks=4,
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label=None, style=0, pip=None):
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super().__init__(writer, row, col, height, height, fgcolor, bgcolor, bdcolor)
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self.style = style
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self.pip = self.fgcolor if pip is None else pip
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if label is not None:
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self.label = Label(writer, row + height + 3, col, label)
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radius = int(height / 2)
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self.radius = radius
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self.ticks = ticks
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self.xorigin = col + radius
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self.yorigin = row + radius
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self.vectors = set()
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def show(self):
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super().show()
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# cache bound variables
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dev = self.device
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ticks = self.ticks
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radius = self.radius
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xo = self.xorigin
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yo = self.yorigin
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# vectors (complex)
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vor = xo + 1j * yo
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vtstart = 0.9 * radius + 0j # start of tick
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vtick = 0.1 * radius + 0j # tick
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vrot = cmath.exp(2j * cmath.pi/ticks) # unit rotation
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for _ in range(ticks):
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polar(dev, vor + conj(vtstart), vtick, self.fgcolor)
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vtick *= vrot
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vtstart *= vrot
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circle(dev, xo, yo, radius, self.fgcolor)
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vshort = 1000 # Length of shortest vector
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for v in self.vectors:
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color = self.fgcolor if v.color is None else v.color
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val = v.value() * radius # val is complex
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vshort = min(vshort, cmath.polar(val)[0])
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if self.style == Dial.CLOCK:
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polar(dev, vor, val, color)
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else:
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arrow(dev, vor, val, 5, color)
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if isinstance(self.pip, int) and vshort > 5:
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fillcircle(dev, xo, yo, 2, self.pip)
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45
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/label.py
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45
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/label.py
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# label.py Label 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.core.writer import Writer
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# text: str display string int save width
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class Label(DObject):
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def __init__(self, writer, row, col, text, invert=False, fgcolor=None, bgcolor=None, bdcolor=False):
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# Determine width of object
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if isinstance(text, int):
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width = text
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text = None
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else:
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width = writer.stringlen(text)
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height = writer.height
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super().__init__(writer, row, col, height, width, fgcolor, bgcolor, bdcolor)
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if text is not None:
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self.value(text, invert)
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def value(self, text=None, invert=False, fgcolor=None, bgcolor=None, bdcolor=None):
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txt = super().value(text)
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# Redraw even if no text supplied: colors may have changed.
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self.invert = invert
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self.fgcolor = self.def_fgcolor if fgcolor is None else fgcolor
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self.bgcolor = self.def_bgcolor if bgcolor is None else bgcolor
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if bdcolor is False:
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self.def_bdcolor = False
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self.bdcolor = self.def_bdcolor if bdcolor is None else bdcolor
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self.show()
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return txt
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def show(self):
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txt = super().value()
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if txt is None: # No content to draw. Future use.
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return
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super().show() # Draw or erase border
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wri = self.writer
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dev = self.device
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Writer.set_textpos(dev, self.row, self.col)
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wri.setcolor(self.fgcolor, self.bgcolor)
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wri.printstring(txt, self.invert)
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wri.setcolor() # Restore defaults
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28
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/led.py
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28
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/led.py
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# led.py LED 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, fillcircle, circle
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from gui.widgets.label import Label
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class LED(DObject):
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def __init__(self, writer, row, col, *, height=12,
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fgcolor=None, bgcolor=None, bdcolor=None, label=None):
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super().__init__(writer, row, col, height, height, fgcolor, bgcolor, bdcolor)
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if label is not None:
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self.label = Label(writer, row + height + 3, col, label)
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self.radius = self.height // 2
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def color(self, c=None):
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self.fgcolor = self.bgcolor if c is None else c
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self.show()
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def show(self):
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super().show()
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wri = self.writer
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dev = self.device
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r = self.radius
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fillcircle(dev, self.col + r, self.row + r, r, self.fgcolor)
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if isinstance(self.bdcolor, int):
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circle(dev, self.col + r, self.row + r, r, self.bdcolor)
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63
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/meter.py
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63
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/meter.py
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# 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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123
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/scale.py
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123
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/scale.py
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# scale.py Extension to nano-gui providing the Scale class
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2020 Peter Hinch
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# Usage:
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# from gui.widgets.scale import Scale
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from gui.core.nanogui import DObject
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from gui.core.writer import Writer
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from gui.core.colors import BLACK
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class Scale(DObject):
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def __init__(self, writer, row, col, *,
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ticks=200, legendcb=None, tickcb=None,
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height=0, width=100, bdcolor=None, fgcolor=None, bgcolor=None,
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pointercolor=None, fontcolor=None):
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if ticks % 2:
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raise ValueError('ticks arg must be divisible by 2')
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self.ticks = ticks
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self.tickcb = tickcb
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def lcb(f):
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return '{:3.1f}'.format(f)
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self.legendcb = legendcb if legendcb is not None else lcb
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bgcolor = BLACK if bgcolor is None else bgcolor
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text_ht = writer.font.height()
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ctrl_ht = 12 # Minimum height for ticks
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# Add 2 pixel internal border to give a little more space
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min_ht = text_ht + 6 # Ht of text, borders and gap between text and ticks
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if height < min_ht + ctrl_ht:
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height = min_ht + ctrl_ht # min workable height
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else:
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ctrl_ht = height - min_ht # adjust ticks for greater height
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width &= 0xfffe # Make divisible by 2: avoid 1 pixel pointer offset
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super().__init__(writer, row, col, height, width, fgcolor, bgcolor, bdcolor)
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self.fontcolor = fontcolor if fontcolor is not None else self.fgcolor
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self.x0 = col + 2
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self.x1 = col + self.width - 2
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self.y0 = row + 2
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self.y1 = row + self.height - 2
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self.ptrcolor = pointercolor if pointercolor is not None else self.fgcolor
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# Define tick dimensions
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ytop = self.y0 + text_ht + 2 # Top of scale graphic (2 pixel gap)
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ycl = ytop + (self.y1 - ytop) // 2 # Centre line
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self.sdl = round(ctrl_ht * 1 / 3) # Length of small tick.
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self.sdy0 = ycl - self.sdl // 2
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self.mdl = round(ctrl_ht * 2 / 3) # Medium tick
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self.mdy0 = ycl - self.mdl // 2
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self.ldl = ctrl_ht # Large tick
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self.ldy0 = ycl - self.ldl // 2
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def show(self):
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wri = self.writer
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dev = self.device
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x0: int = self.x0 # Internal rectangle occupied by scale and text
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x1: int = self.x1
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y0: int = self.y0
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y1: int = self.y1
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dev.fill_rect(x0, y0, x1 - x0, y1 - y0, self.bgcolor)
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super().show()
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# Scale is drawn using ints. Each division is 10 units.
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val: int = self._value # 0..ticks*10
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# iv increments for each tick. Its value modulo N determines tick length
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iv: int # val / 10 at a tick position
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d: int # val % 10: offset relative to a tick position
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fx: int # X offset of current tick in value units
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if val >= 100: # Whole LHS of scale will be drawn
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iv, d = divmod(val - 100, 10) # Initial value
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fx = 10 - d
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iv += 1
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else: # Scale will scroll right
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iv = 0
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fx = 100 - val
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# Window shows 20 divisions, each of which corresponds to 10 units of value.
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# So pixels per unit value == win_width/200
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win_width: int = x1 - x0
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ticks: int = self.ticks # Total # of ticks visible and hidden
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while True:
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x: int = x0 + (fx * win_width) // 200 # Current X position
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ys: int # Start Y position for tick
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yl: int # tick length
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if x > x1 or iv > ticks: # Out of space or data (scroll left)
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break
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if not iv % 10:
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txt = self.legendcb(self._fvalue(iv * 10))
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tlen = wri.stringlen(txt)
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Writer.set_textpos(dev, y0, min(x, x1 - tlen))
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wri.setcolor(self.fontcolor, self.bgcolor)
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wri.printstring(txt)
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wri.setcolor()
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ys = self.ldy0 # Large tick
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yl = self.ldl
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elif not iv % 5:
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ys = self.mdy0
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yl = self.mdl
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else:
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ys = self.sdy0
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yl = self.sdl
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if self.tickcb is None:
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color = self.fgcolor
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else:
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color = self.tickcb(self._fvalue(iv * 10), self.fgcolor)
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dev.vline(x, ys, yl, color) # Draw tick
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fx += 10
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iv += 1
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dev.vline(x0 + (x1 - x0) // 2, y0, y1 - y0, self.ptrcolor) # Draw pointer
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def _to_int(self, v):
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return round((v + 1.0) * self.ticks * 5) # 0..self.ticks*10
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def _fvalue(self, v=None):
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return v / (5 * self.ticks) - 1.0
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def value(self, val=None): # User method to get or set value
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if val is not None:
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val = min(max(val, - 1.0), 1.0)
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v = self._to_int(val)
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if v != self._value:
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self._value = v
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self.show()
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return self._fvalue(self._value)
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126
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/textbox.py
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126
lib/Pico_ePaper_Code/pythonNanoGui/gui/widgets/textbox.py
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# textbox.py Extension to nanogui providing the Textbox class
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2020 Peter Hinch
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# Usage:
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# from gui.widgets.textbox import Textbox
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from gui.core.nanogui import DObject
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from gui.core.writer import Writer
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# Reason for no tab support in private/reason_for_no_tabs
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class Textbox(DObject):
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def __init__(self, writer, row, col, width, nlines, *, bdcolor=None, fgcolor=None,
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bgcolor=None, clip=True):
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height = nlines * writer.height
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||||
devht = writer.device.height
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devwd = writer.device.width
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if ((row + height + 2) > devht) or ((col + width + 2) > devwd):
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raise ValueError('Textbox extends beyond physical screen.')
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super().__init__(writer, row, col, height, width, fgcolor, bgcolor, bdcolor)
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self.nlines = nlines
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self.clip = clip
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self.lines = []
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self.start = 0 # Start line for display
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def _add_lines(self, s):
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width = self.width
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font = self.writer.font
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n = -1 # Index into string
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newline = True
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while True:
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n += 1
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if newline:
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newline = False
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||||
ls = n # Start of line being processed
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col = 0 # Column relative to text area
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||||
if n >= len(s): # End of string
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if n > ls:
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self.lines.append(s[ls :])
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return
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||||
c = s[n] # Current char
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||||
if c == '\n':
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||||
self.lines.append(s[ls : n])
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||||
newline = True
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||||
continue # Line fits window
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||||
col += font.get_ch(c)[2] # width of current char
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||||
if col > width:
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if self.clip:
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p = s[ls :].find('\n') # end of 1st line
|
||||
if p == -1:
|
||||
self.lines.append(s[ls : n]) # clip, discard all to right
|
||||
return
|
||||
self.lines.append(s[ls : n]) # clip, discard to 1st newline
|
||||
n = p # n will move to 1st char after newline
|
||||
elif c == ' ': # Easy word wrap
|
||||
self.lines.append(s[ls : n])
|
||||
else: # Edge splits a word
|
||||
p = s.rfind(' ', ls, n + 1)
|
||||
if p >= 0: # spacechar in line: wrap at space
|
||||
assert (p > 0), 'space char in position 0'
|
||||
self.lines.append(s[ls : p])
|
||||
n = p
|
||||
else: # No spacechar: wrap at end
|
||||
self.lines.append(s[ls : n])
|
||||
n -= 1 # Don't skip current char
|
||||
newline = True
|
||||
|
||||
def _print_lines(self):
|
||||
if len(self.lines) == 0:
|
||||
return
|
||||
|
||||
dev = self.device
|
||||
wri = self.writer
|
||||
col = self.col
|
||||
row = self.row
|
||||
left = col
|
||||
ht = wri.height
|
||||
wri.setcolor(self.fgcolor, self.bgcolor)
|
||||
# Print the first (or last?) lines that fit widget's height
|
||||
#for line in self.lines[-self.nlines : ]:
|
||||
for line in self.lines[self.start : self.start + self.nlines]:
|
||||
Writer.set_textpos(dev, row, col)
|
||||
wri.printstring(line)
|
||||
row += ht
|
||||
col = left
|
||||
wri.setcolor() # Restore defaults
|
||||
|
||||
def show(self):
|
||||
dev = self.device
|
||||
super().show()
|
||||
self._print_lines()
|
||||
|
||||
def append(self, s, ntrim=None, line=None):
|
||||
self._add_lines(s)
|
||||
if ntrim is None: # Default to no. of lines that can fit
|
||||
ntrim = self.nlines
|
||||
if len(self.lines) > ntrim:
|
||||
self.lines = self.lines[-ntrim:]
|
||||
self.goto(line)
|
||||
|
||||
def scroll(self, n): # Relative scrolling
|
||||
value = len(self.lines)
|
||||
if n == 0 or value <= self.nlines: # Nothing to do
|
||||
return False
|
||||
s = self.start
|
||||
self.start = max(0, min(self.start + n, value - self.nlines))
|
||||
if s != self.start:
|
||||
self.show()
|
||||
return True
|
||||
return False
|
||||
|
||||
def value(self):
|
||||
return len(self.lines)
|
||||
|
||||
def clear(self):
|
||||
self.lines = []
|
||||
self.show()
|
||||
|
||||
def goto(self, line=None): # Absolute scrolling
|
||||
if line is None:
|
||||
self.start = max(0, len(self.lines) - self.nlines)
|
||||
else:
|
||||
self.start = max(0, min(line, len(self.lines) - self.nlines))
|
||||
self.show()
|
||||
Reference in New Issue
Block a user