kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
62 wiersze
2.2 KiB
Python
62 wiersze
2.2 KiB
Python
# 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 micropython import const
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from gui.core.nanogui import DObject
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from gui.core.writer import Writer
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ALIGN_LEFT = const(0)
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ALIGN_RIGHT = const(1)
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ALIGN_CENTER = const(2)
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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, align=ALIGN_LEFT):
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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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self.align = align
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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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if self.align == ALIGN_LEFT:
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Writer.set_textpos(dev, self.row, self.col)
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else:
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txt_width = wri.stringlen(txt)
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if self.width <= txt_width:
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Writer.set_textpos(dev, self.row, self.col)
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else:
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if self.align == ALIGN_RIGHT:
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Writer.set_textpos(dev, self.row, self.col + self.width - txt_width)
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else:
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Writer.set_textpos(dev, self.row, self.col + self.width // 2 - txt_width // 2)
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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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