kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
64 wiersze
2.4 KiB
Python
64 wiersze
2.4 KiB
Python
# label.py Extension to micro-gui providing the Label class
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2021 Peter Hinch
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from gui.core.ugui import Widget, display
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from gui.core.writer import Writer
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from gui.core.colors import *
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# text: str display string int save width
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class Label(Widget):
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LEFT = 0
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CENTRE = 1
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RIGHT = 2
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def __init__(self, writer, row, col, text, invert=False, fgcolor=None, bgcolor=BLACK, bdcolor=False, justify=0):
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self.writer = writer
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self.justify = justify
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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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self.invert = invert
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super().__init__(writer, row, col, height, width, fgcolor, bgcolor, bdcolor)
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self.tcol = col
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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, justify=None):
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sl = self.writer.stringlen(text)
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if justify is None:
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justify = self.justify
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self.tcol = self.col # Default is left justify
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if sl > self.width: # Clip
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font = self.writer.font
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pos = 0
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n = 0
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for ch in text:
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pos += font.get_ch(ch)[2] # width of current char
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if pos > self.width:
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break
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n += 1
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text = text[: n]
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elif justify == 1: # Centre
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self.tcol = self.col + (self.width - sl) // 2
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elif justify == 2: # Right
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self.tcol = self.col + self.width - sl
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txt = super().value(text)
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self.draw = True # Redraw unconditionally: 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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return txt
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def show(self):
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if super().show(): # Draw or erase border
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if isinstance(txt := super().value(), str):
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display.print_left(self.writer, self.tcol, self.row, txt, self.fgcolor, self.bgcolor, self.invert)
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