64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
from PIL import ImageFont
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from barcode.writer import ImageWriter, mm2px
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from brother_ql.devicedependent import label_type_specs
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def px2mm(px, dpi=300):
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return (25.4 * px)/dpi
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class BrotherLabelWriter(ImageWriter):
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def __init__(self, typ='62', max_height=350, rot=False, text=None):
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super(BrotherLabelWriter, self).__init__()
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assert typ in label_type_specs
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self.rot = rot
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if self.rot:
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self._h, self._w = label_type_specs[typ]['dots_printable']
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if self._w == 0 or self._w > max_height:
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self._w = max_height
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else:
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self._w, self._h = label_type_specs[typ]['dots_printable']
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if self._h == 0 or self._h > max_height:
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self._h = max_height
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self._xo = 0.0
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self._yo = 0.0
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self._title = text
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def _init(self, code):
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self.text = None
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super(BrotherLabelWriter, self)._init(code)
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def calculate_size(self, modules_per_line, number_of_lines, dpi=300):
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x, y = super(BrotherLabelWriter, self).calculate_size(modules_per_line, number_of_lines, dpi)
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self._xo = (px2mm(self._w)-px2mm(x))/2
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self._yo = (px2mm(self._h)-px2mm(y))
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assert self._xo >= 0
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assert self._yo >= 0
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return int(self._w), int(self._h)
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def _paint_module(self, xpos, ypos, width, color):
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super(BrotherLabelWriter, self)._paint_module(xpos+self._xo, ypos+self._yo, width, color)
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def _paint_text(self, xpos, ypos):
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super(BrotherLabelWriter, self)._paint_text(xpos+self._xo, ypos+self._yo)
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def _finish(self):
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if self._title:
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width = self._w+1
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height = 0
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max_h = self._h - mm2px(self._yo, self.dpi)
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fs = int(max_h / 1.2)
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font = ImageFont.truetype("./arial.ttf", 10)
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while width > self._w or height > max_h:
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font = ImageFont.truetype("./Stranger back in the Night.ttf", fs)
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width, height = font.getsize(self._title)
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fs -= 1
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pos = (
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(self._w-width)//2,
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0 - (height // 8)
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)
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self._draw.text(pos, self._title, font=font, fill=self.foreground)
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return self._image
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