printer.py 文件源码

def compute_metrics(self):
        self.font_metrics = QtGui.QFontMetrics(self.font)
        cat = max([self.font_metrics.width(c) for c in digits+uppercase])*4 + self.font_metrics.width('    ')
        name = max([self.font_metrics.width(c) for c in self.chars])*16 + self.spacing
        self.prog_size = cat+name