drawText method

@override dynamic drawText(String? text, PrinterOffset offset, PrinterSize size, PrinterTextStyle textStyle,)

打印文字

text 内容

offset 偏移位置

size 大小

textStyle 文字样式

Implementation

@override
drawText(String? text, PrinterOffset offset, PrinterSize size, PrinterTextStyle textStyle) {
  textStyle = textStyle.extendsStyle(this.config!.fontStyle!);

  var fontHeight = getFontHeight(textStyle);
  var height = fontHeight.toDouble() * (textStyle.lineHeight ?? 1);

  if (text == null || text.trim().isEmpty) {
    return offset.y! + height;
  }

  setFontBlod(textStyle.fontBlod ?? false);
  setUnderline(textStyle.underline ?? false);
  setFontSize(textStyle.fontSize ?? 1);

  var textLeft = this.calcTextLeft(text, size.width!.toInt(), textStyle.align!,
      textStyle);
  if (textLeft < 0) {
    text = splitLine(
        text, size.width!.toInt(), textStyle)[0];
    textLeft = this.calcTextLeft(text, size.width!.toInt(), textStyle.align!,
        textStyle);
  }
  var x = offset.x! + textLeft;
  var y = offset.y! + (height - fontHeight) ~/ 2;

  if (text.trim().isNotEmpty) {
    this.addCommand(
        "T ${textStyle.fontType} 0 ${x.toInt()} ${y.toInt()} $text");
  }
}