drawTextList static method

dynamic drawTextList(dynamic canvas, dynamic textList, dynamic font)

Implementation

static drawTextList(canvas, textList, font) {
  if (textList == null || textList.isEmpty) {
    return;
  }
  int i = 0, il = textList.length;
  num offx = 0, offy = 0;
  for (; i < il; i++) {
    offx = 0;
    offy = 0;
    var txt = textList[i];
    var txtSize = Tools.getStrW(txt[0], font);
    //第四个是定制样式
    if (txt.length >= 4) {
      font = <String, dynamic>{...font, ...txt[3]};
      if (txt[3]['ylayout'] == 'top') {
        //操控y
        offy = txtSize['height'];
      } else if (txt[3]['ylayout'] == 'bottom') {
        //操控y
        offy = -txtSize['height'];
      } else if (txt[3]['ylayout'] == 'center') {
        //操控y
        offy = -(txtSize['height'] * 0.5);
      }

      if (txt[3]['xlayout'] == 'left') {
        //操控y
        offx = txtSize['width'];
      } else if (txt[3]['xlayout'] == 'right') {
        //操控y
        offx = -txtSize['width'];
      } else if (txt[3]['xlayout'] == 'center') {
        //操控y
        offx = -(txtSize['width'] * 0.5);
      }
    }
    //绘制文字
    Tools.drawText(canvas, txt[0].toString(), font, {
      'x': txt[1] + offx,
      'y': txt[2] + offy,
      'w': txtSize['width'],
      'h': txtSize['height']
    });
  }
}