code: function(bar, placement) {
              var options = this.options;
              placement = placement || options.scaleValuePlacement;
              placement = placement ? placement.toLowerCase() : 'auto';
              if(placement === 'auto') {
                  placement = bar.y < 15 ? 'insdie' : 'outside';
              }
  
              var y = placement === 'insdie' ? (bar.y + 10) : (bar.y - 10);
              var ctx = this.chart.ctx;
              ctx.font = helpers.fontString(options.scaleFontSize, options.scaleFontStyle, options.scaleFontFamily);
              ctx.textBaseline = "middle";
              ctx.textAlign = "center";
              ctx.fillStyle = options.scaleFontColor;
              ctx.fillText(bar.value, bar.x, y);
          }
docs: / ZUI change begin