drawChart method

@override void drawChart(Canvas canvas, Size size)

Implementation

@override
void drawChart(Canvas canvas, Size size) {
  canvas.save();
  canvas.translate(mTranslateX * scaleX, 0.0);
  canvas.scale(scaleX, 1.0);
  for (int i = mStartIndex; datas != null && i <= mStopIndex; i++) {
    KLineEntity? curPoint = datas?[i];
    if (curPoint == null) continue;
    KLineEntity lastPoint = i == 0 ? curPoint : datas![i - 1];
    double curX = getX(i);
    double lastX = i == 0 ? curX : getX(i - 1);

    mMainRenderer.drawChart(lastPoint, curPoint, lastX, curX, size, canvas);
    mVolRenderer?.drawChart(lastPoint, curPoint, lastX, curX, size, canvas);
    mSecondaryRenderer?.drawChart(
        lastPoint, curPoint, lastX, curX, size, canvas);
  }

  if ((isLongPress == true || (isTapShowInfoDialog && isOnTap)) &&
      isTrendLine == false) {
    drawCrossLine(canvas, size);
  }
  if (isTrendLine == true) drawTrendLines(canvas, size);
  canvas.restore();

  // 在恢复canvas状态后绘制绘图工具，避免受到缩放和平移影响
  if (drawingToolManager != null) {
    // 创建正确的坐标转换函数
    double getXForDrawing(double x) {
      // x 应该是屏幕坐标，直接返回
      return x;
    }

    double getYForDrawing(double y) {
      // y 是屏幕坐标，直接返回
      return y;
    }

    debugPrint('ChartPainter.drawChart: 开始绘制绘图工具');
    drawingToolManager!
        .drawTools(canvas, size, 1.0, 0.0, getXForDrawing, getYForDrawing);
  }
}