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);
  }

  // 移除了十字线绘制，现在由base_chart_painter负责
  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) {
    debugPrint('ChartPainter.drawChart: 开始绘制绘图工具');
    // 直接绘制，因为绘图工具存储的已经是屏幕坐标
    drawingToolManager!.drawTools(
      canvas,
      size,
      1.0, // scaleX = 1.0，因为不需要额外缩放
      0.0, // scrollX = 0.0，因为不需要额外偏移
      (index) => index, // getX: 直接返回输入值（屏幕坐标）
      (price) => price, // getY: 直接返回输入值（屏幕坐标）
    );
  }
}