// 如果上一次的视图和当前XY轴范围不匹配则取消缩放视图
private void CancelScaleViewIfRangeNotFit(double lastMaxX, double lastMinX, double lastMaxY, double lastMinY)
{
if (!AxisX.IsZoomed && !AxisY.IsZoomed)
{
return;
}
double currentMaxX = AxisX.Maximum;
double currentMinX = AxisX.Minimum;
double currentMaxY = AxisY.Maximum;
double currentMinY = AxisY.Minimum;
// double viewMaxX = plotArea.AxisX.ViewMaximum;
// double viewMinX = plotArea.AxisX.ViewMinimum;
// double viewMaxY = plotArea.AxisY.ViewMaximum;
// double viewMinY = plotArea.AxisY.ViewMinimum;
// 如果没有重合区域则取消缩放
if (double.IsNaN(lastMaxX) || double.IsNaN(lastMinX) || double.IsNaN(lastMaxY) || double.IsNaN(lastMinY) ||
double.IsNaN(currentMaxX) || double.IsNaN(currentMinX) || double.IsNaN(currentMaxY) || double.IsNaN(currentMinY) ||
currentMaxX <= lastMinX || currentMinX >= lastMaxX || currentMaxY <= lastMinY || currentMinY >= lastMaxY)
{
AxisX.CancelScaleView();
AxisX2.CancelScaleView();
AxisY.CancelScaleView();
AxisY2.CancelScaleView();
}
double currentXRange = currentMaxX - currentMinX;
double currentYRange = currentMaxY - currentMinY;
double lastXRange = lastMaxX - lastMinX;
double lastYRange = lastMaxY - lastMinY;
double minXRange = currentXRange > lastXRange ? lastXRange : currentXRange;
double minYRange = currentYRange > lastYRange ? lastYRange : currentYRange;
// 如果X轴范围差比例超过最大维持系数则取消XY轴的缩放
if (Math.Abs(currentXRange - lastXRange) / minXRange > Constants.MaxDiffToKeepXScaleview)
{
AxisX.CancelScaleView();
AxisX2.CancelScaleView();
AxisY.CancelScaleView();
AxisY2.CancelScaleView();
}
// 如果Y轴范围差比例超过最大维持系数则取消Y轴的缩放
else if (Math.Abs(currentYRange - lastYRange) / minYRange > Constants.MaxDiffToKeepYScaleview)
{
AxisY.CancelScaleView();
AxisY2.CancelScaleView();
}
}
