private bool UpdateScales()
{
var valueScale = ValueScale;
var categoryScale = CategoryScale;
CategoryScale = new LinearScale {
Output = CategoryScale.Output
};
ValueScale = new LinearScale {
Output = ValueScale.Output
};
var visibleSeries = Series.Where(series => series.Visible).ToList();
var invisibleSeries = Series.Where(series => series.Visible == false).ToList();
if (!visibleSeries.Any() && invisibleSeries.Any())
{
visibleSeries.Add(invisibleSeries.Last());
}
foreach (var series in visibleSeries)
{
CategoryScale = series.TransformCategoryScale(CategoryScale);
ValueScale = series.TransformValueScale(ValueScale);
}
AxisBase xAxis = CategoryAxis;
AxisBase yAxis = ValueAxis;
if (ShouldInvertAxes())
{
xAxis = ValueAxis;
yAxis = CategoryAxis;
}
else
{
CategoryScale.Padding = CategoryAxis.Padding;
}
CategoryScale.Resize(xAxis.Min, xAxis.Max);
if (xAxis.Step != null)
{
CategoryScale.Step = xAxis.Step;
CategoryScale.Round = false;
}
ValueScale.Resize(yAxis.Min, yAxis.Max);
if (yAxis.Step != null)
{
ValueScale.Step = yAxis.Step;
ValueScale.Round = false;
}
var legendSize = Legend.Measure(this);
var valueAxisSize = ValueAxis.Measure(this);
var categoryAxisSize = CategoryAxis.Measure(this);
if (!ShouldRenderAxes())
{
valueAxisSize = categoryAxisSize = 0;
}
MarginTop = MarginRight = 32;
MarginLeft = valueAxisSize;
MarginBottom = Math.Max(32, categoryAxisSize);
if (Legend.Visible)
{
if (Legend.Position == LegendPosition.Right || Legend.Position == LegendPosition.Left)
{
if (Legend.Position == LegendPosition.Right)
{
MarginRight = legendSize + 16;
}
else
{
MarginLeft = legendSize + 16 + valueAxisSize;
}
}
else if (Legend.Position == LegendPosition.Top || Legend.Position == LegendPosition.Bottom)
{
if (Legend.Position == LegendPosition.Top)
{
MarginTop = legendSize + 16;
}
else
{
MarginBottom = legendSize + 16 + categoryAxisSize;
}
}
}
CategoryScale.Output = new ScaleRange {
Start = MarginLeft, End = Width.Value - MarginRight
};
ValueScale.Output = new ScaleRange {
Start = Height.Value - MarginBottom, End = MarginTop
};
ValueScale.Fit(ValueAxis.TickDistance);
CategoryScale.Fit(CategoryAxis.TickDistance);
var stateHasChanged = false;
if (!ValueScale.IsEqualTo(valueScale))
{
stateHasChanged = true;
}
if (!CategoryScale.IsEqualTo(categoryScale))
{
stateHasChanged = true;
}
return(stateHasChanged);
}
