/// <summary>
/// draws the x-labels on the specified y-position
/// </summary>
protected virtual void DrawLabels(SKCanvas c, float pos, SKPoint anchor)
{
float labelRotationAngleDegrees = XAxis.LabelRotationAngle;
var centeringEnabled = XAxis.IsCenterAxisLabelsEnabled;
SKPoint[] positions = new SKPoint[XAxis.entryCount];
for (int i = 0; i < positions.Length; i++)
{
// only fill x values
if (centeringEnabled)
{
positions[i].X = XAxis.centeredEntries[i];
}
else
{
positions[i].X = XAxis.entries[i];
}
}
positions = Trasformer.PointValuesToPixel(positions);
for (int i = 0; i < positions.Length; i++)
{
float x = positions[i].X;
if (ViewPortHandler.IsInBoundsX(x))
{
var label = XAxis.ValueFormatter.GetFormattedValue(XAxis.entries[i], XAxis);
if (XAxis.AvoidFirstLastClipping)
{
// avoid clipping of the last
if (i == XAxis.entryCount - 1 && XAxis.entryCount > 1)
{
float width = AxisLabelPaint.MeasureWidth(label);
if (width > ViewPortHandler.OffsetRight * 2 &&
x + width > ViewPortHandler.ChartWidth)
{
x -= width / 2;
}
// avoid clipping of the first
}
else if (i == 0)
{
float width = AxisLabelPaint.MeasureWidth(label);
x += width / 2;
}
}
DrawLabel(c, label, x, pos, anchor, labelRotationAngleDegrees);
}
}
}
/// <summary>
/// draws the y-axis labels to the screen
/// </summary>
public virtual void RenderAxisLabels(SKCanvas c)
{
if (!YAxis.IsEnabled || !YAxis.IsDrawLabelsEnabled)
{
return;
}
SKPoint[] positions = GetTransformedPositions();
AxisLabelPaint.Typeface = YAxis.Typeface;
AxisLabelPaint.TextSize = YAxis.TextSize;
AxisLabelPaint.Color = YAxis.TextColor;
float xoffset = YAxis.XOffset;
float yoffset = AxisLabelPaint.MeasureHeight("A") / 2.5f + YAxis.YOffset;
YAxisDependency dependency = YAxis.AxisDependency;
YAxis.YAxisLabelPosition labelPosition = YAxis.Position;
float xPos;
if (dependency == YAxisDependency.Left)
{
if (labelPosition == YAxis.YAxisLabelPosition.OutSideChart)
{
AxisLabelPaint.TextAlign = SKTextAlign.Right;
xPos = ViewPortHandler.OffsetLeft - xoffset;
}
else
{
AxisLabelPaint.TextAlign = SKTextAlign.Left;
xPos = ViewPortHandler.OffsetLeft + xoffset;
}
}
else
{
if (labelPosition == YAxis.YAxisLabelPosition.OutSideChart)
{
AxisLabelPaint.TextAlign = SKTextAlign.Left;
xPos = ViewPortHandler.ContentRight + xoffset;
}
else
{
AxisLabelPaint.TextAlign = SKTextAlign.Right;
xPos = ViewPortHandler.ContentRight - xoffset;
}
}
DrawYLabels(c, xPos, positions, yoffset);
}
public override void RenderAxisLabels(SKCanvas c)
{
if (!YAxis.IsEnabled || !YAxis.IsDrawLabelsEnabled)
{
return;
}
SKPoint[] positions = GetTransformedPositions();
AxisLabelPaint.Typeface = YAxis.Typeface;
AxisLabelPaint.TextSize = YAxis.TextSize;
AxisLabelPaint.Color = YAxis.TextColor;
AxisLabelPaint.TextAlign = SKTextAlign.Center;
float baseYOffset = 2.5f.DpToPixel();
float textHeight = AxisLabelPaint.MeasureHeight("Q");
YAxisDependency dependency = YAxis.AxisDependency;
YAxis.YAxisLabelPosition labelPosition = YAxis.Position;
float yPos;
if (dependency == YAxisDependency.Left)
{
if (labelPosition == YAxis.YAxisLabelPosition.OutSideChart)
{
yPos = ViewPortHandler.ContentTop - baseYOffset;
}
else
{
yPos = ViewPortHandler.ContentTop - baseYOffset;
}
}
else
{
if (labelPosition == YAxis.YAxisLabelPosition.OutSideChart)
{
yPos = ViewPortHandler.ContentBottom + textHeight + baseYOffset;
}
else
{
yPos = ViewPortHandler.ContentBottom + textHeight + baseYOffset;
}
}
DrawYLabels(c, yPos, positions, YAxis.YOffset);
}
protected virtual void ComputeSize()
{
var longest = XAxis.GetLongestLabel();
AxisLabelPaint.Typeface = XAxis.Typeface;
AxisLabelPaint.TextSize = XAxis.TextSize;
var labelSize = AxisLabelPaint.Measure(longest);
float labelWidth = labelSize.Width;
float labelHeight = AxisLabelPaint.MeasureHeight("Q");
var labelRotatedSize = ChartUtil.GetSizeOfRotatedRectangleByDegrees(
labelWidth,
labelHeight,
XAxis.LabelRotationAngle);
XAxis.LabelWidth = (int)Math.Round(labelWidth);
XAxis.LabelHeight = (int)Math.Round(labelHeight);
XAxis.LabelRotatedWidth = (int)MathF.Round(labelRotatedSize.Width);
XAxis.LabelRotatedHeight = (int)MathF.Round(labelRotatedSize.Height);
}
