private CustomLegendItem createValueSourceLegendItem(
PlotConfiguration plotConfig, ValueSource valueSource) {
Set<PlotDimension> dimensions = new HashSet<PlotDimension>();
for (PlotDimension dimension : PlotDimension.values()) {
switch (dimension) {
case DOMAIN:
case VALUE:
break;
default:
if (valueSource.useSeriesFormatForDimension(plotConfig, dimension)) {
dimensions.add(dimension);
}
}
}
if (dimensions.isEmpty()) {
return null;
}
SeriesFormat format = valueSource.getSeriesFormat();
String description = "";
String toolTipText = "";
String urlText = "";
boolean shapeVisible = true;
Shape shape;
boolean shapeFilled = true;
Paint fillPaint = UNDEFINED_COLOR_PAINT;
boolean shapeOutlineVisible = true;
Paint outlinePaint = PlotConfiguration.DEFAULT_OUTLINE_COLOR;
Stroke outlineStroke = DEFAULT_OUTLINE_STROKE;
boolean lineVisible =
format.getLineStyle() != LineStyle.NONE
&& format.getSeriesType() == SeriesFormat.VisualizationType.LINES_AND_SHAPES;
// configure fill paint and line paint
Paint linePaint;
String label = valueSource.toString();
if (label == null) {
label = "";
}
if (dimensions.contains(PlotDimension.COLOR)) {
Color color = format.getItemColor();
fillPaint = format.getAreaFillPaint(color);
linePaint = fillPaint;
} else {
if (format.getAreaFillStyle() == FillStyle.NONE) {
fillPaint = new Color(0, 0, 0, 0);
linePaint = fillPaint;
} else if (format.getAreaFillStyle() == FillStyle.SOLID) {
fillPaint = UNDEFINED_COLOR_PAINT;
linePaint = UNDEFINED_LINE_COLOR;
} else {
fillPaint = format.getAreaFillPaint(UNDEFINED_COLOR);
linePaint = fillPaint;
}
}
VisualizationType seriesType = valueSource.getSeriesFormat().getSeriesType();
if (seriesType == VisualizationType.LINES_AND_SHAPES) {
if (dimensions.contains(PlotDimension.SHAPE)) {
shape = format.getItemShape().getShape();
} else if (dimensions.contains(PlotDimension.COLOR)) {
shape = UNDEFINED_SHAPE;
} else {
shape = UNDEFINED_SHAPE_AND_COLOR;
}
if (dimensions.contains(PlotDimension.SIZE)) {
AffineTransform transformation = new AffineTransform();
double scalingFactor = format.getItemSize();
transformation.scale(scalingFactor, scalingFactor);
shape = transformation.createTransformedShape(shape);
}
} else if (seriesType == VisualizationType.BARS) {
shape = BAR_SHAPE;
} else if (seriesType == VisualizationType.AREA) {
shape = AREA_SHAPE;
} else {
throw new RuntimeException("Unknown SeriesType. This should not happen.");
}
// configure line shape
float lineLength = 0;
if (lineVisible) {
lineLength = format.getLineWidth();
if (lineLength < 1) {
lineLength = 1;
}
if (lineLength > 1) {
lineLength = 1 + (float) Math.log(lineLength) / 2;
}
// line at least 30 pixels long, and show at least 2 iterations of stroke
lineLength = Math.max(lineLength * 30, format.getStrokeLength() * 2);
// line at least 2x longer than shape width
if (shape != null) {
lineLength = Math.max(lineLength, (float) shape.getBounds().getWidth() * 2f);
}
}
// now create line shape and stroke
Shape line = new Line2D.Float(0, 0, lineLength, 0);
BasicStroke lineStroke = format.getStroke();
if (lineStroke == null) {
lineStroke = new BasicStroke();
}
// unset line ending decoration to prevent drawing errors in legend
{
BasicStroke s = lineStroke;
lineStroke =
new BasicStroke(
s.getLineWidth(),
BasicStroke.CAP_BUTT,
BasicStroke.JOIN_ROUND,
s.getMiterLimit(),
s.getDashArray(),
s.getDashPhase());
}
return new CustomLegendItem(
label,
description,
toolTipText,
urlText,
shapeVisible,
shape,
shapeFilled,
fillPaint,
shapeOutlineVisible,
outlinePaint,
outlineStroke,
lineVisible,
line,
lineStroke,
linePaint);
}
