/**
* The graphical representation of the legend shape.
*
* @param canvas the canvas to paint to
* @param renderer the series renderer
* @param x the x value of the point the shape should be drawn at
* @param y the y value of the point the shape should be drawn at
* @param seriesIndex the series index
* @param paint the paint to be used for drawing
*/
public void drawLegendShape(
Canvas canvas,
SimpleSeriesRenderer renderer,
float x,
float y,
int seriesIndex,
Paint paint) {
canvas.drawLine(x, y, x + SHAPE_WIDTH, y, paint);
if (isRenderPoints(renderer)) {
pointsChart.drawLegendShape(canvas, renderer, x + 5, y, seriesIndex, paint);
}
}
/**
* The graphical representation of a series.
*
* @param canvas the canvas to paint to
* @param paint the paint to be used for drawing
* @param points the array of points to be used for drawing the series
* @param seriesRenderer the series renderer
* @param yAxisValue the minimum value of the y axis
* @param seriesIndex the index of the series currently being drawn
* @param startIndex the start index of the rendering points
*/
@Override
public void drawSeries(
Canvas canvas,
Paint paint,
List<Float> points,
XYSeriesRenderer renderer,
float yAxisValue,
int seriesIndex,
int startIndex) {
float lineWidth = paint.getStrokeWidth();
paint.setStrokeWidth(renderer.getLineWidth());
final FillOutsideLine[] fillOutsideLine = renderer.getFillOutsideLine();
for (FillOutsideLine fill : fillOutsideLine) {
if (fill.getType() != FillOutsideLine.Type.NONE) {
paint.setColor(fill.getColor());
// TODO: find a way to do area charts without duplicating data
List<Float> fillPoints = new ArrayList<Float>();
int[] range = fill.getFillRange();
if (range == null) {
fillPoints.addAll(points);
} else {
if (points.size() > range[0] * 2 && points.size() > range[1] * 2) {
fillPoints.addAll(points.subList(range[0] * 2, range[1] * 2));
}
}
final float referencePoint;
switch (fill.getType()) {
case BOUNDS_ALL:
referencePoint = yAxisValue;
break;
case BOUNDS_BELOW:
referencePoint = yAxisValue;
break;
case BOUNDS_ABOVE:
referencePoint = yAxisValue;
break;
case BELOW:
referencePoint = canvas.getHeight();
break;
case ABOVE:
referencePoint = 0;
break;
default:
throw new RuntimeException(
"You have added a new type of filling but have not implemented.");
}
if (fill.getType() == FillOutsideLine.Type.BOUNDS_ABOVE
|| fill.getType() == FillOutsideLine.Type.BOUNDS_BELOW) {
List<Float> boundsPoints = new ArrayList<Float>();
boolean add = false;
int length = fillPoints.size();
if (length > 0
&& fill.getType() == FillOutsideLine.Type.BOUNDS_ABOVE
&& fillPoints.get(1) < referencePoint
|| fill.getType() == FillOutsideLine.Type.BOUNDS_BELOW
&& fillPoints.get(1) > referencePoint) {
boundsPoints.add(fillPoints.get(0));
boundsPoints.add(fillPoints.get(1));
add = true;
}
for (int i = 3; i < length; i += 2) {
float prevValue = fillPoints.get(i - 2);
float value = fillPoints.get(i);
if (prevValue < referencePoint && value > referencePoint
|| prevValue > referencePoint && value < referencePoint) {
float prevX = fillPoints.get(i - 3);
float x = fillPoints.get(i - 1);
boundsPoints.add(
prevX + (x - prevX) * (referencePoint - prevValue) / (value - prevValue));
boundsPoints.add(referencePoint);
if (fill.getType() == FillOutsideLine.Type.BOUNDS_ABOVE && value > referencePoint
|| fill.getType() == FillOutsideLine.Type.BOUNDS_BELOW
&& value < referencePoint) {
i += 2;
add = false;
} else {
boundsPoints.add(x);
boundsPoints.add(value);
add = true;
}
} else {
if (add
|| fill.getType() == FillOutsideLine.Type.BOUNDS_ABOVE && value < referencePoint
|| fill.getType() == FillOutsideLine.Type.BOUNDS_BELOW
&& value > referencePoint) {
boundsPoints.add(fillPoints.get(i - 1));
boundsPoints.add(value);
}
}
}
fillPoints.clear();
fillPoints.addAll(boundsPoints);
}
int length = fillPoints.size();
if (length > 0) {
fillPoints.set(0, fillPoints.get(0) + 1);
fillPoints.add(fillPoints.get(length - 2));
fillPoints.add(referencePoint);
fillPoints.add(fillPoints.get(0));
fillPoints.add(fillPoints.get(length + 1));
for (int i = 0; i < length + 4; i += 2) {
if (fillPoints.get(i + 1) < 0) {
fillPoints.set(i + 1, 0f);
}
}
paint.setStyle(Style.FILL);
drawPath(canvas, fillPoints, paint, true);
}
}
}
paint.setColor(renderer.getColor());
paint.setStyle(Style.STROKE);
drawPath(canvas, points, paint, false);
paint.setStrokeWidth(lineWidth);
}