/**
* Calculates the current legend size.
*
* @param renderer the renderer
* @param defaultHeight the default height
* @param extraHeight the added extra height
* @return the legend size
*/
protected int getLegendSize(DefaultRenderer renderer, int defaultHeight, float extraHeight) {
int legendSize = renderer.getLegendHeight();
if (renderer.isShowLegend() && legendSize == 0) {
legendSize = defaultHeight;
}
if (!renderer.isShowLegend() && renderer.isShowLabels()) {
legendSize = (int) (renderer.getLabelsTextSize() * 4 / 3 + extraHeight);
}
return legendSize;
}
/**
* Draws the chart legend.
*
* @param canvas the canvas to paint to
* @param renderer the series renderer
* @param titles the titles to go to the legend
* @param left the left X value of the area to draw to
* @param right the right X value of the area to draw to
* @param y the y value of the area to draw to
* @param width the width of the area to draw to
* @param height the height of the area to draw to
* @param legendSize the legend size
* @param paint the paint to be used for drawing
* @param calculate if only calculating the legend size
* @return the legend height
*/
protected int drawLegend(
Canvas canvas,
DefaultRenderer renderer,
String[] titles,
int left,
int right,
int y,
int width,
int height,
int legendSize,
Paint paint,
boolean calculate) {
float size = 32;
if (renderer.isShowLegend()) {
float currentX = left;
float currentY = y + height - legendSize + size;
paint.setTextAlign(Align.LEFT);
paint.setTextSize(renderer.getLegendTextSize());
int sLength = Math.min(titles.length, renderer.getSeriesRendererCount());
for (int i = 0; i < sLength; i++) {
final float lineSize = getLegendShapeWidth(i);
String text = titles[i];
if (titles.length == renderer.getSeriesRendererCount()) {
paint.setColor(renderer.getSeriesRendererAt(i).getColor());
} else {
paint.setColor(Color.LTGRAY);
}
float[] widths = new float[text.length()];
paint.getTextWidths(text, widths);
float sum = 0;
for (float value : widths) {
sum += value;
}
float extraSize = lineSize + 10 + sum;
float currentWidth = currentX + extraSize;
if (i > 0 && getExceed(currentWidth, renderer, right, width)) {
currentX = left;
currentY += renderer.getLegendTextSize();
size += renderer.getLegendTextSize();
currentWidth = currentX + extraSize;
}
if (getExceed(currentWidth, renderer, right, width)) {
float maxWidth = right - currentX - lineSize - 10;
if (isVertical(renderer)) {
maxWidth = width - currentX - lineSize - 10;
}
int nr = paint.breakText(text, true, maxWidth, widths);
text = text.substring(0, nr) + "...";
}
if (!calculate) {
drawLegendShape(canvas, renderer.getSeriesRendererAt(i), currentX, currentY, i, paint);
drawString(canvas, text, currentX + lineSize + 5, currentY + 5, paint);
}
currentX += extraSize;
}
}
return Math.round(size + renderer.getLegendTextSize());
}