private void drawLegend(Context2D context) {
if (legend != null && drawLegend) {
legend.setContext(context);
double tX = 0;
double tY = 0;
double offsetTop = calculateOffsetCausedByTitleAndSubtitle(context);
Legend.LegendPosition position = legend.getPosition();
if (position.equals(Legend.LegendPosition.LEGEND_POSITION_LEFT)) {
tX = paddingLeft;
tY = offsetTop;
} else if (position.equals(Legend.LegendPosition.LEGEND_POSITION_RIGHT)) {
tX = width - paddingRight - legend.getWidth();
tY = offsetTop;
} else if (position.equals(Legend.LegendPosition.LEGEND_POSITION_TOP)) {
tX = paddingLeft;
tY = offsetTop;
} else if (position.equals(Legend.LegendPosition.LEGEND_POSITION_BOTTOM)) {
tX = paddingLeft;
tY = height - paddingBottom - legend.getHeight();
}
context.save();
context.translate(tX, tY);
legend.draw();
context.restore();
}
}
private void drawOuterBorder(
Context2D context, Paint borderPaint, BasicStroke borderStroke, double width, double height) {
float borderWidth = borderStroke.getLineWidth();
context.setStroke(borderStroke);
context.setPaint(borderPaint);
context.draw(
new Rectangle2D.Double(
borderWidth / 2, borderWidth / 2, width - borderWidth, height - borderWidth));
}
private void drawTitleAndSubtitle(Context2D context) {
double widthWithoutPadding = width - paddingLeft - paddingRight;
context.save();
context.translate(0, paddingTop);
// Draw title:
if (title != null) {
drawCenteredText(context, title, width, titleFont, titleColor, widthWithoutPadding);
context.translate(0, context.getLineHeight(titleFont, title));
}
// Draw subtitle:
if (subtitle != null) {
context.translate(0, subtitleMargin);
drawCenteredText(context, subtitle, width, subtitleFont, subtitleColor, widthWithoutPadding);
context.translate(0, context.getLineHeight(subtitleFont, subtitle));
}
if (title != null || subtitle != null) {
context.translate(0, titleMargin);
}
context.restore();
}
private double calculateOffsetCausedByTitleAndSubtitle(Context2D context) {
double offsetTop = paddingTop;
if (title != null) {
offsetTop += context.getLineHeight(titleFont, title);
}
if (subtitle != null) {
offsetTop += context.getLineHeight(subtitleFont, subtitle) + subtitleMargin;
}
if (title != null || subtitle != null) {
offsetTop += titleMargin;
}
return offsetTop;
}
private void drawCenteredText(
Context2D context,
String text,
double width,
Font textFont,
Color textColor,
double maxWidth) {
context.setFont(textFont);
context.setPaint(textColor);
context.drawText(
text,
width / 2,
0,
Context2D.HORIZONTAL_ALIGN_CENTER,
Context2D.VERTICAL_ALIGN_TOP,
maxWidth);
}
private void drawChart(Context2D context) {
if (renderer != null) {
double offsetTop = calculateOffsetCausedByTitleAndSubtitle(context);
double chartWidth = width - paddingLeft - paddingRight;
double chartHeight = height - offsetTop - paddingBottom;
context.save();
context.translate(paddingLeft, offsetTop);
if (drawLegend && legend != null) {
Legend.LegendPosition position = legend.getPosition();
if (position.equals(Legend.LegendPosition.LEGEND_POSITION_LEFT)
|| position.equals(Legend.LegendPosition.LEGEND_POSITION_RIGHT)) {
chartWidth -= legend.getWidth() + legendMargin;
if (position.equals(Legend.LegendPosition.LEGEND_POSITION_LEFT)) {
context.translate(legend.getWidth() + legendMargin, 0);
}
} else {
chartHeight -= legend.getHeight() + legendMargin;
if (position.equals(Legend.LegendPosition.LEGEND_POSITION_TOP)) {
context.translate(0, legend.getHeight() + legendMargin);
}
}
}
context.resize(chartWidth, chartHeight);
renderer.draw(context, dataseries, labels);
context.restore();
}
}
private void fillBackground(
Context2D context, Paint backgroundPaint, double width, double height) {
context.setPaint(backgroundPaint);
context.fill(new Rectangle2D.Double(0, 0, width, height));
}