/**
* Estimates the maximum tick label height.
*
* @param g2 the graphics device.
*
* @return The maximum height.
*/
/**
* Estimates the maximum tick label height.
*
* @param g2 the graphics device.
*
* @return The maximum height.
*
* @since 1.0.7
*/
protected double estimateMaximumTickLabelHeight(Graphics2D g2) {
RectangleInsets tickLabelInsets = getTickLabelInsets();
double result = tickLabelInsets.getTop() + tickLabelInsets.getBottom();
Font tickLabelFont = getTickLabelFont();
FontRenderContext frc = g2.getFontRenderContext();
result += tickLabelFont.getLineMetrics("123", frc).getHeight();
return result;
}
/**
* Estimates the maximum width of the tick labels, assuming the specified
* tick unit is used.
* <P>
* Rather than computing the string bounds of every tick on the axis, we
* just look at two values: the lower bound and the upper bound for the
* axis. These two values will usually be representative.
*
* @param g2 the graphics device.
* @param unit the tick unit to use for calculation.
*
* @return The estimated maximum width of the tick labels.
*/
/**
* Estimates the maximum width of the tick labels, assuming the specified
* tick unit is used.
* <P>
* Rather than computing the string bounds of every tick on the axis, we
* just look at two values: the lower bound and the upper bound for the
* axis. These two values will usually be representative.
*
* @param g2 the graphics device.
* @param unit the tick unit to use for calculation.
*
* @return The estimated maximum width of the tick labels.
*
* @since 1.0.7
*/
protected double estimateMaximumTickLabelWidth(Graphics2D g2, TickUnit unit) {
RectangleInsets tickLabelInsets = getTickLabelInsets();
double result = tickLabelInsets.getLeft() + tickLabelInsets.getRight();
if (isVerticalTickLabels()) {
// all tick labels have the same width (equal to the height of the
// all tick labels have the same width (equal to the height of the
// font)...
FontRenderContext frc = g2.getFontRenderContext();
LineMetrics lm = getTickLabelFont().getLineMetrics("0", frc);
result += lm.getHeight();
}
else {
// look at lower and upper bounds...
FontMetrics fm = g2.getFontMetrics(getTickLabelFont());
Range range = getRange();
double lower = range.getLowerBound();
double upper = range.getUpperBound();
String lowerStr = "";
String upperStr = "";
NumberFormat formatter = getNumberFormatOverride();
if (formatter != null) {
lowerStr = formatter.format(lower);
upperStr = formatter.format(upper);
}
else {
lowerStr = unit.valueToString(lower);
upperStr = unit.valueToString(upper);
}
double w1 = fm.stringWidth(lowerStr);
double w2 = fm.stringWidth(upperStr);
result += Math.max(w1, w2);
}
return result;
}
|