private void drawXAxis(Graphics g, Font font) {
if (!xAxis.isDisplayed()) return;
Color oldColor = g.getColor();
g.setColor(Color.BLACK);
float leftBorder = getLeftBorder();
int yVal = getHeight() - getNumPixelsReservedOnBottom();
g.drawLine((int) leftBorder, yVal, getWidth(), yVal);
float xInterval = (getWidth() - leftBorder) / xAxis.getNumberTicks();
FontMetrics fm = g.getFontMetrics(font);
for (int x = 1; x < xAxis.getNumberTicks(); x++) {
float xPos = leftBorder + (xInterval * x);
g.setColor(Color.GRAY);
g.drawLine((int) xPos, yVal, (int) (xPos), yVal + 5);
float axisValue =
xAxis.getLowVal()
+ (x / ((float) xAxis.getNumberTicks())) * (xAxis.getHighVal() - xAxis.getLowVal());
String axisString = new String("" + (int) (axisValue + 0.5));
float tickLabelPos = xPos - fm.stringWidth(axisString) / 2;
g.setColor(Color.BLACK);
g.drawString(axisString, (int) tickLabelPos, yVal + 18);
}
g.setColor(oldColor);
}
private void drawYAxisAndHorizontalLines(Graphics g, Font fontForAxisLabels) {
Color oldColor = g.getColor();
g.setColor(Color.BLACK);
float ySize = getHeight() - getNumPixelsReservedOnBottom();
if (selectedYAxis.isDisplayed())
g.drawLine(
selectedYAxis.getNumPixelsReserved(),
0,
selectedYAxis.getNumPixelsReserved(),
(int) ySize);
if (selectedYAxis.getNumberTicks() < 1) return;
g.setFont(fontForAxisLabels);
int leftBorder = getLeftBorder();
if (selectedYAxis.isDisplayed()) {
g.setColor(Color.RED);
g.drawString(selectedYAxis.getAxisName(), selectedYAxis.numPixelsReserved, 10);
g.setColor(Color.BLACK);
}
float yInterval = ySize / selectedYAxis.getNumberTicks();
FontMetrics fm = g.getFontMetrics(fontForAxisLabels);
int stringAscent = fm.getAscent();
for (int x = 1; x < selectedYAxis.getNumberTicks(); x++) {
int yVal = (int) (yInterval * x);
g.setColor(Color.GRAY);
g.drawLine(leftBorder, yVal, getWidth(), yVal);
float axisValue =
selectedYAxis.getHighVal()
- (x / ((float) selectedYAxis.getNumberTicks()))
* (selectedYAxis.getHighVal() - selectedYAxis.getLowVal());
String axisString = getYAxisTickLabel(axisValue);
int tickLabelPos = selectedYAxis.getNumPixelsReserved() - fm.stringWidth(axisString) - 2;
g.setColor(Color.BLACK);
if (selectedYAxis.isDisplayed())
g.drawString(axisString, tickLabelPos, yVal + stringAscent / 2);
}
g.setColor(oldColor);
}
