/**
* A hook into the Graph2D.paint method. This is called after everything has been drawn. The
* rectangle passed is the dimension of the data window.
*
* @params g Graphics state
* @params r Rectangle containing the data
*/
public void paintLast(Graphics g, Rectangle r) {
if (lastText != null) {
lastText.draw(g, r.width / 2, r.height / 2, TextLine.CENTER);
}
}
/**
* Draw a legend for this Vector set
*
* @param g Graphics context
* @param w Data Window
*/
protected void draw_legend(Graphics g, Rectangle w) {
Color c = g.getColor();
TextLine value = new TextLine();
double dx;
int ix, iy;
int length;
if (!drawlegend) return;
/*
** Calculate the vector magnitude of a line legend_length
** pixels long. This will be our standard vector
*/
dx = xrange * ((double) legend_length) / ((double) w.width) / getScaleFactor();
value.parseDouble(dx, 3);
/*
** Calculate the length of the legend
*/
length = legend_length + value.getWidth(g) + value.charWidth(g, ' ');
/*
** Calculate the position of the legend if needed.
*/
if (legend_ix == 0 && legend_iy == 0) {
legend_ix = (int) (w.x + ((legend_dx - xmin) / xrange) * w.width);
legend_iy = (int) (w.y + (1.0 - (legend_dy - ymin) / yrange) * w.height);
} else if (legend_ix == -1 && legend_iy == -1) {
legend_ix = w.x + w.width / 2 - length / 2;
legend_iy = w.y - value.getAscent(g) / 2;
}
/*
** In what follows the vector tail is the zero point. It is on
** the right - the vector points to the left
*/
if (linecolor != null) g.setColor(linecolor);
/*
** Draw the standard vector
*/
g.drawLine(legend_ix, legend_iy, legend_ix + legend_length, legend_iy);
ix = legend_ix + (int) (0.25 * (double) legend_length + 0.5);
iy = legend_iy - (int) (0.25 * (double) legend_length + 0.5);
g.drawLine(legend_ix, legend_iy, ix, iy);
ix = legend_ix + (int) (0.25 * (double) legend_length + 0.5);
iy = legend_iy + (int) (0.25 * (double) legend_length + 0.5);
g.drawLine(legend_ix, legend_iy, ix, iy);
/*
** Add the value of the standard vector. To the right of the vector
*/
value.draw(g, legend_ix + legend_length + value.charWidth(g, ' '), iy, TextLine.LEFT);
/*
** Add any legend text (above the vector) that might have been
** defined.
*/
g.setColor(c);
if (legend_text != null && !legend_text.isNull()) {
legend_text.draw(
g,
legend_ix + length / 2,
iy - value.getAscent(g) - legend_text.getDescent(g) - legend_text.getLeading(g),
TextLine.CENTER);
}
}