/**
* Draw a legend for this data set
*
* @param g Graphics context
* @param w Data Window
*/
protected void draw_legend(Graphics g, Rectangle w) {
Color c = g.getColor();
Markers m = null;
if (legend_text == null) return;
if (legend_text.isNull()) return;
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);
}
if (linestyle != DataSet.NOLINE) {
if (linecolor != null) g.setColor(linecolor);
g.drawLine(legend_ix, legend_iy, legend_ix + legend_length, legend_iy);
}
if (marker > 0) {
m = g2d.getMarkers();
if (m != null) {
if (markercolor != null) g.setColor(markercolor);
else g.setColor(c);
m.draw(g, marker, 1.0, legend_ix + legend_length / 2, legend_iy);
}
}
legend_text.draw(
g,
legend_ix + legend_length + legend_text.charWidth(g, ' '),
legend_iy + legend_text.getAscent(g) / 3);
g.setColor(c);
}
/**
* Define a data legend in the graph window
*
* @param x data position of the legend.
* @param y data position of the legend.
* @param text text to display in the legend
*/
public void legend(double x, double y, String text) {
if (text == null) {
legend_text = null;
return;
}
if (legend_text == null) legend_text = new TextLine(text);
else legend_text.setText(text);
legend_text.setJustification(TextLine.LEFT);
legend_dx = x;
legend_dy = y;
legend_ix = 0;
legend_iy = 0;
}
/**
* Copy the state of the parsed Textline into the existing object.
*
* @param t The TextLine to get the state information from.
*/
public void copyState(TextLine t) {
if (t == null) return;
font = t.getFont();
color = t.getColor();
justification = t.getJustification();
if (font == null) return;
fontname = font.getName();
fontstyle = font.getStyle();
fontsize = font.getSize();
parse = true;
}
/**
* 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);
}
}
/**
* Set the color for the legend text
*
* @param c color
*/
public void legendColor(Color c) {
if (c == null) return;
if (legend_text == null) legend_text = new TextLine();
legend_text.setColor(c);
}
/**
* Set the font to be used in the legend
*
* @param f font
*/
public void legendFont(Font f) {
if (f == null) return;
if (legend_text == null) legend_text = new TextLine();
legend_text.setFont(f);
}
/**
* 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);
}
}