public void paint(Graphics g) {
gRef = (Graphics2D) g;
// change size of font
gRef.setFont(gRef.getFont().deriveFont(9.0f));
fmRef = g.getFontMetrics();
// Clear background
if (Preferences.monochrome) {
gRef.setColor(Preferences.whiteColor);
} else {
gRef.setColor(Preferences.backgroundColor);
}
gRef.fillRect(0, 0, getWidth(), getHeight());
// set colour to correct drawing colour
if (Preferences.monochrome) {
gRef.setColor(Preferences.blackColor);
} else {
gRef.setColor(Preferences.penColor);
}
gRef.translate(0, margin);
// Call c code to draw tree
gRef.scale(scale, scale);
nativeDrawTree();
}
/**
* Write the given text string in the current font, left-aligned at (x, y).
*
* @param x the x-coordinate of the text
* @param y the y-coordinate of the text
* @param s the text
*/
public static void textLeft(double x, double y, String s) {
offscreen.setFont(font);
FontMetrics metrics = offscreen.getFontMetrics();
double xs = scaleX(x);
double ys = scaleY(y);
int hs = metrics.getDescent();
offscreen.drawString(s, (float) (xs), (float) (ys + hs));
draw();
}
protected float drawBoxedString(Graphics2D g2, String s, Color c1, Color c2, double x) {
// Calculate the width of the string.
FontRenderContext frc = g2.getFontRenderContext();
TextLayout subLayout = new TextLayout(s, mFont, frc);
float advance = subLayout.getAdvance();
// Fill the background rectangle with a gradient.
GradientPaint gradient = new GradientPaint((float) x, 0, c1, (float) (x + advance), 0, c2);
g2.setPaint(gradient);
Rectangle2D bounds = mLayout.getBounds();
Rectangle2D back = new Rectangle2D.Double(x, 0, advance, bounds.getHeight());
g2.fill(back);
// Draw the string over the gradient rectangle.
g2.setPaint(Color.white);
g2.setFont(mFont);
g2.drawString(s, (float) x, (float) -bounds.getY());
return advance;
}
