Graphics - Java Examples in a Nutshell - page 286

Example 11•10: Paints.java (continued)

// Note: the 4th arg to Color() constructor specifies color opacity
g.setPaint(new GradientPaint(0, 0, new Color(0, 150, 0),
20, 20, new Color(0, 150, 0, 0), true));
g.setStroke(new BasicStroke(15)); // use wide lines
g.drawRect(25, 25, WIDTH-50, HEIGHT-50); // draw the box

// The glyphs of fonts can be used as Shape objects, which enables
// us to use Java2D techniques with letters Just as we would with
// any other shape. Here we get some letter shapes to draw.
Font font = new Font("Serif", Font.BOLD, 10); // a basic font
Font bigfont = // a scaled up version
font.deriveFont(AffineTransform.getScaleInstance(30.0, 30.0));
GlyphVector gv = bigfont.createGlyphVector(g.getFontRenderContext(),
"JAV");

Shape jshape = gv.getGlyphOutline(0); // Shape of letter J

Shape ashape = gv.getGlyphOutline(1); // Shape of letter A

Shape vshape = gv.getGlyphOutline(2); // Shape of letter V

// We're going to outline the letters with a 5-pixel wide line
g.setStroke(new BasicStroke(5.0f));

// We're going to fake shadows for the letters using the
// following Paint and AffineTransform objects
Paint shadowPaint = new Color(0, 0, 0, 100); // Translucent black

AffineTransform shadowTransform =
AffineTransform.getShearInstance(-1.0, 0.0); // Shear to the right
shadowTransform.scale(1.0, 0.5); // Scale height by 1/2

// Move to the baseline of our first letter
g.translate(65, 270);

// Draw the shadow of the J shape
g.setPaint(shadowPaint);
g.translate(15,20); // Compensate for the descender of the J
// transform the J into the shape of its shadow, and fill it
g.fill(shadowTransform.createTransformedShape(jshape));
g.translate(-15,-20); // Undo the translation above

// Now fill the J shape with a solid (and opaque) color
g.setPaint(Color.blue); // Fill with solid, opaque blue

g.fill(jshape); // Fill the shape

g.setPaint(Color.black); // Switch to solid black

g.draw(jshape); // And draw the outline of the J

// Now draw the A shadow
g.translate(75, 0); // Move to the right
g.setPaint(shadowPaint); // Set shadow color
g.fill(shadowTransform.createTransformedShape(ashape)); // draw shadow

// Draw the A shape using a solid transparent color
g.setPaint(new Color(0, 255, 0, 125)); // Transparent green as paint
g.fill(ashape); // Fill the shape

g.setPaint(Color.black); // Switch to solid back

g.draw(ashape); // Draw the outline

// Move to the right and draw the shadow of the letter V
g.translate(175, 0);
g.setPaint(shadowPaint);