Examples of org.apache.batik.ext.awt.LinearGradientPaint

org.apache.batik.ext.awt.LinearGradientPaint
The LinearGradientPaint class provides a way to fill a {@link Shape} with a linear color gradient pattern. The user mayspecify 2 or more gradient colors, and this paint will provide an interpolation between each color. The user also specifies start and end points which define where in user space the color gradient should begin and end.
The user must provide an array of floats specifying how to distribute the colors along the gradient. These values should range from 0.0 to 1.0 and act like keyframes along the gradient (they mark where the gradient should be exactly a particular color).
For example:

Point2D start = new Point2D.Float(0, 0); Point2D end = new Point2D.Float(100,100); float[] dist = {0.0, 0.2, 1.0}; Color[] colors = {Color.red, Color.white, Color.blue}; LinearGradientPaint p = new LinearGradientPaint(start, end, dist, colors);
This code will create a LinearGradientPaint which interpolates between red and white for the first 20% of the gradient and between white and blue for the remaining 80%.
In the event that the user does not set the first keyframe value equal to 0 and the last keyframe value equal to 1, keyframes will be created at these positions and the first and last colors will be replicated there. So, if a user specifies the following arrays to construct a gradient:
{Color.blue, Color.red}, {.3, .7}
this will be converted to a gradient with the following keyframes: {Color.blue, Color.blue, Color.red, Color.red}, {0, .3, .7, 1}
The user may also select what action the LinearGradientPaint should take when filling color outside the start and end points. If no cycle method is specified, NO_CYCLE will be chosen by default, so the endpoint colors will be used to fill the remaining area.
The following image demonstrates the options NO_CYCLE and REFLECT.

The colorSpace parameter allows the user to specify in which colorspace the interpolation should be performed, default sRGB or linearized RGB. @author Nicholas Talian, Vincent Hardy, Jim Graham, Jerry Evans @author Vincent Hardy @version $Id: LinearGradientPaint.java,v 1.2 2002/03/02 02:06:32 deweese Exp $ @see java.awt.Paint @see java.awt.Graphics2D#setPaint

  // as a single color using the color and opacity of the last gradient
  // stop.
        if (p1.getX() == p2.getX() && p1.getY() == p2.getY()) {
            return colors[colors.length-1];
  } else {
      return new LinearGradientPaint(p1,
             p2,
             offsets,
             colors,
             spreadMethod,
             colorSpace,

View Full Code Here

            return true;
        }
        // convert java.awt.GradientPaint to LinearGradientPaint to avoid rasterization
        if (paint instanceof GradientPaint) {
            GradientPaint gpaint = (GradientPaint) paint;
            paint = new LinearGradientPaint(
                    (float) gpaint.getPoint1().getX(),
                    (float) gpaint.getPoint1().getY(),
                    (float) gpaint.getPoint2().getX(),
                    (float) gpaint.getPoint2().getY(), 
                    new float[] {0, 1}, 
                    new Color[] {gpaint.getColor1(), gpaint.getColor2()},
                    gpaint.isCyclic() ? LinearGradientPaint.REPEAT : LinearGradientPaint.NO_CYCLE);
        }
        if (paint instanceof LinearGradientPaint) {
            LinearGradientPaint gp = (LinearGradientPaint)paint;


            // This code currently doesn't support 'repeat'.
            // For linear gradients it is possible to construct
            // a 'tile' that is repeated with a PDF pattern, but
            // it would be very tricky as you would have to rotate
            // the coordinate system so the repeat was axially
            // aligned.  At this point I'm just going to rasterize it.
            MultipleGradientPaint.CycleMethodEnum cycle = gp.getCycleMethod();
            if (cycle != MultipleGradientPaint.NO_CYCLE) {
                return false;
            }


            Color[] cols = gp.getColors();
            float[] fractions = gp.getFractions();


            // Build proper transform from gradient space to page space
            // ('Patterns' don't get userspace transform).
            AffineTransform transform;
            transform = new AffineTransform(getBaseTransform());
            transform.concatenate(getTransform());
            transform.concatenate(gp.getTransform());


            List theMatrix = new java.util.ArrayList();
            double [] mat = new double[6];
            transform.getMatrix(mat);
            for (int idx = 0; idx < mat.length; idx++) {
                theMatrix.add(new Double(mat[idx]));
            }


            Point2D p1 = gp.getStartPoint();
            Point2D p2 = gp.getEndPoint();
            List theCoords = new java.util.ArrayList();
            theCoords.add(new Double(p1.getX()));
            theCoords.add(new Double(p1.getY()));
            theCoords.add(new Double(p2.getX()));
            theCoords.add(new Double(p2.getY()));

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  // as a single color using the color and opacity of the last gradient
  // stop.
        if (p1.getX() == p2.getX() && p1.getY() == p2.getY()) {
            return colors[colors.length-1];
  } else {
      return new LinearGradientPaint(p1,
             p2,
             offsets,
             colors,
             spreadMethod,
             colorSpace,

View Full Code Here

  // as a single color using the color and opacity of the last gradient
  // stop.
        if (p1.getX() == p2.getX() && p1.getY() == p2.getY()) {
            return colors[colors.length-1];
  } else {
      return new LinearGradientPaint(p1,
             p2,
             offsets,
             colors,
             spreadMethod,
             colorSpace,

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    solid_icons_map_.put("fill_color", new SolidColoredIcon(Color.BLACK, 20, 20, 2, 2));
    solid_icons_map_.put("text_color", new SolidColoredIcon(Color.BLACK, 20, 20, 2, 2));


    gradient_icons_map_.put(
      "fill_gradient",
      new GradientIcon(new LinearGradientPaint(
    JGradientChooser.START_,
    JGradientChooser.CENTER_,
    JGradientChooser.fractions_,
    JGradientChooser.colors,
    MultipleGradientPaint.NO_CYCLE,

View Full Code Here

    if (type_.getSelectedIndex() == 0)
    {
      if (repeat_.getSelectedIndex() == 0)
      {
        gradient_ =
          new LinearGradientPaint(
            JGradientChooser.START_,
            JGradientChooser.CENTER_,
            JGradientChooser.fractions_,
            colors,
            MultipleGradientPaint.NO_CYCLE,
            MultipleGradientPaint.SRGB);
      }
      else
        if (repeat_.getSelectedIndex() == 1)
        {
          gradient_ =
            new LinearGradientPaint(
              JGradientChooser.START_,
              JGradientChooser.CENTER_,
              JGradientChooser.fractions_,
              colors,
              MultipleGradientPaint.REFLECT,
              MultipleGradientPaint.SRGB);
        }
        else
        {
          gradient_ =
            new LinearGradientPaint(
              JGradientChooser.START_,
              JGradientChooser.CENTER_,
              JGradientChooser.fractions_,
              colors,
              MultipleGradientPaint.REPEAT,

View Full Code Here

   */
  public void paintIcon(Component comp, Graphics g, int x, int y)
  {
    if (gradient_ instanceof LinearGradientPaint)
    {
      LinearGradientPaint tmp_gradient = (LinearGradientPaint) gradient_;


      Point2D.Float start =  new Point2D.Float(start_.x+x,start_.y+y);
      Point2D.Float end =  new Point2D.Float(center_.x+x,center_.y+y);


      transformed_gradient_ =
        new LinearGradientPaint(start, end, tmp_gradient.getFractions(), tmp_gradient.getColors(), tmp_gradient.getCycleMethod(), MultipleGradientPaint.SRGB);
    }
    else
    {
      RadialGradientPaint tmp_gradient = (RadialGradientPaint) gradient_;


      Point2D.Float center =  new Point2D.Float(center_.x+x,center_.y+y);
        Point2D.Float end =  new Point2D.Float(end_.x+x,end_.y+y);


      transformed_gradient_ =
        new RadialGradientPaint(
          center,
          (float) center.distance(end) / 2,
          center,
          tmp_gradient.getFractions(),
          tmp_gradient.getColors(),
          tmp_gradient.getCycleMethod(),
          MultipleGradientPaint.SRGB);
    }


    Graphics2D g2 = (Graphics2D) g;
    Color c = g.getColor();

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  {
    String rv = "";


    if (gradient instanceof LinearGradientPaint)
    {
      LinearGradientPaint tmp_gradient = (LinearGradientPaint) gradient;
      rv = "<linearGradient id=\"" + name + "\" gradientUnits = \"userSpaceOnUse\"";
      rv += " x1=\"" + tmp_gradient.getStartPoint().getX() + "\"";
      rv += " y1=\"" + tmp_gradient.getStartPoint().getY() + "\"";
      rv += " x2=\"" + tmp_gradient.getEndPoint().getX() + "\"";
      rv += " y2=\"" + tmp_gradient.getEndPoint().getY() + "\"";
      rv += " spreadMethod=\"" + translateCycleMethodToSVG(tmp_gradient.getCycleMethod()) + "\">";
      rv += "<stop offset=\"0\" " + toSVGGradientColor(tmp_gradient.getColors()[0]) + "/>";
      rv += "<stop offset=\"1\" " + toSVGGradientColor(tmp_gradient.getColors()[1]) + "/>";
      rv += "</linearGradient>";
    }
    else
    {
      RadialGradientPaint tmp_gradient = (RadialGradientPaint) gradient;
      rv = "<radialGradient id=\"" + name + "\" gradientUnits = \"userSpaceOnUse\"";
      rv += " cx=\"" + tmp_gradient.getCenterPoint().getX() + "\"";
      rv += " cy=\"" + tmp_gradient.getCenterPoint().getY() + "\"";
      rv += " r=\"" + tmp_gradient.getRadius() + "\"";
      rv += " fx=\"" + tmp_gradient.getFocusPoint().getX() + "\"";
      rv += " fy=\"" + tmp_gradient.getFocusPoint().getY() + "\"";
      rv += " spreadMethod=\"" + translateCycleMethodToSVG(tmp_gradient.getCycleMethod()) + "\">";
      rv += "<stop offset=\"0\" " + toSVGGradientColor(tmp_gradient.getColors()[0]) + "/>";
      rv += "<stop offset=\"1\" " + toSVGGradientColor(tmp_gradient.getColors()[1]) + "/>";
      rv += "</radialGradient>";
    }


    return rv;
  }

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  {
    if (gradient_ != null)
    {
      if (gradient_ instanceof LinearGradientPaint)
      {
        LinearGradientPaint tmp_gradient = (LinearGradientPaint) gradient_;
        Point2D.Double start = new Point2D.Double(tmp_gradient.getStartPoint().getX() + x, tmp_gradient.getStartPoint().getY() + y);
        Point2D.Double end = new Point2D.Double(tmp_gradient.getEndPoint().getX() + x, tmp_gradient.getEndPoint().getY() + y);
        gradient_ = new LinearGradientPaint(start, end, tmp_gradient.getFractions(), tmp_gradient.getColors(), tmp_gradient.getCycleMethod(), tmp_gradient.getColorSpace());
      }
      else
      {
        RadialGradientPaint tmp_gradient = (RadialGradientPaint) gradient_;
        Point2D.Double center = new Point2D.Double(tmp_gradient.getCenterPoint().getX() + x, tmp_gradient.getCenterPoint().getY() + y);
        gradient_ =
          new RadialGradientPaint(
            center,
            tmp_gradient.getRadius(),
            center,
            tmp_gradient.getFractions(),
            tmp_gradient.getColors(),
            tmp_gradient.getCycleMethod(),
            tmp_gradient.getColorSpace());
      }
    }
  }

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    if (xml_gradient.getNodeName().equals("linearGradient"))
    {
      Point2D.Double start = new Point2D.Double(Double.parseDouble(xml_gradient.getAttribute("x1")), Double.parseDouble(xml_gradient.getAttribute("y1")));
      Point2D.Double end = new Point2D.Double(Double.parseDouble(xml_gradient.getAttribute("x2")), Double.parseDouble(xml_gradient.getAttribute("y2")));
      awt_gradient =
        new LinearGradientPaint(
          start,
          end,
          JGradientChooser.fractions_,
          translateSVGGradientColorsToAWT(xml_gradient),
          translateSVGSpreadToCycleMethod(xml_gradient),

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