Example usage for java.awt Font getLineMetrics

Introduction

In this page you can find the example usage for java.awt Font getLineMetrics.

Prototype

public LineMetrics getLineMetrics(String str, FontRenderContext frc) 

Source Link

Document

Returns a LineMetrics object created with the specified String and FontRenderContext .

Usage

From source file:FontShow.java

public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    Font font = new Font("Dialog", Font.PLAIN, 96);
    g2.setFont(font);/*from   ww w. j av  a  2 s.  co  m*/
    int width = getSize().width;
    int height = getSize().height;

    String message = "Java2s";

    FontRenderContext frc = g2.getFontRenderContext();
    LineMetrics metrics = font.getLineMetrics(message, frc);
    float messageWidth = (float) font.getStringBounds(message, frc).getWidth();

    // center text
    float ascent = metrics.getAscent();
    float descent = metrics.getDescent();
    float x = (width - messageWidth) / 2;
    float y = (height + metrics.getHeight()) / 2 - descent;

    int PAD = 25;
    g2.setPaint(getBackground());
    g2.fillRect(0, 0, width, height);

    g2.setPaint(getForeground());
    g2.drawString(message, x, y);

    g2.setPaint(Color.white); // Base lines
    drawLine(g2, x - PAD, y, x + messageWidth + PAD, y);
    drawLine(g2, x, y + PAD, x, y - ascent - PAD);
    g2.setPaint(Color.green); // Ascent line
    drawLine(g2, x - PAD, y - ascent, x + messageWidth + PAD, y - ascent);
    g2.setPaint(Color.red); // Descent line
    drawLine(g2, x - PAD, y + descent, x + messageWidth + PAD, y + descent);
}

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From source file:MainClass.java

public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    Font font = new Font("Serif", Font.PLAIN, 72);
    g2.setFont(font);//from www .j  a v  a2s .  c  o  m

    String s = "www.java2s.com";
    float x = 50, y = 150;

    FontRenderContext frc = g2.getFontRenderContext();
    float width = (float) font.getStringBounds(s, frc).getWidth();
    Line2D baseline = new Line2D.Float(x, y, x + width, y);
    g2.setPaint(Color.lightGray);
    g2.draw(baseline);

    // Draw the ascent.
    LineMetrics lm = font.getLineMetrics(s, frc);
    Line2D ascent = new Line2D.Float(x, y - lm.getAscent(), x + width, y - lm.getAscent());
    g2.draw(ascent);

    // Draw the descent.
    Line2D descent = new Line2D.Float(x, y + lm.getDescent(), x + width, y + lm.getDescent());
    g2.draw(descent);

    // Draw the leading.
    Line2D leading = new Line2D.Float(x, y + lm.getDescent() + lm.getLeading(), x + width,
            y + lm.getDescent() + lm.getLeading());
    g2.draw(leading);

    // Render the string.
    g2.setPaint(Color.black);
    g2.drawString(s, x, y);
}

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From source file:Main.java

public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    Font font = new Font("Serif", Font.PLAIN, 72);
    g2.setFont(font);// ww w .  j a v  a2 s.co  m

    String s = "this is a test";
    float x = 50, y = 150;

    // Draw the baseline.
    FontRenderContext frc = g2.getFontRenderContext();
    float width = (float) font.getStringBounds(s, frc).getWidth();
    Line2D baseline = new Line2D.Float(x, y, x + width, y);
    g2.setPaint(Color.red);
    g2.draw(baseline);

    // Draw the ascent.
    LineMetrics lm = font.getLineMetrics(s, frc);
    Line2D ascent = new Line2D.Float(x, y - lm.getAscent(), x + width, y - lm.getAscent());
    g2.draw(ascent);

    // Draw the descent.
    Line2D descent = new Line2D.Float(x, y + lm.getDescent(), x + width, y + lm.getDescent());
    g2.draw(descent);

    // Draw the leading.
    Line2D leading = new Line2D.Float(x, y + lm.getDescent() + lm.getLeading(), x + width,
            y + lm.getDescent() + lm.getLeading());
    g2.draw(leading);

    // Render the string.
    g2.setPaint(Color.black);
    g2.drawString(s, x, y);
}

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From source file:LineMetricsIllustration.java

public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    Font font = new Font("Serif", Font.PLAIN, 72);
    g2.setFont(font);/*w  ww  . j a  va 2  s  . c om*/

    String s = "Java Source and Support";
    float x = 50, y = 150;

    // Draw the baseline.
    FontRenderContext frc = g2.getFontRenderContext();
    float width = (float) font.getStringBounds(s, frc).getWidth();
    Line2D baseline = new Line2D.Float(x, y, x + width, y);
    g2.setPaint(Color.red);
    g2.draw(baseline);

    // Draw the ascent.
    LineMetrics lm = font.getLineMetrics(s, frc);
    Line2D ascent = new Line2D.Float(x, y - lm.getAscent(), x + width, y - lm.getAscent());
    g2.draw(ascent);

    // Draw the descent.
    Line2D descent = new Line2D.Float(x, y + lm.getDescent(), x + width, y + lm.getDescent());
    g2.draw(descent);

    // Draw the leading.
    Line2D leading = new Line2D.Float(x, y + lm.getDescent() + lm.getLeading(), x + width,
            y + lm.getDescent() + lm.getLeading());
    g2.draw(leading);

    // Render the string.
    g2.setPaint(Color.black);
    g2.drawString(s, x, y);
}

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From source file:net.sf.jasperreports.engine.fill.SimpleTextLineWrapper.java

protected float determineLeading(Font font) {
    LineMetrics lineMetrics = font.getLineMetrics(" ", context.getFontRenderContext());
    return lineMetrics.getLeading();
}

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From source file:Chart.java

 public void paintComponent(Graphics g)
{
   Graphics2D g2 = (Graphics2D) g;

   // compute the minimum and maximum values
   if (values == null) return;
   double minValue = 0;
   double maxValue = 0;
   for (double v : values)
   {//from   w w w .  j  a va 2  s . c o m
      if (minValue > v) minValue = v;
      if (maxValue < v) maxValue = v;
   }
   if (maxValue == minValue) return;

   int panelWidth = getWidth();
   int panelHeight = getHeight();

   Font titleFont = new Font("SansSerif", Font.BOLD, 20);
   Font labelFont = new Font("SansSerif", Font.PLAIN, 10);

   // compute the extent of the title
   FontRenderContext context = g2.getFontRenderContext();
   Rectangle2D titleBounds = titleFont.getStringBounds(title, context);
   double titleWidth = titleBounds.getWidth();
   double top = titleBounds.getHeight();

   // draw the title
   double y = -titleBounds.getY(); // ascent
   double x = (panelWidth - titleWidth) / 2;
   g2.setFont(titleFont);
   g2.drawString(title, (float) x, (float) y);

   // compute the extent of the bar labels
   LineMetrics labelMetrics = labelFont.getLineMetrics("", context);
   double bottom = labelMetrics.getHeight();

   y = panelHeight - labelMetrics.getDescent();
   g2.setFont(labelFont);

   // get the scale factor and width for the bars
   double scale = (panelHeight - top - bottom) / (maxValue - minValue);
   int barWidth = panelWidth / values.length;

   // draw the bars
   for (int i = 0; i < values.length; i++)
   {
      // get the coordinates of the bar rectangle
      double x1 = i * barWidth + 1;
      double y1 = top;
      double height = values[i] * scale;
      if (values[i] >= 0) y1 += (maxValue - values[i]) * scale;
      else
      {
         y1 += maxValue * scale;
         height = -height;
      }

      // fill the bar and draw the bar outline
      Rectangle2D rect = new Rectangle2D.Double(x1, y1, barWidth - 2, height);
      g2.setPaint(Color.RED);
      g2.fill(rect);
      g2.setPaint(Color.BLACK);
      g2.draw(rect);

      // draw the centered label below the bar
      Rectangle2D labelBounds = labelFont.getStringBounds(names[i], context);

      double labelWidth = labelBounds.getWidth();
      x = x1 + (barWidth - labelWidth) / 2;
      g2.drawString(names[i], (float) x, (float) y);
   }
}

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From source file:spinworld.gui.RadarPlot.java

/**
 * Draws the label for one axis.//from ww w.  j a  va2 s  .c  o m
 *
 * @param g2  the graphics device.
 * @param plotArea  whole plot drawing area (e.g. including space for labels)
 * @param plotDrawingArea  the plot drawing area (just spanning of axis)
 * @param value  the value of the label (ignored).
 * @param cat  the category (zero-based index).
 * @param startAngle  the starting angle.
 * @param extent  the extent of the arc.
 */
protected void drawLabel(Graphics2D g2, Rectangle2D plotArea, Rectangle2D plotDrawingArea, double value,
        int cat, double startAngle, double extent) {
    FontRenderContext frc = g2.getFontRenderContext();

    String label = null;
    if (this.dataExtractOrder == TableOrder.BY_ROW) {
        // if series are in rows, then the categories are the column keys
        label = this.labelGenerator.generateColumnLabel(this.dataset, cat);
    } else {
        // if series are in columns, then the categories are the row keys
        label = this.labelGenerator.generateRowLabel(this.dataset, cat);
    }

    double angle = normalize(startAngle);

    Font font = getLabelFont();
    Point2D labelLocation;
    do {
        Rectangle2D labelBounds = font.getStringBounds(label, frc);
        LineMetrics lm = font.getLineMetrics(label, frc);
        double ascent = lm.getAscent();

        labelLocation = calculateLabelLocation(labelBounds, ascent, plotDrawingArea, startAngle);

        boolean leftOut = angle > 90 && angle < 270 && labelLocation.getX() < plotArea.getX();
        boolean rightOut = (angle < 90 || angle > 270)
                && labelLocation.getX() + labelBounds.getWidth() > plotArea.getX() + plotArea.getWidth();

        if (leftOut || rightOut) {
            font = font.deriveFont(font.getSize2D() - 1);
        } else {
            break;
        }
    } while (font.getSize() > 8);

    Composite saveComposite = g2.getComposite();

    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f));
    g2.setPaint(getLabelPaint());
    g2.setFont(font);
    g2.drawString(label, (float) labelLocation.getX(), (float) labelLocation.getY());
    g2.setComposite(saveComposite);
}

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From source file:org.kalypsodeegree_impl.graphics.displayelements.LabelFactory.java

/**
 * Generates <tt>Label</tt> -representations for a given <tt>LabelDisplayElement</tt>.
 *///w w w . ja v  a  2s  .co m
public Label[] createLabels() throws GM_Exception {
    try {
        final Feature feature = m_element.getFeature();

        final String caption = m_element.getLabel().evaluate(feature);
        // sanity check: empty labels are ignored
        if (StringUtils.isBlank(caption))
            return EMPTY_LABELS;

        // gather font information
        final org.kalypsodeegree.graphics.sld.Font sldFont = m_symbolizer.getFont();
        final java.awt.Font font = new java.awt.Font(sldFont.getFamily(feature),
                sldFont.getStyle(feature) | sldFont.getWeight(feature), sldFont.getSize(feature));
        m_graphics.setFont(font);

        final Color color = sldFont.getColor(feature);

        final FontRenderContext frc = m_graphics.getFontRenderContext();

        // bugstories...
        // I got the following error in the next line:
        // # An unexpected error has been detected by HotSpot Virtual Machine:
        // # [...]
        // # Problematic frame:
        // # C [libfontmanager.so+0x2ecd5]
        //
        // while running kalypso on linux, kubuntu-Dapper.
        // The error was caused by some buggy fonts in Dapper (Rekha-normal and aakar-MagNet ).
        // Work-around is to remove the toxic fonts by removing the package ttf-gujarati-fonts from the distribution.
        // this error was not easy to locate, so do not remove this notice !
        // ( v.doemming@tuhh.de )

        final Rectangle2D bounds = font.getStringBounds(caption, frc);
        final Dimension size = bounds.getBounds().getSize();
        final LineMetrics metrics = font.getLineMetrics(caption, frc);

        final GM_Object[] geometries = m_element.getGeometry();
        final List<Label> allLabels = new ArrayList<>();
        for (final GM_Object geometry : geometries) {
            final Label[] labels = createLabels(feature, caption, geometry, font, color, metrics, size);
            allLabels.addAll(Arrays.asList(labels));
        }

        return allLabels.toArray(new Label[allLabels.size()]);
    } catch (final FilterEvaluationException e) {
        // if properties are unknown to features, this should be ignored!
        return EMPTY_LABELS;
    }
}

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