Examples of java.awt.font.FontRenderContext

java.awt.font.FontRenderContext
The FontRenderContext class is a container for the information needed to correctly measure text. The measurement of text can vary because of rules that map outlines to pixels, and rendering hints provided by an application.
One such piece of information is a transform that scales typographical points to pixels. (A point is defined to be exactly 1/72 of an inch, which is slightly different than the traditional mechanical measurement of a point.) A character that is rendered at 12pt on a 600dpi device might have a different size than the same character rendered at 12pt on a 72dpi device because of such factors as rounding to pixel boundaries and hints that the font designer may have specified.
Anti-aliasing and Fractional-metrics specified by an application can also affect the size of a character because of rounding to pixel boundaries.
Typically, instances of FontRenderContext are obtained from a {@link java.awt.Graphics2D Graphics2D} object. AFontRenderContext which is directly constructed will most likely not represent any actual graphics device, and may lead to unexpected or incorrect results.
@see java.awt.RenderingHints#KEY_TEXT_ANTIALIASING @see java.awt.RenderingHints#KEY_FRACTIONALMETRICS @see java.awt.Graphics2D#getFontRenderContext() @see java.awt.font.LineMetrics

      // so that fonts were always rendered with FractionalMetrics enabled.
      // Since 1.4, fonts are always rendered with FractionalMetrics disabled.


      // On a 1.4 version, the aliasing has no influence on non-fractional metrics
      // aliasing has no influence on any version if fractional metrics are enabled.
      final FontRenderContext frcAlias = new FontRenderContext(null, true, false);
      final FontRenderContext frcNoAlias = new FontRenderContext(null, false, false);
      final Font font = new Font("Serif", Font.PLAIN, 10);
      final String myText = "A simple text with some characters to calculate the length.";


      final double wAlias = font.getStringBounds(myText, 0, myText.length(), frcAlias)
          .getWidth();

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    {
      if (fontRenderContext == null)
      {
        if (isAliased())
        {
          fontRenderContext = new FontRenderContext(null, isAliased(), true);
        }
        else
        {
          // buggy is only important on non-aliased environments ...
          // dont use fractional metrics on buggy versions


          // use int_metrics wenn buggy ...
          fontRenderContext = new FontRenderContext(null, isAliased(), isBuggyVersion() == false);
        }
      }
      return fontRenderContext;
    }

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            tableFilter.setTableHeader(getTableHeader());
            setModel(tableFilter);
            setRowSelectionAllowed(false);
      setColumnSelectionAllowed(false);
      Font f = getFont();
      fontRendererContext = new FontRenderContext(f.getTransform(), false, false);
      setRowHeight((int)f.getMaxCharBounds(fontRendererContext).getHeight());
      renderer=createTableRenderer(tableModel);
      addMouseListener(LoggingPanel.this);
    }

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      Line2D lLine = new Line2D.Double(center_x, center_y, lX, lY );
          g.setColor(Color.black);
          g.draw(lLine);


          // draw the label 
          lLabel = new TextLayout("" + model.getColumnValueAt(lCol), new Font("Courier", Font.BOLD, 9), new FontRenderContext(null, true, false));
          g.setColor(Color.black);
            
            // Move the labels in the lower half circle down a bit, so the upper left corner touches the axis
            if ((lRotation <= Math.PI / 2) && (lRotation >= -Math.PI / 2))
                lY += lLabel.getBounds().getHeight();

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        else
           pointzero = yaxis1.transform(new Point2D.Float((float)con.getMinimumColumnValue(),
                                                         0f),
                                        null);
         
        FontRenderContext columnTopfrc = null;
        LineMetrics lm = null;
        DecimalFormat df = null;
        Rectangle2D fontRec = null;
        String columnTop = null;
        if (barTopFormat != null) {
            g.setFont(barTopFont);
            columnTopfrc = new FontRenderContext(null, false, false);
        }
        /* We paint the values starting at x-value "0".
         * As we only render BarCharts for ChartDataModels with
         * non-numeric x-axis values we don't have to read those
         * values from the data model. You can look in

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@Component
public class TextServiceImpl implements TextService {


  public Rectangle2D getStringBounds(String text, FontStyleInfo fontStyle) {
    Font font = getFont(fontStyle);
    return font.getStringBounds(text, 0, text.length(), new FontRenderContext(new AffineTransform(), true, true));
  }

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     * @return a non-null Dimension object
     */
    public Dimension getPreferredSize() {
        Rectangle2D titleBounds = 
            getFont().getStringBounds(getText(), 
                                      new FontRenderContext(null, true, false));
        
        return new Dimension((int)titleBounds.getWidth(),
                             (int)titleBounds.getHeight());
    }

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    }
        
        // draw X-Axis label right below the Arrow ?!
        g.setColor(Color.black);
        TextLayout layoutX = new TextLayout(getXAxisUnit(), getFont(), 
                                           new FontRenderContext(null, true, false));
    layoutX.draw(g, (float)x.getX2() + (float)ARROWLENGTH / 3,  (float)x.getY2() + (float)layoutX.getBounds().getHeight() + 5);
        
        // draw Y-Axis Arrow
    if(shouldDrawArrows) {
      g.drawLine((int)y.getX1(), (int)y.getY1(), (int)y.getX1(), (int)y.getY1() - ARROWLENGTH);
      g.fillPolygon(new int[] {(int)(y.getX1() - 3),
            (int)(y.getX1() + 3),
            (int)(y.getX1())},
            new int[] {(int)(y.getY1() - ARROWLENGTH / 3.0),
            (int)(y.getY1() - ARROWLENGTH / 3.0),
            (int)y.getY1() - ARROWLENGTH},
            3);
    }


        // draw Y-Axis label right below the Arrow ?!
        g.setColor(Color.black);
        TextLayout layoutY = new TextLayout(getYAxisUnit(), getFont(), 
                                           new FontRenderContext(null, true, false));
        layoutY.draw(g, (float)y.getX1()-6-(float)layoutY.getBounds().getWidth(), 
                        (float)y.getY1() - layoutX.getDescent() - 3);
        
        if(getSecondYAxis() != null) {
            Line2D y2 = c.getSecondYAxisLine2D();

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    public static int getTextLength(Graphics g, String text) {
        if(text.length() == 0)
            return 0;
        Graphics2D g2 = (Graphics2D) g;
        FontRenderContext frc = g2.getFontRenderContext();
        Font font = g.getFont();
        TextLayout layout = new TextLayout(text, font, frc);
        Rectangle2D bounds = layout.getBounds();
        return (int) bounds.getWidth() + 1;
    }

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        else if(constraints.getMaximumValue().doubleValue() < 0)
            ypt = constraints.getMaximumValue().doubleValue();
        boolean paint = false;
        
        DecimalFormat df = c.getXDecimalFormat();
    FontRenderContext frc = c.getFontRenderContext();
        Font f = c.getFont();
        
        for(double d = min; d <= max; d += tick) {
            if(paint) {
                String sb = df.format(d);

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