Example usage for java.awt.font LineMetrics getDescent

Introduction

In this page you can find the example usage for java.awt.font LineMetrics getDescent.

Prototype

public abstract float getDescent();

Source Link

Document

Returns the descent of the text.

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   w w  w.  ja  v  a  2s. 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: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  av a  2 s.  c  o 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);//  ww w  . j  a  va 2 s  . com

    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: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 a 2s  .c om*/

    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: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 ww . 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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