Examples of FontMetrics

ae.java.awt.FontMetrics
The FontMetrics class defines a font metrics object, which encapsulates information about the rendering of a particular font on a particular screen.
Note to subclassers: Since many of these methods form closed, mutually recursive loops, you must take care that you implement at least one of the methods in each such loop to prevent infinite recursion when your subclass is used. In particular, the following is the minimal suggested set of methods to override in order to ensure correctness and prevent infinite recursion (though other subsets are equally feasible):
- {@link #getAscent()}
- {@link #getLeading()}
- {@link #getMaxAdvance()}
- {@link #charWidth(char)}
- {@link #charsWidth(char[],int,int)}
Note that the implementations of these methods are inefficient, so they are usually overridden with more efficient toolkit-specific implementations.
When an application asks to place a character at the position (x, y), the character is placed so that its reference point (shown as the dot in the accompanying image) is put at that position. The reference point specifies a horizontal line called the baseline of the character. In normal printing, the baselines of characters should align.
In addition, every character in a font has an ascent, a descent, and an advance width. The ascent is the amount by which the character ascends above the baseline. The descent is the amount by which the character descends below the baseline. The advance width indicates the position at which AWT should place the next character.
An array of characters or a string can also have an ascent, a descent, and an advance width. The ascent of the array is the maximum ascent of any character in the array. The descent is the maximum descent of any character in the array. The advance width is the sum of the advance widths of each of the characters in the character array. The advance of a String is the distance along the baseline of the String. This distance is the width that should be used for centering or right-aligning the String.
Note that the advance of a String is not necessarily the sum of the advances of its characters measured in isolation because the width of a character can vary depending on its context. For example, in Arabic text, the shape of a character can change in order to connect to other characters. Also, in some scripts, certain character sequences can be represented by a single shape, called a ligature. Measuring characters individually does not account for these transformations.
Font metrics are baseline-relative, meaning that they are generally independent of the rotation applied to the font (modulo possible grid hinting effects). See {@link ae.java.awt.Font Font}. @author Jim Graham @see ae.java.awt.Font @since JDK1.0
com.google.code.appengine.awt.FontMetrics
com.jgraph.gaeawt.java.awt.FontMetrics
java.awt.FontMetrics
org.apache.fontbox.afm.FontMetrics
org.apache.fop.fonts.FontMetrics
Main interface for access to font metrics.
org.eclipse.swt.graphics.FontMetrics
se.org/swt/">Sample code and further information
org.gwt.mosaic.core.client.FontMetrics
The {@code FontMetrics} class defines a font metrics object, whichencapsulates information about the rendering of a particular font. @author georgopoulos.georgios(at)gmail.com
org.jfree.fonts.registry.FontMetrics
Font-metrics are computed for a certain font-size and style. There are no general metrics, which are assumed to be globally available.
The use of these font metrics is application dependent. As building these metrics usually is memory and CPU intensive, this must be done in an application specific context. You certainly want to cache the font data. @author Thomas Morgner
org.pentaho.reporting.libraries.fonts.registry.FontMetrics
Font-metrics are computed for a certain font-size and style. There are no general metrics, which are assumed to be globally available.
The use of these font metrics is application dependent. As building these metrics usually is memory and CPU intensive, this must be done in an application specific context. You certainly want to cache the font data. @author Thomas Morgner

Examples of java.awt.FontMetrics

      }
      g.setFont(font);
      if (lines == 1 && !backs) {
        GraphicsUtil.drawCenteredText(g, label, x, y);
      } else {
        FontMetrics fm = g.getFontMetrics();
        int height = fm.getHeight();
        y = y - (height * lines - fm.getLeading()) / 2 + fm.getAscent(); 
        back = label.indexOf('\\');
        while (back >= 0 && back <= label.length() - 2) {
          char c = label.charAt(back + 1);
          if (c == 'n') {
            String line = label.substring(0, back);

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Examples of java.awt.FontMetrics

    if (showState) {
      String str;
      int dispStart;
      int dispEnd;
      ArrayList<Integer> specials = new ArrayList<Integer>();
      FontMetrics fm = null;
      KeyboardData state = getKeyboardState(painter);
      synchronized(state) {
        str = state.toString();
        for (int i = state.getNextSpecial(0); i >= 0; i = state.getNextSpecial(i + 1)) {
          char c = state.getChar(i);
          specials.add(Integer.valueOf(c << 16 | i));
        }
        if (!state.isDisplayValid()) {
          fm = g.getFontMetrics(DEFAULT_FONT);
          state.updateDisplay(fm);
        }
        dispStart = state.getDisplayStart();
        dispEnd = state.getDisplayEnd();
      }
      
      if (str.length() > 0) {
        Bounds bds = painter.getBounds();
        drawBuffer(g, fm, str, dispStart, dispEnd, specials, bds);
      }
    } else {
      Bounds bds = painter.getBounds();
      int len = getBufferLength(painter.getAttributeValue(ATTR_BUFFER));
      String str = Strings.get("keybDesc", "" + len);
      FontMetrics fm = g.getFontMetrics();
      int x = bds.getX() + (WIDTH - fm.stringWidth(str)) / 2;
      int y = bds.getY() + (HEIGHT + fm.getAscent()) / 2;
      g.drawString(str, x, y);
    }
  }

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Examples of java.awt.FontMetrics

    
    public void draw(InstancePainter painter) {
      KeyboardData data = getKeyboardState(painter);
      Bounds bds = painter.getInstance().getBounds();
      Graphics g = painter.getGraphics();
      FontMetrics fm = g.getFontMetrics(DEFAULT_FONT);


      String str;
      int cursor;
      int dispStart;
      synchronized(data) {
        str = data.toString();
        cursor = data.getCursorPosition();
        if (!data.isDisplayValid()) data.updateDisplay(fm);
        dispStart = data.getDisplayStart();
      }


      int asc = fm.getAscent();
      int x = bds.getX() + 8;
      if (dispStart > 0) {
        x += fm.stringWidth(str.charAt(0) + "m");
        x += fm.stringWidth(str.substring(dispStart, cursor));
      } else if (cursor >= str.length()) {
        x += fm.stringWidth(str);
      } else {
        x += fm.stringWidth(str.substring(0, cursor));
      }
      int y = bds.getY() + (bds.getHeight() + asc) / 2;
      g.drawLine(x, y - asc, x, y);
    }

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Examples of java.awt.FontMetrics

    int lineY = top + cellHeight + HEADER_SEP / 2;
    g.drawLine(left, lineY, left + tableWidth, lineY);
    
    g.setColor(Color.BLACK);
    g.setFont(HEAD_FONT);
    FontMetrics headerMetric = g.getFontMetrics();
    int x = left;
    int y = top + headerMetric.getAscent() + 1;
    for (int i = 0; i < columns; i++) {
      x = paintHeader(sel.get(i).toShortString(), x, y, g, headerMetric);
    }
    
    g.setFont(BODY_FONT);
    FontMetrics bodyMetric = g.getFontMetrics();
    Rectangle clip = g.getClipBounds();
    int firstRow = Math.max(0, (clip.y - y) / cellHeight - 1);
    int lastRow = Math.min(rowCount, 2 + (clip.y + clip.height - y) / cellHeight);
    int y0 = top + cellHeight + HEADER_SEP;
    x = left;
    for (int col = 0; col < columns; col++) {
      SelectionItem item = sel.get(col);
      ValueLog log = model.getValueLog(item);
      int radix = item.getRadix();
      int offs = rowCount - log.size();
      y = y0 + Math.max(offs, firstRow) * cellHeight;
      for (int row = Math.max(offs, firstRow); row < lastRow; row++) {
        Value val = log.get(row - offs);
        String label = val.toDisplayString(radix);
        int width = bodyMetric.stringWidth(label);
        g.drawString(label, x + (cellWidth - width) / 2,
            y + bodyMetric.getAscent());
        y += cellHeight;
      }
      x += cellWidth + COLUMN_SEP;
    }
  }

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Examples of java.awt.FontMetrics

    Graphics g = getGraphics();
    if (g == null) {
      cellHeight = 16;
      cellWidth = 24;
    } else {
      FontMetrics fm = g.getFontMetrics(HEAD_FONT);
      cellHeight = fm.getHeight();
      cellWidth = 24;
      for (int i = 0; i < columns; i++) {
        String header = sel.get(i).toShortString();
        cellWidth = Math.max(cellWidth, fm.stringWidth(header));
      }
    }
    
    tableWidth = (cellWidth + COLUMN_SEP) * columns - COLUMN_SEP;
    tableHeight = cellHeight * (1 + rowCount) + HEADER_SEP;

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Examples of java.awt.FontMetrics

        curCol = state.getCursorColumn();
      }


      g.setFont(DEFAULT_FONT);
      g.setColor(painter.getAttributeValue(Io.ATTR_COLOR));
      FontMetrics fm = g.getFontMetrics();
      int x = bds.getX() + BORDER;
      int y = bds.getY() + BORDER + (ROW_HEIGHT + fm.getAscent()) / 2;
      for (int i = 0; i < rows; i++) {
        g.drawString(rowData[i], x, y);
        if (i == curRow) {
          int x0 = x + fm.stringWidth(rowData[i].substring(0, curCol));
          g.drawLine(x0, y - fm.getAscent(), x0, y);
        }
        y += ROW_HEIGHT;
      }
    } else {
      String str = Strings.get("ttyDesc", "" + rows, "" + cols);
      FontMetrics fm = g.getFontMetrics();
      int strWidth = fm.stringWidth(str);
      if (strWidth + BORDER > bds.getWidth()) {
        str = Strings.get("ttyDescShort");
        strWidth = fm.stringWidth(str);
      }
      int x = bds.getX() + (bds.getWidth() - strWidth) / 2;
      int y = bds.getY() + (bds.getHeight() + fm.getAscent()) / 2;
      g.drawString(str, x, y);
    }
  }

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Examples of java.awt.FontMetrics

  public static int getStringWidth(Font font, String str) {
    if (str == null) {
      return 0;
    }


    FontMetrics metrics = HELPER_LABEL.getFontMetrics(font);
    return metrics.stringWidth(str);
  }

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Examples of java.awt.FontMetrics

      int length) {
    if (chars == null) {
      return 0;
    }


    FontMetrics metrics = HELPER_LABEL.getFontMetrics(font);
    return metrics.charsWidth(chars, offset, length);
  }

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Examples of java.awt.FontMetrics

    setUI(toolTipUI);
  }


  private class IconToolTipUI extends MetalToolTipUI {
    public void paint(Graphics g, JComponent c) {
      FontMetrics metrics = c.getFontMetrics(c.getFont());
      Dimension size = c.getSize();
      g.setColor(c.getBackground());
      g.fillRect(0, 0, size.width, size.height);
      int x = 3;
      if (icon != null) {
        icon.paintIcon(c, g, 1, 1);
        x += icon.getIconWidth() + 1;
      }
      g.setColor(c.getForeground());
      String text = ((JToolTip) c).getTipText();
      if (text != null && text.length() > 0) {
        g.drawString(text, x, metrics.getHeight());
      }
    }

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Examples of java.awt.FontMetrics

      String tipText = ((JToolTip) c).getTipText();
      // avoid painting by returning empty dimension for no text and no icon
      if (icon == null && (tipText == null || tipText.length() == 0)) {
        return new Dimension(0, 0);
      }
      FontMetrics metrics = c.getFontMetrics(c.getFont());
      if (tipText == null) {
        tipText = "";
      }
      int width = SwingUtilities.computeStringWidth(metrics, tipText);
      int height = metrics.getHeight() + 4;
      if (icon != null) {
        width += icon.getIconWidth() + 2;
        int iconHeight = icon.getIconHeight() + 2;
        if (iconHeight > height) {
          height = iconHeight;

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