下面列出了java.awt.font.LineMetrics#getDescent ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public Rectangle2D getLogicalBounds() {
setFRCTX();
initPositions();
LineMetrics lm = font.getLineMetrics("", frc);
float minX, minY, maxX, maxY;
// horiz only for now...
minX = 0;
minY = -lm.getAscent();
maxX = 0;
maxY = lm.getDescent() + lm.getLeading();
if (glyphs.length > 0) {
maxX = positions[positions.length - 2];
}
return new Rectangle2D.Float(minX, minY, maxX - minX, maxY - minY);
}
public Rectangle2D getLogicalBounds() {
setFRCTX();
initPositions();
LineMetrics lm = font.getLineMetrics("", frc);
float minX, minY, maxX, maxY;
// horiz only for now...
minX = 0;
minY = -lm.getAscent();
maxX = 0;
maxY = lm.getDescent() + lm.getLeading();
if (glyphs.length > 0) {
maxX = positions[positions.length - 2];
}
return new Rectangle2D.Float(minX, minY, maxX - minX, maxY - minY);
}
public Rectangle2D getLogicalBounds() {
setFRCTX();
initPositions();
LineMetrics lm = font.getLineMetrics("", frc);
float minX, minY, maxX, maxY;
// horiz only for now...
minX = 0;
minY = -lm.getAscent();
maxX = 0;
maxY = lm.getDescent() + lm.getLeading();
if (glyphs.length > 0) {
maxX = positions[positions.length - 2];
}
return new Rectangle2D.Float(minX, minY, maxX - minX, maxY - minY);
}
public Rectangle2D getLogicalBounds() {
setFRCTX();
initPositions();
LineMetrics lm = font.getLineMetrics("", frc);
float minX, minY, maxX, maxY;
// horiz only for now...
minX = 0;
minY = -lm.getAscent();
maxX = 0;
maxY = lm.getDescent() + lm.getLeading();
if (glyphs.length > 0) {
maxX = positions[positions.length - 2];
}
return new Rectangle2D.Float(minX, minY, maxX - minX, maxY - minY);
}
public Rectangle2D getLogicalBounds() {
setFRCTX();
initPositions();
LineMetrics lm = font.getLineMetrics("", frc);
float minX, minY, maxX, maxY;
// horiz only for now...
minX = 0;
minY = -lm.getAscent();
maxX = 0;
maxY = lm.getDescent() + lm.getLeading();
if (glyphs.length > 0) {
maxX = positions[positions.length - 2];
}
return new Rectangle2D.Float(minX, minY, maxX - minX, maxY - minY);
}
public Rectangle2D getLogicalBounds() {
setFRCTX();
initPositions();
LineMetrics lm = font.getLineMetrics("", frc);
float minX, minY, maxX, maxY;
// horiz only for now...
minX = 0;
minY = -lm.getAscent();
maxX = 0;
maxY = lm.getDescent() + lm.getLeading();
if (glyphs.length > 0) {
maxX = positions[positions.length - 2];
}
return new Rectangle2D.Float(minX, minY, maxX - minX, maxY - minY);
}
/**
* Calculates the vertical offset between the baseline and the specified
* text anchor.
*
* @param g2 the graphics device.
* @param anchor the anchor.
*
* @return the offset.
*/
public float calculateBaselineOffset(Graphics2D g2, TextAnchor anchor) {
float result = 0.0f;
FontMetrics fm = g2.getFontMetrics(this.font);
LineMetrics lm = fm.getLineMetrics("ABCxyz", g2);
if (anchor == TextAnchor.TOP_LEFT || anchor == TextAnchor.TOP_CENTER
|| anchor == TextAnchor.TOP_RIGHT) {
result = lm.getAscent();
}
else if (anchor == TextAnchor.BOTTOM_LEFT
|| anchor == TextAnchor.BOTTOM_CENTER
|| anchor == TextAnchor.BOTTOM_RIGHT) {
result = -lm.getDescent() - lm.getLeading();
}
return result;
}
/**
* Calculates the vertical offset between the baseline and the specified
* text anchor.
*
* @param g2 the graphics device.
* @param anchor the anchor.
*
* @return the offset.
*/
public float calculateBaselineOffset(Graphics2D g2, TextAnchor anchor) {
float result = 0.0f;
FontMetrics fm = g2.getFontMetrics(this.font);
LineMetrics lm = fm.getLineMetrics("ABCxyz", g2);
if (anchor == TextAnchor.TOP_LEFT || anchor == TextAnchor.TOP_CENTER
|| anchor == TextAnchor.TOP_RIGHT) {
result = lm.getAscent();
}
else if (anchor == TextAnchor.BOTTOM_LEFT
|| anchor == TextAnchor.BOTTOM_CENTER
|| anchor == TextAnchor.BOTTOM_RIGHT) {
result = -lm.getDescent() - lm.getLeading();
}
return result;
}
private double drawHeaderOrFooterLine(Graphics2D g, double x, double y, double w, String headerText,
String alignment) {
headerText = convertHeaderText(headerText);
g.setFont(myHeaderFont);
g.setColor(Color.black);
FontRenderContext fontRenderContext = g.getFontRenderContext();
LineMetrics lineMetrics = getHeaderFooterLineMetrics(g);
float lineHeight = lineMetrics.getHeight();
float descent = lineMetrics.getDescent();
double width = myHeaderFont.getStringBounds(headerText, fontRenderContext).getWidth() + getCharWidth(g);
float yPos = (float) (lineHeight - descent + y);
if (PrintSettings.LEFT.equals(alignment)) {
drawStringToGraphics(g, headerText, x, yPos);
} else if (PrintSettings.CENTER.equals(alignment)) {
drawStringToGraphics(g, headerText, (float) (x + (w - width) / 2), yPos);
} else if (PrintSettings.RIGHT.equals(alignment)) {
drawStringToGraphics(g, headerText, (float) (x + w - width), yPos);
}
return lineHeight;
}
/**
* A utility method that calculates the anchor offsets for a string.
* Normally, the {@code (x, y)} coordinate for drawing text is a point on
* the baseline at the left of the text string. If you add these offsets
* to {@code (x, y)} and draw the string, then the anchor point should
* coincide with the {@code (x, y)} point.
*
* @param g2 the graphics device (not {@code null}).
* @param text the text.
* @param anchor the anchor point ({@code null} not permitted).
*
* @return The offsets.
*/
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor) {
float[] result = new float[2];
FontRenderContext frc = g2.getFontRenderContext();
Font f = g2.getFont();
FontMetrics fm = g2.getFontMetrics(f);
Rectangle2D bounds = getTextBounds(text, fm);
LineMetrics metrics = f.getLineMetrics(text, frc);
float ascent = metrics.getAscent();
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor.isHorizontalCenter()) {
xAdj = (float) -bounds.getWidth() / 2.0f;
} else if (anchor.isRight()) {
xAdj = (float) -bounds.getWidth();
}
if (anchor.isTop()) {
yAdj = -descent - leading + (float) bounds.getHeight();
} else if (anchor.isHalfAscent()) {
yAdj = halfAscent;
} else if (anchor.isHalfHeight()) {
yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
} else if (anchor.isBaseline()) {
yAdj = 0.0f;
} else if (anchor.isBottom()) {
yAdj = -metrics.getDescent() - metrics.getLeading();
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}
private void calcImageBufferSize() {
GraphicsConfiguration config = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice()
.getDefaultConfiguration();
BufferedImage buff = config.createCompatibleImage(1, 1, Transparency.TRANSLUCENT);
Graphics2D g2 = buff.createGraphics();
g2.setFont(font);
LineMetrics lm = font.getLineMetrics(String.valueOf(icon), g2.getFontRenderContext());
iconWidth = g2.getFontMetrics().charWidth(icon.getChar());
iconHeight = (int) lm.getHeight();
iconBaseline = (int) (lm.getHeight() - lm.getLeading() - lm.getDescent());
g2.dispose();
}
protected void paintText(Graphics2D g, GeneralPath bodyOutline) {
Font font = getFont();
String text = getText();
g.setFont(font);
FontRenderContext frc = g.getFontRenderContext();
Rectangle2D r = font.getStringBounds(text, frc);
LineMetrics lineMetrics = font.getLineMetrics(text, frc);
Rectangle2D shapeBounds = ShapeBounds.getBounds(bodyOutline);
float shapeCenterX = (float) shapeBounds.getCenterX();
float shapeCenterY = (float) shapeBounds.getCenterY();
float textX = (float) (shapeCenterX - r.getWidth() / 2f);
float textY = (float) (shapeCenterY + lineMetrics.getAscent() / 2f - lineMetrics
.getDescent() / 3f);
if (isTextShadowActive()) {
Paint paint = this.getTextPaint();
boolean isTextDark = true;
if (paint instanceof Color) {
Color color = (Color) paint;
isTextDark = (color.getRed() + color.getGreen() + color
.getBlue()) / 3 < 120;
}
g.setColor(isTextDark ? new Color(255, 255, 255, 40) : new Color(0,
0, 0, 40));
g.translate(0, 1);
g.drawString(text, textX, textY);
g.translate(0, 1);
g.drawString(text, textX, textY);
g.translate(0, -2);
}
g.setPaint(getTextPaint());
g.drawString(text, textX, textY);
}
/**
* A utility method that calculates the anchor offsets for a string.
* Normally, the (x, y) coordinate for drawing text is a point on the
* baseline at the left of the text string. If you add these offsets to
* (x, y) and draw the string, then the anchor point should coincide with
* the (x, y) point.
*
* @param g2 the graphics device (not <code>null</code>).
* @param text the text.
* @param anchor the anchor point.
* @param textBounds the text bounds (if not <code>null</code>, this
* object will be updated by this method to match the
* string bounds).
*
* @return The offsets.
*/
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor, Rectangle2D textBounds) {
float[] result = new float[3];
FontRenderContext frc = g2.getFontRenderContext();
Font f = g2.getFont();
FontMetrics fm = g2.getFontMetrics(f);
Rectangle2D bounds = getTextBounds(text, fm);
LineMetrics metrics = f.getLineMetrics(text, frc);
float ascent = metrics.getAscent();
result[2] = -ascent;
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor.isHorizontalCenter()) {
xAdj = (float) -bounds.getWidth() / 2.0f;
}
else if (anchor.isRight()) {
xAdj = (float) -bounds.getWidth();
}
if (anchor.isTop()) {
yAdj = -descent - leading + (float) bounds.getHeight();
}
else if (anchor.isHalfAscent()) {
yAdj = halfAscent;
}
else if (anchor.isHorizontalCenter()) {
yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
}
else if (anchor.isBaseline()) {
yAdj = 0.0f;
}
else if (anchor.isBottom()) {
yAdj = -metrics.getDescent() - metrics.getLeading();
}
if (textBounds != null) {
textBounds.setRect(bounds);
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}
/**
* A utility method that calculates the anchor offsets for a string.
* Normally, the (x, y) coordinate for drawing text is a point on the
* baseline at the left of the text string. If you add these offsets to
* (x, y) and draw the string, then the anchor point should coincide with
* the (x, y) point.
*
* @param g2 the graphics device (not <code>null</code>).
* @param text the text.
* @param anchor the anchor point.
*
* @return The offsets.
*/
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor) {
float[] result = new float[2];
FontRenderContext frc = g2.getFontRenderContext();
Font f = g2.getFont();
FontMetrics fm = g2.getFontMetrics(f);
Rectangle2D bounds = getTextBounds(text, fm);
LineMetrics metrics = f.getLineMetrics(text, frc);
float ascent = metrics.getAscent();
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor.isHorizontalCenter()) {
xAdj = (float) -bounds.getWidth() / 2.0f;
}
else if (anchor.isRight()) {
xAdj = (float) -bounds.getWidth();
}
if (anchor.isTop()) {
yAdj = -descent - leading + (float) bounds.getHeight();
}
else if (anchor.isHalfAscent()) {
yAdj = halfAscent;
}
else if (anchor.isVerticalCenter()) {
yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
}
else if (anchor.isBaseline()) {
yAdj = 0.0f;
}
else if (anchor.isBottom()) {
yAdj = -metrics.getDescent() - metrics.getLeading();
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}
/**
* A utility method that calculates the anchor offsets for a string.
* Normally, the (x, y) coordinate for drawing text is a point on the
* baseline at the left of the text string. If you add these offsets to
* (x, y) and draw the string, then the anchor point should coincide with
* the (x, y) point.
*
* @param g2 the graphics device (not <code>null</code>).
* @param text the text.
* @param anchor the anchor point.
* @param textBounds the text bounds (if not <code>null</code>, this
* object will be updated by this method to match the
* string bounds).
*
* @return The offsets.
*/
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor, Rectangle2D textBounds) {
float[] result = new float[3];
FontRenderContext frc = g2.getFontRenderContext();
Font f = g2.getFont();
FontMetrics fm = g2.getFontMetrics(f);
Rectangle2D bounds = getTextBounds(text, fm);
LineMetrics metrics = f.getLineMetrics(text, frc);
float ascent = metrics.getAscent();
result[2] = -ascent;
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor.isHorizontalCenter()) {
xAdj = (float) -bounds.getWidth() / 2.0f;
}
else if (anchor.isRight()) {
xAdj = (float) -bounds.getWidth();
}
if (anchor.isTop()) {
yAdj = -descent - leading + (float) bounds.getHeight();
}
else if (anchor.isHalfAscent()) {
yAdj = halfAscent;
}
else if (anchor.isHorizontalCenter()) {
yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
}
else if (anchor.isBaseline()) {
yAdj = 0.0f;
}
else if (anchor.isBottom()) {
yAdj = -metrics.getDescent() - metrics.getLeading();
}
if (textBounds != null) {
textBounds.setRect(bounds);
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}
/**
* A utility method that calculates the rotation anchor offsets for a
* string. These offsets are relative to the text starting coordinate
* (BASELINE_LEFT).
*
* @param g2 the graphics device.
* @param text the text.
* @param anchor the anchor point.
*
* @return The offsets.
*/
private static float[] deriveRotationAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor) {
float[] result = new float[2];
FontRenderContext frc = g2.getFontRenderContext();
LineMetrics metrics = g2.getFont().getLineMetrics(text, frc);
FontMetrics fm = g2.getFontMetrics();
Rectangle2D bounds = TextUtilities.getTextBounds(text, g2, fm);
float ascent = metrics.getAscent();
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor == TextAnchor.TOP_LEFT
|| anchor == TextAnchor.CENTER_LEFT
|| anchor == TextAnchor.BOTTOM_LEFT
|| anchor == TextAnchor.BASELINE_LEFT
|| anchor == TextAnchor.HALF_ASCENT_LEFT) {
xAdj = 0.0f;
}
else if (anchor == TextAnchor.TOP_CENTER
|| anchor == TextAnchor.CENTER
|| anchor == TextAnchor.BOTTOM_CENTER
|| anchor == TextAnchor.BASELINE_CENTER
|| anchor == TextAnchor.HALF_ASCENT_CENTER) {
xAdj = (float) bounds.getWidth() / 2.0f;
}
else if (anchor == TextAnchor.TOP_RIGHT
|| anchor == TextAnchor.CENTER_RIGHT
|| anchor == TextAnchor.BOTTOM_RIGHT
|| anchor == TextAnchor.BASELINE_RIGHT
|| anchor == TextAnchor.HALF_ASCENT_RIGHT) {
xAdj = (float) bounds.getWidth();
}
if (anchor == TextAnchor.TOP_LEFT
|| anchor == TextAnchor.TOP_CENTER
|| anchor == TextAnchor.TOP_RIGHT) {
yAdj = descent + leading - (float) bounds.getHeight();
}
else if (anchor == TextAnchor.CENTER_LEFT
|| anchor == TextAnchor.CENTER
|| anchor == TextAnchor.CENTER_RIGHT) {
yAdj = descent + leading - (float) (bounds.getHeight() / 2.0);
}
else if (anchor == TextAnchor.HALF_ASCENT_LEFT
|| anchor == TextAnchor.HALF_ASCENT_CENTER
|| anchor == TextAnchor.HALF_ASCENT_RIGHT) {
yAdj = -halfAscent;
}
else if (anchor == TextAnchor.BASELINE_LEFT
|| anchor == TextAnchor.BASELINE_CENTER
|| anchor == TextAnchor.BASELINE_RIGHT) {
yAdj = 0.0f;
}
else if (anchor == TextAnchor.BOTTOM_LEFT
|| anchor == TextAnchor.BOTTOM_CENTER
|| anchor == TextAnchor.BOTTOM_RIGHT) {
yAdj = metrics.getDescent() + metrics.getLeading();
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}
/**
* A utility method that calculates the anchor offsets for a string.
* Normally, the (x, y) coordinate for drawing text is a point on the
* baseline at the left of the text string. If you add these offsets to
* (x, y) and draw the string, then the anchor point should coincide with
* the (x, y) point.
*
* @param g2 the graphics device (not <code>null</code>).
* @param text the text.
* @param anchor the anchor point.
* @param textBounds the text bounds (if not <code>null</code>, this
* object will be updated by this method to match the
* string bounds).
*
* @return The offsets.
*/
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor, Rectangle2D textBounds) {
float[] result = new float[3];
FontRenderContext frc = g2.getFontRenderContext();
Font f = g2.getFont();
FontMetrics fm = g2.getFontMetrics(f);
Rectangle2D bounds = getTextBounds(text, fm);
LineMetrics metrics = f.getLineMetrics(text, frc);
float ascent = metrics.getAscent();
result[2] = -ascent;
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor.isHorizontalCenter()) {
xAdj = (float) -bounds.getWidth() / 2.0f;
}
else if (anchor.isRight()) {
xAdj = (float) -bounds.getWidth();
}
if (anchor.isTop()) {
yAdj = -descent - leading + (float) bounds.getHeight();
}
else if (anchor.isHalfAscent()) {
yAdj = halfAscent;
}
else if (anchor.isHorizontalCenter()) {
yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
}
else if (anchor.isBaseline()) {
yAdj = 0.0f;
}
else if (anchor.isBottom()) {
yAdj = -metrics.getDescent() - metrics.getLeading();
}
if (textBounds != null) {
textBounds.setRect(bounds);
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}
double getFontHeight(Font font) {
LineMetrics lm = font.getLineMetrics(DUMMY_TEXT, gd.getFontRenderContext());
return lm.getAscent() + lm.getDescent();
}
/**
* A utility method that calculates the anchor offsets for a string.
* Normally, the (x, y) coordinate for drawing text is a point on the
* baseline at the left of the text string. If you add these offsets to
* (x, y) and draw the string, then the anchor point should coincide with
* the (x, y) point.
*
* @param g2 the graphics device (not <code>null</code>).
* @param text the text.
* @param anchor the anchor point.
*
* @return The offsets.
*/
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor) {
float[] result = new float[2];
FontRenderContext frc = g2.getFontRenderContext();
Font f = g2.getFont();
FontMetrics fm = g2.getFontMetrics(f);
Rectangle2D bounds = TextUtilities.getTextBounds(text, g2, fm);
LineMetrics metrics = f.getLineMetrics(text, frc);
float ascent = metrics.getAscent();
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor.isHorizontalCenter()) {
xAdj = (float) -bounds.getWidth() / 2.0f;
}
else if (anchor.isRight()) {
xAdj = (float) -bounds.getWidth();
}
if (anchor.isTop()) {
yAdj = -descent - leading + (float) bounds.getHeight();
}
else if (anchor.isHalfAscent()) {
yAdj = halfAscent;
}
else if (anchor.isVerticalCenter()) {
yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
}
else if (anchor.isBaseline()) {
yAdj = 0.0f;
}
else if (anchor.isBottom()) {
yAdj = -metrics.getDescent() - metrics.getLeading();
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}
/**
* A utility method that calculates the rotation anchor offsets for a
* string. These offsets are relative to the text starting coordinate
* (<code>BASELINE_LEFT</code>).
*
* @param g2 the graphics device.
* @param text the text.
* @param anchor the anchor point.
*
* @return The offsets.
*/
private static float[] deriveRotationAnchorOffsets(Graphics2D g2,
String text, TextAnchor anchor) {
float[] result = new float[2];
FontRenderContext frc = g2.getFontRenderContext();
LineMetrics metrics = g2.getFont().getLineMetrics(text, frc);
FontMetrics fm = g2.getFontMetrics();
Rectangle2D bounds = TextUtilities.getTextBounds(text, g2, fm);
float ascent = metrics.getAscent();
float halfAscent = ascent / 2.0f;
float descent = metrics.getDescent();
float leading = metrics.getLeading();
float xAdj = 0.0f;
float yAdj = 0.0f;
if (anchor.isLeft()) {
xAdj = 0.0f;
}
else if (anchor.isHorizontalCenter()) {
xAdj = (float) bounds.getWidth() / 2.0f;
}
else if (anchor.isRight()) {
xAdj = (float) bounds.getWidth();
}
if (anchor.isTop()) {
yAdj = descent + leading - (float) bounds.getHeight();
}
else if (anchor.isVerticalCenter()) {
yAdj = descent + leading - (float) (bounds.getHeight() / 2.0);
}
else if (anchor.isHalfAscent()) {
yAdj = -halfAscent;
}
else if (anchor.isBaseline()) {
yAdj = 0.0f;
}
else if (anchor.isBottom()) {
yAdj = metrics.getDescent() + metrics.getLeading();
}
result[0] = xAdj;
result[1] = yAdj;
return result;
}