下面列出了java.awt.FontMetrics#getLineMetrics ( ) 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。
/**
* 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;
final FontMetrics fm = g2.getFontMetrics(this.font);
final LineMetrics lm = fm.getLineMetrics("ABCxyz", g2);
if (anchor.isTop()) {
result = lm.getAscent();
}
else if (anchor.isHalfAscent()) {
result = lm.getAscent() / 2.0f;
}
else if (anchor.isVerticalCenter()) {
result = lm.getAscent() / 2.0f - lm.getDescent() / 2.0f;
}
else if (anchor.isBottom()) {
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;
}
/**
* 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;
}
@Override
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
if (g2 == null) {
return;
}
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// g2.setRenderingHint(RenderingHints.KEY_RENDERING,
// RenderingHints.VALUE_RENDER_QUALITY);
int sweep_angle = (int)(((float)value * 360) / 100);
g2.setColor(Color.GRAY);
g2.setStroke(stroke);
g2.drawArc(padding, padding, getWidth() - 2 * padding, getHeight() - 2
* padding, getScaledInt(90), -360);
// g2.drawArc(2, 2, getWidth() - 12, getHeight() - 12, 90, -360);
if (value > 0) {
g2.setColor(foreColor);
// g2.drawArc(2, 2, getWidth() - 12, getHeight() - 12, 90,
// -sweep_angle);
g2.drawArc(padding, padding, getWidth() - 2 * padding, getHeight()
- 2 * padding, getScaledInt(90), -sweep_angle);
}
g2.setFont(FontResource.getItemFont());
FontMetrics fm = g2.getFontMetrics();
String str = value + "%";
int w = (int) fm.getStringBounds(str, g2).getWidth();// fm.stringWidth(str);
LineMetrics lm = fm.getLineMetrics(str, g2);
int h = (int) (lm.getAscent() + lm.getDescent());
g2.drawString(str, (getWidth() - w) / 2,
((getHeight() + h) / 2) - lm.getDescent());
}
private void drawText(Graphics graphics)
{
GameTreePanel.Label labelMode = m_gameTreePanel.getLabelMode();
if (labelMode == GameTreePanel.Label.NONE)
return;
Move move = m_node.getMove();
int size = m_gameTreePanel.getNodeSize();
String text;
if (labelMode == GameTreePanel.Label.MOVE)
{
if (move.getPoint() == null)
return;
text = move.getPoint().toString();
}
else
text = Integer.toString(m_moveNumber);
FontMetrics fontMetrics = graphics.getFontMetrics();
LineMetrics lineMetrics = fontMetrics.getLineMetrics(text, graphics);
int textWidth = fontMetrics.stringWidth(text);
int ascent = (int)lineMetrics.getAscent();
int xText = (size - textWidth) / 2;
int yText = (ascent + size) / 2;
if (move.getColor() == BLACK)
graphics.setColor(Color.white);
else
graphics.setColor(Color.black);
graphics.drawString(text, xText, yText);
}
/**
* Create a new <code>TextSprite</code>
*
* @param text The text to be rendered
* @param textColor Color of the text
* @return TextSprite with the wanted text
*/
public static TextSprite createTextSprite(String text, final Color textColor) {
final GraphicsConfiguration gc = getGC();
FontMetrics metrics = graphics.getFontMetrics();
LineMetrics lm = metrics.getLineMetrics(text, graphics);
final Image image = gc.createCompatibleImage(metrics.stringWidth(text)
+ 2, Math.round(lm.getHeight()) + 2, TransparencyMode.TRANSPARENCY);
drawOutlineString(image, textColor, text, 1, Math.round(lm.getAscent()));
return new TextSprite(image);
}
private void drawLabel(int fieldX, int fieldY, Graphics boardGraphics,
Image boardImage, int boardWidth)
{
setComposite(COMPOSITE_97);
setFont(m_graphics, m_size);
FontMetrics fontMetrics = m_graphics.getFontMetrics();
LineMetrics lineMetrics =
fontMetrics.getLineMetrics(m_label, m_graphics);
int width = fontMetrics.stringWidth(m_label);
int height = fontMetrics.getHeight();
int ascent = (int)lineMetrics.getAscent();
int x = Math.max((m_size - width) / 2, 0);
int y = (ascent + m_size) / 2;
if (m_ghostStone == null)
{
if (m_color == BLACK)
m_graphics.setColor(Color.white);
else
m_graphics.setColor(Color.black);
}
else
{
if (m_ghostStone == BLACK)
m_graphics.setColor(Color.white);
else
m_graphics.setColor(Color.black);
}
Rectangle oldClip = m_graphics.getClipBounds();
width = Math.min(width, (int)(0.95 * m_size));
m_graphics.setClip(x, y - ascent, width, height);
if (m_color == EMPTY && m_ghostStone == null)
{
Rectangle oldBoardClip = boardGraphics.getClipBounds();
boardGraphics.setClip(fieldX + x, fieldY + y - ascent,
width, height);
boardGraphics.drawImage(boardImage, 0, 0, boardWidth, boardWidth,
null);
if (m_fieldColor != null)
drawFieldColor();
boardGraphics.setClip(oldBoardClip);
m_graphics.setColor(Color.black);
}
m_graphics.drawString(m_label, x, y);
m_graphics.setClip(oldClip);
}