本文整理汇总了Java中javax.swing.text.JTextComponent.getFontMetrics方法的典型用法代码示例。如果您正苦于以下问题：Java JTextComponent.getFontMetrics方法的具体用法？Java JTextComponent.getFontMetrics怎么用？Java JTextComponent.getFontMetrics使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类javax.swing.text.JTextComponent的用法示例。
在下文中一共展示了JTextComponent.getFontMetrics方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getSingleLineTextBaseline
import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
/**
* Returns the baseline for single line text components, like
* <code>JTextField</code>.
*/
private static int getSingleLineTextBaseline(JTextComponent textComponent,
int h) {
View rootView = textComponent.getUI().getRootView(textComponent);
if (rootView.getViewCount() > 0) {
Insets insets = textComponent.getInsets();
int height = h - insets.top - insets.bottom;
int y = insets.top;
View fieldView = rootView.getView(0);
int vspan = (int)fieldView.getPreferredSpan(View.Y_AXIS);
if (height != vspan) {
int slop = height - vspan;
y += slop / 2;
}
FontMetrics fm = textComponent.getFontMetrics(
textComponent.getFont());
y += fm.getAscent();
return y;
}
return -1;
}
示例2: FontInfo
import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
FontInfo(Font origFont, JTextComponent textComponent, FontRenderContext frc, float rowHeightCorrection, int textZoom) {
renderFont = (textZoom != 0)
? new Font(origFont.getName(), origFont.getStyle(), Math.max(origFont.getSize() + textZoom, 1))
: origFont;
char defaultChar = 'A';
String defaultCharText = String.valueOf(defaultChar);
TextLayout defaultCharTextLayout = new TextLayout(defaultCharText, renderFont, frc); // NOI18N
TextLayout rowHeightTextLayout = new TextLayout("A_|B", renderFont, frc);
// Round the ascent to eliminate long mantissa without any visible effect on rendering.
updateRowHeight(rowHeightTextLayout, rowHeightCorrection);
// Ceil fractions to whole numbers since this measure may be used for background rendering
charWidth = (float) Math.ceil(defaultCharTextLayout.getAdvance());
LineMetrics lineMetrics = renderFont.getLineMetrics(defaultCharText, frc);
underlineAndStrike[0] = lineMetrics.getUnderlineOffset() * rowHeightCorrection;
underlineAndStrike[1] = lineMetrics.getUnderlineThickness();
underlineAndStrike[2] = lineMetrics.getStrikethroughOffset() * rowHeightCorrection;
underlineAndStrike[3] = lineMetrics.getStrikethroughThickness();
if (LOG.isLoggable(Level.FINE)) {
FontMetrics fm = textComponent.getFontMetrics(origFont); // From original font
LOG.fine("Orig Font=" + origFont + // NOI18N
"\n " + this + ", charWidth=" + charWidth + ", textZoom=" + textZoom + // NOI18N
"\n rowHeightCorrection=" + rowHeightCorrection + // NOI18N
", underlineO/T=" + underlineAndStrike[0] + "/" + underlineAndStrike[1] + // NOI18N
", strikethroughO/T=" + underlineAndStrike[2] + "/" + underlineAndStrike[3] + // NOI18N
"\n FontMetrics (for comparison; without-RHC): fm-line-height=" + fm.getHeight() + // NOI18N
", fm-ascent,descent,leading=" + fm.getAscent() + "," + fm.getDescent() + "," + fm.getLeading() + // NOI18N
"\n"); // NOI18N
if (LOG.isLoggable(Level.FINEST)) {
LOG.log(Level.FINEST, "FontInfo creation stacktrace", new Exception()); // NOI18N
}
}
}