Example usage for java.awt FontMetrics getMaxCharBounds

Introduction

In this page you can find the example usage for java.awt FontMetrics getMaxCharBounds.

Prototype

public Rectangle2D getMaxCharBounds(Graphics context) 

Source Link

Document

Returns the bounds for the character with the maximum bounds in the specified Graphics context.

Usage

From source file:org.pentaho.reporting.engine.classic.core.modules.output.pageable.graphics.internal.LogicalPageDrawable.java

/**
 * Renders the glyphs stored in the text node.
 *
 * @param renderableText/*from w  w w .j a v a  2 s.  co  m*/
 *          the text node that should be rendered.
 * @param contentX2
 */
protected void drawText(final RenderableText renderableText, final long contentX2) {
    if (renderableText.getLength() == 0) {
        // This text is empty.
        return;
    }

    final long posX = renderableText.getX();
    final long posY = renderableText.getY();

    final Graphics2D g2;
    if (getTextSpec() == null) {
        g2 = (Graphics2D) getGraphics().create();
        final StyleSheet layoutContext = renderableText.getStyleSheet();
        configureGraphics(layoutContext, g2);
        g2.setStroke(LogicalPageDrawable.DEFAULT_STROKE);

        if (RenderUtility.isFontSmooth(layoutContext, metaData)) {
            g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        } else {
            g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
        }
    } else {
        g2 = getTextSpec().getGraphics();
    }

    // This shifting is necessary to make sure that all text is rendered like in the previous versions.
    // In the earlier versions, we did not really obey to the baselines of the text, we just hoped and prayed.
    // Therefore, all text was printed at the bottom of the text elements. With the introduction of the full
    // font metrics setting, this situation got a little bit better, for the price that text-elements became
    // nearly unpredictable ..
    //
    // The code below may be weird, but at least it is predictable weird.

    final FontMetrics fm = g2.getFontMetrics();
    final Rectangle2D rect = fm.getMaxCharBounds(g2);
    final long awtBaseLine = StrictGeomUtility.toInternalValue(-rect.getY());

    final GlyphList gs = renderableText.getGlyphs();
    if (metaData.isFeatureSupported(OutputProcessorFeature.FAST_FONTRENDERING)
            && isNormalTextSpacing(renderableText)) {
        final int maxLength = renderableText.computeMaximumTextSize(contentX2);
        final String text = gs.getText(renderableText.getOffset(), maxLength, codePointBuffer);
        final float y = (float) StrictGeomUtility.toExternalValue(posY + awtBaseLine);
        g2.drawString(text, (float) StrictGeomUtility.toExternalValue(posX), y);
    } else {
        final ExtendedBaselineInfo baselineInfo = renderableText.getBaselineInfo();
        final int maxPos = renderableText.getOffset() + renderableText.computeMaximumTextSize(contentX2);
        long runningPos = posX;
        final long baseline = baselineInfo.getBaseline(baselineInfo.getDominantBaseline());
        final long baselineDelta = awtBaseLine - baseline;
        final float y = (float) (StrictGeomUtility.toExternalValue(posY + awtBaseLine + baselineDelta));
        for (int i = renderableText.getOffset(); i < maxPos; i++) {
            final Glyph g = gs.getGlyph(i);
            g2.drawString(gs.getGlyphAsString(i, codePointBuffer),
                    (float) StrictGeomUtility.toExternalValue(runningPos), y);
            runningPos += RenderableText.convert(g.getWidth()) + g.getSpacing().getMinimum();
        }
    }
    g2.dispose();
}

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