Examples of java.awt.font.LineMetrics

java.awt.font.LineMetrics
The LineMetrics class allows access to the metrics needed to layout characters along a line and to layout of a set of lines. A LineMetrics object encapsulates the measurement information associated with a run of text.
Fonts can have different metrics for different ranges of characters. The getLineMetrics methods of {@link java.awt.Font Font} take some text as an argumentand return a LineMetrics object describing the metrics of the initial number of characters in that text, as returned by {@link #getNumChars}.

        Separator separator = (Separator)getComponent();
        String heading = separator.getHeading();


        if (heading != null
            && heading.length() > 0) {
            LineMetrics lm = font.getLineMetrics(heading, fontRenderContext);
            preferredHeight = Math.max((int)Math.ceil(lm.getAscent() + lm.getDescent()
                + lm.getLeading()), preferredHeight);
        }


        preferredHeight += (padding.top + padding.bottom);


        return preferredHeight;

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        String heading = separator.getHeading();


        if (heading != null
            && heading.length() > 0) {
            LineMetrics lm = font.getLineMetrics(heading, fontRenderContext);


            if (fontRenderContext.isAntiAliased()) {
                graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
                    Platform.getTextAntialiasingHint());
            }


            if (fontRenderContext.usesFractionalMetrics()) {
                graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
                    RenderingHints.VALUE_FRACTIONALMETRICS_ON);
            }


            graphics.setFont(font);
            graphics.setPaint(headingColor);
            graphics.drawString(heading, padding.left, lm.getAscent() + padding.top);


            Rectangle2D headingBounds = font.getStringBounds(heading, fontRenderContext);


            Area titleClip = new Area(graphics.getClip());
            titleClip.subtract(new Area(new Rectangle2D.Double(padding.left, padding.top,
                headingBounds.getWidth() + padding.right, headingBounds.getHeight())));
            graphics.clip(titleClip);


            separatorY += (lm.getAscent() + lm.getDescent()) / 2 + 1;
        }


        graphics.setStroke(new BasicStroke(thickness));
        graphics.setColor(color);
        graphics.drawLine(0, separatorY, width, separatorY);

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                    height += row.height;
                }


                // Recalculate terminator bounds
                LineMetrics lm = font.getLineMetrics("", 0, 0, FONT_RENDER_CONTEXT);
                int terminatorHeight = (int)Math.ceil(lm.getHeight());


                int terminatorY;
                if (getCharacterCount() == 1) {
                    // The terminator is the only character in this paragraph
                    terminatorY = 0;

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                if (FONT_RENDER_CONTEXT.usesFractionalMetrics()) {
                    graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
                        RenderingHints.VALUE_FRACTIONALMETRICS_ON);
                }


                LineMetrics lm = font.getLineMetrics("", FONT_RENDER_CONTEXT);
                float ascent = lm.getAscent();


                graphics.setFont(font);


                int selectionStart = textArea.getSelectionStart();
                int selectionLength = textArea.getSelectionLength();

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            return next;
        }


        @Override
        public int getInsertionPoint(int x, int y) {
            LineMetrics lm = font.getLineMetrics("", FONT_RENDER_CONTEXT);
            float ascent = lm.getAscent();


            int n = glyphVector.getNumGlyphs();
            int i = 0;


            while (i < n) {

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    @Override
    public int getPreferredHeight(int width) {
        Label label = (Label)getComponent();
        String text = label.getText();


        LineMetrics lm = font.getLineMetrics("", FONT_RENDER_CONTEXT);
        float lineHeight = lm.getHeight();


        float preferredHeight = lineHeight;


        if (text != null
            && wrapText

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            preferredWidth = 0;
        }


        preferredWidth += (padding.left + padding.right);


        LineMetrics lm = font.getLineMetrics("", FONT_RENDER_CONTEXT);
        int preferredHeight = (int)Math.ceil(lm.getHeight()) + (padding.top + padding.bottom);


        return new Dimensions(preferredWidth, preferredHeight);
    }

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        return new Dimensions(preferredWidth, preferredHeight);
    }


    @Override
    public int getBaseline(int width, int height) {
        LineMetrics lm = font.getLineMetrics("", FONT_RENDER_CONTEXT);
        float ascent = lm.getAscent();


        float textHeight;
        if (wrapText) {
            textHeight = Math.max(getPreferredHeight(width) - (padding.top + padding.bottom), 0);
        } else {
            textHeight = (int)Math.ceil(lm.getHeight());
        }


        int baseline = -1;
        switch (verticalAlignment) {
            case TOP: {

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            if (FONT_RENDER_CONTEXT.usesFractionalMetrics()) {
                graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
                    RenderingHints.VALUE_FRACTIONALMETRICS_ON);
            }


            LineMetrics lm = font.getLineMetrics("", FONT_RENDER_CONTEXT);
            float ascent = lm.getAscent();
            float lineHeight = lm.getHeight();


            float y = 0;
            switch (verticalAlignment) {
                case TOP: {
                    y = padding.top;

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        if (title != null
            && title.length() > 0) {
            Rectangle2D headingBounds = font.getStringBounds(title, fontRenderContext);
            preferredWidth = (int)Math.ceil(headingBounds.getWidth());


            LineMetrics lm = font.getLineMetrics(title, fontRenderContext);
            topThickness = Math.max((int)Math.ceil(lm.getHeight()), topThickness);
        }


        Component content = border.getContent();
        if (content != null) {
            if (height != -1) {

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