draw Centered String - Java java.awt

Java examples for java.awt:Graphics2D

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Description

draw Centered String

Demo Code


import org.apache.log4j.Logger;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
import java.util.*;
import java.util.regex.Pattern;

public class Main{
    public static final void drawCenteredString(Graphics2D g,
            String string, Font font, float centerX, float centerY) {
        float x = getCenteringStartX(g, string, font, centerX);
        float y = getCenteringStartY(g, string, font, centerY);
        drawString(g, string, font, x, y);
    }//ww  w.j  a  v a2 s. co m
    public static final float getCenteringStartX(Graphics2D g,
            String string, Font font, float centerX) {
        float textWidth = getTextWidth(g, string, font);
        return centerX - (textWidth / 2);
    }
    public static final float getCenteringStartY(Graphics2D g,
            String string, Font font, float centerY) {
        float textHeight = getTextHeight(g, string, font);
        return centerY - (textHeight / 2);
    }
    public static final float drawString(Graphics2D g, String string,
            Font font, float x, float y) {
        g.setFont(font);
        y += font.getLineMetrics(string, g.getFontRenderContext())
                .getAscent();
        g.drawString(string, x, y);
        return getTextHeight(g, string, font);
    }
    public static final float getTextWidth(Graphics2D g, String string,
            Font font) {
        return g.getFontMetrics(font).stringWidth(string);
    }
    public static final float getTextHeight(Graphics2D g, String string,
            Font font) {
        LineMetrics lm = font.getLineMetrics(string,
                g.getFontRenderContext());
        return lm.getHeight();
    }
}

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