package ij.util;
import ij.*;
import ij.Prefs;
import java.awt.*;
import javax.swing.*;

/**
This class contains static methods that use the Java 2 API. They are isolated 
here to prevent errors when ImageJ is running on Java 1.1 JVMs.
*/
public class Java2 {

    public static void setAntialiased(Graphics g, boolean antialiased) {
            Graphics2D g2d = (Graphics2D)g;
            if (antialiased)
                g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            else
                g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
    }

    public static void setAntialiasedText(Graphics g, boolean antialiasedText) {
            Graphics2D g2d = (Graphics2D)g;
            if (antialiasedText)
                g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
            else
                g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
    }

    public static int getStringWidth(String s, FontMetrics fontMetrics, Graphics g) {
            java.awt.geom.Rectangle2D r = fontMetrics.getStringBounds(s, g);
            return (int)r.getWidth();
    }

    public static void setBilinearInterpolation(Graphics g, boolean bilinearInterpolation) {
            Graphics2D g2d = (Graphics2D)g;
            if (bilinearInterpolation)
                g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            else
                g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);
    }
    
    /** Sets the Swing look and feel to the system look and feel (Windows only). */
    public static void setSystemLookAndFeel() {
        if (!IJ.isWindows())
            return;
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch(Throwable t) {}
    }

    /** Sets the Swing look and feel. */
    public static void setLookAndFeel(LookAndFeel newLookAndFeel) {
        if (!IJ.isWindows() || newLookAndFeel==null)
            return;
        try {
            UIManager.setLookAndFeel(newLookAndFeel);
        } catch(Throwable t) {}
    }
    
    /** Returns the current Swing look and feel or null. */
    public static LookAndFeel getLookAndFeel() {
        if (!IJ.isWindows())
            return null;
        return UIManager.getLookAndFeel();
    }


}