LandscapeStackOverflow.java 文件源码

public int print( Graphics graphics, PageFormat format, int index ) {
    Graphics2D g2d = (Graphics2D)graphics;

    double scalex = g2d.getTransform().getScaleX();
    double scaley = g2d.getTransform().getScaleY();

    double centerx = ( format.getImageableX() +
                     ( format.getImageableWidth() / 2 ) ) * scalex;
    double centery = ( format.getImageableY() +
                     ( format.getImageableHeight() / 2 ) ) * scaley;

    // The following 2 lines cause an error when printing in landscape.
    g2d.scale( 1 / scalex, 1 / scaley );
    g2d.translate( centerx, centery );

    Path2D.Double path = new Path2D.Double();
    path.moveTo( -scalex * 72, -scaley * 72 );
    path.lineTo( -scalex * 72, scaley * 72 );
    path.lineTo( scalex * 72, scaley * 72 );
    path.lineTo( scalex * 72, -scaley * 72 );
    path.closePath();

    g2d.draw( path );

    return index == 0 ? PAGE_EXISTS : NO_SUCH_PAGE;
}