/**
* The printing interface.
*
* @param g the graphic context.
* @param pf the page format.
* @param page the page number.
* @return PAGE_EXISTS if the page has to be printed.
* @throws PrinterException if a printing error occurs.
*/
public int print(Graphics g, PageFormat pf, int page) throws PrinterException {
int npages = 0;
// This might be explained as follows:
// 1 - The Java printing system normally works with an internal
// resolution which is 72 dpi (probably inspired by Postscript).
// 2 - To have a sufficient resolution, this is increased by 16 times,
// by using the scale method of the graphic object associated to the
// printer. This gives a 72 dpi * 16=1152 dpi resolution.
// 3 - The 0.127 mm pitch used in FidoCadJ corresponds to a 200 dpi
// resolution. Calculating 1152 dpi / 200 dpi gives the 5.76 constant
double xscale = 1.0 / 16; // Set 1152 logical units for an inch
double yscale = 1.0 / 16; // as the standard resolution is 72
double zoom = 5.76; // act in a 1152 dpi resolution as 1:1
Graphics2D g2d = (Graphics2D) g;
// User (0,0) is typically outside the imageable area, so we must
// translate by the X and Y values in the PageFormat to avoid clipping
if (printMirror) {
g2d.translate(pf.getImageableX() + pf.getImageableWidth(), pf.getImageableY());
g2d.scale(-xscale, yscale);
} else {
g2d.translate(pf.getImageableX(), pf.getImageableY());
g2d.scale(xscale, yscale);
}
int printerWidth = (int) pf.getImageableWidth() * 16;
// Perform an adjustement if we need to fit the drawing to the page.
if (printFitToPage) {
MapCoordinates zoomm =
DrawingSize.calculateZoomToFit(
cc.dmp, (int) pf.getImageableWidth() * 16, (int) pf.getImageableHeight() * 16, false);
zoom = zoomm.getXMagnitude();
}
MapCoordinates m = new MapCoordinates();
m.setMagnitudes(zoom, zoom);
PointG o = new PointG(0, 0);
int imageWidth = DrawingSize.getImageSize(cc.dmp, zoom, false, o).width;
npages = (int) Math.floor((imageWidth - 1) / (double) printerWidth);
// Check if we need more than one page
if (printerWidth < imageWidth) {
g2d.translate(-(printerWidth * page), 0);
}
// Check if printing is finished.
if (page > npages) {
return NO_SUCH_PAGE;
}
// Now we perform our rendering
cc.drawingAgent.draw(new Graphics2DSwing(g2d), m);
/* tell the caller that this page is part of the printed document */
return PAGE_EXISTS;
}
