// The first thing to do before we try to print is build up the header and footer elements. We'll create default ones in the constructor:
public PrintEngine()
{
// create the header...
Header = new PrintElement(null);
Header.AddText("Report");
Header.AddText("Page: [pagenum]");
Header.AddHorizontalRule();
Header.AddBlankLine();
// create the footer...
Footer = new PrintElement(null);
Footer.AddBlankLine();
Footer.AddHorizontalRule();
Footer.AddText("Confidential");
}
public void Print(PrintElement element)
{
// tell the engine to draw a header...
element.AddHeader("Customer");
// now, draw the data...
element.AddData("Customer ID", Id.ToString());
element.AddData("Name", FirstName + " " + LastName);
element.AddData("Company", Company);
element.AddData("E-mail", Email);
element.AddData("Phone", Phone);
// finally, add a blank line...
element.AddBlankLine();
}
public void Print(PrintElement element)
{
// tell the engine to draw a header...
element.AddHeader("Contents of List");
// now, draw the data...
element.AddData("Book Nbr", bookNumber);
element.AddData("Title", title);
element.AddData("ISBN", ISBN);
element.AddData("Location", location);
element.AddData("Price", price);
element.AddData("Status", status);
// finally, add a blank line...
element.AddBlankLine();
}
// The printing routines have a fairly curious way of working, which I mentioned right at the beginning involved firing events to signal when a page needs to be printed.
// The first event that gets fired is BeginPrint, but as PrintEngine is inherited from PrintDocument the best way to get at this is to override OnBeginPrint.
// This is, I'm told, similar to the way that the printing routines in MFC worked.
// OnBeginPrint - called when printing starts
protected override void OnBeginPrint(PrintEventArgs e)
{
// reset...
_printElements = new ArrayList();
_pageNum = 0;
_printIndex = 0;
// go through the objects in the list and create print elements for each one...
foreach (IPrintable printObject in _printObjects)
{
// create an element...
PrintElement element = new PrintElement(printObject);
_printElements.Add(element);
// tell it to print...
printObject.Print(element);
}
}
public void Print(PrintElement element)
{
element.AddText(text);
}
