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|Home ChartPack RChart Class TRChart Methods CopyToOpenPrinter|
|See also: PrintIt, CopyToWMF|
The method CopyToOpenPrinter is a more flexible alternative to the method PrintIt. It provides a way to create a graphical output on the currently selected printer. You may change the selected printer by assigning a proper value to the PrinterIndex property of the Printer object before calling CopyToOpenPrinter. In contrast to PrintIt, the user has to take care by himself that the printer object is already open for receiving data. This can be accomplished either by the method Printer.BeginDoc (see Delphi manual for details), or by assigning the printer output to a text file (Delphi procedure AssignPrn).
The variable parameters x and y contain the coordinates of the upper left corner of the chart in printer coordinates on entry of the routine, and return the printer coordinates of the lower right corner of the chart after the method is finished. This feature can be used to combine several hardcopies on one page, since the x- and y-values after a first hardcopy can be partly used as inputs of the next hardcopy.
The parameter ScaleF determines the magnification factor of the printout. A factor of 1.0 creates an output which has roughly the size of the screen image (assuming a monitor resolution of 80 dots per inch). If the parameter BlkWhite is set to TRUE, the colors of the chart are suppressed and the chart is printed in black and white. This is normally the best way to proceed with B&W printers.