GetBarcodeWidth Return Value

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   It appears that the return value of GetBarcodeWidth does NOT respect the current SetMeasurementUnits setting, although the Nominal Width value appears to work.
Is this correct?

Edited by btmi - 23 Sep 13 at 11:48PM

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btmi Members Profile Find Members Posts Beginner Joined: 08 Feb 06 Location: Australia Status: Offline Points: 3	Post Options Post Reply Quote btmi Report Post Thanks(0) Quote Reply Topic: GetBarcodeWidth Return Value Posted: 23 Sep 13 at 11:47PM
	It appears that the return value of GetBarcodeWidth does NOT respect the current SetMeasurementUnits setting, although the Nominal Width value appears to work. Is this correct? Edited by btmi - 23 Sep 13 at 11:48PM

Gio Members Profile Find Members Posts Beginner Joined: 23 Aug 13 Location: Italy Status: Offline Points: 8	Post Options Post Reply Quote Gio Report Post Thanks(0) Quote Reply Posted: 01 Oct 13 at 9:10AM
	I have the same problem and cannot understand the return valued that is much bigger than the expected one... I have many doubts also concerning the "nominal width": can somebody explain me its meaning/usage? Thank you, Giorgio

btmi Members Profile Find Members Posts Beginner Joined: 08 Feb 06 Location: Australia Status: Offline Points: 3	Post Options Post Reply Quote btmi Report Post Thanks(0) Quote Reply Posted: 02 Oct 13 at 12:11AM
	From my experience the return value is in points (1/72 of an inch) and so you may need to apply some calculations to convert it into your preferred unit of measurement. For the NominalWidth I use 1mm and that seems to work with with all of the devices I use to provide a width that will work with the DrawBarcode routine.

Gio Members Profile Find Members Posts Beginner Joined: 23 Aug 13 Location: Italy Status: Offline Points: 8	Post Options Post Reply Quote Gio Report Post Thanks(0) Quote Reply Posted: 02 Oct 13 at 9:17AM
	Hi btmi and thank you. It doesn't seem to be measured in points because, if applied as width in the DrawBarcode, the returned value should "oversize" the barcode even if "points" are the current unit of measure... But independently by the correct value: which is the meaning of NominalWidth parameter? Giorgio

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 02 Oct 13 at 1:29PM
	Hello, When you call DrawBarcode you specify a left, top, width and height parameter. When the barcode is drawn it is scaled to squeeze or stretch all of the bars into the required width. After it is drawn it is no longer a barcode but just a sequence of lines. You cannot obtain the width. For variable length barcode is it handy to know the number or thin bars the barcode is in width so that you can calculate the width value. You may want to try the following code to see visually what I mean. If you use GetBarcodeWidth to scale the Width parameter for the DrawBarcode funvtion then the thinnest bar in each of the top 4 barcode is the same width. The last 4 barcodes are scaled. double y = 50; QP.SetOrigin(1); QP.DrawBarcode(20, y, QP.GetBarcodeWidth(1, "1", 1), 30, "1", 1, 0); y += 50; QP.DrawBarcode(20, y, QP.GetBarcodeWidth(1, "12", 1), 30, "12", 1, 0); y += 50; QP.DrawBarcode(20, y, QP.GetBarcodeWidth(1, "123", 1), 30, "123", 1, 0); y += 50; QP.DrawBarcode(20, y, QP.GetBarcodeWidth(1, "1234", 1), 30, "1234", 1, 0); y += 50; QP.DrawBarcode(20, y, 50, 30, "1", 1, 0); y += 50; QP.DrawBarcode(20, y, 50, 30, "12", 1, 0); y += 50; QP.DrawBarcode(20, y, 50, 30, "123", 1, 0); y += 50; QP.DrawBarcode(20, y, 50, 30, "1234", 1, 0); y += 50; QP.SaveToFile("out.pdf"); Andrew.