Q&A - Question

Symbols are very small upon printing

Question
Tomaszz Kosinski asked on June 27, 2017, keyword: Developer Kernel

Symbols on screen are in a proper size. However upon printing symbols are far to small. 

I tried to change sizes before print and restore later but it is not very efficient. Is it any simpler solution?

Frank

Answers
Tomasz Kosinski (TatukGIS) replied June 10, 2016

I suppose that you use something like Size=-16.  If you express sizes with a minus sign it means that size is expressed in pixels. Screen resolution is typically 96ppi while printers are >300ppi.

Device independent sizes are positive numbers and are expressed in twips (1/1440 of inch).  If you want to have size that is visually equal to screen 16 pixels calculation is:

computed_size = 1440/96 * required_size = 1440/96 * 16 = 240

In DK11 it is even simpler. You can just use:

  Symbol.SizeAsText;"SIZE:16 dip"

where "dip" stands for device independent pixel and is calculated based on 96dpi.

Of  course you can also use twips, pt, px (mm, cm, m, km, in, ft, yd, nm are used for autoscaling).

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