Article View: borland.public.cppbuilder.nativeapi
Article #1712Re: ExtCreatePen & PS_GEOMETRIC & PS_USERSTYLE unit problem
From: Bob Gonder
Date: Thu, 21 Jun 2007 16:53
Date: Thu, 21 Jun 2007 16:53
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1741 bytes
Eyyub Volkan ๏ฟฝektimur wrote:
>DWORD userStyles[2]={30,40}; // 30unit line, 40unit space, .......
>the question is; what is the UNIT for patterns to define pen styles ? and is
>there any multiplier for it ? thanks for helping...
Logical (pixel) Units
Check both printers using GetDeviceCaps() for this value:
LOGPIXELSX Number of pixels per logical inch along the screen
width.
I think you will find Pixels per mm == LOGPIXELSX / 25.4
So you would want to adjust userStyles[2] according to LOGPIXELSX
or if you are drawing vertical dashed lines, you would want to set it
by LOGPIXELSY as it might be different.
You seem to want close to a 3mm dash, so
ppmm = (LOGPIXELSX * 3 * 10) / 254;
userStyles[0] = (ppmm * 3) / 7;
userStyles[1] = (ppmm * 4) / 7;
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X-Google-Thread: 10cc67,14963a181a9d9cb6 X-Google-Attributes: gid10cc67,public,usenet X-Google-Language: ENGLISH,ASCII From: Bob Gonder <notbg@notmindspring.invalid> Newsgroups: borland.public.cppbuilder.nativeapi Subject: Re: ExtCreatePen & PS_GEOMETRIC & PS_USERSTYLE unit problem Date: Thu, 21 Jun 2007 09:53:58 -0700 Organization: MindSpring Enterprises, Inc. Reply-To: notbg@notmindspring.invalid Message-ID: <ho9l73tr720f3belu39agu7dmnjdhe8fp6@4ax.com> References: <467a6d3e$1@newsgroups.borland.com> X-Newsreader: Forte Agent 1.93/32.576 English (American) MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit NNTP-Posting-Host: 67.77.145.161 X-Trace: newsgroups.borland.com 1182444838 67.77.145.161 (21 Jun 2007 09:53:58 -0700) Lines: 25 Path: arc1-ca.pugleaf.net!g2news1.google.com!news3.google.com!news1.google.com!news.glorb.com!newsfeeds.ihug.co.nz!ihug.co.nz!newsgroups.borland.com!not-for-mail