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General HydroStatics
Ship Stability Software |
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Command of the Week
(New or interesting aspects of GHS that you may not know about) |
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PICSHOW
(Requires GHS version GHS 16.58 or later) |
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In GHS you have the intrinsic set of commands, and then you have
MACRO commands -- "Big" commands that you make by putting together
commands and giving them a name.
No doubt you already knew this. We say it to explain why an issue of the Command Of the Week, like this one, can be a "MACRO COW." Back in COW030, the DIR /MACRO command was featured, and a couple of examples were given showing how DIR /MACRO can send file names to a macro to be processed by it. This week we have another application for DIR /MACRO, which grew out of a real-world need that had nothing to do with GHS. When looking for a simple "slide show" application, nothing was found that was simple and easy enough. "Maybe GHS can do it," someone said. "Let's give it a try." Using a template to view JPG files and the DIR /MACRO command to feed the file names to it, PICSHOW took only three short macros in addition to the simple template. And it worked like a charm. Here is the GHS code: |
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template show /bg:15 "Go" .picshow /persist break @$pic$.jpg /width:80 exit / variable started=0 macro start if {started}=0 then set started=1 | copy "%1.jpg" $pic$.jpg / dir *.jpg /macro:start macro copy if {templok}>=0 then exit if "%1"="$PIC$" then exit copy "%1.jpg" $pic$.jpg template /refresh wait 2 / macro picshow dir *.jpg /macro:copy if {templok}<0 then exit picshow / screen min set templok=-1 .show erase $pic$.jpg screen min:rest |
| As you can see in the collage of three screen shots below, there is nothing extra on the screen but the template frame and one Go button to start the show. It cycles through all the JPG files in the folder then starts over again and keeps going until you close the template window. |
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Questions, comments, or requests?
Contact Creative Systems, Inc. USA phone: 360-385-6212 Fax: 360-385-6213 Office hours: 7:00 am - 4:00 pm Pacific Time, Monday - Friday Mailing address: PO Box 1910 Port Townsend, WA 98368 USA Click here for an index to this and previous COWs |