47 lines
1.8 KiB
Markdown
47 lines
1.8 KiB
Markdown
# swinging-needle-meter
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A [re-frame](https://github.com/Day8/re-frame) application designed to display an example swinging needle meter, as an experiment in animating SVG from re-frame. Draws heavily on re-com.
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Works well in Chrome and Firefox; not tested in Internet Exploder.
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## Intended uses
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This is a component for a console, typically one controlling a technical or scientific instrument. It is
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by design flexible and configurable. Minimum value, maximum value, warning value and number of gradations
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shown are all configurable, as are (obviously) styles.
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A cursor will be shown if the value of *setpoint* is between *min-value* and *max-value*; *setpoint* is a dynamic value which is watched during the run. While the *model* value is within +- *tolerance* of the *setpoint* value, a class *target-class* is set on the meter indicating an on-target status (by default the frame goes green).
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A red-zone may be shown if a *warn-value* is set which is between *min-value* and *max-value*. If such a *warn-value* is set, then if the current value (*model*) exceeds *warn-value*, a class *warning-class* is set on the meter indicating a warning status (by default the frame goes maroon).
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## Development Mode
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### Run application:
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```
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lein clean
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lein figwheel dev
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```
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Figwheel will automatically push cljs changes to the browser.
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Wait a bit, then browse to [http://localhost:3449](http://localhost:3449).
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## Production Build
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To compile clojurescript to javascript:
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```
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lein clean
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lein cljsbuild once min
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```
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## License
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Copyright © 2017 Simon Brooke. Licensed under the GNU General Public License,
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version 2.0 or (at your option) any later version. If you wish to incorporate
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parts of this into another open source project which uses a less restrictive
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license, please contact me; I'm open to dual licensing it.
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