kicad-developers team mailing list archive

[Wayne Stambaugh <stambaughw@xxxxxxxxx>]

On 8/28/2017 3:55 AM, Tomasz Wlostowski wrote:
> On 27.08.2017 17:03, Russell Oliver wrote:
>> Hi all, 
>>
>> Attached is a patch that allows for the use of a mathematical expression
>> when editing the value field of components in Eeschema. 
>>
>> If editing the value field and the entered string begins with an equals
>> sign "=" as you would when entering a formula into an Excel spreadsheet
>> cell, it is compiled and parsed when the Enter button is pressed while
>> the text entry is in focus. 
>>
>> A valid expression is returned as a double value which is then printed
>> with a format to remove trailing zeroes. An invalid expression will not
>> change the text value. 
>>
>> The expression parser is simple wrap of the C++ Mathematical Expression
>> Toolkit Library (ExprTk)  written Arash Partow and is under the MIT
>> licence [1]. 
>>
> Hi Russell,
> 
> Looks great, I wanted to have such a feature for parametric mechanical
> design.
> 
> Have a look at the WX_UNIT_BINDER class - it's used in more recent
> dialogs for inputting coordinates/sizes. Perhaps the math parser could
> become a standard part of it?

This makes sense as long as we can continue to use WX_UNIT_BINDER for
normal coordinate entry without math expression support.

> 
> Cheers,
> Tom
> 
> 
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