Feature Request: Math in Property Input Fields

[quickSuggestion]

We should be able to do math in any property input fields (ex. typing in 14*40 for width would yield 560, 500/2 would yield 250, etc). I don't believe it's possible to do this through plugins, and many other programs have this feature.

[Rick Brewster]

Can you give an example of another program that supports this? I've never seen it myself

[midora]

I'm allowing this in some of my applications but you are forced to start the expression with an '=' operator (like in excel cells).

 

BTW: OptionBased allows to add a default unit to the creation of a control (plus mappings for alternative units with factors for scaling and offset). The value will always be returned in the default unit. I.e. the Parallel lines and patterns plugin allows you to enter values in px, mm, cm, in, and pt (the tooltip shows the values in all units).

Edited December 14, 2021 by midora

[NinthDesertDude]

1 hour ago, Rick Brewster said:

Can you give an example of another program that supports this? I've never seen it myself

It's in a few, like Blender. Of course, Blender is a massive super-project so I'm not sure that counts. It's nifty; I'm not sure how important it is to support here since unlike Blender, PDN isn't rife with exact editing of sliders. If it should be anywhere, I'd say the rgb and hsv boxes in the color window make the most sense of all

Edited December 14, 2021 by NinthDesertDude

[753]

On 12/14/2021 at 11:03 AM, Rick Brewster said:

Can you give an example of another program that supports this? I've never seen it myself

Gimp, Blender, and Unity all support this feature.

 

It's especially useful for game design where you'll often need to adjust things by exact ratios or powers of 2.

[Rick Brewster]

19 hours ago, 753 said:

Gimp, Blender, and Unity all support this feature.

 

Looks like Krita does as well.

 

If someone knows of an example of how to implement this in WinForms, that would speed up being able to add this.

[BoltBait]

2 hours ago, Rick Brewster said:

If someone knows of an example of how to implement this in WinForms

 

This looks like overkill*:

 

https://github.com/dynamicexpresso/DynamicExpresso

 

Maybe something like this:

 

https://stackoverflow.com/questions/17183314/mathematical-expression-entered-in-one-text-box-and-display-its-result-in-other/17184090#17184090

 

Might need to add ( ) and make it recursive though.

 

 

 

* Of course, with this you could define variables, like Selection.Width, Selection.Height, Canvas.Width, Canvas.Height, etc. which would be pretty cool. But, would this open security risks with interpreted code?

 

[Disk4mat]

Im only asking out of ignorance. What might be a scenario where you could use this? Im thinking things like 10*50... Why not type in 500? So Im sure that this whole thing is going over my head some how. TIA

[NinthDesertDude]

> Im thinking things like 10*50... Why not type in 500?
easy, 47 * 23. Annoying enough that a calculator is much easier.

If you struggle to find something, I did basic math parsing once with infix notation in https://github.com/NinthDesertDude/SharpParser
which does allow simple functions, but also has a version that doesn't. Maybe it's useful