Add option to select formula from a list of user formulas

[kanurag94]

Type: Enhancement
Fixes #123

Added option to select formula from a list of user formulas.

1. New formulas can be saved using the Add button, cursor will automatically point to new formula once it is added.
2. Existing formulas can also be selected and deleted using the Delete button.
3. Click OK after selecting formula, to apply formula to the fractal.
4. Currently used formula is populated every time dialog box is opened automatically.

Where to find?
Fractal -> Saved user Formulas

Screenshot

Further Info:
DIALOG_ILIST type dialog can be reused to create such dialog boxes again. This will be helpful in multiple scenarios. Just put a check for label name and save the list there.

[kovzol]

I like the new feature, thanks for the improvement!
Maybe it would be even better if there was no new option for that, but this could be added to the menu User formula..., and an editable combobox could show the current formula, and a list of the former formulas could be shown when opening the list with the arrow icon. In this way there would be no option to remove a formula, but the interface would be more intuitive. Actually, if a user finds a nice formula, he/she will save it as an .xpf file. So there is no need to maintain a big database of formulas, only the last couple of entries should be shown for the user's convenience.

[kanurag94]

So something like this? with upto 10 historical data? and drop down list openable by arrow icon?

[kovzol]

No, with only one input field. Similarly to the URL input field in most browsers.

[kanurag94]

Maybe this?

[kovzol]

Yes---I guess the input field is editable. ;-)

[kanurag94]

Updated #202 with the changes :D