Using parameter steps to increment/decrement parameters

[fabienbaron]

Adding a +/- column to the treeview would allow to change parameters by clicking + or -, using the step size defined in the column step. Much easier than changing everything by hand. When combined with a chi2 display, you could basically minimize "by hand" !

[bkloppenborg]

I see the potential benefit to this feature, but worry about how crowded
the parameter area will be with the extra buttons and the units in #105
being added. Can we come up with some other method of doing this?

P.S. the MDI region on the right is going to be used for data plots in the
gui display in gui overhaul. So making the parameter region wider will
detract from this planned feature which I envision will be much more useful.

[fabienbaron]

My solutions to adding units hardly takes more space. And the +/- will barely affect it. Once you have the chi2, data plots are not going to be useful within simtoi itself, as you will want all three types of data, maybe for several epochs, i.e. lots of plots. This is better done externally imo, with a software that will have good eps/pdf export such as the one you already wrote, and not with the flaky Qt plotting functions. My take on the MDI is that it should display the models for all epochs, which I think was the initially motivation for the gui overhaul.

[bkloppenborg]

@fabienbaron , is this still something you would like to see or is the new interface adequate?

[fabienbaron]

Would need buttons with +/-.