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  1. Bug #178336
  2. Comment #9

Comment 9 for bug 178336

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Tom Davidson (tjd-mit) wrote : Re: [Bug 178336] Re: spin boxes increment values on filters UI need tweaking before 0.46 release

For some implementation ideas, take a look at the code in
desktop-widget.cpp that controls the zoom_status spinbutton. This
implements logarithmic scaling by setting the spinbutton's value to
the *log* of the requested zoom. Linear increments/decrements in this
value then result in multiplicative scaling of the zoom factor. There
is some code in zoom_output and zoom_input that takes care of
converting from the log value to the true zoom value (which is
displayed).