Great work/improvement Tim!
Thanks!
On Sat, Jan 26, 2013 at 1:47 AM, Tim E. Real <termt...@rogers.com> wrote:
> Continuing with some usability fixes...
>
> Here's a fix I guarantee that we will *all* appreciate, for the Arranger,
> PianoRoll, DrumEditor, and /especially/ for those who work with
> WaveEditor:
>
> Zoom about the cursor!
>
> The Zoom In and Out shortcuts Ctl+PgUp/PgDown (defaults) and
> Ctl+MouseWheel now zoom about the mouse cursor position.
>
> Until now, all zooming was done relative to the canvas' left edge.
>
> I can't tell you how many frustrating years I've worked with
> wave parts in MusE, where one frequently needs to zoom in and out
> from low to high magnification just to find those unwanted spikes
> or do some fades or curious viewing or whatever.
> Since the zooming was relative to the left canvas edge, we would zoom
> and our reference position would go whipping waaaay to the right
> leaving us completely lost - "where the heck am I?" - and adding insult
> by forcing us to do a long painful squint-eyed scroll back to the place
> we were looking at.
> At high magnifications, this was hell.
>
> No more. Be gone!
> Mag... ...nificant!
>
> Try 'er out.
>
> Note that due to the fact that MusE does not allow the left edge of
> a canvas to "pull in" ie does not allow bar zero to be "anywhere",
> when you cross over the threshold of the horizontal scroll bar
> thumb track being "full" or completely left, you will *lose* the
> point you are zooming about, as it *must* shift.
> Not much I can do there. Maybe someday we can allow it, so that
> you *never* lose you zoom-about point, no matter what zoom
> level you are at.
>
> Also, due to rounding and conversions etc, the zoom-about point
> may shift slightly as you zoom. It's only worse at higher magnifications.
>
> Tim.
>
>
> >From ChangeLog:
> ------------------------------
> Feature/fix: Zoom at cursor! Zoom Ctl+PgUp/PgDown (defaults) and
> Ctl+MouseWheel now zoom about cursor.
>
> Eliminated redundant call in ScrollScale::setMag(), by blocking signals.
> Consolidated all HorizontalZoomIn and HorizontalZoomOut functions
> into a single HorizontalZoom.
> Added eight more 'quick zoom' levels to class ScrollScale.
> Modified all HorizontalZoom functions to pass cursor offset, and use it
> in ScrollScale::setScale().
>
>
>
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