Re: Handling zooming (pinch) with mouse (multi-touch gestures) on OS X

[Mojca M. <moj...@gm...>]

On Sun, Jan 8, 2012 at 20:28, Ethan Merritt wrote:
> On Sunday, 08 January 2012, Mojca Miklavec wrote:
>> PS: Qt terminal is a tiny bit buggy. Scrolling left/right results in
>> scrolling of graph up/down. Even if scrolling left/right is not yet
>> supported, it should at least not try to be clever and scroll up/down.
>
> Both right/left and up/down scroll work fine for me.

I wasn't clear enough (I find it difficult to explain).

1.) Scrolling up/down (read as: sliding two fingers up/down) works properly.
2.) Holding Shift + scrolling up/down (sliding two fingers up/down)
correctly moves the plot left/right.

However, while regular mouses only provide scroll wheels for
one-dimensional moves (up and down), trackpad on Mac OS X enables one
to scroll in 2D (both up/down and left/right, or actually in arbitrary
directions in plane).

3.) Scrolling left/right (sliding two fingers left/right) moves the
plot up/down which is wrong and should not happen.

4.) I would like to understand what part of gnuplot's source code is
aware of mouse scrolling events (is receiving signals from operating
system, so that GE_buttonrelease is set for example).

> Could it be a problem of key mapping?
> The behaviour you see might be explained by a failure to
> distinguish <shift-scroll> from <scroll>.

No, shift-scroll works fine as explained above. It is only a bit
annoying that left-right generates up-and-down movements in the plot.

Mojca