I realized we already can scroll with Shift + scroll and zoom with Ctrl + scroll. So I would keep this behavior as official keyboard shortcut.
But there are some inconsistency of deltaY on WheelEvent during various environments. e.g. Windows + mouse provides too large value for deltaY. So I have normalized it not to change scale too much by one wheel event.
fix #26
I realized we already can scroll with Shift + scroll and zoom with Ctrl + scroll. So I would keep this behavior as official keyboard shortcut.
But there are some inconsistency of
deltaY
on WheelEvent during various environments. e.g. Windows + mouse provides too large value fordeltaY
. So I have normalized it not to change scale too much by one wheel event.