Mouse wheel, scrolling and zooming

Thiago Macieira thiago at
Mon Aug 2 06:31:32 PDT 2010

On Monday 2. August 2010 04.35.40 Andre Majorel wrote:
> What would you use in an application to scroll in two dimensions
> and zoom in/out with the mouse wheel ?
> Inkscape and (recent) Gimp use :
> - no modifier: vertical scroll
> - shift: horizontal scroll
> - ctrl: zoom

KDE uses:

no modifier: vertical scroll if vertical scrollbars are present
ctrl: zoom
alt: horizontal scroll

If only the horizontal scrollbars are present, then unmodified buttons 4 and 5 
cause horizontal scroll too. Buttons 6 and 7 always cause horizontal scroll.

The Alt behaviour comes from Qt (since 3.0, in 2002), whereas the Ctrl 
behaviour is usually added by applications that support zooming.

Thiago Macieira - thiago (AT) - thiago (AT)
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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