Re: [Audacity-devel] Can't zoom in on end of selection with Ctrl+Mouse Wheel (svn reviion 11726)

[Bill W. <bi...@go...>]

On 07/05/2012, at 5:05 PM, Gale (Audacity Team) wrote:

> Nonetheless there is an inconsistency here that is a bit confusing. You 
> can zoom in where the mouse pointer is in white space before the audio
> starts, but something else happens when you zoom in where the pointer
> is after the end of the audio. Also if you zoom out where the pointer 
> is after the end of the audio, the behaviour is different to when you 
> zoom in. 

I'd prefer that zooming out stop when the graph is entirely to the left of the mouse pointer position. That avoids most situations where the graph can collapse to a tiny region at the start of the track (unless the user is zooming out e.g. at the 30-second mark on a one hour track).

> 
> Is some fix not possible where we can do what Martyn wants, but at 
> least have scrolling in the opposite direction get you the graph back? 

The big advantage I see in Martyn's solution is that the mouse pointer remains stuck at whatever time is was hovering over. The disadvantage when zooming out is that this would eventually necessitate having the Timeline start at a negative value. Would it be possible to stop zooming out one step before you need to display negative time?

The most disconcerting part of the current implementation is that you can't get back where you came from after you zoom out too far. The instinct is to leave the mouse pointer where it is and zoom back in, but you eventually end up with the end of the graph under your mouse pointer.

-- Bill

> 
> Thanks for the improvements so far, though since most zooming I do
> is actually to the centre of the selection, I liked using wheel instead 
> of buttons for that.  CTRL + SHIFT + Wheel?   
> 
> Gale 
>