[Libreoffice-ux-advise] [PATCH] use a geometric progression for zooming

[Tim Hardeck]

Hi Stefan,

thanks for your ideas. Like I have written in my previous mail I have implemented something similar, at least above 50%.
Before that I think little steps are fine but this is just my opinion.

Besides 100% it really does make sense to also check for the complete page width and enforce that as a step too. 

Regards
Tim

On Monday 16 January 2012 19:12:44 Stefan Knorr (Astron) wrote:
> Hi Tim, Cor,
> 
> On 16 January 2012 12:35, Cor Nouws <oolst at nouenoff.nl> wrote:
> > I am looking at the factor 1.2
> > That means that when zoom is 100, the next will be 120.
> > The sequence (if round in Calc does the same as in C++) would look like:
> > 13>17>21>26>33>41>51>64>80>100>120>144>173>207>249>299>358>430>516>619>743>892
> >
> > IMO that leaps are too large, so I would advise 1.1 at most
> > ( at the slider currently + / -  is 5%)
> 
> I don't really have a strong preference here.
> 
> 
> > Factor 1.1 will give the sequence
> > 39>43>48>53>59>66>73>81>90>100>110>121>133>146>161>177>195>214>236>259>285>314
> >
> > However, it results in numbers that might look weird to users ?
> > Maybe a different algorithm / simply table giving steps is better for that?
> > Hmm, how would that show for CTL languages?
> 
> The weird numbers do seem like a bit of a problem to me. With the
> current implementation, it is hard to e.g. get to 50% zoom.
> I think the calculation should be (heavily) biased towards certain
> zoom levels that users will want more than others:
> * fit width
> * fit page (optimal)
> * 10 %
> * 25 %
> * 50 %
> * 75 %
> * 100 %
> * 150 %
> * 200 %
> * 250 %
> * 400 %
> * 500 %
> * 1000 %
> * 2000 %
> * 3000 %
> 
> Additionally, it would be great, if we could always get to ...0% or
> ...5%, so here's an example for how the row could look (with 1.2):
> 5, 10, 25, 50, 75, 100, 120, 150, 175, 200, 210, 250, 300, 360, 400,
> 430, 500, 515... (fit width/fit page would be inserted depending on
> the document)
> 
> with 1.1, it would be:
> 5, 10, 25, 50, 75, 100, 110, 120, 135, 150, 160, 180, 200, 250, 285, 315 ...
> 
> (I believe the value of 1.1 is better on the "magic"-numbers-insertion front)
> 
> Just two cents...
> Astron.
> 

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