Re: matching VCL to touch screen coordinates

Still, this is relevant mainly to zoom (the 2 nd part of my question)
What about the scroll? What determines its granularity, and what would be
the best way to increase its precision, from the current approx 4 -
8 pixels click, to a 1  pixel click?
To clarify, currently, the scroller gets scroll commands on the pixel
level, but it won't cause VCL to redraw, until approx 4 - 8 screen pixels
have been crossed. What could be causing this scaling in rendering
coordinates?

Thanks again
Ptyl

On Monday, August 12, 2013, Ptyl Dragon wrote:

> Ah, integer fractions - i thought it meant percents, but it means a
> representation of rational numbers, through the use of two integers.
> Ok. This info may indeed solve this.
>
> Thanks!
>
> On Monday, August 12, 2013, Thorsten Behrens wrote:
>
> > Ptyl Dragon wrote:
> > > We cannot express the difference between 1023 and 1024, in units of 1%,
> > as
> > > 1% of 1024 is 10.24. So the scale is not sufficient, and even if we
> > fixed
> > > it for iPad, tomorrow there might be a touch device with twice the
> > > resolution.
> > Hi Ptyl,
> >
> > yes, sure. But vcl itself uses integer fractions to express scaling
> > (check the MapMode class there), as such it should be able to convey
> > the necessary information. Thus the question for code to look at - I
> > seem to miss the point. ;)
> >
> > Cheers,
> >
> > -- Thorsten
>
>
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>
> *Ptyl Dragon*
>
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*Ptyl Dragon*

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