[Bug 103645] zoom in with rectangle tool selection

[Gilles Caulier-4]

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http://bugs.kde.org/show_bug.cgi?id=103645         




------- Additional Comments From caulier.gilles gmail com  2007-03-21 14:15 -------
>    Maybe the following would be a simple solution:
>    introduce a new (user-changeable) zoom_factor, by which
>    the magnification gets multiplied (divided by):
>    E.g. with zoom_factor=1.4 using the mousewheel for zooming


are you read my previous messages ? The mouse wheel zooming control is already implemented in editor like this :

CRTL + mousewheel ==  Zoom +/-
SHIFT + mousewheel ==  previous / next image.

look in canvas.cpp the method "void Canvas::contentsWheelEvent(QWheelEvent *e)"

But for obscurs reasons, the keyboard events is not handle at the same time than mouse wheel events by QT. I don't know why...

 

>    would lead
>    to the sequence
>    100%  140% 196% 274%  384% ...
>    and in the other direction:
>      71%  51%  36% ...

>    Technical remark: If the actual zoom-level is just an integer percentage,


no, internally, it's a float value.
 
Gilles
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[Arnd Baecker]

> are you read my previous messages ?

Sure! ;-)

> The mouse wheel zooming control is already implemented in editor like
> this :
>
> CRTL + mousewheel ==  Zoom +/-

Yes, I have tested this - it works fine for me

> SHIFT + mousewheel ==  previous / next image.
>
> look in canvas.cpp the method "void Canvas::contentsWheelEvent(QWheelEvent *e)"
>
> But for obscurs reasons, the keyboard events is not handle at the same time than mouse wheel events by QT. I don't know why...

Both CTRL+mousewheel and SHIF+mousewheel work fine for me!
(Apart from the fact that the point over which the mouse
pointer currently is not kept fixed, my first remark in #8 ...)

So because it works for me, but not for you,
this must then be the reason for the confusion?

I am talking about something differnt, namely
the sequence of zoom values which is obtained when
using CTRL + mousewheel ...

> >    would lead
> >    to the sequence
> >    100%  140% 196% 274%  384% ...
> >    and in the other direction:
> >      71%  51%  36% ...
>
> >    Technical remark: If the actual zoom-level is just an integer percentage,
>
> no, internally, it's a float value.

OK, then it seems easier to implement (no need to care about
a stored list).

Best, Arnd
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