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Pan with mouse doesn't allow to see the entire picture

Posted: Thu Jan 21, 2016 2:26 pm
by thibaud
this is directly related to this post.
I'm voicing it here because this shortcoming is particularly annoying, and could be considered a "bug".
the only changes I made to default install is assigning the left mouse button to "move picture".

When the viewer fit mode is set to "large only" a left click zoom the picture to 100% (which is great).
Now when moving the mouse with the left button still pressed I can simply pan the picture to examine it a 100%.
this is a great workflow, you navigate with the scroll wheel between picture see them entirely and simply press the mouse to zoom at 100% and pan arround

BUT, the problem with the way the "move picture" works with the mouse input is that in many cases you can't pan to the edges of the picture.
that is when the pictures boundaries expanding outside the window is beyond the distance you can make with your mouse.
the solution would be to implement a translation of the picture that would be linked to the relative position of the mouse to the window.
ie: when the pointer is in the top left window corner you'd have the top left corner of the picture there to (or bottom right picture in the bottom right window corner - if you're into inverse moves)
would you consider implementing such a feature ?

thanks a lot.

Thibaud

Re: Pan with mouse doesn't allow to see the entire picture

Posted: Fri Nov 18, 2016 3:32 pm
by thibaud
Logged in to make this request again.
not being able to pan the entire picture is a major issue for me.
would you provide a fix at some point ?

Re: Pan with mouse doesn't allow to see the entire picture

Posted: Mon Feb 13, 2017 9:01 pm
by helmut
I just read through your text and found that this is not a bug report but a suggestion, right?

Your idea sounds good but I guess it needs more thinking and discussing:
What happens if the users zooms into a large image (e.g. a 2000 x 1000 pixel, 800% zoom) and then tries to drag the image just a view pixels? Perhaps this special pan mode could be activate when pressing Ctrl (or similar)?