zoomed in image is not able to be moved around in quick view

[David Werier]

In the quick view panel I zoom into an image either by double clicking the image or holding down the ctl key and rotating the mouse wheel. In the past I was then able to move the zoomed in image around so I could see parts that were not showing because they were outside of the zoomed in portion. I would move it around by left clicking and holding that down while I dragged the mouse. This no longer works. The arrow keys also don't work to move the image around.

[Mario]

Works fine here, just tried.
If you zoom in and left-click and hold, the file can be panned. No change here to IMatch 2023.

Just to be sure: You mean Quick View Panel, not  Peek View? Peek View has no pan.

[David Werier]

I do mean the Quick View Panel. It still is not working for me. What should I do to help figure this out.

[Mario]

No idea. Double-click to toggle between fit-to-window and 100% zoom. <Alt>+mouse move to zoom in and left-click and hold to pan.

I have tested this on 3 PC's and it worked on all of them. No similar reports from other users so far, so this seems to be something rather unique...

[David Werier]

I have not used <Alt> + mouse move to zoom in before. I just tried that and it too doesn't seem to work. But the main thing that I have used fairly regularly is the left-click hold and then mouse move to pan. And that is not working.

I can't say for sure when this started but clearly since I updated to IMatch 2025, which was just three days ago. I started with 2025.1.6 and now 2025.1.8.

[thrinn]

Works for me as expected. Tried it with different settings (docked / undocked panel, different window sizes). Always works as described in the help.

[Mario]

I've checked the revision control system for changes between 2023 and 2025 related to the Quick View Panel, but apart from new ribbons, icons and menus I don't see any. No changes in how the click-pan is handled.

Does it work in the Viewer?
The Quick View Panel and the Viewer use the same underlying image render, zoom and pan code.

[David Werier]

It does not work in the viewer either.

[thrinn]

This is really just a shot into the dark: Have you by any chance some kind of mouse configuration software running (e.g. like Logi Options+) where you can redefine the behaviour of some mouse buttons?

[Mario]

Ar, maybe, reboot your system once, in case something weird happened?

[David Werier]

Not a shot in the dark. 

I have had for years my "primary" (left) and "secondary" (right) mouse buttons switched. See the setting in Windows that allows for that (see attached screen shot).

I went ahead and unchecked the "switch primary and secondary buttons" box. Then in iMatch things worked as expected.

I would like to keep my primary and secondary mouse buttons switched and be able to pan in iMatch, as I have been doing for years. Is there some way to make that happen?

[Mario]

I have figured this out. It is a side-effect of a accessibility enhancement change I've made on September 22. 2024.

I've interpreted some API documentation wrong and explicitly checked with a system function of the user has swapped the primary and secondary mouse key, and, depending on the outcome, queries a system mouse state function differently.

As I have learned, even this low-level function receives the already swapped primary/secondary mouse. No need to check myself.

The code is used in the code that differentiates between left+click and hold and double-click, which in turn prevent you from panning the image in the Quick View Panel and Viewer. I have fixed this for the next release.

Tip: In Windows 11, you can enable this setting directly here:

[David Werier]

Thanks Mario . Looking forward to the next release.