I would like to add a new D-Bus hotkey for Skanlite which allows to start getting preview image. But KSane widget keeps required slot private. It should be made accessible for external app.
I'm using skanlite via global D-Bus hotkeys while watching fullscreen video. This shortcut isn't critical as user still needs to check GUI for preview result. But at least user don't need to get back to GUI to start preview scanning.

Anyway it's a minor tweak which causes (most likely) a binary compatibility break. So I'm fine if it won't reach the codebase. I have it in my fork anyway. If it's acceptable then I'll submit a diff for Skanlite depending on this patch.