[feature] Allow for pan and zoom with the mouse/trackpad to move the (infinite) canvas around

gabm / Satty

Satty - Modern Screenshot Annotation. A tool inspired by Swappy and Flameshot.

Mozilla Public License 2.0

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[feature] Allow for pan and zoom with the mouse/trackpad to move the (infinite) canvas around #93

Open mattrobineau opened 2 weeks ago

mattrobineau commented 2 weeks ago

I was going to ask to have zooming added because it's hard to annotate accurately when you have a huge screenshot (like 2 screens in my case) and I found this was already discussed. The issue where it is mentioned (#49) is for something else and I would prefer this feature (pan/zoom) doesn't get lost.

The cool thing would be that it brings a ton of improvements

if something is hidden behind the toolbars, you can just move until its visible

you can draw in and outside the image (infinite canvas)

you can zoom in to work on a very small part of the image

you annotate very small or very big stuff

gabm commented 2 weeks ago

I think you are right with this. That would be great! The technical foundation is there but my time is limited atm..

I can provide guidance though

mattrobineau commented 2 weeks ago

@gabm I should have some time in the upcoming days. My rust skills are likely good enough to help however I've never wrote anything for GTK before or I guess relm in this case.

gabm commented 2 weeks ago

great, i can help to give you a headstart.. you can contact me on matrix: @gabm:matrix.org.

The tech stack is:

rust as programming language
gtk/relm as UI Framework (buttons etc)
femtovg as vector graphics rendering toolkit (viewport, images, annotations)

You will want to work on the renderer - a femtovg-backed struct and manipulate the transform (translation, zoom) there...