Add text annotation feature

[bk138]

Text annotation: for example, point to the beginning of the text, and a cursor is rendered and a single line of non-formatted text can be placed in the screen, with the current color;

If you'd like to put out an incentive for implementing this feature, you can do so at https://issuehunt.io/r/bk138/gromit-mpx

[matteg]

When I used windows I daily used the Snagit utility ( https://www.techsmith.com/store/snagit ) to annotate screenshots. I would dearly love the ability to annotate my desktop screen with keyboard text in my choice of colours.

[Cybernetic1]

I'd like to contribute. Which file(s) and where abouts should I start looking at? Thanks :)

[bk138]

I'd like to contribute. Which file(s) and where abouts should I start looking at? Thanks :)

Nice! You basically have to read through the source:

• callbacks is generally all gtk callbacks
• config handles .ini and .cfg file parsing
• drawing contains everything drawing related
• input handles input
• main has the entry point and some general purpose functions

Please also see https://github.com/bk138/gromit-mpx/blob/master/CONTRIBUTING.md