I may have missed something along the way, but hopefully the provided aia project and video may offer some ideas of how to approach things ?
rollingCanvas2.aia (20.7 KB)
I have a vertical scrolling arrangement of height 300px, with a canvas inside with a height of 600px. I have some blocks that generates a line with a squaretooth pattern for each press of the Draw button. I use @vknow360 's ScrollHandler extension to then scroll the canvas down by the height of the line. There are buttons to scroll up and down by 1 line, and you can freely scroll the canvas inside the arrangement. The position button will align the canvas to the height of a line. You can take a picture of the canvas at any time to see what is happening on the entire canvas. Without too much thought, more complex drawings can be made, and different lines drawn as required.
The entire drawing (all lines drawn, in a list)could be saved for reuse, instead of having to reapply images.
Second version with no extensions
rollingCanvas3.aia (8.1 KB)
