Just that you know, it is to some extent possible in renoise scripting, click and drag in 1 dimension can be made using renoise.ViewBuilder().valuefield , (see the BPM field etc). You can adjust the height to be 5 pixels and as an effect work like a draggable edge. But there’s no way to move the elements of the view at the same time. Then there’s the other problem of guessing the right formula for estimating the cursor position. The original idea of https://forum.renoise.com/t/new-tool-pattern-pone-pattern-overview-and-editing-tool/41881was essentially what’s asked in this thread. But I came into the problem of not accurately guessing the formula for drawing the note lengths (there are margins and spaces for items, you can compensate by having them negative, but that will also mean that your clicking area will now overlap.
It was far more logical to simply dump the idea and switch the midi editor.
Right now the renoise pattern editor is 100% text, in fact you can edit the font to make things more visible/to your liking. http://i.imgur.com/BfoHkQb.png
So making it drawgraphics would require a lot of work. You’ll have to wait for sampleview in the pattern editor 