Clone elements with the mouse

[nkh]

In single-click insertion mode, select an object and use it as the object to copy

[nkh]

multiple overlay callbacks must be supported for this and cross to work at the same time

[nkh]

callback caller accepts, list of single characters or an object

• the object rendering code is already implemented (but needs to be factored out)
• the object rendering is cached and will be slightly faster
• better feedback to the user since the clone object is looking like its moving
• less coding as all the objects in the stencils can now be used directly

[nkh]

UX

no object selected

• binding triggered
• use last inserted object
  • sub bindings lets user chose other base objects to clone
• use clicks one or more times
• exit binding triggered

objects selected

• binding triggered
• selection to clone
  • sub bindings lets user chose other base objects to clone

rest as above