Tk Source Code

Many widgets, like entry and listbox, use char * storage for option values. For example listVarName and selectMode (which still is defined as a a Tk_Uid, which - in reality - it is not)

The disadvantage of using char * is that values cannot be shared. Therefore, it's better to use Tcl_Obj * for such values.

Not important enough to rush into 9.0

Last part of fix committed [01a03b2f90192619|here].

This could be backported to Tk 8.7, but that can wait. No prio to do that now.

Jan,
thank you for all the work here. When working on the image command, I never understood why there are strings. It was just forgotten, when the object interface was created.
Appriation,
Harald

Proposed fix for "canvas" [73c4dc748b9bb9c0|here]

Since TkCanvas is an internal structure, we can change fields in it, but it's better not to do that in minor or patch releases. That's why it's better to make this change in Tk 9.0.0, even though it's not high prio.