Undo/Redo geometries in Mayo

[thyis]

Dear Sir:
First! Thanks for developing the wonderful cad viewer mayo, it it really a very good software!
If possible, could you please kindly help to provide some details regarding how geometries can be undo/ redo in mayo using occ interfaces? This would be helpful for some simple geometry creatations and undo/redo (such as sphere etc).

[HuguesDelorme]

Basically, you would use the undo framework provided by TDocStd_Document which Mayo::Document inherits from.
Assuming you have some Mayo::Document object:

doc->NewCommand();
// Make some modifications to the document, eg import file, create primitive shapes, ...
doc->CommitCommand();

Undo the recorded changes:

if (doc->Undo())
    doc->CommitCommand();

Redo after call to Undo():

if (doc->Redo())
    doc->CommitCommand();

[thyis]

Thanks a lot! This is the exact information I was looking for.