0029884: Calling sequence of BeforeUndo() and AfterUndo() unpredictable - MantisBT

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ID

Project

Category

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Date Submitted

Last Update

0029884

Community

[OCCT] OCCT:Application Framework

public

2018-06-20 10:56

2018-06-20 11:15

Reporter

Vico Liang

Assigned To

mpv

Priority

normal

Severity

minor

Status

new

Resolution

open

Platform

OS

OS Version

Product Version

Target Version

[OCCT] 7.4.0*

Fixed in Version

Summary

0029884: Calling sequence of BeforeUndo() and AfterUndo() unpredictable

Description

Undo/redo delta sequence is base on label tree hierarchy. Base on this assumption, attributes may be designed with dependency with each other. The predict behavior is that BeforeUndo() and AfterUndo() will be called in the label tree hierarchy order. Actually, the order is unpredictable. The reason is TDF_Data::FixOrder() adjusted the delta order to fix another bug 0029142. It seems ugly and unnatural with such order fix.

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closed

Open CASCADE

Exception on Redo

Notes
(0076843) Vico Liang (developer) 2018-06-20 11:14 edited on: 2018-06-20 11:15	My use case looks like this, the application is base on TObj package, TObj_TObject rely on AfterUndo() to recover object from death and My_AISPresentation rely on BeforeUndo() and AfterUndo() to do presentation update. My_AISPresentation is designed to depend on TObj_TObject. It will crash during presentation updating on undo/redo because AfterUndo() of TObj_TObject is not called before My_AISPresentation.

Issue History
Date Modified	Username	Field	Change
2018-06-20 10:56	Vico Liang	New Issue
2018-06-20 10:56	Vico Liang	Assigned To	=> mpv
2018-06-20 11:07	Vico Liang	Note Added: 0076842
2018-06-20 11:08	Vico Liang	Relationship added	related to 0029142
2018-06-20 11:10	Vico Liang	Note Deleted: 0076842
2018-06-20 11:14	Vico Liang	Note Added: 0076843
2018-06-20 11:15	Vico Liang	Note Edited: 0076843	View Revisions

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