Bug 281093

Summary:	interface classes don't support attributes
Product:	[Applications] umbrello	Reporter:	greatbunzinni
Component:	general	Assignee:	Umbrello Development Group <umbrello-devel>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	ralf.habacker
Priority:	NOR
Version:	1.1
Target Milestone:	---
Platform:	Unlisted Binaries
OS:	Linux
Latest Commit:		Version Fixed In:

Description greatbunzinni 2011-08-31 09:11:03 UTC

Version:           1.1 (using KDE 4.6.2) 
OS:                Linux

Umbrello's interface classes don't support attributes.  This is a major shortcoming, as it means that a user is forbidden from designing abstract base classes which provide member variables, a common technique to replace public pairs of set/get methods.

Reproducible: Didn't try

Steps to Reproduce:
1) try to add an attribute to a class

Actual Results:  
there is no option

Expected Results:  
there was an option to add attributes to interface classes

OS: Linux (x86_64) release 2.6.38-11-generic
Compiler: cc

Comment 1 Ralf Habacker 2016-08-31 13:59:08 UTC

> a user is forbidden from designing abstract base classes which provide member variables
This is not true and could be performed by adding a regular class with property "Abstract Class" set or by converting an interface to a class by using the context menu entry "convert to class."

If this is required often umbrello can be extended in two ways:
1. Add an additional entry in the toolbar and the class diagram context menu "new"  named "Abstract class".
2. Add a global option to umbrello to generate interfaces by using a class and "abstract class" property set by default.