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Dynamic windows & widgets [message #45332]

Sat, 31 October 2015 10:46

normvcr
Messages: 5
Registered: October 2015

Promising Member

The examples I have seen show menus and toolbars as data members of top-level windows. Can a top-level window be created with menus and toolbars, without being pre-defined as a class with these objects as data members? i.e. something like this:

window = new Window;
window->add( new Menu );

Thank you

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Re: Dynamic windows & widgets [message #45348 is a reply to message #45332]

Sat, 31 October 2015 19:26

cbpporter
Messages: 1401
Registered: September 2007

Ultimate Contributor

normvcr wrote on Sat, 31 October 2015 11:46

The examples I have seen show menus and toolbars as data members of top-level windows. Can a top-level window be created with menus and toolbars, without being pre-defined as a class with these objects as data members? i.e. something like this:
window = new Window;
window->add( new Menu );
Thank you

Sure, it can. But it is an inferior approach with no benefits and only disadvantages. You loose the ability to refer to a widget at a random point in time if you do not have a member to store it. And if you do want a member to store it, not using pointer removes the need to do manual memory management.

The only scenario I can think of is when you wish to load an interface from an external file, like and XML file. There is a sample if I am not mistaken which loads GUI from and XML file.

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Re: Dynamic windows & widgets [message #45358 is a reply to message #45348]

Sun, 01 November 2015 18:20

mirek
Messages: 13975
Registered: November 2005

Ultimate Member

http://www.ultimatepp.org/reference$DynamicDlg$en-us.html

Note that even in this case, recommended U++ approach is to avoid 'new'/'delete' and use Array and in-place creation.

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