[SOLVED] Custom GUI Element (notified when adding child)

[xterminhate]

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Found this very recent thrread about my problem : http://irrlicht.sourceforge.net/forum/v ... nd#p277529
I'm not considering this problem as a bug of Irrlicht. I'm just looking for a good solution to handle dynamic changes of GUI Element tree.
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Hey,

I'm coding a custom GUI Element and I'm facing a little problem.

I cannot find a way for my new GUI Element to be notified when another GUI Element registers itself as a child.

It seems that there is no way to overload the member function that allows registering a GUI Element to a parent one.

IGUIElement.h
00817 // not virtual because needed in constructor
00818 void addChildToEnd(IGUIElement* child)

I would be please if someone could give me a tip. I can see no other way that scanning the list of children at every frame in order to detect new childs.

Bye,
X.

[CuteAlien]

You can overload addChild. It just won't work whenever you add childs using the constructor instead so you have to explicitely call addChild when adding them. I don't think there's a way around this. It's an unfortunate bug that this constructor even exists, I hope I can find time to work on this before 1.9 release.

[xterminhate]

Thank you very much for your quick reply, CuteAlien.

Well I have come to the same conclusion. My custom GUI element will not be as generic as I expected.

As long as the part of the GUI tree, where is located my custom GUI element, does not change often during execution (in-game), this is not a big problem.

I will post my GUI element in the code snippets section soon if I have got a good result.

Solved.
X.

[xterminhate]

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That works, not too bad.
Follow : http://irrlicht.sourceforge.net/forum/v ... =9&t=48291
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Hello,

This custom GUI element is called CGUIDynamicGrid.

In the following demo, I inserted one instance between the GUI Root Element and the instances of the GUI Windows. I did not change the Irrlicht 1.8 library. The algorithm of GUI Dynamic Grid has to be manually activated when adding a new child (eg. Window). The focused GUI child element of GUI Dynamic Grid automatically sticks to other GUI child element. Now, I'm looking for a way to dettach the windows. I will probably use a key (CTRL or SHIFT) to trigger the dettach algorithm.

http://www.youtube.com/watch?v=TlIWHTYHQxw

Let me know what you think. I will post the source code in a few days (I'm cleaning it, trying to conform Irrlicht conding rules).

X.

NB: I think there is a little bug with the focus and the GUI List Box of Irrlicht 1.8. I failed to drag the first GUI Windows on top of the List Box.

[CuteAlien]

Looks pretty cool.