2D Depth

[StOneDOes]

Is there a way to reorder the depth of UI widgets such that I can choose what should appear at the frontmost of the view? At the moment it seems that widgets render in the order they were created.

[SpiderPig]

I don't think there is as Josh has said that the depth value can change overtime.  You can read the depth value of a widget with Widget::z but this is a temporary member so I wouldn't rely on it.

[Josh]

WIdget::SetParent has an optional position parameter for this purpose:
https://www.ultraengine.com/learn/Widget_SetParent?lang=cpp

"Position" here means position in the child list, not the sprite depth value.

[StOneDOes]

Perfect, thank you. Can you please add a function that returns the element count of Widget::m_kids ? Because that member is protected.

There is a Widget::CountChildren() but it is commented out.

[Josh]

widget->kids.size()

[StOneDOes]

Oh what!? I swear my visual studio is broken. Ctrl+F found once occurrence of "kids" the first time ... but now I can see it lol. Thanks.

[Josh]

The kids / m_kids thing is a trick that allows me to make read-only class members in C++:

class foo
{
private:
	int m_value;
public:
	const int& value;
	
	foo(int n) : value(m_value)
	{
		m_value = n;
	}
}

foo f(3);
int a = f.value;// this is okay
f.value = 2;// this won't compile

 

[StOneDOes]

Interesting. But it seems like more work than just a simple const accessor function?