Add a handler for converting view frame to other coordinate systems

[sedyh]

Hello. Just tried to use furex for my project and it seems great, but since I can zoom the camera closer, I need to adjust the position of the root view and the sizes of all child views to be able to scale according to this number with the layout rearranged during zoom. Is it possible to add some FrameHandler / UIScale *float64 / WorldToScreenConverter to do this automatically?
Right now I'm updating them manually via Left/Top/Width/Height + Layout().

[yohamta]

Hello @sedyh 👋, thanks for the great suggestion! Yeah, I like the idea and it seems really awesome. Would you happen to have the implementation idea already? If that's the case, I really appreciate if you would kindly spare a moment to create a PR for it.

Is it possible to add some FrameHandler / UIScale *float64 / WorldToScreenConverter to do this automatically?

[sedyh]

Well, I have some sort of FrameHandler but it's not finished yet, I'll probably make a PR later.
Btw, is it possible to not specify the size of the root element? I would like it to be calculated depending on the sizes of the internal elements or with a minimum size, as in css.

[yohamta]

Oh that's really great, thanks a lot!

Btw, is it possible to not specify the size of the root element? I would like it to be calculated depending on the sizes of the internal elements or with a minimum size, as in css.

Yeah, I think that's possible. Right now, it only calculates the size of the children's view during layout.
But we could probably introduce a functional option parameter or maybe even a new constructor that lets you create an instance without needing the size(width, height) parameter.

furex/view.go

Lines 81 to 97 in 78826a5

	func (v *View) startLayout() {
	v.lock.Lock()
	defer v.lock.Unlock()
	if !v.hasParent {
	v.frame = image.Rect(v.Left, v.Top, v.Left+v.Width, v.Top+v.Height)
	}
	v.flexEmbed.View = v
	for _, child := range v.children {
	if child.item.Position == PositionStatic {
	child.item.startLayout()
	}
	}
	v.layout(v.frame.Dx(), v.frame.Dy(), &v.containerEmbed)
	v.isDirty = false
	}