[Interest] Row(Layout), use spacing as resize handle. How to do that?

[Mark Gaiser]

Hi,

It seems like i'm trying to make something that simply isn't possible
with the currently shipping QtQuick components. So i'm trying to make
a custom version.

Take the following example code as base:

============================================
import QtQuick 2.0
import QtQuick.Layouts 1.1

RowLayout {
    width: 800
    height: 600
    spacing: 0

    Rectangle {
        color: "red"
        width: 100
        Layout.fillHeight: true
    }

    Rectangle {
        color: "orange"
        width: 10
        Layout.fillHeight: true
    }

    Rectangle {
        Layout.fillWidth: true
        Layout.fillHeight: true
        color: "green"
    }

    Rectangle {
        color: "orange"
        width: 10
        Layout.fillHeight: true
    }

    Rectangle {
        Layout.fillWidth: true
        Layout.fillHeight: true
        color: "blue"
    }
}
============================================

This example has no interaction, obviously :)

What i'm trying to make is use the spacing between elements as resize
handles. By default (in Row and RowLayout that is not possible since
it's just a real value setting. It's not a delegate.

So i have a few different ways in making this. Nether seems to work
neatly though.

1. Use anchors where i anchor elements to the resize handle. This
isn't very feasible because the resulting code uses lots of anchor
magic and is just a mess to make easily extendable with more elements.
Something that is easy for the RowLayout.

2. Use RowLayout and add my own "resize handles". Seems like the
cleanest solution but doesn't work in practice because moving the
handles (the ones in orange in the example) don't update the RowLayout
itself.. So nothing besides the handle changes.

Now i'm searching for a hybrid solution.
I want to create something with the simplicity of the example provided
above but with the functionality as if i where using anchors. But i
don't quite know where to start. Do i need to make a custom QQuickItem
class? Or do i need to play with some other class? If so, which
one(s)?

Cheers,
Mark