On 26.09.19 18:22, Julien Cugnière wrote:
Le jeu. 26 sept. 2019 à 17:03, Simon Hausmann <simon.hausm...@qt.io> a écrit :
I would like to propose an API that replaces the setter and getter functions on
objects with a new property template class that encapsulates the property value
instead, and the ability to tie binding expressions to these properties for
automatic updates. In short, it looks like this:
Hello Simon,
As a user, I find this project very interesting, as after learning
QML, I often found myself wanting to use some kind of binding system
when coding in C++.
One question that comes to mind when you mention lazy evaluation: how
does this interact with the "onPropertyChanged" signal? In QML, one
sometimes sees code like :
onFullnameChanged: {
console.log("the fullname changed!");
foo.bar();
}
At first glance, this doesn't seem compatible with lazy evaluation.
This is possible too. (see the onPropertyChange, in Simon's Patch.)
When you have a change handler on a property, you indeed need to re-evaluate
that property.
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