Context

(My issue is related to #272) The current syntax of declaring widgets does not allow adding properties with generics (like Vec<T>), and you need to use type aliasing:

(does not compile, the compiler complains: no rules expected this token in macro call)

widget!(MyWidget {
    items: Vec<MyStruct>
});

This works:

#[derive(Debug, Clone, PartialEq)]
pub struct MyStruct;

type MyList = Vec<MyStruct>;

widget!(MyWidget {
    items: MyList
});

Problem description & Solution

1. Change the syntax of the widget!() macro to allow passing a generic type when declaring widgets, like:

widget!(ListView<T>);

or

widget!(TableView<TableViewState, T>);

where T is a generic type, like MyStruct.

2. Refactor ListView to allow a generic type.

Developers working with ListViews or other generic widgets could work with their own struct when developing UIs.

Examples and MockUps

#[derive(Debug, Clone, PartialEq)]
pub struct MyStruct;

widget!(MyWidget<MyState, MyStruct{
    items: Vec<MyStruct>
});

More good example JavaFX's ListView and TableView