Added scrollable style focused to be displayed when mouse is over the scrollable area

[GyulyVGC]

Hi! It's my first PR here for iced!

I added a style focused thought to be displayed when the scrollable area is hovered (not the scrollbar itself).

In my opinion, this is a more flexible solution to #1573.
In this way, a user can decide to hide the scroller when the area is not hovered or simply to have a different style from the active case, which would now be used when the scrollable area is not hovered.
If focused is not implemented, active will be used anyway.

If you don't like the name "focused", suggestions are welcomed!

Untitled.mp4

[hecrj]

I think the name should be hovered instead of focused, like in a button::StyleSheet.

[GyulyVGC]

I think the name should be hovered instead of focused, like in a button::StyleSheet.

The point is that hovered is already used to refer to the case when just the Scrollbar is hovered (instead of the whole scrollable area).

[GyulyVGC]

@hecrj may I ask you what can I do to make this PR ready to be merged?

[hecrj]

@GyulyVGC We need a better name here. focused is misleading.

[GyulyVGC]

You are free to suggest a name of your preference.

Hovered would be awesome, but the problem is that it's already used.

[hecrj]

I think we could just add a boolean over_scrollbar argument to the hovered method.

[GyulyVGC]

I think we could just add a boolean over_scrollbar argument to the hovered method.

Wouldn't this method also require to pass two distinct style arguments?

As an alternative, what about naming it focused and renaming the current focused to focused_scrollbar?

[hecrj]

Wouldn't this method also require to pass two distinct style arguments?

No. The Style is always the same for both states of the scrollable.

[GyulyVGC]

I think the name should be hovered instead of focused, like in a button::StyleSheet.

Following your suggestion, I renamed it to hovered.
The style that was previously hovered has been renamed to hovered_scrollbar.

[hecrj]

Thanks!

I just added the is_mouse_over_scrollbar flag as I suggested in the end. No need for additional methods.

[GyulyVGC]

Amazing! Thanks for the corrections!