Implement PerspexObject Clone support

[amerkoleci]

Allowing cloning of PerspexObject and all its properties (values) would be usefull, specially brush clones etc.

[grokys]

This is something @SuperJMN is working on right now I believe.

However, could you give a use-case to help us understand what you need?

[amerkoleci]

Wpf has the concept of Freezable and Animatable, Brush derives from this so the user can Clone a brush and CloneCurrentValue (which clones instance and copies properties value).

[grokys]

I think it's unlikely that Perpsex will have Freezable - it's more likely we'll go with immutable objects, though that hasn't been decided for definite.

However, I still don't know why you need cloning. Could you give a use-case? I.e. What are you trying to do?

[amerkoleci]

Wpf brush linear gradient and radial gradient can set the mapping mode (absolute or relative), during rendering (to Direct2D) I need to remap thoose values to bounds, thus I need to clone the brush and remap some values, I can with no problem hardcode the clone method but was wondering if you were going to implement this.

[grokys]

Ok, thanks. Yes I need to work out how that situation will be handled. Do you see any problems with making gradient brushes mutable?

[amerkoleci]

Nope, basically I check whether the brush is relative to bounds and map start/end point in linear gradient brush, the mapping method is this:

public static Point MapPoint(Rect bounds, Point p)
        {
            return new Point(bounds.Left + p.X * bounds.Width, bounds.Top + p.Y * bounds.Height);
        }

Same goes to radial gradient, you map center and center origin.

[SuperJMN]

Hey, just for our information, I'm working on a ITreeReplicator that takes a PerspexObject and generates a replica of it :)

[grokys]

Closing this as I don't think it makes sense and would be hard when considering that the order in which properties are set makes a difference. Please re-open if you really need it.