Contributors: ISvgEventCaller and Events Support

[paulushub]

Description

ISvgEventCaller and events registration in SvgElement are marked or restricted within Net4 preprocessors.
I assumed that was the time Versions lower than .NET 4 are also supported.

#if Net4
	/// <summary>
	/// Use this method to provide your implementation ISvgEventCaller which can register Actions
	/// and call them if one of the events occurs. Make sure, that your SvgElement has a unique ID.
	/// The SvgTextElement overwrites this and regsiters the Change event tor its text content.
	/// </summary>
	/// <param name="caller"></param>
	public virtual void RegisterEvents(ISvgEventCaller caller)
	{
		if (caller != null && !string.IsNullOrEmpty(this.ID))
		{
			var rpcID = this.ID + "/";

			// NOTE: ... deleted all others ...
			caller.RegisterAction<int, bool, bool, bool, string>(rpcID + "onmousescroll", OnMouseScroll);
		}
	}

	/// <summary>
	/// Use this method to provide your implementation ISvgEventCaller to unregister Actions
	/// </summary>
	/// <param name="caller"></param>
	public virtual void UnregisterEvents(ISvgEventCaller caller)
	{
		if (caller != null && !string.IsNullOrEmpty(this.ID))
		{
			var rpcID = this.ID + "/";

			// NOTE: ... deleted all others ...
			caller.UnregisterAction(rpcID + "onmousescroll");
		}
	}
#endif

Question

• What is the status of event support in SVG-NET?
• With supports for .NET 4 and later in SVG-NET, can we remove the preprocessor and enable it for all?

[mrbean-bremen]

I don't know anything about the state of event support.
Looking at the history, this has been implemented by @tebjan in 2013, and the #ifdef NET4 has been added later (2014) to allow .NET 3.5 support, so this is certainly not needed anymore.