[Feature Request]Reflection based atributes

[jinsediaoying]

To bring this great project to a new level of freedom, we can add a bunch of reflection based attribute.
The basic concept is use field/property/method name as attribute param, and use reflection to retrieve the value and decide how to draw.

For example:

public class DynamicShowIfAttribute : Attribute
{
	public string showMethod;
	public string enableMethod;

	public DynamicShowIfAttribute (string showMethod, string enableMethod = null)
	{
		this.showMethod = showMethod;
	}
}

public class Foo
{
	[DynamicShowIf (nameof (showVal), nameof (EnableValFunc))]
	public int val;

	bool showVal = true;
	bool ShowVal => true;

	bool EnableValFunc ()
	{
		return true;
	}
}

[jinsediaoying]

More ideas:

public class DynamicShowIfAttribute : Attribute
{
	public string showMethod;
	public string enableMethod;

	public DynamicShowIfAttribute (string showMethod, string enableMethod = null)
	{
		this.showMethod = showMethod;
		this.enableMethod = enableMethod;//null for always true
	}
}

public class DynamicEnableIfAttribute : Attribute
{
	public string enableMethod;

	public DynamicEnableIfAttribute (string enableMethod)
	{
		this.enableMethod = enableMethod;
	}
}

[jinsediaoying]

/// <summary>
/// show help info box with dynamic text and info type
/// hide the info box is the textMethod return null
/// </summary>
public class DynamicInfoAttribute : Attribute
{
	//string type, return null for hide info box
	public string textMethod;
	public UnityMessageType messageType;

	//UnityMessageType type, will override messageType
	public string messageTypeMethod;

	public DynamicInfoAttribute (string textMethod, UnityMessageType messageType = UnityMessageType.Info)
	{
		this.textMethod = textMethod;
		this.messageType = messageType;
	}

	public DynamicInfoAttribute (string textMethod, string messageTypeMethod)
	{
		this.textMethod = textMethod;
		this.messageTypeMethod = messageTypeMethod;
	}
}

[jinsediaoying]

public class DynamicLabelAttribute : Attribute
{
	public string labelFunc;

	public DynamicLabelAttribute (string labelFunc)
	{
		this.labelFunc = labelFunc;
	}
}

public class DynamicTitleAttribute : Attribute
{
	public string labelFunc;

	public DynamicTitleAttribute (string labelFunc)
	{
		this.labelFunc = labelFunc;
	}
}

[arimger]

To be honest I wanted to minimize the usage of Reflection-based features but I understand that using properties and methods to stream data to drawers is pretty cool. I will think about it, thank you for this request.

[jinsediaoying]

A important use case is handle the class inheritance.
For example, I usually put a help info box on top of my scripts.
Without reflection based features, it is impossible to change that message in derived classes.

[arimger]

Hello,

wanted to say that feature is almost finished, if you are curious you can check the current implementation on the branch.
I need to test it a little bit, and in few days I will try to push it further.

[arimger]

Hello,

from now, all condition drawers (EnableIf, HideIf, etc.) are able to use members of the parent class to pass values:

[DisableIf(nameof(GetFloatValue), 2.0f, Comparison = UnityComparisonMethod.GreaterEqual)]
public int var2;

public float GetFloatValue()
{
	return 1.6f;
}