Properties for attributes of complex objects

[Stonehead]

Can someone tell me how to make a property for an attribute of an object?

To be more precise, I want to make properties for X and Y attributes of Vector2 object.

How do I do that?


Vector2 Position {
set {...}
get {...}
}


... works only on the whole object. I want to do the same with its attributes: X and Y.

Thanks! ^^

[BigEd781]

Just wrap them each in their own property. The reason it does not work for x and y is because Vector2 is a value type, so you are returning a copy when you call foo.Position.X. Just make a new property and set the private member yourself.


Vector2 Position { get; set; }

int PositionX
{
get { return Position.X; }
set { Position = new Vector2( value, Position.Y ); }
}

// same for y

[Arjay]

If you return the whole Vector object, can't you access its Position members?

[BigEd781]

If you return the whole Vector object, can't you access its Position members?

He wants to set them though. Since Vector2 is a value type (like Point), you can expose it as a property and then, from calling code, set only a member of the object.


int x = Position.X; // works fine of course
x +=1;
Position.X = x; // doesn't work, a copy is returned