CODEWITHSUNDEEP
c#copygeometryclonesystem.drawing
Joe Strout
Joe Strout

Reputation: 2741

How to clone a RectangleF

How do you easily clone (copy) a RectangleF in C#?

There are obviously inelegant ways to do it, such as new RectangleF(r.Location, r.size), but surely there's a .Copy or .Clone method hiding somewhere? But neither of those compiles for me, nor does there appear to be a copy constructor. I suspect there's some simple, C#-standard way of copying any struct, that I just haven't found yet.

In case it matters, my real objective is to make a method that returns an offset version of a rectangle (because, amazingly, RectangleF doesn't have such built in - it has only a mutator method). My best stab at this is:

public static RectangleF Offset(RectangleF r, PointF offset) {
    PointF oldLoc = r.Location;
    return new RectangleF(new PointF(oldLoc.X+offset.X, oldLoc.Y+offset.Y), r.Size);
}

(Made uglier than it should by be the astounding lack of an addition operator for PointF, but that's another issue.) Is there a simpler way to do this?

Upvotes: 2

Views: 2343

Answers (2)

MrMoDoJoJr
MrMoDoJoJr

Reputation: 410

RectangleF is a struct i.e. a value type. Consider the following:

public class Program
{
    struct S
    {
        public int i;
    }

    static void Main(string[] args)
    {
        S s1 = new S();
        S s2 = s1;

        s1.i = 5;

        Console.WriteLine(s1.i);
        Console.WriteLine(s2.i);
    }
}

The output is:

5
0

Because S is a struct i.e. s2 is a copy of s1.

Upvotes: 7

user180326
user180326

Reputation:

A Rect is a struct, a value type.

To clone it just assign it to a new variable.

Upvotes: 4

Related Questions