C＃Monogame-悬停时更改色彩

Question

I want to have a class that has the purpose of managing buttons in my game. So far I have the following code:

public class Button
{
    private SpriteFont btnFont;
    private string btnTxt;
    private Vector2 btnPos;
    private Color btnColour;

    public Button(SpriteFont newFont, string newTxt, Vector2 newPos, Color newColour)
    {
        btnFont = newFont;
        btnPos = newPos;
        btnTxt = newTxt;
        btnColour = newColour;
    }

    public void Draw(SpriteBatch spriteBatch)
    {
        spriteBatch.DrawString(btnFont, btnTxt, btnPos, btnColour);
    }
}

And the usage:

private Button btn_1;
private Color colour = new Color.CornflowerBlue;
private Rectangle buttonArea_1 = new Rectangle(24, 300, 192, 39);
// LoadContent() Method:
btn_1 = new Button(Game1.defaultFontBig, "Play Game", new Vector2(24, 300), colour);
// Update() Method:
MouseState mouseState = Mouse.GetState();
Point mousePosition = new Point(mouseState.X, mouseState.Y);
if (buttonArea_1.Contains(mousePosition))
{
    colour = Color.Yellow;
    if (mouseState.LeftButton == ButtonState.Pressed)
    {
        Game1.currentGameState = Game1.gameStates.loadingScreen;
    }
}
else
{
    colour = Color.CornflowerBlue;
}
// Draw Method():
btn_1.Draw(spriteBatch);

But something goes wrong... When I test the game and I hover on the button it doesn't change its color from cornflower blue to yellow but still changes the game state as I click on it. I feel like this is some kind of simple initialization thing I'm missing so I'm asking for your help. Any code examples/approaches explained would be great.

EDIT:

Via properties like this?

public Color Colour
{
    public get { return colour; }
    private set { colour = value; }
}

But the does the usage change? Can I still pass in the colour to the constructor and change it in Update() ?

Answer 1

Instead of:

private Color btnColour;

in the button class, do this:

public Color btnColour { get; set; }

then in the usage code, instead of this:

colour = Color.Yellow;

do this:

btn_1.colour = Color.Yellow;

and:

btn_1.colour = Color.CornflowerBlue;