Button added

[requizm]

#51

Features

• Interactive color changes with mouse.
• Text Alignment options
• Input Controls (OnMouseDown, OnMouseUp etc.)

Issues

• For now, we can't draw button with filled rectangle. Because since the rectangle is rendered first, we can't see the text below it. So we will render a empty rectangle until we fix the error.
• Text Colors seems sus. It doesn't show the same color as I want to draw. When clicking the button in the gif below, the rectangle successfully turns yellow, while the text does not completely change to yellow. Or i'm just confused.

Screenshots

I am open to discussion.

[requizm]

Example usage:

	SDL_Color red, blue, green;
	red.r = 200;
	red.g = 0;
	red.b = 0;
	red.a = 255;
	blue.r = 0;
	blue.g = 0;
	blue.b = 200;
	blue.a = 255;
	green.r = 0;
	green.g = 200;
	green.b = 0;
	green.a = 255;

	SDL_Color redHighlighted, blueHighlighted, greenHighlighted;
	red.r = 255;
	red.g = 0;
	red.b = 0;
	red.a = 255;
	blue.r = 0;
	blue.g = 0;
	blue.b = 255;
	blue.a = 255;
	green.r = 0;
	green.g = 255;
	green.b = 0;
	green.a = 255;

	Entity *entity = entityManager.addEntity("entity");
	Button *button = entity->addComponent<Button>("Text", siz, "opensans", TextAlignment::TOP_LEFT, red, blue);
	entity->getComponent<Transform>()->setPosition(250, 250);
	button->setButtonPressEffect(true);
	button->setButtonHoverColor(blueHighlighted);
	button->setButtonPressColor(greenHighlighted);
	button->setTextHoverColor(redHighlighted);
	button->setTextPressColor(green);

[JaimieVos]

@requizm thanks a lot for the big contribution, awesome! I did refactor a bit of the code because there was a lot of the BoxCollider2D class that was duplicated. With this code I don't have any problems with the colors like you mentioned. I really like how you made the text alignment.

I see the problem with the fill and the text disapearing under it. I don't think this is a quick fix so for now we could just let it be and I could open a bug issue for it. You should check out my refactored version of the code and let me know what you think and if you want to make any changes feel free to do so, if not let me know and then I will merge it.

Again big thanks for the contribution and if you ever want to pick up another issue or open one yourself if you have a cool idea feel free to do so!

[requizm]

@JelleVos1
Good job. But i have some things to say:

• Initially, I used the BoxCollider2D component. However, if we add the BoxCollider2D component to the entity, the user will not be able to add their own BoxCollider2D to that entity. That's why I wrote myself. In addition, BoxCollider2D component has functions such as collision control with other collider components; it would be better to write another Collider system for ui elements in the future.
• If we are going to use char* instead of std::string, we must also make these changes in the label class. While I was creating the Button class, I had copied everything from the label.

TLDR; You can merge it.

[JaimieVos]

@JelleVos1
Good job. But i have some things to say:

* Initially, I used the BoxCollider2D component. However, if we add the BoxCollider2D component to the entity, the user will not be able to add their own BoxCollider2D to that entity. That's why I wrote myself. In addition, BoxCollider2D component has functions such as collision control with other collider components; it would be better to write another Collider system for ui elements in the future.

* If we are going to use char* instead of std::string, we must also make these changes in the label class. While I was creating the Button class, I had copied everything from the label.

TLDR; You can merge it.

Oh I didn't know I used in the Label class before too. I will change that too. I think you have a good point about the collision system for in the future because then this will become an issue however now it was many duplicated code. I think your suggestion of building a second collider system for the UI is a very good idea and I will note that. For now I will merge it.

Big thanks for the contribution, you did a great job! Feel free to pick up or create other issues.