GUILabel.cpp

#include "GUILabel.h"

GUILabel::GUILabel(GUI* parent, const char* text, float size, glm::vec2 offset, glm::vec4 color)
{
    _parent = parent;
    _text = text;
    _size = size * SCALE_FACTOR;
    _offset = offset;
    _color = color;
    _visible = true;
}

GUILabel::GUILabel()
{
    _parent = nullptr;
    _text = "";
    _size = SCALE_FACTOR;
    _offset = glm::vec2(0.0f);
    _color = glm::vec4(1.0f);
    _visible = true;
}

GUILabel::~GUILabel()
{
}

void GUILabel::render(TextRenderer& renderer, TextShader* shader, int width, int height)
{
    //Don't render if not visible
    if(!_visible)
        return;

    glm::vec2 pos;
    if(_offset.x != 0.0f && _offset.y != 0.0f) {
        glm::vec2 textSize = renderer.getStringSize(_text, _size);
        pos = toPixelCoords(_parent->getOrigin(), width, height);

        pos.x -= textSize.x/2.0f;
    } else {
        pos = _offset;
    }

    renderer.renderText(shader, _text.c_str(), pos.x, pos.y, _size, _color);
}

glm::vec2 GUILabel::toPixelCoords(glm::vec2 coords, int width, int height)
{
    float fwidth = width * 1.0f;
    float fheight = height * 1.0f;

    glm::vec2 newCoords;

    if(coords.x < 0) {
        newCoords.x = (coords.x * fwidth) + fwidth;
    }
    else if(coords.x == 0) {
        newCoords.x = fwidth/2.0f;
    }
    else {
        newCoords.x = (coords.x * fwidth);
    }

    if(coords.y < 0) {
        newCoords.y = (coords.y * fheight) + fheight;
    }
    else if(coords.y == 0) {
        newCoords.y = fheight/2.0f;
    }
    else {
        newCoords.y = (coords.y * fheight);
    }

    return newCoords;
}