cube-game-plus-plus/client/gui/BaseGUI.cpp

#include "client/gui/BaseGUI.h"

static const Color4 INPUT_BACKGROUND(0x00, 0x00, 0x00, 0xA0);
static const Color4 INPUT_BACKGROUND_2(0x00, 0x00, 0x00, 0x80);
const Vector2 BaseGUI::FIXED_SIZE(400.0f, 300.0f);

BaseGUI::BaseGUI(const Size& size, TextInput*& textInput,
                 const Controller& controller)
    : size(size), textInput(textInput), controller(controller) {
}

void BaseGUI::tick() {
    if(controller.leftClick.wasReleased()) {
        Vector2 mousePos = controller.getMouse() / scale;
        for(Input& input : inputs) {
            if(isIn(input.pos, input.size, mousePos)) {
                textInput = &input.text;
                textInput->setActive(true);
                break;
            }
        }
    }
}

void BaseGUI::updateScale(ShaderMatrix& sm) {
    scale = static_cast<int>(
        std::min(size.width / FIXED_SIZE[0], size.height / FIXED_SIZE[1]));
    scale = scale < 1.0f ? 1.0f : scale;
    scaledSize = Vector2(size.width / scale, size.height / scale);
    sm.scale(scale).update();
}

void BaseGUI::render(float, ShaderMatrix&, Renderer& r) {
    Vector2 mousePos = controller.getMouse() / scale;
    for(Input& input : inputs) {
        input.text.setLimit(r.charsInSpace(input.size[0] - 20.0f));
        if(isIn(input.pos, input.size, mousePos)) {
            r.drawRectangle(input.pos, input.size, INPUT_BACKGROUND_2);
        } else {
            r.drawRectangle(input.pos, input.size, INPUT_BACKGROUND);
        }
        StringBuffer<256> text(input.text);
        Vector2 size = r.getStringSize(text);
        Vector2 pos = input.pos + (input.size - size) * 0.5f;
        drawString(r, pos, text);
        if(textInput == &input.text) {
            Vector2 cursor = r.getStringSize(text, input.text.getCursor());
            drawString(r, Vector2(pos[0] + cursor[0], pos[1] + 2.0f), "&292_");
            drawString(r, Vector2(pos[0] + cursor[0], pos[1] + 3.0f), "&292_");
        }
    }
}

Vector2 BaseGUI::round(const Vector2& v) const {
    return Vector2(static_cast<int>(v[0] * scale) / scale,
                   static_cast<int>(v[1] * scale) / scale);
}

void BaseGUI::drawString(Renderer& r, const Vector2& pos, const char* s) {
    r.drawString(round(pos), s);
}

BaseGUI::Input& BaseGUI::addInput() {
    inputs.add();
    return inputs[inputs.getLength() - 1];
}

void BaseGUI::drawCenteredString(Renderer& r, const Vector2& pos,
                                 const Vector2& size, const char* text) {
    Vector2 textSize = r.getStringSize(text);
    drawString(r, pos + (size - textSize) * 0.5f, text);
}

bool BaseGUI::isIn(const Vector2& pos, const Vector2& size,
                   const Vector2& point) const {
    Vector2 end = pos + size;
    return pos[0] <= point[0] && point[0] <= end[0] && pos[1] <= point[1] &&
           point[1] <= end[1];
}