UITextInput.hpp

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/*============================================================================*/
#ifndef SHISHGL_UI_TEXT_INPUT_HPP
#define SHISHGL_UI_TEXT_INPUT_HPP
/*============================================================================*/
#include <cctype>
 
#include "UILabel.hpp"
#include "Clickable.hpp"
#include "KeyboardEvent.hpp"
/*============================================================================*/
namespace Sh {
 
    class TextField : public Clickable {
    public:
 
        explicit TextField(UIWindow* target, char* input_buf,
                           size_t input_buf_size)
                : Clickable(target)
                , buf(input_buf)
                , buf_size(input_buf_size)
                , curr_pos(0) {
           SubscriptionManager::subscribe(this, EventSystem::SystemEvents,
                                          KEYBOARD);
        }
 
        void reactOnPress(MouseButtonEvent&) override {
            curr_active = target<UIWindow>();
        }
 
        bool onKeyboard(KeyboardEvent& event) override {
 
            if (target<UIWindow>() != curr_active) {
                return false;
            }
 
            if (event.state() == Keyboard::UP) {
                return false;
            }
 
            if (curr_pos < buf_size && Keyboard::isConvertible(event.key())) {
 
                char to_set = Keyboard::convertToChar(event.key());
 
                if (event.modifiers() & Keyboard::L_SHIFT_MOD) {
                    to_set = static_cast<char>(toupper(to_set));
                }
 
                buf[curr_pos++] = to_set;
                return true;
 
            } else if (event.key() == Keyboard::BACKSPACE) {
 
                if (curr_pos) {
                    buf[--curr_pos] = 0;
                }
                return true;
 
            } else if (curr_pos < buf_size) {
 
                buf[curr_pos++] = '*';
 
            }
 
            return false;
        }
 
    private:
 
        char* buf;
        size_t buf_size;
        size_t curr_pos;
 
        static UIWindow* curr_active;
    };
 
    class UITextInput : public UILabel {
    public:
 
        UITextInput(const Frame& frame, char* buffer, size_t buffer_size)
                : UILabel(frame, std::string_view(buffer, buffer_size)) {
            addBehavior<TextField>(buffer, buffer_size);
        }
 
    };
 
}
/*============================================================================*/
#endif //SHISHGL_UI_TEXT_INPUT_HPP
/*============================================================================*/