Move UI folder

UI/UI_textbox.cpp

@@ -0,0 +1,44 @@
+#include "UI_textbox.hpp"
+
+UI_textbox::UI_textbox(std::string hint, Color fg_color, Color bg_color, QObject *parent)
+    : UI_item(UI_TEXTBOX_TYPE, "", 0, fg_color, bg_color, parent), m_hint(hint)
+{
+}
+
+UI_textbox::UI_textbox(const json &j, QObject *parent) : UI_item(UI_TEXTBOX_TYPE, parent)
+{
+    from_json(j);
+}
+
+void UI_textbox::set_text(std::string text)
+{
+    if (text == m_text)
+        return;
+    m_text = text;
+    emit value_changed();
+    emit on_change(m_text);
+}
+
+void UI_textbox::set_hint(std::string hint)
+{
+    m_hint = hint;
+    emit value_changed();
+}
+
+std::string UI_textbox::hint() const
+{
+    return m_hint;
+}
+
+void UI_textbox::from_json(const json &j)
+{
+    UI_item::from_json(j);
+    m_hint = j.at("hint");
+}
+
+json UI_textbox::to_json(size_t id) const
+{
+    json j = UI_item::to_json(id);
+    j["hint"] = m_hint;
+    return j;
+}