Move UI folder

UI/UI_checkbox.cpp

@@ -0,0 +1,51 @@
+#include "UI_checkbox.hpp"
+
+UI_checkbox::UI_checkbox(QObject *parent) : UI_item(UI_CHECKBOX_TYPE, parent), m_checked()
+{
+}
+
+UI_checkbox::UI_checkbox(std::string text, Color fg_color, Color bg_color, QObject *parent)
+    : UI_item(UI_CHECKBOX_TYPE, text, 0, fg_color, bg_color, parent), m_checked(false)
+{
+}
+
+UI_checkbox::UI_checkbox(const json &j, QObject *parent) : UI_item(UI_CHECKBOX_TYPE, parent), m_checked()
+{
+    from_json(j);
+}
+
+void UI_checkbox::click()
+{
+    m_checked = !m_checked;
+    emit value_changed();
+    emit on_change(m_checked);
+}
+
+void UI_checkbox::set_state(bool state)
+{
+    m_checked = state;
+    emit value_changed();
+    emit on_change(m_checked);
+}
+
+bool UI_checkbox::state() const
+{
+    return m_checked;
+}
+
+void UI_checkbox::from_json(const json &j)
+{
+    UI_item::from_json(j);
+
+    if (j.contains("checked"))
+    {
+        m_checked = j["checked"];
+    }
+}
+
+json UI_checkbox::to_json(size_t id) const
+{
+    json j = UI_item::to_json(id);
+    j["checked"] = m_checked;
+    return j;
+}