From 68a398836c0796f246c7934bbba0c1ccc678deae Mon Sep 17 00:00:00 2001
From: Markus Mertama <mertama@gmail.com>
Date: Mon, 23 Oct 2023 20:54:25 +0300
Subject: [PATCH] add RESIZE event const

---
 gempyrelib/include/gempyre.h |  7 +++++--
 gempyrelib/src/element.cpp   | 28 +++++++++++++++++++++++++++-
 2 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/gempyrelib/include/gempyre.h b/gempyrelib/include/gempyre.h
index 1dcb9fdf..96676d5d 100644
--- a/gempyrelib/include/gempyre.h
+++ b/gempyrelib/include/gempyre.h
@@ -89,6 +89,7 @@ namespace Gempyre {
             int height;
         };
         
+
     public:
         /// Copy constructor.
         Element(const Element& other) = default;
@@ -144,7 +145,7 @@ namespace Gempyre {
         /// @param value - attribute value
         /// @return this element
         Element& set_attribute(const std::string& attr, const std::string& value);
-         /// @brief Set HTML a attribute of this element
+        /// @brief Set HTML a attribute of this element
         /// @param attr - attribute name
         /// @return this element
         Element& set_attribute(const std::string& attr);
@@ -180,7 +181,7 @@ namespace Gempyre {
     /// @cond INTERNAL    
         const GempyreInternal& ref() const;
         GempyreInternal& ref();
-        static const std::string generateId(const std::string& prefix);        
+        static const std::string generateId(const std::string& prefix);
     protected:
         Ui* m_ui;
         std::string m_id;
@@ -225,6 +226,8 @@ namespace Gempyre {
         static constexpr auto  FOCUS_OUT = "focusout";
         /// Load
         static constexpr auto  LOAD = "load";
+        /// Resize - use ui.root().subscribe(Event::RESIZE, [... for window resize 
+        static constexpr auto  RESIZE = "resize"; 
        
         /// @brief element that has emitted the event, the same that did subscription.
         Element element;
diff --git a/gempyrelib/src/element.cpp b/gempyrelib/src/element.cpp
index fdf7fc30..baa598f8 100644
--- a/gempyrelib/src/element.cpp
+++ b/gempyrelib/src/element.cpp
@@ -7,6 +7,13 @@
 #include <chrono>
 #include <charconv>
 
+// helper type for the visitor #4
+template<class... Ts>
+struct overloaded : Ts... { using Ts::operator()...; };
+// explicit deduction guide (not needed as of C++20)
+template<class... Ts>
+overloaded(Ts...) -> overloaded<Ts...>;
+
 using namespace Gempyre;
 
 const std::string Element::generateId(const std::string& prefix) {
@@ -68,6 +75,25 @@ Element& Element::set_attribute(const std::string &attr) {
         "value", "true");
     return *this;
 }
+/*
+using AttrValueType = std::variant<bool, int, unsigned, float, double>;
+
+template <typename T>
+void Element::send(Element& el, const std::string& attr, const T& value) {
+    el.ref().send(el, "set_attribute",  "attribute", attr, "value", value);
+}
+
+Element& Element::set_attribute(const std::string& attr, const AttrValueType& value) {
+    std::visit(overloaded {
+        [&, this](const bool& v) {send(*this, attr, v);},
+        [&, this](const int& v) {send(*this, attr, v);},
+        [&, this](const double& v) {send(*this, attr, v);},
+        [&, this](const float& v) {send(*this, attr, v);},
+        [&, this](const unsigned& v) {send(*this, attr, v);},
+    }, value);
+    return *this;
+}
+*/
 
 Element& Element::remove_attribute(const std::string &attr) {
     ref().send(*this, "remove_attribute",
@@ -159,7 +185,7 @@ std::optional<Element> Element::parent() const {
         return m_ui->root();
     return Gempyre::Element(*m_ui, *pid);
 } 
-
+ 
 
 Element::~Element() {}