init config opt system w/ 3 types and description support

src/ui/ui_elements.cpp

@@ -0,0 +1,50 @@
+#include "ui_elements.h"
+#include "librecomp/config_store.hpp"
+
+struct RecompElementConfig {
+    Rml::String tag;
+    std::unique_ptr<Rml::ElementInstancer> instancer;
+};
+
+#define CUSTOM_ELEMENT(s, e) { s, std::make_unique< Rml::ElementInstancerGeneric< e > >() }
+
+static RecompElementConfig custom_elements[] = {
+    CUSTOM_ELEMENT("recomp-description", recompui::ElementDescription),
+    CUSTOM_ELEMENT("recomp-config-group", recompui::ElementConfigGroup),
+    CUSTOM_ELEMENT("recomp-config-option", recompui::ElementConfigOption),
+    CUSTOM_ELEMENT("recomp-option-type-checkbox", recompui::ElementOptionTypeCheckbox),
+    CUSTOM_ELEMENT("recomp-option-type-radio-tabs", recompui::ElementOptionTypeRadioTabs),
+    CUSTOM_ELEMENT("recomp-option-type-range", recompui::ElementOptionTypeRange),
+};
+
+void recompui::register_custom_elements() {
+    recomp::set_config_store_value_and_default("ligma_balls", "hello!", "whats up");
+    recomp::set_config_store_default_value("ligma_balls2", "12345");
+    recomp::set_config_store_value("ligma_balls3", "hello!");
+    for (auto& element_config : custom_elements) {
+        Rml::Factory::RegisterElementInstancer(element_config.tag, element_config.instancer.get());
+    }
+}
+
+Rml::ElementInstancer* recompui::get_custom_element_instancer(std::string tag) {
+    for (auto& element_config : custom_elements) {
+        if (tag == element_config.tag) {
+            return element_config.instancer.get();
+        }
+    }
+    return nullptr;
+}
+
+Rml::ElementPtr recompui::create_custom_element(Rml::Element* parent, std::string tag) {
+    auto instancer = recompui::get_custom_element_instancer(tag);
+    const Rml::XMLAttributes attributes = {};
+    if (Rml::ElementPtr element = instancer->InstanceElement(parent, tag, attributes))
+    {
+        element->SetInstancer(instancer);
+        element->SetAttributes(attributes);
+
+        return element;
+    }
+
+    return nullptr;
+}