settings menu update + UINode 'enabled' property

src/graphics/ui/elements/Button.cpp

@@ -79,7 +79,11 @@ void Button::drawBackground(const DrawContext* pctx, Assets* assets) {
     glm::vec2 pos = calcPos();
     auto batch = pctx->getBatch2D();
     batch->texture(nullptr);
-    batch->setColor(isPressed() ? pressedColor : (hover ? hoverColor : color));
+    if (enabled) {
+        batch->setColor(isPressed() ? pressedColor : (hover ? hoverColor : color));
+    } else {
+        batch->setColor({color.r, color.g, color.b, color.a * 0.5f});
+    }
     batch->rect(pos.x, pos.y, size.x, size.y);
 }
 

src/graphics/ui/elements/Container.cpp

@@ -11,7 +11,7 @@ Container::Container(glm::vec2 size) : UINode(size) {
 }
 
 std::shared_ptr<UINode> Container::getAt(glm::vec2 pos, std::shared_ptr<UINode> self) {
-    if (!interactive) {
+    if (!interactive || !enabled) {
         return nullptr;
     }
     if (!isInside(pos)) return nullptr;

src/graphics/ui/elements/UINode.cpp

@@ -20,6 +20,18 @@ void UINode::setVisible(bool flag) {
     visible = flag;
 }
 
+void UINode::setEnabled(bool flag) {
+    enabled = flag;
+    if (!flag) {
+        defocus();
+        hover = false;
+    }
+}
+
+bool UINode::isEnabled() const {
+    return enabled;
+}
+
 Align UINode::getAlign() const {
     return align;
 }
@@ -82,7 +94,7 @@ bool UINode::isInside(glm::vec2 point) {
 }
 
 std::shared_ptr<UINode> UINode::getAt(glm::vec2 point, std::shared_ptr<UINode> self) {
-    if (!interactive) {
+    if (!interactive || !enabled) {
         return nullptr;
     }
     return isInside(point) ? self : nullptr;

src/graphics/ui/elements/UINode.hpp

@@ -1,14 +1,15 @@
 #ifndef GRAPHICS_UI_ELEMENTS_UINODE_H_
 #define GRAPHICS_UI_ELEMENTS_UINODE_H_
 
+#include "../../../delegates.h"
+#include "../../../window/input.h"
+
 #include <glm/glm.hpp>
 #include <vector>
 #include <memory>
 #include <string>
 #include <functional>
 #include <unordered_map>
-#include "../../../delegates.h"
-#include "../../../window/input.h"
 
 class DrawContext;
 class Assets;
@@ -60,6 +61,8 @@ namespace gui {
         glm::vec4 pressedColor {1.0f};
         /// @brief element margin (only supported for Panel sub-nodes)
         glm::vec4 margin {1.0f};
+        /// @brief element enabled state
+        bool enabled = true;
         /// @brief is element visible
         bool visible = true;
         /// @brief is mouse over the element
@@ -95,6 +98,9 @@ namespace gui {
         virtual void setVisible(bool flag);
         bool isVisible() const;
 
+        virtual void setEnabled(bool flag);
+        bool isEnabled() const;
+
         virtual void setAlign(Align align);
         Align getAlign() const;
 

src/graphics/ui/gui_xml.cpp

@@ -87,6 +87,9 @@ static void _readUINode(UiXmlReader& reader, xml::xmlelement element, UINode& no
     if (element->has("visible")) {
         node.setVisible(element->attr("visible").asBool());
     }
+    if (element->has("enabled")) {
+        node.setEnabled(element->attr("enabled").asBool());
+    }
     if (element->has("position-func")) {
         node.setPositionFunc(scripting::create_vec2_supplier(
             reader.getEnvironment(),

src/logic/scripting/lua/libgui.cpp

@@ -304,6 +304,9 @@ static int l_gui_getattr(lua_State* L) {
     } else if (attr == "visible") {
         lua_pushboolean(L, node->isVisible());
         return 1;
+    } else if (attr == "enabled") {
+        lua_pushboolean(L, node->isEnabled());
+        return 1;
     }
 
     if (getattr(L, dynamic_cast<Container*>(node), attr))
@@ -350,6 +353,8 @@ static int l_gui_setattr(lua_State* L) {
         node->setInteractive(lua_toboolean(L, 4));
     } else if (attr == "visible") {
         node->setVisible(lua_toboolean(L, 4));
+    } else if (attr == "enabled") {
+        node->setEnabled(lua_toboolean(L, 4));
     } else {
         if (setattr(L, dynamic_cast<Button*>(node), attr))
             return 0;