Sdk/BaseWidget: Add HasFocus method

SDK/include/NDK/BaseWidget.hpp

@@ -56,6 +56,8 @@ namespace Ndk
 			inline const Nz::Vector2f& GetContentSize() const;
 			inline Nz::Vector2f GetSize() const;
 
+			bool HasFocus() const;
+
 			inline bool IsVisible() const;
 
 			virtual void ResizeToContent() = 0;

SDK/include/NDK/Canvas.hpp

@@ -36,6 +36,8 @@ namespace Ndk
 		protected:
 			inline void ClearKeyboardOwner(std::size_t canvasIndex);
 
+			inline bool IsKeyboardOwner(std::size_t canvasIndex) const;
+
 			inline void NotifyWidgetBoxUpdate(std::size_t index);
 			inline void NotifyWidgetCursorUpdate(std::size_t index);
 

SDK/include/NDK/Canvas.inl

@@ -52,6 +52,11 @@ namespace Ndk
 			SetKeyboardOwner(InvalidCanvasIndex);
 	}
 
+	inline bool Canvas::IsKeyboardOwner(std::size_t canvasIndex) const
+	{
+		return m_keyboardOwner == canvasIndex;
+	}
+
 	inline void Canvas::NotifyWidgetBoxUpdate(std::size_t index)
 	{
 		WidgetBox& entry = m_widgetBoxes[index];

SDK/src/NDK/BaseWidget.cpp

@@ -79,7 +79,7 @@ namespace Ndk
 		{
 			m_backgroundSprite = Nz::Sprite::New();
 			m_backgroundSprite->SetColor(m_backgroundColor);
-			m_backgroundSprite->SetMaterial(Nz::Material::New((m_backgroundColor.IsOpaque()) ? "Basic2D" : "Translucent2D"));
+			m_backgroundSprite->SetMaterial(Nz::Material::New((m_backgroundColor.IsOpaque()) ? "Basic2D" : "Translucent2D")); //< TODO: Use a shared material instead of creating one everytime
 
 			m_backgroundEntity = CreateEntity();
 			m_backgroundEntity->AddComponent<GraphicsComponent>().Attach(m_backgroundSprite, -1);
@@ -94,6 +94,18 @@ namespace Ndk
 		}
 	}
 
+	/*!
+	* \brief Checks if this widget has keyboard focus
+	* \return true if widget has keyboard focus, false otherwhise
+	*/
+	bool BaseWidget::HasFocus() const
+	{
+		if (!IsRegisteredToCanvas())
+			return false;
+
+		return m_canvas->IsKeyboardOwner(m_canvasIndex);
+	}
+
 	void BaseWidget::SetBackgroundColor(const Nz::Color& color)
 	{
 		m_backgroundColor = color;