Extract XCUI selection model and layout lab click selection

engine/src/UI/Widgets/UISelectionModel.cpp

@@ -0,0 +1,49 @@
+#include <XCEngine/UI/Widgets/UISelectionModel.h>
+
+namespace XCEngine {
+namespace UI {
+namespace Widgets {
+
+bool UISelectionModel::HasSelection() const {
+    return !m_selectedId.empty();
+}
+
+const std::string& UISelectionModel::GetSelectedId() const {
+    return m_selectedId;
+}
+
+bool UISelectionModel::IsSelected(std::string_view id) const {
+    return !m_selectedId.empty() && m_selectedId == id;
+}
+
+bool UISelectionModel::SetSelection(std::string selectionId) {
+    if (m_selectedId == selectionId) {
+        return false;
+    }
+
+    m_selectedId = std::move(selectionId);
+    return true;
+}
+
+bool UISelectionModel::ClearSelection() {
+    if (m_selectedId.empty()) {
+        return false;
+    }
+
+    m_selectedId.clear();
+    return true;
+}
+
+bool UISelectionModel::ToggleSelection(std::string selectionId) {
+    if (m_selectedId == selectionId) {
+        m_selectedId.clear();
+        return true;
+    }
+
+    m_selectedId = std::move(selectionId);
+    return true;
+}
+
+} // namespace Widgets
+} // namespace UI
+} // namespace XCEngine