Engine settings UX update and basic functionality

Code/Tools/ProjectManager/Source/FormLineEditWidget.h

@@ -0,0 +1,60 @@
+/*
+* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+* its licensors.
+*
+* For complete copyright and license terms please see the LICENSE at the root of this
+* distribution (the "License"). All use of this software is governed by the License,
+* or, if provided, by the license below or the license accompanying this file. Do not
+* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*
+*/
+
+#pragma once
+
+#if !defined(Q_MOC_RUN)
+#include <QWidget>
+#endif
+
+QT_FORWARD_DECLARE_CLASS(QLineEdit)
+QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_FORWARD_DECLARE_CLASS(QFrame)
+QT_FORWARD_DECLARE_CLASS(QHBoxLayout)
+
+namespace AzQtComponents
+{
+    class StyledLineEdit;
+}
+
+namespace O3DE::ProjectManager
+{
+    class FormLineEditWidget
+        : public QWidget 
+    {
+        Q_OBJECT
+
+    public:
+        explicit FormLineEditWidget(const QString& labelText, const QString& valueText = "", QWidget* parent = nullptr);
+        ~FormLineEditWidget() = default;
+
+        //! Set the error message for to display when invalid.
+        void setErrorLabelText(const QString& labelText);
+
+        //! Returns a pointer to the underlying LineEdit.
+        QLineEdit* lineEdit() const;
+
+    protected:
+        QLabel* m_errorLabel = nullptr;
+        QFrame* m_frame = nullptr;
+        QHBoxLayout* m_frameLayout = nullptr;
+        AzQtComponents::StyledLineEdit* m_lineEdit = nullptr;
+
+    private slots:
+        void flavorChanged();
+        void onFocus();
+        void onFocusOut();
+
+    private:
+        void refreshStyle();
+    };
+} // namespace O3DE::ProjectManager