qtquick: Create ResizeHandlerHelper.qml to save some code

src/private/quick/qml/ResizeHandlerHelper.qml

@@ -0,0 +1,30 @@
+/*
+  This file is part of KDDockWidgets.
+
+  SPDX-FileCopyrightText: 2019-2021 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
+  Author: Sérgio Martins <sergio.martins@kdab.com>
+
+  SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+  Contact KDAB at <info@kdab.com> for commercial licensing options.
+*/
+
+import QtQuick 2.9
+import QtQuick.Controls 2.9
+import QtQuick.Layouts 1.9
+
+
+MouseArea {
+    id: root
+    property int resizeMargin: 2
+    property int shape
+    property bool resizeAllowed: true
+
+    hoverEnabled: true
+    width: resizeMargin
+    cursorShape: enabled ? shape : Qt.ArrowCursor // Even if disabled the MouseArea changes cursor, as it's different than Item.enabled, so explicitly change cursor if disabled
+    z: mouseArea.z + 1
+    enabled: resizeAllowed
+    onPressed: { mouse.accepted = false; }
+    onReleased: { mouse.accepted = false; }
+}