Design mode/Qt Designer clean-up, part III: Resources.

Move resource code to new ResourceHandler class and
instantiate it on the form window.

src/plugins/designer/resourcehandler.h

@@ -0,0 +1,83 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef RESOURCEHANDLER_H
+#define RESOURCEHANDLER_H
+
+#include <QtCore/QObject>
+#include <QtCore/QStringList>
+
+QT_BEGIN_NAMESPACE
+namespace qdesigner_internal {
+    class FormWindowBase;
+}
+QT_END_NAMESPACE
+
+namespace ProjectExplorer {
+class SessionNode;
+class NodesWatcher;
+}
+
+namespace Designer {
+namespace Internal {
+
+/* ResourceHandler: Constructed on a form window and activated on open/save as
+ * (see README.txt). The form can have 2 states:
+ * 1) standalone: Uses the form editor's list of resource files.
+ * 2) Within a project: Use the list of resources files of the projects.
+ *
+ * When initializing, store the original list of qrc files of the form and
+ * connect to various signals of the project explorer to re-check.
+ * In updateResources, check whether the form is part of a project and use
+ * the project's resource files or the stored ones. */
+
+class ResourceHandler : public QObject
+{
+    Q_OBJECT
+public:
+    explicit ResourceHandler(qdesigner_internal::FormWindowBase *fw);
+    virtual ~ResourceHandler();
+
+public slots:
+    void updateResources();
+
+private:
+    void ensureInitialized();
+
+    qdesigner_internal::FormWindowBase * const m_form;
+
+    QStringList m_originalUiQrcPaths;
+    ProjectExplorer::SessionNode *m_sessionNode;
+    ProjectExplorer::NodesWatcher *m_sessionWatcher;
+};
+
+} // namespace Internal
+} // namespace Designer
+
+#endif // RESOURCEHANDLER_H