Design mode integration

Moved Qt Designer to open from Design Mode. Also, Design mode is now global,
and created in coreplugin. Other plugins can register themselves to it.

src/plugins/designer/formeditorstack.h

@@ -0,0 +1,87 @@
+/**************************************************************************
+**
+** 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 FORMEDITORSTACK_H
+#define FORMEDITORSTACK_H
+
+#include <QtGui/QStackedWidget>
+#include <QtCore/QList>
+#include <QtCore/QString>
+
+namespace Core {
+    class IEditor;
+}
+
+namespace Designer {
+class FormWindowEditor;
+
+namespace Internal {
+class DesignerXmlEditorEditable;
+
+/**
+  * A wrapper for Qt Designer form editors, so that they can be used in Design mode.
+  * FormEditorW owns an instance of this class, and creates new form editors when
+  * needed.
+  */
+class FormEditorStack : public QStackedWidget
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(FormEditorStack);
+public:
+    FormEditorStack();
+    ~FormEditorStack();
+    Designer::FormWindowEditor *createFormWindowEditor(DesignerXmlEditorEditable *xmlEditor);
+    bool removeFormWindowEditor(Core::IEditor *xmlEditor);
+    bool setVisibleEditor(Core::IEditor *xmlEditor);
+    Designer::FormWindowEditor *formWindowEditorForXmlEditor(Core::IEditor *xmlEditor);
+
+private slots:
+    void formChanged();
+    void reloadDocument();
+
+private:
+    void setFormEditorData(Designer::FormWindowEditor *formEditor, const QString &contents);
+
+    struct FormXmlData;
+    QList<FormXmlData*> m_formEditors;
+
+    FormXmlData *activeEditor;
+
+    struct FormXmlData {
+        DesignerXmlEditorEditable *xmlEditor;
+        Designer::FormWindowEditor *formEditor;
+        int widgetIndex;
+    };
+
+};
+
+}
+}
+
+#endif // FORMEDITORSTACK_H