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/coreplugin/designmode.h

@@ -0,0 +1,121 @@
+/**************************************************************************
+**
+** 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 DESIGNMODE_H
+#define DESIGNMODE_H
+
+#include <coreplugin/imode.h>
+#include <coreplugin/icorelistener.h>
+#include <coreplugin/editormanager/ieditor.h>
+
+#include <QWeakPointer>
+#include <QPair>
+#include <QStringList>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QStackedWidget;
+QT_END_NAMESPACE
+
+namespace Core {
+class EditorManager;
+class DesignMode;
+
+namespace Internal {
+
+class DesignModeCoreListener : public Core::ICoreListener
+{
+    Q_OBJECT
+public:
+    DesignModeCoreListener(DesignMode* mode);
+    bool coreAboutToClose();
+private:
+    DesignMode *m_mode;
+};
+
+} // namespace Internal
+
+/**
+  * A global mode for Design pane - used by Bauhaus (QML Designer) and
+  * Qt Designer. Other plugins can register themselves by registerDesignWidget()
+  * and giving a list of mimetypes that the editor understands, as well as an instance
+  * to the main editor widget itself.
+  */
+class CORE_EXPORT DesignMode : public Core::IMode
+{
+    Q_OBJECT
+
+public:
+    DesignMode(EditorManager *editorManager);
+    ~DesignMode();
+
+    void registerDesignWidget(QWidget *widget, const QStringList &mimeTypes,
+                              bool preferDesignMode = false);
+    void unregisterDesignWidget(QWidget *widget);
+    // IContext
+    QList<int> context() const;
+    QWidget *widget();
+
+    // IMode
+    QString displayName() const;
+    QIcon icon() const;
+    int priority() const;
+    QString id() const;
+
+signals:
+    void actionsUpdated(Core::IEditor *editor);
+
+private slots:
+    void currentEditorChanged(Core::IEditor *editor);
+    void updateActions();
+
+private:
+    Internal::DesignModeCoreListener *m_coreListener;
+    QWeakPointer<Core::IEditor> m_currentEditor;
+    bool m_isActive;
+
+    struct DesignEditorInfo {
+        int widgetIndex;
+        QStringList mimeTypes;
+        bool preferredMode;
+        QWidget *widget;
+    };
+
+    QList<DesignEditorInfo*> m_editors;
+
+    EditorManager *m_editorManager;
+    QStackedWidget *m_stackWidget;
+
+    friend class Internal::DesignModeCoreListener;
+};
+
+
+} // namespace Core
+
+#endif // DESIGNMODE_H