tools/designer/src/plugins/activeqt/qdesigneraxwidget.h
changeset 0 1918ee327afb
child 4 3b1da2848fc7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/designer/src/plugins/activeqt/qdesigneraxwidget.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,142 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QACTIVEXPLUGINOBJECT_H
+#define QACTIVEXPLUGINOBJECT_H
+
+#include <QtCore/QPointer>
+#include <QtCore/QMap>
+#include <QtGui/QWidget>
+#include <QtGui/QPixmap>
+
+QT_BEGIN_NAMESPACE
+
+class QAxWidget;
+
+/* QDesignerAxWidget aggregates QAxWidget to keep it out of the event loop while applying
+ * properties directly.
+ * Thus, it is possible to set property values in designer that are out of range
+ * for the control, which might cause it to throw exceptions.
+ *
+ * QDesignerAxWidget is the base class following the internal naming
+ * conventions that makes the control property visible to the introspection interface.
+ *
+ * The trick to aggregate a QAxWidget is to overwrite the metaObject() function
+ * generated by moc to return the QMetaObject of QAxWidget. This is what QDesignerAxPluginWidget does. */
+
+class QDesignerAxWidget : public QWidget
+{
+    Q_OBJECT
+    Q_PROPERTY(QString control READ control WRITE setControl RESET resetControl DESIGNABLE true)
+    Q_DISABLE_COPY(QDesignerAxWidget)
+
+protected:
+    explicit QDesignerAxWidget(QWidget *parent);
+
+public:
+    virtual ~QDesignerAxWidget();
+
+    bool loadControl(const QString &clsid);
+
+    void resetControl();
+    void setControl(const QString &clsid);
+    QString control() const;
+
+    QSize sizeHint() const;
+    QSize minimumSizeHint() const;
+
+    bool loaded() { return (m_axobject != 0); }
+
+    static QPixmap widgetIcon();
+
+    enum { DrawIndicator = 0x1, DrawFrame = 0x2, DrawControl = 0x4 };
+
+    unsigned drawFlags() const { return m_drawFlags; }
+    void setDrawFlags(unsigned f)  { m_drawFlags = f; }
+
+protected:
+    void paintEvent(QPaintEvent *event);
+    QAxWidget *axobject() const { return m_axobject; }
+
+private:
+    const QSize m_defaultSize;
+    unsigned m_drawFlags;
+    QAxWidget *m_axobject;
+    QPixmap m_axImage;
+};
+
+class QDesignerAxPluginWidget : public QDesignerAxWidget
+{
+   // No Q_OBJECT here! - meta functionality is overriden
+public:
+    explicit QDesignerAxPluginWidget(QWidget *parent);
+    virtual ~QDesignerAxPluginWidget();
+
+    virtual const QMetaObject *metaObject() const;
+    virtual int qt_metacall(QMetaObject::Call, int, void **);
+
+private:
+    QMap<int, bool> m_propValues;
+};
+
+#if defined Q_CC_MSVC && _MSC_VER < 1300
+template <> inline QDesignerAxWidget *qobject_cast_helper<QDesignerAxWidget*>(QObject *o,  QDesignerAxWidget*)
+#else
+template <> inline QDesignerAxWidget *qobject_cast<QDesignerAxWidget*>(QObject *o)
+#endif
+{
+    if (!o)
+        return 0;
+
+    // Unloaded state
+    if (strcmp(o->metaObject()->className(), "QDesignerAxWidget") == 0)
+        return static_cast<QDesignerAxPluginWidget*>(o);
+
+    // Loaded state with fake meta object
+    if (strcmp(o->metaObject()->className(), "QAxWidget") == 0)
+        return static_cast<QDesignerAxPluginWidget*>(o);
+
+    return 0;
+}
+
+QT_END_NAMESPACE
+
+#endif // ACTIVEQT_EXTRAINFO_H