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diff --git a/src/ui/view/svg-view-widget.h b/src/ui/view/svg-view-widget.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * A light-weight widget containing an SPCanvas with for rendering an SVG.
+ */
+/*
+ * Authors:
+ *   Tavmjong Bah <tavmjong@free.fr>
+ *
+ * Copyright (C) 2018 Authors
+ *
+ * The contents of this file may be used under the GNU General Public License Version 2 or later.
+ * Read the file 'COPYING' for more information.
+ *
+ */
+
+#ifndef INKSCAPE_UI_SVG_VIEW_WIDGET_VARIATIONS_H
+#define INKSCAPE_UI_SVG_VIEW_WIDGET_VARIATIONS_H
+
+
+#include <gtkmm.h>
+
+class SPDocument;
+class SPCanvasGroup;
+class SPCanvasItem;
+
+namespace Inkscape {
+namespace UI {
+namespace View {
+
+/**
+ * A light-weight widget containing an SPCanvas for rendering an SVG.
+ */
+class SVGViewWidget : public Gtk::ScrolledWindow {
+
+public:
+    SVGViewWidget(SPDocument* document);
+    ~SVGViewWidget() override;
+    void setDocument(  SPDocument* document);
+    void setResize( int width, int height);
+
+private:
+    void size_allocate(Gtk::Allocation& allocation);
+
+    GtkWidget* _canvas;
+
+// From SVGView ---------------------------------
+
+public:
+    SPDocument*     _document;
+    unsigned int    _dkey;
+    SPCanvasGroup  *_parent;
+    SPCanvasItem   *_drawing;
+    double          _hscale;     ///< horizontal scale
+    double          _vscale;     ///< vertical scale
+    bool            _rescale;    ///< whether to rescale automatically
+    bool            _keepaspect;
+    double          _width;
+    double          _height;
+
+    /**
+     * Helper function that sets rescale ratio.
+     */
+    void doRescale();
+
+    /**
+     * Change cursor (used for links).
+     */
+    void mouseover();
+    void mouseout();
+
+};
+
+} // Namespace View
+} // Namespace UI
+} // Namespace Inkscape
+
+#endif // INKSCAPE_UI_SVG_VIEW_WIDGET
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8 :