1 files changed, 71 insertions, 0 deletions
diff --git a/src/ui/widget/rotateable.h b/src/ui/widget/rotateable.h
new file mode 100644
index 0000000..c174a09
--- /dev/null
+++ b/src/ui/widget/rotateable.h
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ *   buliabyak@gmail.com
+ *
+ * Copyright (C) 2007 authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_ROTATEABLE_H
+#define INKSCAPE_UI_ROTATEABLE_H
+
+#include <gtkmm/box.h>
+#include <gtkmm/eventbox.h>
+#include <glibmm/i18n.h>
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+/**
+ * Widget adjustable by dragging it to rotate away from a zero-change axis.
+ */
+class Rotateable: public Gtk::EventBox
+{
+public:
+    Rotateable();
+
+    ~Rotateable() override;
+
+    bool on_click(GdkEventButton *event);
+    bool on_motion(GdkEventMotion *event);
+    bool on_release(GdkEventButton *event);
+    bool on_scroll(GdkEventScroll* event);
+
+    double axis;
+    double current_axis;
+    double maxdecl;
+    bool scrolling;
+
+private:
+    double drag_started_x;
+    double drag_started_y;
+    guint modifier;
+    bool dragging;
+    bool working;
+
+  guint get_single_modifier(guint old, guint state);
+
+    virtual void do_motion (double /*by*/, guint /*state*/) {}
+    virtual void do_release (double /*by*/, guint /*state*/) {}
+    virtual void do_scroll (double /*by*/, guint /*state*/) {}
+};
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_ROTATEABLE_H
+
+/*
+  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:textwidth=99 :