1 files changed, 81 insertions, 0 deletions
diff --git a/src/display/control/canvas-item-rotate.h b/src/display/control/canvas-item-rotate.h
new file mode 100644
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+++ b/src/display/control/canvas-item-rotate.h
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_CANVAS_ITEM_ROTATE_H
+#define SEEN_CANVAS_ITEM_ROTATE_H
+
+/**
+ * A class for previewing a canvas rotation.
+ */
+
+/*
+ * Author:
+ *   Tavmjong Bah
+ *
+ * Copyright (C) 2020 Tavmjong Bah
+ *
+ * Rewrite of RotateCanvasItem.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <2geom/point.h>
+#include <2geom/transforms.h>
+
+#include "canvas-item.h"
+
+class SPDesktop;
+
+namespace Inkscape {
+
+class CanvasRotate;
+
+namespace UI::Widget {
+class Canvas;
+}
+
+class CanvasItemGroup; // A canvas control that contains other canvas controls.
+
+class CanvasItemRotate : public CanvasItem {
+
+public:
+    CanvasItemRotate(CanvasItemGroup *group);
+
+    // Geometry
+    void update(Geom::Affine const &affine) override;
+    double closest_distance_to(Geom::Point const &p); // Maybe not needed
+
+    // Selection
+    bool contains(Geom::Point const &p, double tolerance = 0) override;
+
+    // Display
+    void render(Inkscape::CanvasItemBuffer *buf) override;
+
+    // Events
+    bool handle_event(GdkEvent *event) override;
+    void start(SPDesktop *desktop);
+    void paint();
+    
+
+protected:
+    SPDesktop *_desktop = nullptr;
+    Geom::Point _center;         // Center of screen.
+    Geom::Point _cursor;         // Position of cursor relative to center (after angle snapping).
+    double _current_angle = 0.0; // Rotation in degrees.
+    double _start_angle = -1000; // Initial angle, determined by cursor position.
+    Cairo::RefPtr<Cairo::ImageSurface> _surface_copy;    // Copy of original surface.
+};
+
+
+} // namespace Inkscape
+
+#endif // SEEN_CANVAS_ITEM_ROTATE_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 :