rotateable.h

Go to the documentation of this file.

// 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 <gtk/gtk.h> // GtkEventController*
#include <gtkmm/box.h>
#include <gtkmm/gesture.h> // Gtk::EventSequenceState
 
namespace Gtk {
class GestureClick;
class EventControllerMotion;
class EventControllerScroll;
} // namespace Gtk
 
namespace Inkscape::UI::Widget {
 
class Rotateable: public Gtk::Box
{
public:
    Rotateable();
    ~Rotateable() override;
 
    double axis;
    double current_axis;
    double maxdecl;
    bool scrolling;
 
private:
    double drag_started_x;
    double drag_started_y;
    unsigned modifier;
    bool dragging;
    bool working;
 
    static unsigned get_single_modifier(unsigned old, unsigned state);
 
    Gtk::EventSequenceState on_click  (Gtk::GestureClick const &click,
                                       int n_press, double x, double y);
    Gtk::EventSequenceState on_release(Gtk::GestureClick const &click,
                                       int n_press, double x, double y);
    void on_motion(Gtk::EventControllerMotion const &motion, double  x, double  y);
    bool on_scroll(Gtk::EventControllerScroll const &scroll, double dx, double dy);
 
    virtual void do_motion (double /*by*/, unsigned /*state*/) {}
    virtual void do_release(double /*by*/, unsigned /*state*/) {}
    virtual void do_scroll (double /*by*/, unsigned /*state*/) {}
};
 
} // namespace Inkscape::UI::Widget
 
#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 :