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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Ruler widget. Indicates horizontal or vertical position of a cursor in a specified widget.
*
* Copyright (C) 2019 Tavmjong Bah
*
* The contents of this file may be used under the GNU General Public License Version 2 or later.
*
*/
#ifndef INK_RULER_H
#define INK_RULER_H
/* Rewrite of the C Ruler. */
#include <gtkmm.h>
namespace Inkscape {
namespace Util {
class Unit;
}
}
namespace Inkscape {
namespace UI {
namespace Widget {
class Ruler : public Gtk::DrawingArea
{
public:
Ruler(Gtk::Orientation orientation);
void set_unit(Inkscape::Util::Unit const *unit);
void set_range(const double& lower, const double& upper);
void add_track_widget(Gtk::Widget& widget);
bool draw_marker_callback(GdkEventMotion* motion_event);
void size_request(Gtk::Requisition& requisition) const;
void get_preferred_width_vfunc( int& minimum_width, int& natural_width ) const override;
void get_preferred_height_vfunc(int& minimum_height, int& natural_height) const override;
protected:
bool draw_scale(const Cairo::RefPtr<::Cairo::Context>& cr);
void draw_marker(const Cairo::RefPtr<::Cairo::Context>& cr);
Cairo::RectangleInt marker_rect();
bool on_draw(const::Cairo::RefPtr<::Cairo::Context>& cr) override;
void on_style_updated() override;
private:
Gtk::Orientation _orientation;
Inkscape::Util::Unit const* _unit;
double _lower;
double _upper;
double _position;
double _max_size;
bool _backing_store_valid;
Cairo::RefPtr<::Cairo::Surface> _backing_store;
Cairo::RectangleInt _rect;
};
} // Namespace Inkscape
}
}
#endif // INK_RULER_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 :
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