color-preview.h

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Authors:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *   Ralf Stephan <ralf@ark.in-berlin.de>
 *   Michael Kowalski
 *
 * Copyright (C) 2001-2005 Authors
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
 
#ifndef SEEN_COLOR_PREVIEW_H
#define SEEN_COLOR_PREVIEW_H
 
#include <cairomm/pattern.h>
#include <cstdint>
#include <cairomm/refptr.h>
#include <gtkmm/drawingarea.h>
 
namespace Cairo {
class Context;
} // namespace Cairo
 
namespace Inkscape::UI::Widget {
 
class ColorPreview final : public Gtk::DrawingArea {
public:
    ColorPreview(std::uint32_t rgba);
    // set preview color RGBA with opacity (alpha)
    void setRgba32(std::uint32_t rgba);
    // set arbitrary pattern-based preview
    void setPattern(Cairo::RefPtr<Cairo::Pattern> pattern);
    // simple color patch vs outlined color patch
    enum Style { Simple, Outlined };
    void setStyle(Style style);
    // add indicator on top of the preview: swatch or spot color
    enum Indicator { None, Swatch, SpotColor };
    void setIndicator(Indicator indicator);
private:
    std::uint32_t _rgba; // requested RGBA color, used if there is no pattern given
    Cairo::RefPtr<Cairo::Pattern> _pattern; // pattern to show, if provided
    Style _style = Simple;
    Indicator _indicator = None;
    void draw_func(Cairo::RefPtr<Cairo::Context> const &cr, int width, int height);
};
 
} // namespace Inkscape::UI::Widget
 
#endif // SEEN_COLOR_PREVIEW_H
 
/*
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  mode:c++
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  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
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  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :