textwidget.h

/*
 * Copyright (C) 2018 Microchip Technology Inc.  All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef EGT_TEXTWIDGET_H
#define EGT_TEXTWIDGET_H
 
#include <egt/detail/meta.h>
#include <egt/image.h>
#include <egt/signal.h>
#include <egt/widget.h>
#include <memory>
#include <string>
 
namespace egt
{
inline namespace v1
{
 
class EGT_API TextWidget : public Widget
{
public:
 
    Signal<> on_text_changed;
    explicit TextWidget(std::string text = {},
                        const Rect& rect = {},
                        const AlignFlags& text_align = AlignFlag::center) noexcept;
 
    explicit TextWidget(Serializer::Properties& props) noexcept
        : TextWidget(props, false)
    {
    }
 
protected:
 
    explicit TextWidget(Serializer::Properties& props, bool is_derived) noexcept;
 
public:
 
    virtual void text(const std::string& str);
 
    virtual void clear();
 
    EGT_NODISCARD virtual const std::string& text() const { return m_text; }
 
    void text_align(const AlignFlags& align)
    {
        if (detail::change_if_diff<>(m_text_align, align))
            damage();
    }
 
    EGT_NODISCARD AlignFlags text_align() const { return m_text_align; }
 
    EGT_NODISCARD virtual size_t len() const;
 
    static Font scale_font(const Size& target, const std::string& text, const Font& font);
 
    void serialize(Serializer& serializer) const override;
 
protected:
 
    EGT_NODISCARD Size text_size(const std::string& text) const;
 
    AlignFlags m_text_align{AlignFlag::center};
 
    std::string m_text;
 
private:
 
    void deserialize(Serializer::Properties& props);
};
 
}
}
 
#endif