StyleOptions.h

/* Copyright (C) 2016 Laurentiu-Gheorghe Crisan
   Copyright (C) 2016 Marc Boris Duerner
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 
 As a special exception, you may use this file as part of a free
 software library without restriction. Specifically, if other files
 instantiate templates or use macros or inline functions from this
 file, or you compile this file and link it with other files to
 produce an executable, this file does not by itself cause the
 resulting executable to be covered by the GNU General Public
 License. This exception does not however invalidate any other
 reasons why the executable file might be covered by the GNU Library
 General Public License.
 
 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
 MA 02110-1301 USA
*/
 
#ifndef Pt_Forms_StyleOptions_h
#define Pt_Forms_StyleOptions_h
 
#include <Pt/Forms/Api.h>
#include <Pt/Gfx/Pen.h>
#include <Pt/Gfx/Brush.h>
#include <Pt/Gfx/Font.h>
#include <Pt/Gfx/Color.h>
#include <Pt/Any.h>
#include <Pt/NonCopyable.h>
#include <Pt/SmartPtr.h>
 
#include <cstddef>
#include <string>
#include <typeinfo>
#include <vector>
 
namespace Pt {
 
namespace Forms {
 
class PT_FORMS_API StyleOption
{
    public:
        virtual ~StyleOption()
        {};
 
        const char* name() const
        {
            return _name.c_str();
        }
 
        virtual const std::type_info& typeInfo() const = 0;
 
        virtual const Pt::Any& get() const = 0;
 
        virtual void set(const Pt::Any& v) = 0;
 
    protected:
        explicit StyleOption(const char* name)
        : _name(name)
        {}
 
    private:
        std::string _name;
};
 
 
template<typename T>
class BasicStyleOption : public StyleOption
{
    public:
        BasicStyleOption(const char* name, const T& value)
        : StyleOption(name)
        , _value(value)
        {}
 
        const T& value() const
        {
            return any_cast<const T&>(_value);
        }
 
        void setValue(const T& v)
        {
            _value = Pt::Any(v);
        }
 
        BasicStyleOption& operator=(const BasicStyleOption& o)
        {
            _value = o._value;
            return *this;
        }
 
        virtual const std::type_info& typeInfo() const
        {
            return typeid(T);
        }
 
        virtual const Pt::Any& get() const
        {
            return _value;
        }
 
        virtual void set(const Pt::Any& v)
        {
            setValue(any_cast<T>(v));
        }
 
    private:
        Pt::Any _value;
};
 
 
class PT_FORMS_API StyleOptions
{
    public:
        class Iterator
        {
            public:
                explicit Iterator(StyleOption* const* p)
                : _ptr(p)
                {}
 
                const StyleOption& operator*() const
                { return **_ptr; }
 
                const StyleOption* operator->() const
                { return *_ptr; }
 
                Iterator& operator++()
                {
                    ++_ptr;
                    return *this;
                }
 
                bool operator!=(const Iterator& o) const
                { return _ptr != o._ptr; }
 
                bool operator==(const Iterator& o) const
                { return _ptr == o._ptr; }
 
            private:
                StyleOption* const* _ptr;
        };
 
    public:
        explicit StyleOptions();
 
        StyleOptions(const StyleOptions& o);
 
        virtual ~StyleOptions();
 
        StyleOptions& operator=(const StyleOptions& o);
 
        std::size_t generation() const;
 
        const Gfx::Brush& background() const;
 
        void setBackground(const Gfx::Brush& b);
 
        const Gfx::Brush& foreground() const;
 
        void setForeground(const Gfx::Brush& c);
 
        const Gfx::Pen& contour() const;
 
        void setContour(const Gfx::Pen& p);
 
        const Gfx::Color& accentColor() const;
 
        void setAccentColor(const Gfx::Color& color);
 
        const Gfx::Brush& viewBackground() const;
 
        void setViewBackground(const Gfx::Brush& b);
 
        const Gfx::Color& highlightColor() const;
 
        void setHighlightColor(const Gfx::Color& c);
 
        const Gfx::Brush& hoverBackground() const;
 
        void setHoverBackground(const Gfx::Brush& b);
 
        const Gfx::Brush& textBackground() const;
 
        void setTextBackground(const Gfx::Brush& b);
 
        const Gfx::Color& textColor() const;
 
        void setTextColor(const Gfx::Color& c);
 
        const Gfx::Color& placeholderTextColor() const;
 
        void setPlaceholderTextColor(const Gfx::Color& c);
 
        const Gfx::Color& highlightedTextColor() const;
 
        void setHighlightedTextColor(const Gfx::Color& c);
 
        const Gfx::Brush& alternateViewBackground() const;
 
        void setAlternateViewBackground(const Gfx::Brush& b);
 
        const Gfx::Brush& popupBackground() const;
 
        void setPopupBackground(const Gfx::Brush& b);
 
        const Gfx::Color& popupTextColor() const;
 
        void setPopupTextColor(const Gfx::Color& c);
 
        const Gfx::Font& font() const;
 
        void setFont(const Gfx::Font& f);
 
        Iterator begin() const;
 
        Iterator end() const;
 
        const StyleOption* find(const char* name) const;
 
        void set(const char* name, const Pt::Any& value);
 
    protected:
        void registerOption(StyleOption* opt);
 
    private:
        void init();
 
    private:
        std::size_t                      _generation;
        std::vector<StyleOption*>        _options;
 
        BasicStyleOption<Gfx::Brush>     _background;
        BasicStyleOption<Gfx::Brush>     _foreground;
        BasicStyleOption<Gfx::Pen>       _contour;
        BasicStyleOption<Gfx::Color>     _accentColor;
        BasicStyleOption<Gfx::Brush>     _viewBackground;
        BasicStyleOption<Gfx::Color>     _highlightColor;
        BasicStyleOption<Gfx::Brush>     _hoverBackground;
        BasicStyleOption<Gfx::Brush>     _textBackground;
        BasicStyleOption<Gfx::Color>     _textColor;
        BasicStyleOption<Gfx::Color>     _placeholderTextColor;
        BasicStyleOption<Gfx::Color>     _highlightedTextColor;
        BasicStyleOption<Gfx::Brush>     _alternateViewBackground;
        BasicStyleOption<Gfx::Brush>     _popupBackground;
        BasicStyleOption<Gfx::Color>     _popupTextColor;
        BasicStyleOption<Gfx::Font>      _font;
};
 
class PT_FORMS_API FontOption
{
    public:
        FontOption();
 
        bool hasOverride() const;
 
        const Gfx::Font* font() const;
 
        void setFont(const Gfx::Font& font);
 
        void setSize(std::size_t size);
 
        void setWeight(Gfx::Font::Weight weight);
 
        void setSlant(Gfx::Font::Slant slant);
 
        Gfx::Font getFont(const Gfx::Font& base) const;
 
    private:
        enum Override
        {
            All    = 0x1,
            Size   = 0x2,
            Weight = 0x4,
            Slant  = 0x8
        };
 
    private:
        AutoPtr<Gfx::Font> _font;
        unsigned           _overrides;
};
 
} // namespace
 
} // namespace
 
#endif