PanelStyle.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_PanelStyle_h
#define Pt_Forms_PanelStyle_h
 
#include <Pt/Forms/Style.h>
 
namespace Pt {
 
namespace Forms {
 
class PT_FORMS_API PanelStyleOptions
{
    public:
        PanelStyleOptions();
 
        bool hasOverrides() const;
 
        std::size_t generation() const;
 
        const Gfx::Brush* background() const;
 
        void setBackground(const Gfx::Brush& brush);
 
        const Gfx::Pen* contour() const;
 
        void setContour(const Gfx::Pen& pen);
 
        const Gfx::Color* textColor() const;
 
        void setTextColor(const Gfx::Color& color);
 
        const Gfx::Font* font() const;
 
        void setFont(const Gfx::Font& font);
 
        void setFontSize(std::size_t size);
 
        void setFontWeight(Gfx::Font::Weight weight);
 
        void setFontSlant(Gfx::Font::Slant slant);
 
        Gfx::Font getFont(const Gfx::Font& base) const;
 
    private:
        enum StyleOverride
        {
            Background = 0x01,
            Contour    = 0x02,
            TextColor  = 0x04,
            Font       = 0x08
        };
 
        bool hasOverride(StyleOverride mask) const;
 
        void setOverride(StyleOverride mask);
 
    private:
        AutoPtr<Gfx::Brush> _background;
        AutoPtr<Gfx::Pen>   _contour;
        AutoPtr<Gfx::Color> _textColor;
        FontOption          _font;
        std::size_t         _generation;
        unsigned            _overrides;
};
 
class PT_FORMS_API PanelState
{
    public:
        PanelState();
 
        bool isEnabled() const;
 
        void setEnabled(bool value);
 
        bool isFocused() const;
 
        void setFocused(bool value);
 
    private:
        bool _enabled;
        bool _focused;
};
 
class PT_FORMS_API PanelRenderer : public Style::Facet
{
    public:
        explicit PanelRenderer(std::size_t refs = 0);
 
        virtual ~PanelRenderer();
 
        PanelRenderer* create() const;
 
        void prepare(const StyleOptions& options,
                     const PanelStyleOptions& panelOptions);
 
    public:
        Gfx::SizeF measureFrame(PaintSurface& surface,
                                const Gfx::SizeF& contentSize);
 
        Gfx::RectF layoutFrame(PaintSurface& surface,
                               const Gfx::RectF& frameRect);
 
        const Painter& textPainter(PaintSurface& surface);
 
        void renderBackground(PaintContext& context,
                              const Gfx::RectF& rect,
                              const PanelState& state);
 
        void renderFrame(PaintContext& context,
                         const Gfx::RectF& rect,
                         const PanelState& state);
 
        void renderText(PaintContext& context,
                        const Gfx::RectF& rect,
                        const String& text,
                        const Gfx::PointF& pos,
                        const PanelState& state);
 
        void renderIcon(PaintContext& context,
                        const Gfx::RectF& rect,
                        const Pixmap& picture,
                        const Gfx::PointF& pos,
                        const PanelState& state);
 
    protected:
        virtual void onReset(const StyleOptions& options);
 
        virtual PanelRenderer* onCreate() const = 0;
 
        virtual void onPrepare(const StyleOptions& options,
                               const PanelStyleOptions& panelOptions) = 0;
 
        virtual Gfx::SizeF onMeasureFrame(PaintSurface& surface,
                                          const Gfx::SizeF& contentSize) = 0;
 
        virtual Gfx::RectF onLayoutFrame(PaintSurface& surface,
                                         const Gfx::RectF& frameRect) = 0;
 
        virtual const Painter& onGetTextPainter(PaintSurface& surface) = 0;
 
        virtual void onRenderBackground(PaintContext& context,
                                        const Gfx::RectF& rect,
                                        const PanelState& state) = 0;
 
        virtual void onRenderFrame(PaintContext& context,
                                   const Gfx::RectF& rect,
                                   const PanelState& state) = 0;
 
        virtual void onRenderText(PaintContext& context,
                                  const Gfx::RectF& rect,
                                  const String& text,
                                  const Gfx::PointF& pos,
                                  const PanelState& state) = 0;
 
        virtual void onRenderIcon(PaintContext& context,
                                  const Gfx::RectF& rect,
                                  const Pixmap& picture,
                                  const Gfx::PointF& pos,
                                  const PanelState& state) = 0;
};
 
class PT_FORMS_API PanelStyle : public StyleBinder<PanelRenderer, 
                                                   PanelStyleOptions>
{
    public:
        PanelStyle();
};
 
} // namespace
 
} // namespace
 
#endif