normal_title_bar.hpp

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// normal_title_bar.hpp
/*
  neogfx C++ App/Game Engine
  Copyright (c) 2020 Leigh Johnston.  All Rights Reserved.
  
  This program is free software: you can redistribute it and / or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program 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 General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
 
#include <neogfx/neogfx.hpp>
#include <neogfx/gui/widget/widget.hpp>
#include <neogfx/gui/window/i_window.hpp>
#include <neogfx/gui/layout/horizontal_layout.hpp>
#include <neogfx/gui/widget/image_widget.hpp>
#include <neogfx/gui/layout/spacer.hpp>
#include <neogfx/gui/widget/push_button.hpp>
#include <neogfx/gui/widget/i_title_bar.hpp>
 
namespace neogfx
{
    extern template class widget<i_title_bar>;
 
    class normal_title_bar : public widget<i_title_bar>
    {
        meta_object(widget<i_title_bar>)
    public:
        typedef i_title_bar abstract_type;
    private:
        template <typename WidgetType, widget_part_e WidgetPart>
        class non_client_item : public WidgetType
        {
        public:
            template <typename... Args>
            non_client_item(Args&&... aArgs) : 
                WidgetType{ std::forward<Args>(aArgs)... }
            {
            }
        public:
            widget_part part(const point&) const override
            {
                return widget_part{ this->root().as_widget(), WidgetPart};
            }
            bool ignore_non_client_mouse_events(bool aConsiderAncestors = true) const override
            {
                return false;
            };
        };
    private:
        enum texture_index_e
        {
            TextureMinimize,
            TextureMaximize,
            TextureRestore,
            TextureClose
        };
    public:
        normal_title_bar(i_standard_layout_container& aContainer, std::string const& aTitle = std::string{});
        normal_title_bar(i_standard_layout_container& aContainer, const i_texture& aIcon, std::string const& aTitle = std::string{});
        normal_title_bar(i_standard_layout_container& aContainer, const i_image& aIcon, std::string const& aTitle = std::string{});
    public:
        void set_icon(i_texture const& aIcon) override;
        i_string const& title() const override;
        void set_title(i_string const& aTitle) override;
    public:
        const image_widget& icon_widget() const override;
        image_widget& icon_widget() override;
        const text_widget& title_widget() const override;
        text_widget& title_widget() override;
    public:
        neogfx::size_policy size_policy() const override;
    public:
        neogfx::widget_type widget_type() const override;
        widget_part part(const point&) const override;
    public:
        color palette_color(color_role aColorRole) const override;
    private:
        void init();
        void update_textures();
    private:
        horizontal_layout iOuterLayout;
        horizontal_layout iInnerLayout;
        horizontal_layout iButtonLayout;
        non_client_item<image_widget, widget_part::SystemMenu> iIcon;
        non_client_item<text_widget, widget_part::TitleBar> iTitle;
        vertical_spacer iButtonSpacer;
        non_client_item<push_button, widget_part::MinimizeButton> iMinimizeButton;
        non_client_item<push_button, widget_part::MaximizeButton> iMaximizeButton;
        non_client_item<push_button, widget_part::MaximizeButton> iRestoreButton;
        non_client_item<push_button, widget_part::CloseButton> iCloseButton;
        sink iSink;
        mutable std::optional<std::pair<color, texture>> iTextures[4];
    };
 
    template <>
    inline widget_part normal_title_bar::non_client_item<image_widget, widget_part::SystemMenu>::part(const point&) const
    {
        if ((static_cast<const normal_title_bar&>(parent()).root().style() & window_style::SystemMenu) == window_style::SystemMenu)
            return widget_part{ root().as_widget(), widget_part::SystemMenu };
        return widget_part{ root().as_widget(), widget_part::TitleBar };
    }
}