popup_menu.hpp

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// popup_menu.hpp
/*
neogfx C++ App/Game Engine
Copyright (c) 2015, 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 "window.hpp"
#include <neogfx/gui/layout/vertical_layout.hpp>
#include <neogfx/gui/widget/i_menu.hpp>
 
namespace neogfx
{
    class popup_menu : public window
    {
        meta_object(window)
    public:
        static const window_style DEFAULT_STYLE = 
            window_style::Weak | 
            window_style::NoDecoration |
            window_style::NoActivate | 
            window_style::RequiresOwnerFocus | 
            window_style::HideOnOwnerClick | 
            window_style::InitiallyHidden | 
            window_style::InitiallyRenderable |
            window_style::DropShadow |
            window_style::Popup |
            window_style::Menu;
    public:
        struct no_menu : std::logic_error { no_menu() : std::logic_error("neogfx::popup_menu::no_menu") {} };
    public:
        popup_menu(const point& aPosition, i_menu& aMenu, window_style aStyle = DEFAULT_STYLE);
        popup_menu(i_widget& aParent, const point& aPosition, i_menu& aMenu, window_style aStyle = DEFAULT_STYLE);
        popup_menu(const point& aPosition, window_style aStyle = DEFAULT_STYLE);
        popup_menu(i_widget& aParent, const point& aPosition, window_style aStyle = DEFAULT_STYLE);
        ~popup_menu();
    public:
        bool has_menu() const;
        i_menu& menu() const;
        void set_menu(i_menu& aMenu, const point& aPosition = point{});
        void clear_menu();
    public:
        void resized() override;
    public:
        void dismiss() override;
    public:
        double rendering_priority() const override;
    public:
        neogfx::size_policy size_policy() const override;
        size minimum_size(optional_size const& aAvailableSpace = optional_size{}) const override;
        size maximum_size(optional_size const& aAvailableSpace = optional_size{}) const override;
    public:
        color frame_color() const override;
    public:
        bool key_pressed(scan_code_e aScanCode, key_code_e aKeyCode, key_modifiers_e aKeyModifiers) override;
        bool key_released(scan_code_e aScanCode, key_code_e aKeyCode, key_modifiers_e aKeyModifiers) override;
        bool text_input(i_string const& aText) override;
    private:
        void init();
        void close_sub_menu();
        void update_position();
    private:
        sink iSink;
        sink iSink2;
        i_widget* iParentWidget;
        i_menu* iMenu;
        std::unique_ptr<popup_menu> iOpenSubMenu;
        bool iOpeningSubMenu;
    };
}