tristate_button.hpp

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/*
    Copyright (C) 2003 - 2024
    by David White <dave@whitevine.net>
    Part of the Battle for Wesnoth Project https://www.wesnoth.org/
 
    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 2 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.
 
    See the COPYING file for more details.
*/
 
#pragma once
 
#include "widgets/widget.hpp"
 
#include "exceptions.hpp"
#include "editor/palette/common_palette.hpp"
#include "sdl/texture.hpp"
 
namespace gui {
 
//This button has 4 states, why it is called tristate?
class tristate_button : public widget
{
 
public:
 
    struct error : public game::error {
        error()
            : game::error("GUI1 tristate button error")
            {}
    };
 
    enum PRESSED_STATE { LEFT, RIGHT, BOTH, NONE };
 
    tristate_button(
            editor::tristate_palette* palette,
            std::string button_image="",
            const bool auto_join=true);
 
    /** Default implementation, but defined out-of-line for efficiency reasons. */
    virtual ~tristate_button();
 
    void set_pressed(PRESSED_STATE new_pressed_state);
 
    //  void set_active(bool active);
 
    bool pressed();
    PRESSED_STATE pressed_state() const;
 
    bool hit(int x, int y) const;
    virtual void enable(bool new_val=true) override;
    void release();
 
    void set_item_image(const texture& base, const texture& over = texture())
    {
        itemBaseImage_ = base;
        itemOverlayImage_ = over;
    }
 
    void set_item_id(const std::string& id) {
        item_id_ = id;
    }
 
protected:
 
    virtual void handle_event(const SDL_Event& event) override;
    virtual void mouse_motion(const SDL_MouseMotionEvent& event);
    virtual void mouse_down(const SDL_MouseButtonEvent& event);
    virtual void mouse_up(const SDL_MouseButtonEvent& event);
 
    virtual void draw_contents() override;
 
private:
 
    void calculate_size();
 
    texture baseImage_, touchedBaseImage_, activeBaseImage_,
        itemBaseImage_, itemOverlayImage_,
    //  normalImage_, activeImage_,
        pressedDownImage_, pressedUpImage_, pressedBothImage_,
        pressedBothActiveImage_, pressedDownActiveImage_, pressedUpActiveImage_,
        touchedDownImage_, touchedUpImage_, touchedBothImage_;
    //  disabledImage_, pressedDownDisabledImage_, pressedUpDisabledImage_, pressedBothDisabledImage_;
 
    SDL_Rect textRect_;
 
    enum STATE { UNINIT,
        NORMAL, ACTIVE,
        PRESSED_ACTIVE_LEFT, PRESSED_ACTIVE_RIGHT, PRESSED_ACTIVE_BOTH,
        TOUCHED_RIGHT, TOUCHED_BOTH_RIGHT, TOUCHED_BOTH_LEFT, TOUCHED_LEFT,
        PRESSED_LEFT, PRESSED_RIGHT, PRESSED_BOTH
    };
 
 
    STATE state_;
 
    bool pressed_;
 
    int base_height_, base_width_;
 
    editor::tristate_palette* palette_;
 
    std::string item_id_;
 
}; //end class button
 
}