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/*
* Copyright (C) 2004-2024 by the Widelands Development Team
*
* 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; 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 <https://www.gnu.org/licenses/>.
*
*/
#ifndef WL_UI_BASIC_RADIOBUTTON_H
#define WL_UI_BASIC_RADIOBUTTON_H
#include "base/vector.h"
#include "ui_basic/checkbox.h"
namespace UI {
class Panel;
struct Radiogroup;
struct Radiobutton : public Statebox {
friend struct Radiogroup;
Radiobutton(Panel* parent,
PanelStyle,
const std::string& name,
Vector2i,
const Image* pic,
Radiogroup&,
int32_t id);
~Radiobutton() override;
[[nodiscard]] Radiogroup& group() {
return group_;
}
[[nodiscard]] Radiobutton* next_button() {
return nextbtn_;
}
private:
void button_clicked() override;
Radiobutton* nextbtn_;
Radiogroup& group_;
int32_t id_;
};
/**
* A group of radiobuttons. At most one of them is checked at any time. State
* is -1 if none is checked, otherwise it's the index of the checked button.
*/
struct Radiogroup {
friend struct Radiobutton;
Radiogroup();
~Radiogroup();
Notifications::Signal<> changed;
Notifications::Signal<int32_t> changedto;
Notifications::Signal<> clicked; // clicked without things changed
/**
* Text conventions: Sentence case for the 'tooltip'
*/
int32_t add_button(Panel* parent,
PanelStyle,
const std::string& name,
Vector2i,
const Image* pic,
const std::string& tooltip = "",
Radiobutton** = nullptr);
[[nodiscard]] int32_t get_state() const {
return state_;
}
void set_state(int32_t state, bool send_signal);
void set_enabled(bool);
[[nodiscard]] Radiobutton* get_first_button() {
return buttons_;
}
// Signifies that the radio group is dynamically allocated and its lifetime is nowhere managed,
// so the radiogroup will be freed when its last radiobutton is deleted.
// If the group is empty, this will delete it instantly.
void manage_own_lifetime();
private:
Radiobutton* buttons_; // linked list of buttons (not sorted)
int32_t highestid_;
int32_t state_; // -1: none
bool managing_own_lifetime_{false};
};
} // namespace UI
#endif // end of include guard: WL_UI_BASIC_RADIOBUTTON_H
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