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/* Dialog.h
Copyright (c) 2014-2020 by Michael Zahniser
Endless Sky 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.
Endless Sky 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/>.
*/
#pragma once
#include "Panel.h"
#include "Point.h"
#include "text/Truncate.h"
#include <functional>
#include <string>
class DataNode;
class PlayerInfo;
class System;
class TextArea;
// A dialog box displays a given message to the player. The box will expand to
// fit the message, and may also include a text input field. The box may have
// only an "ok" button, or may also have a "cancel" button. If this dialog is
// introducing a mission, the buttons are instead "accept" and "decline". A
// callback function can be given to receive the player's response.
class Dialog : public Panel {
public:
// An OK / Cancel dialog where Cancel can be disabled. The okIsActive lets
// you select whether "OK" (true) or "Cancel" (false) are selected as the default option.
Dialog(std::function<void()> okFunction, const std::string &message, Truncate truncate,
bool canCancel, bool okIsActive);
// Dialog that has no callback (information only). In this form, there is
// only an "ok" button, not a "cancel" button.
explicit Dialog(const std::string &text, Truncate truncate = Truncate::NONE, bool allowsFastForward = false);
// Mission accept / decline dialog.
Dialog(const std::string &text, PlayerInfo &player, const System *system = nullptr,
Truncate truncate = Truncate::NONE, bool allowsFastForward = false);
virtual ~Dialog() override;
// Three different kinds of dialogs can be constructed: requesting numerical
// input, requesting text input, or not requesting any input at all. In any
// case, the callback is called only if the user selects "ok", not "cancel."
template<class T>
Dialog(T *t, void (T::*fun)(int), const std::string &text,
Truncate truncate = Truncate::NONE, bool allowsFastForward = false);
template<class T>
Dialog(T *t, void (T::*fun)(int), const std::string &text, int initialValue,
Truncate truncate = Truncate::NONE, bool allowsFastForward = false);
template<class T>
Dialog(T *t, void (T::*fun)(const std::string &), const std::string &text, std::string initialValue = "",
Truncate truncate = Truncate::NONE, bool allowsFastForward = false);
// This callback requests text input but with validation. The "ok" button is disabled
// if the validation callback returns false.
template<class T>
Dialog(T *t, void (T::*fun)(const std::string &), const std::string &text,
std::function<bool(const std::string &)> validate,
std::string initialValue = "",
Truncate truncate = Truncate::NONE,
bool allowsFastForward = false);
template<class T>
Dialog(T *t, void (T::*fun)(), const std::string &text,
Truncate truncate = Truncate::NONE, bool allowsFastForward = false);
// Callback is always called with value user input to dialog (ok == true, cancel == false).
template<class T>
Dialog(T *t, void (T::*fun)(bool), const std::string &text,
Truncate truncate = Truncate::NONE, bool allowsFastForward = false);
// Draw this panel.
virtual void Draw() override;
// Static method used to convert a DataNode into formatted Dialog text.
static void ParseTextNode(const DataNode &node, size_t startingIndex, std::string &text);
// Some dialogs allow fast-forward to stay active.
bool AllowsFastForward() const noexcept final;
protected:
// The user can click "ok" or "cancel", or use the tab key to toggle which
// button is highlighted and the enter key to select it.
virtual bool KeyDown(SDL_Keycode key, Uint16 mod, const Command &command, bool isNewPress) override;
virtual bool Click(int x, int y, MouseButton button, int clicks) override;
virtual void Resize() override;
private:
// Common code from all three constructors:
void Init(const std::string &message, Truncate truncate, bool canCancel = true, bool isMission = false);
void DoCallback(bool isOk = true) const;
// The width of the dialog, excluding margins.
int Width() const;
protected:
std::shared_ptr<TextArea> text;
// The number of extra segments in this dialog.
int extensionCount;
std::function<void(int)> intFun;
std::function<void(const std::string &)> stringFun;
std::function<void()> voidFun;
std::function<void(bool)> boolFun;
std::function<bool(const std::string &)> validateFun;
bool canCancel;
bool okIsActive;
bool isMission;
bool isOkDisabled = false;
bool allowsFastForward = false;
bool isWide = false;
std::string input;
Point okPos;
Point cancelPos;
const System *system = nullptr;
PlayerInfo *player = nullptr;
};
template<class T>
Dialog::Dialog(T *t, void (T::*fun)(int), const std::string &text, Truncate truncate, bool allowsFastForward)
: intFun(std::bind(fun, t, std::placeholders::_1)), allowsFastForward(allowsFastForward)
{
Init(text, truncate);
}
template<class T>
Dialog::Dialog(T *t, void (T::*fun)(int), const std::string &text,
int initialValue, Truncate truncate, bool allowsFastForward)
: intFun(std::bind(fun, t, std::placeholders::_1)),
allowsFastForward(allowsFastForward),
input(std::to_string(initialValue))
{
Init(text, truncate);
}
template<class T>
Dialog::Dialog(T *t, void (T::*fun)(const std::string &), const std::string &text,
std::string initialValue, Truncate truncate, bool allowsFastForward)
: stringFun(std::bind(fun, t, std::placeholders::_1)),
allowsFastForward(allowsFastForward),
input(initialValue)
{
Init(text, truncate);
}
template<class T>
Dialog::Dialog(T *t, void (T::*fun)(const std::string &), const std::string &text,
std::function<bool(const std::string &)> validate, std::string initialValue, Truncate truncate, bool allowsFastForward)
: stringFun(std::bind(fun, t, std::placeholders::_1)),
validateFun(std::move(validate)),
isOkDisabled(true),
allowsFastForward(allowsFastForward),
input(initialValue)
{
Init(text, truncate);
}
template<class T>
Dialog::Dialog(T *t, void (T::*fun)(), const std::string &text, Truncate truncate, bool allowsFastForward)
: voidFun(std::bind(fun, t)), allowsFastForward(allowsFastForward)
{
Init(text, truncate);
}
template<class T>
Dialog::Dialog(T *t, void (T::*fun)(bool), const std::string &text, Truncate truncate, bool allowsFastForward)
: boolFun(std::bind(fun, t, std::placeholders::_1)), allowsFastForward(allowsFastForward)
{
Init(text, truncate);
}
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