/* -*- C++ -*- */

/********************

May 2017 Rui Azevedo - ruihfazevedo(@rrob@)gmail.com

www.r-site.net

implementing a cancelable field

this field restores the original value on escape

use it as:

altFIELD(cancelField,...);

the remaining parameters are the same as the regular FIELD

***/

#ifndef RSITE_ARDUINO_MENU_CANCEL_FIELD

#define RSITE_ARDUINO_MENU_CANCEL_FIELD

#include "../menuDefs.h"

using namespace Menu;

class cancelFieldOptions {

public:

static bool quitOnEsc;

static bool accelSendEsc;

};

//custom field edit

template<typename T>

class cancelField:public menuField<T> {

public:

T original;//to use when canceling

bool editing;

cancelField(constMEM menuFieldShadow<T>& shadow):menuField<T>(shadow),editing(false) {}

void doNav(navNode& nav,navCmd cmd) override {

if (!editing) {

original=menuField<T>::target();

editing=true;

}

switch(cmd.cmd) {

case selCmd:

case idxCmd:

//MENU_DEBUG_OUT<<"IDX"<<endl;

menuField<T>::tunning=true;//prepare for exit

return doNav(nav,cancelFieldOptions::accelSendEsc?escCmd:enterCmd);

case escCmd:

editing=!cancelFieldOptions::quitOnEsc;

//menuField<T>::tunning=false;

//MENU_DEBUG_OUT<<"ESC"<<endl;

menuField<T>::target()=original;

break;

case enterCmd:

//MENU_DEBUG_OUT<<"ENTER"<<endl;

if (menuField<T>::tunning||nav.root->nav2D||!menuField<T>::tune())

editing=false;

break;

default: break;

}

menuField<T>::doNav(nav,cmd);

}

};

#endif