MenuClass.cpp

/*
 * MenuClass.cpp
 *
 *  Created on: Jun 30, 2015
 *      Author: David
 */

#include "MenuClass.h"

MenuItem* MenuList::getItem(int aIndex) {
	// To make modulo work with negatives the way we want
	while (aIndex < 0) {
		aIndex += listSize;
	}
	return &(menuItems[aIndex % listSize]);
}

uint8_t MenuList::getSize() {
	return this->listSize;
}

MenuClass::MenuClass() {
	currentMenu = 0;
	currentItemIndex = 0;
	cancelFlag = false;
	runningFunction = false;
}

MenuClass::MenuClass(MenuList* aList) {
	currentMenu = aList;
	currentItemIndex = 0;
	cancelFlag = false;
	runningFunction = false;

}

boolean MenuClass::runFunction() {
	Item_Function theFunc;

#ifdef USING_PROGMEM
	theFunc =
			(Item_Function) pgm_read_word(&(currentMenu->getItem(currentItemIndex)->func));
#else
	theFunc = currentMenu->getItem(currentItemIndex)->func;

#endif
	return theFunc();

}

void MenuClass::doMenu() {
	cancelFlag = checkForCancel();
	if (runningFunction) {
		runningFunction = !runFunction();
	} else {
		//menuHandler();
		cancelFlag = false;
		int selUp = updateSelection();
		if (selUp) {
			currentItemIndex += selUp;
			//  Avoid negative numbers with the modulo
			//  to roll the menu over properly
			while (currentItemIndex < 0) {
				currentItemIndex += currentMenu->getSize();
			}
			currentItemIndex %= currentMenu->getSize();

		} else {   // only check for selection if menu not also updating
			if (selectionMade()) { // selection made, run item function once now
				if (!runFunction()) { // If item function returns false then it isn't done and we need to keep running it.
					runningFunction = true;
					return; // skip displaying the menu if we're going to run item function again.
				}
			}
		}
		displayMenu();
	}
}

void MenuClass::getText(char* aBuf, int aIndex) {
#ifdef USING_PROGMEM
	strcpy_P(aBuf, (currentMenu->getItem(aIndex)->text));
#else
	strcpy(aBuf, (currentMenu->getItem(aIndex)->text));
#endif
}

boolean MenuClass::checkForCancel() {
	return false;
}

void MenuClass::setCurrentMenu(MenuList* aMenu) {
	currentMenu = aMenu;
	currentItemIndex = 0;
}

boolean MenuClass::isCancelled() {
	return cancelFlag;
}