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#include "Menu.h"
#include "Toolbox.hpp"
#include <cstring>
Menu::Menu() : Menu("Menu", false, false) {}
/*! \param title C-style string, class stores at most 255 characters (last character is always terminating zero)
* \param backExistsApp Flag whether or not to list the 0-th option as "Exit", rather than "Go Back"
* \param isSubMenu Flag whether or not to show the title as a subTitle or not
*/
Menu::Menu(const char* title, bool backExistsApp, bool isSubMenu) : menuOptions() {
this->backExistsApp = backExistsApp;
this->isSubMenu = isSubMenu;
strncpy(this->title, title, 255);
this->title[255] = '\0';
}
/*! \param title C-style string, class stores at most 255 characters (last character is always terminating zero)
* \param backExistsApp Flag whether or not to list the 0-th option as "Exit", rather than "Go Back"
* \param isSubMenu Flag whether or not to show the title as a subTitle or not
* \param commands Pointer to an array of Command instances
* \param commandCount Number of elements that "commands" points to
*/
Menu::Menu(const char* title, bool backExistsApp, bool isSubMenu, const Command* commands, unsigned commandCount) {
this->backExistsApp = backExistsApp;
this->isSubMenu = isSubMenu;
menuOptions = List<Command>(commands, commandCount);
strncpy(this->title, title, 255);
this->title[255] = '\0';
}
void Menu::addCommand(const Command& command) {
menuOptions.add(command);
}
enum MessageType {
NoPrint,
Success,
Warning,
Error,
};
const char* msg;
MessageType msgType;
/*! \param message C-style string, saves to pointer for later reuse when showing the message.
*
* Stores the message pointer in a global variable (in the cpp file) and
* sets it's type as an Error in another global variable (in the cpp file).
*
* The next time the whole Menu is shown, the message will appear below the title.
*/
void Menu::registerError(const char* message) const {
msg = message;
msgType = Error;
}
/*! \param message C-style string, saves to pointer for later reuse when showing the message.
*
* Stores the message pointer in a global variable (in the cpp file) and
* sets it's type as a Warning in another global variable (in the cpp file).
*
* The next time the whole Menu is shown, the message will appear below the title.
*/
void Menu::registerWarning(const char* message) const {
msg = message;
msgType = Warning;
}
/*! \param message C-style string, saves to pointer for later reuse when showing the message.
*
* Stores the message pointer in a global variable (in the cpp file) and
* sets it's type as Success in another global variable (in the cpp file).
*
* The next time the whole Menu is shown, the message will appear below the title.
*/
void Menu::registerSuccess(const char* message) const {
msg = message;
msgType = Success;
}
/*!
* Prints the title, then an Error/Warning/Sucess message (if set),
* prints all command names as an ordered list (starting from 1),
* waits for user input to select one of those commands (by list number)
* and finally executes the appropriate command's run() function.
*
* After the run() function exists, everything is reprinted.
* The 0 list index is always "Go Back"/"Exit" and it always stops the reprinting loop.
*
* If there are no commands, prints "Menu is empty!".
* If user input doesn't correspond to any command, registers an error message and reprints.
*/
void Menu::navigate() const {
if (menuOptions.get_count() == 0) {
printLine("Menu is empty!");
return;
}
unsigned buffer = 1; // We immedeately read the value of buffer, so this is fine
while (buffer != 0) {
clear();
if (isSubMenu)
subTitleBox(title);
else
titleBox(title);
switch(msgType) {
case Error: errorBox(msg); msgType = NoPrint; break;
case Warning: warningBox(msg); msgType = NoPrint; break;
case Success: successBox(msg); msgType = NoPrint; break;
case NoPrint: printLine(""); break;
}
printLine("");
resetOrderedList(0);
if (backExistsApp)
printOrderedListElem("Exit");
else
printOrderedListElem("Go Back");
for (unsigned i = 0; i < menuOptions.get_count(); i++)
printOrderedListElem(menuOptions[i].get_nameInMenu());
_printInputBoxLabel("Execute No [0-");
print(menuOptions.get_count());
print("]: ");
read(buffer);
if (buffer > menuOptions.get_count())
registerError("Invalid menu option!");
else if (buffer > 0)
menuOptions[buffer - 1].run();
}
}
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