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1 files changed, 135 insertions, 0 deletions
| -rw-r--r-- | Year 1/Object-oriented Programming/Project 1/src/Generic/ConsoleInterface/Menu.cpp | 135 |
diff --git a/Year 1/Object-oriented Programming/Project 1/src/Generic/ConsoleInterface/Menu.cpp b/Year 1/Object-oriented Programming/Project 1/src/Generic/ConsoleInterface/Menu.cpp new file mode 100644 index 0000000..3ab857e --- /dev/null +++ b/Year 1/Object-oriented Programming/Project 1/src/Generic/ConsoleInterface/Menu.cpp @@ -0,0 +1,135 @@ +#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(); + } +} |