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/*
* Menu.h
*
* Created on: 22 Jan 2018
* Author: David
*/
#ifndef SRC_DISPLAY_MENU_H_
#define SRC_DISPLAY_MENU_H_
#include "RepRapFirmware.h"
#if SUPPORT_12864_LCD
#include "MenuItem.h"
class MessageBox;
// Class to represent either a full page menu or a popup menu.
// For space reasons we store only a single instance of this class. Each nested menu is indented by a fixed margin from its parent.
class Menu
{
public:
Menu(Lcd& refLcd) noexcept;
~Menu();
void Load(const char* filename) noexcept; // load a menu file
void Pop() noexcept;
void EncoderAction(int action) noexcept;
void Refresh() noexcept;
void ClearHighlighting() noexcept;
void DisplayMessageBox(const MessageBox& mbox) noexcept;
void ClearMessageBox() noexcept;
private:
void LoadFixedMenu() noexcept;
void ResetCache() noexcept;
void Reload() noexcept;
void DrawAll() noexcept;
const char *ParseMenuLine(char * s) noexcept;
void LoadError(const char *msg, unsigned int line) noexcept;
void AddItem(MenuItem *item, bool isSelectable) noexcept;
const char *AppendString(const char *s) noexcept;
void EncoderActionEnterItemHelper() noexcept;
void EncoderActionScrollItemHelper(int action) noexcept;
void EncoderAction_ExecuteHelper(const char *const cmd) noexcept;
void AdvanceHighlightedItem(int n) noexcept;
MenuItem *FindNextSelectableItem(MenuItem *p) const noexcept;
MenuItem *FindPrevSelectableItem(MenuItem *p) const noexcept;
static const char *SkipWhitespace(const char *s) noexcept;
static char *SkipWhitespace(char *s) noexcept;
static bool CheckVisibility(MenuItem::Visibility vis) noexcept;
#ifdef __LPC17xx__
static const size_t CommandBufferSize = 1024;
#else
static const size_t CommandBufferSize = 2500;
#endif
static const size_t MaxMenuLineLength = 120; // adjusts behaviour in Reload()
static const size_t MaxMenuFilenameLength = 18;
static const size_t MaxMenuNesting = 8; // maximum number of nested menus
static const PixelNumber InnerMargin = 2; // how many pixels we keep clear inside the border
static const PixelNumber OuterMargin = 8 + InnerMargin; // how many pixels of the previous menu we leave on each side
Lcd& lcd;
uint32_t timeoutValue; // how long to time out after 0 = no timeout
uint32_t lastActionTime;
MenuItem *selectableItems; // selectable items at the innermost level
MenuItem *unSelectableItems; // unselectable items at the innermost level
MenuItem *highlightedItem; // which item is selected, or nullptr if nothing selected
String<MaxMenuFilenameLength> filenames[MaxMenuNesting];
size_t numNestedMenus;
bool itemIsSelected;
bool displayingFixedMenu;
bool displayingErrorMessage;
bool displayingMessageBox;
// Variables used while parsing
size_t commandBufferIndex;
unsigned int errorColumn; // column in the current line at which ParseMenuLine hit an error
MenuItem::FontNumber fontNumber;
PixelNumber currentMargin;
PixelNumber row, column;
PixelNumber rowOffset;
// Buffer for commands to be executed when the user presses a selected item
char commandBuffer[CommandBufferSize];
};
#endif
#endif /* SRC_DISPLAY_MENU_H_ */
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