| LiquidMenu 1.2.0 Menu creation Arduino library for LCDs, wraps LiquidCrystal.

F_focus_menu.ino

This example demonstrates how to customize the focus indicator.

/*
* LiquidMenu library - focus_menu.ino
*
* This example demonstrates how to customize the focus indicator.
*
* The default focus indicator is an arrow symbol shown on the right of the
* focused line. The focus indicator position can be changed per line to be
* shown on the right, on the left or in a specified position. The focus
* symbol can also be changed, per position.
* In this example a custom focus symbol is defined (uint8_t rFocus[8]). Then
* it is configured to be the right focus indicator symbol using the
* bool LiquidMenu::set_focusSymbol(Position position, uint8_t symbol[8]) method.
* The focus position for the different lines is configured using the
* bool set_focusPosition(Position position, uint8_t column = 0, uint8_t row = 0)
* method. If the "position" is "Position::CUSTOM", the column and row parameters
* must be specified. The focus position can be specified for a single line, for
* the whole screen, for the whole menu or for the whole menu system using the
* respective objects.
*
* The circuit:
* https://github.com/VasilKalchev/LiquidMenu/blob/master/examples/focus_menu/focus_menu.png
* - LCD RS pin to Arduino pin 12
* - LCD E pin to Arduino pin 11
* - LCD D4 pin to Arduino pin 5
* - LCD D5 pin to Arduino pin 4
* - LCD D6 pin to Arduino pin 3
* - LCD D7 pin to Arduino pin 2
* - LCD R/W pin to ground
* - LCD VSS pin to ground
* - LCD VCC pin to 5V
* - 10k ohm potentiometer: ends to 5V and ground, wiper to LCD V0
* - 150 ohm resistor from 5V to LCD Anode
* - LCD Cathode to ground
* - ----
* - Button (left) to Arduino pin A0 and ground
* - Button (right) to Arduino pin 7 and ground
* - Button (enter) to Arduino pin 10 and ground
*
* Created July 24, 2016
* by Vasil Kalchev
*
* https://github.com/VasilKalchev/LiquidMenu
* http://omerk.github.io/lcdchargen/ - for creating custom indicator symbol
*
*/
#include <LiquidCrystal.h>
#include <LiquidMenu.h>
#include "Button.h"
// Pin mapping for the display
const byte LCD_RS = 12;
const byte LCD_E = 11;
const byte LCD_D4 = 5;
const byte LCD_D5 = 4;
const byte LCD_D6 = 3;
const byte LCD_D7 = 2;
//LCD R/W pin to ground
//10K potentiometer to VO
LiquidCrystal lcd(LCD_RS, LCD_E, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
// Button objects instantiation
const bool pullup = true;
Button left(A0, pullup);
Button right(7, pullup);
Button enter(10, pullup);
LiquidLine welcome_line1(1, 0, "LiquidMenu ", LIQUIDMENU_VERSION);
LiquidLine welcome_line2(1, 1, "Focus example");
LiquidScreen welcome_screen(welcome_line1, welcome_line2);
LiquidLine leftFocus_line(1, 0, "Left focus");
LiquidLine rightFocus_line(1, 1, "Right focus");
LiquidScreen leftright_screen(leftFocus_line, rightFocus_line);
LiquidLine customFocus_line(1, 0, "Custom focus");
LiquidScreen customFocus_screen(customFocus_line);
LiquidLine leftF1_line(6, 0, "Left");
LiquidLine leftF2_line(6, 1, "focus");
LiquidScreen leftF12_screen(leftF1_line, leftF2_line);
LiquidMenu menu(lcd);
// Checks all the buttons.
void buttonsCheck() {
if (right.check() == LOW) {
menu.next_screen();
}
if (left.check() == LOW) {
menu.previous_screen();
}
if (enter.check() == LOW) {
// Switches focus to the next line.
menu.switch_focus();
}
}
// Indicator symbol definition, it will change the default symbol for the right focus.
// http://omerk.github.io/lcdchargen/
uint8_t rFocus[8] = {
0b00000,
0b00000,
0b00100,
0b01110,
0b00100,
0b00000,
0b00000,
0b00000
};
// Blank function, it is attached to the lines so that they become focusable.
void func() {
return;
}
void setup() {
Serial.begin(250000);
lcd.begin(16, 2);
// Changes the right focus symbol.
menu.set_focusSymbol(Position::RIGHT, rFocus);
// Sets the focus position for this line to be on the left.
leftFocus_line.set_focusPosition(Position::LEFT);
rightFocus_line.set_focusPosition(Position::RIGHT);
// 'CUSTOM' focus position needs column and row parameters.
customFocus_line.set_focusPosition(Position::CUSTOM, 15, 0);
// The focus position can be changed for the whole screen or
// menu at once. 'CUSTOM' position cannot be set because it
// needs individual coordinates.
leftF12_screen.set_focusPosition(Position::LEFT);
// Attaching a function to a line makes the line focusable.
leftFocus_line.attach_function(1, func);
rightFocus_line.attach_function(1, func);
customFocus_line.attach_function(1, func);
leftF1_line.attach_function(1, func);
leftF2_line.attach_function(1, func);
menu.add_screen(welcome_screen);
menu.add_screen(leftright_screen);
menu.add_screen(customFocus_screen);
menu.add_screen(leftright_screen);
menu.add_screen(leftF12_screen);
menu.update();
}
void loop() {
buttonsCheck();
}