From 3b8b10252d751191eedb2f630f64b6be135f9a5a Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Wed, 11 Oct 2023 14:35:04 +0200
Subject: FIXME

---
 main.ino | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 54 insertions(+), 3 deletions(-)

diff --git a/main.ino b/main.ino
index 8067cb4..6a1538a 100644
--- a/main.ino
+++ b/main.ino
@@ -38,13 +38,31 @@ EasyButton button_select(BUTTON_PIN_SELECT);
 
 #include <GxEPD2_BW.h>
 #include <Fonts/FreeMonoBold9pt7b.h>
-#include <U8g2_for_Adafruit_GFX.h>
 
 // source: https://github.com/ZinggJM/GxEPD2/blob/master/examples/GxEPD2_Example/GxEPD2_display_selection.h#L192
 GxEPD2_BW<GxEPD2_290, GxEPD2_290::HEIGHT> displayEPaper(GxEPD2_290(EPD_CS, EPD_DC, EPD_RSET, EPD_BUSY));
 
-U8G2_FOR_ADAFRUIT_GFX u8g2;
+#include <GEM_adafruit_gfx.h>
 
+// Create variables that will be editable through the menu and assign them initial values
+int number = -512;
+boolean enablePrint = false;
+
+// Create two menu item objects of class GEMItem, linked to number and enablePrint variables 
+GEMItem menuItemInt("Number:", number);
+GEMItem menuItemBool("Enable print:", enablePrint);
+
+// Create menu button that will trigger printData() function. It will print value of our number variable
+// to Serial monitor if enablePrint is true. We will write (define) this function later. However, we should
+// forward-declare it in order to pass to GEMItem constructor
+void printData(); // Forward declaration
+GEMItem menuItemButton("Print", printData);
+
+// Create menu page object of class GEMPage. Menu page holds menu items (GEMItem) and represents menu level.
+// Menu can have multiple menu pages (linked to each other) with multiple menu items each
+GEMPage menuPageMain("Main Menu");
+
+GEM_adafruit_gfx menu(displayEPaper, GEM_POINTER_ROW, GEM_ITEMS_COUNT_AUTO);
 #endif
 
 void setup() {
@@ -64,7 +82,19 @@ void setup() {
   led.breathe(2000);
 
   displayEPaper.init(115200, true, 2, false);
-  u8g2.begin(displayEPaper);
+  displayEPaper.setTextColor(GxEPD_BLACK);
+  displayEPaper.firstPage();
+  do
+  {
+    displayEPaper.fillScreen(GxEPD_WHITE);
+    // comment out next line to have no or minimal Adafruit_GFX code
+    displayEPaper.print("Hello World!");
+  }
+  while (displayEPaper.nextPage());
+
+  menu.init();
+  setupMenu();
+  menu.drawMenu();
 }
 
 void loop() {
@@ -96,3 +126,24 @@ void onButtonSelectPressed() {
     Serial.println("button SELECT clicked");
     led.on();
 }
+
+void setupMenu() {
+  // Add menu items to menu page
+  menuPageMain.addMenuItem(menuItemInt);
+  menuPageMain.addMenuItem(menuItemBool);
+  menuPageMain.addMenuItem(menuItemButton);
+
+  // Add menu page to menu and set it as current
+  menu.setMenuPageCurrent(menuPageMain);
+}
+
+void printData() {
+  // If enablePrint flag is set to true (checkbox on screen is checked)...
+  if (enablePrint) {
+    // ...print the number to Serial
+    Serial.print("Number is: ");
+    Serial.println(number);
+  } else {
+    Serial.println("Printing is disabled, sorry:(");
+  }
+}
-- 
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