Merge pull request #238 from ferchinas/master

Create decimalslField.ino

Author: neu-rah

examples/plugins/decimalslField/decimalslField.ino

@@ -0,0 +1,118 @@
+/* -*- C++ -*- */
+/********************
+May 2017 Rui Azevedo - ruihfazevedo(@rrob@)gmail.com
+www.r-site.net
+unlike native objects, pluggins can be device specific, so some pluggins might
+not work on all devices.
+all sorts of plugins may be available in the future and if you customize
+a component and think it of interest of others please do pull request.
+contrubutions and contrubutors are welcome.
+
+decimalslField - To select the number of decimal places that are printed in float and double variables types. Feb 2019 ferchinas
+                 Tested on ESP32, Oled i2c display, u8g2 driver. It could work on other devices.
+***/
+
+#include <menu.h>
+#include <menuIO/serialOut.h>
+#include <menuIO/chainStream.h>
+#include <menuIO/serialIn.h>
+
+using namespace Menu;
+
+#define MAX_DEPTH 1
+
+unsigned char cantDecimals = 1;
+float         floatVar     = 0.123456789123456789;
+double        doubletVar   = 0.123456789123456789;
+
+void updateEvent_cb(eventMask e);    
+
+//-----Custom floatField----------------
+#define DECIMALSFLIED_DEFAULT 1
+
+template<typename T>
+class decimalslField :public menuField<T> {                //https://github.com/neu-rah/ArduinoMenu/blob/master/examples/customField/customField/customField.ino
+private:
+  idx_t decimals;
+public:
+  decimalslField(constMEM menuFieldShadow<T>& shadow) :menuField<T>(shadow) { decimals = DECIMALSFLIED_DEFAULT; }
+  decimalslField(
+    T &value,
+    constText* text,
+    constText*units,
+    T low,
+    T high,
+    T step,
+    T tune,
+    action a = doNothing,
+    eventMask e = noEvent,
+    styles s = noStyle
+  ) :decimalslField(*new menuFieldShadow<T>(value, text, units, low, high, step, tune, a, e, s)) {}
+
+  Used printTo(navRoot &root, bool sel, menuOut& out, idx_t idx, idx_t len, idx_t panelNr = 0) override {// https://github.com/neu-rah/ArduinoMenu/issues/94#issuecomment-290936646
+    //menuFieldShadow<T>& s=*(menuFieldShadow<T>*)shadow;
+    menuField<T>::reflex = menuField<T>::target();
+    idx_t l = prompt::printTo(root, sel, out, idx, len);
+    bool ed = this == root.navFocus;
+    //bool sel=nav.sel==i;
+    if (l < len) {
+      out.print((root.navFocus == this&&sel) ? (menuField<T>::tunning ? '>' : ':') : ' ');
+      l++;
+      if (l < len) {
+        l += out.print(menuField<T>::reflex, decimals);//NOTE: this can exceed the limits!
+        if (l < len) {
+          l += print_P(out, fieldBase::units(), len);
+        }
+      }
+    }
+    return l;
+  }
+
+  void setDecimals(idx_t d) { decimals = d; }
+  idx_t getDecimals(void) { return(decimals); }
+};
+//-----Custom floatField----------------END
+
+ 
+decimalslField <typeof(floatVar)>& floatFlied_Object = *new decimalslField<typeof(floatVar)>(floatVar, "f", "", -100.0, 100.0, 0.1, 1);
+decimalslField <typeof(doubletVar)>& doubleFlied_Object = *new decimalslField<typeof(doubletVar)>(doubletVar, "d", "", -100.0, 100.0, 0.1, 1);
+decimalslField <typeof(cantDecimals)>& DecimalsFlied_Object = *new decimalslField<typeof(cantDecimals)>(cantDecimals, "Dec", "", 0, 18, 1, 1, (Menu::callback)updateEvent_cb, updateEvent);
+
+void updateEvent_cb(eventMask e){
+  floatFlied_Object.setDecimals(cantDecimals);
+  doubleFlied_Object.setDecimals(cantDecimals);
+  Serial.println("");Serial.print("now using '");Serial.print(cantDecimals);Serial.println("' decimals.");
+ }
+ 
+//---Main menu  ---------------------------------
+prompt* mainData[] = {
+  &floatFlied_Object,
+  &doubleFlied_Object,
+  &DecimalsFlied_Object,
+  new Exit("<Back")
+};
+
+menuNode& mainMenu = *new menuNode("Main menu", sizeof(mainData) / sizeof(prompt*), mainData);
+
+serialIn serial(Serial);
+MENU_INPUTS(in,&serial);
+
+MENU_OUTPUTS(out,MAX_DEPTH
+  ,SERIAL_OUT(Serial)
+  ,NONE//must have 2 items at least
+);
+
+NAVROOT(nav,mainMenu,MAX_DEPTH,in,out);
+
+void setup() {
+  Serial.begin(115200);
+  while(!Serial);
+  Serial.println("Menu 4.x");
+  Serial.println("Use keys + - * /");
+  Serial.println("to control the menu navigation");
+  nav.useUpdateEvent = true;
+}
+
+void loop() {
+  nav.poll();
+}