Fix meters Widget example

TFT_eSPI.h

@@ -16,7 +16,7 @@
 #ifndef _TFT_eSPIH_
 #define _TFT_eSPIH_
 
-#define TFT_ESPI_VERSION "2.4.74"
+#define TFT_ESPI_VERSION "2.4.75"
 
 // Bit level feature flags
 // Bit 0 set: viewport capability

examples/GUI Widgets/Meters/Analogue_meters/Analogue_meters.ino

@@ -65,18 +65,23 @@ void loop()
     float value = 50.0 + 50.0 * sin((d + 0) * 0.0174532925);
 
     float current;
-    mapValue(value, current, (float)0.0, (float)100.0, (float)0.0, (float)2.0);
+    current = mapValue(value, (float)0.0, (float)100.0, (float)0.0, (float)2.0);
     //Serial.print("I = "); Serial.print(current);
     amps.updateNeedle(current, 0);
 
     float voltage;
-    mapValue(value, voltage, (float)0.0, (float)100.0, (float)0.0, (float)10.0);
+    voltage = mapValue(value, (float)0.0, (float)100.0, (float)0.0, (float)10.0);
     //Serial.print(", V = "); Serial.println(voltage);
     volts.updateNeedle(voltage, 0);
     
     float resistance;
-    mapValue(value, resistance, (float)0.0, (float)100.0, (float)0.0, (float)100.0);
+    resistance = mapValue(value, (float)0.0, (float)100.0, (float)0.0, (float)100.0);
     //Serial.print(", R = "); Serial.println(resistance);
     ohms.updateNeedle(resistance, 0);
   }
 }
+
+float mapValue(float ip, float ipmin, float ipmax, float tomin, float tomax)
+{
+  return tomin + (((tomax - tomin) * (ip - ipmin))/ (ipmax - ipmin));
+}

library.json

 {
   "name": "TFT_eSPI",
-  "version": "2.4.74",
+  "version": "2.4.75",
   "keywords": "Arduino, tft, display, ttgo, LilyPi, WT32-SC01, ePaper, display, Pico, RP2040 Nano Connect, RP2040, STM32, ESP8266, NodeMCU, ESP32, M5Stack, ILI9341, ST7735, ILI9163, S6D02A1, ILI9481, ILI9486, ILI9488, ST7789, ST7796, RM68140, SSD1351, SSD1963, ILI9225, HX8357D, GC9A01, R61581",
   "description": "A TFT and ePaper SPI graphics library with optimisation for Raspberry Pi Pico, RP2040, ESP8266, ESP32 and STM32",
   "repository":

library.properties

 name=TFT_eSPI
-version=2.4.74
+version=2.4.75
 author=Bodmer
 maintainer=Bodmer
 sentence=TFT graphics library for Arduino processors with performance optimisation for RP2040, STM32, ESP8266 and ESP32