Fixes for #3

Conditional loading of LittleFS.h dependent on processor.
Update example for new button class.

examples/Buttons/Button_demo/Button_demo.ino

@@ -1,9 +1,9 @@
-// Button widget demo, requires display with touch screen
+// Button widget demo, requires SPI display with touch screen
 
 // Requires widget library here:
 // https://github.com/Bodmer/TFT_eWidget
 
-#include "FS.h"
+#include <FS.h>
 #include "Free_Fonts.h" // Include the header file attached to this sketch
 
 #include <TFT_eSPI.h>              // Hardware-specific library
@@ -14,15 +14,15 @@ TFT_eSPI tft = TFT_eSPI();         // Invoke custom library
 #define CALIBRATION_FILE "/TouchCalData1"
 #define REPEAT_CAL false
 
-TFT_eWidget btnL = TFT_eWidget(&tft);
-TFT_eWidget btnR = TFT_eWidget(&tft);
+ButtonWidget btnL = ButtonWidget(&tft);
+ButtonWidget btnR = ButtonWidget(&tft);
 
 #define BUTTON_W 100
 #define BUTTON_H 50
 
 // Create an array of button instances to use in for() loops
 // This is more useful where large numbers of buttons are employed
-TFT_eWidget* btn[] = {&btnL , &btnR};;
+ButtonWidget* btn[] = {&btnL , &btnR};;
 uint8_t buttonCount = sizeof(btn) / sizeof(btn[0]);
 
 void btnL_pressAction(void)

examples/Sliders/Slider_demo/Slider_demo.ino

@@ -4,7 +4,7 @@
 // https://github.com/Bodmer/TFT_eWidget
 
 #include "FS.h"
-#include <LittleFS.h>
+
 #include "Free_Fonts.h" // Include the header file attached to this sketch
 
 #include <TFT_eSPI.h>

library.json

@@ -1,6 +1,6 @@
 {
   "name": "TFT_eWidget",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "keywords": "Arduino, tft, display, button, gui, graph, meter, slider",
   "description": "A TFT GUI widget library",
   "repository":

library.properties

@@ -1,5 +1,5 @@
 name=TFT_eWidget
-version=0.0.4
+version=0.0.5
 author=Bodmer
 maintainer=Bodmer
 sentence=A TFT GUI widget library

src/TFT_eWidget.h

@@ -11,6 +11,13 @@
 //Standard support
 #include <Arduino.h>
 
+// LittleFS is required for touch calibration in TFT_eSPI sketches
+#if defined (ESP8266) || defined (ESP32)
+  #include <pgmspace.h>
+  #include <FS.h>
+  #include <LittleFS.h>
+#endif
+
 #include <TFT_eSPI.h>
 
 #include "widgets/button/ButtonWidget.h"