Add smooth (antialiased) fonts

Extensions/Button.h

@@ -0,0 +1,38 @@
+/***************************************************************************************
+// The following button class has been ported over from the Adafruit_GFX library so
+// should be compatible.
+// A slightly different implementation in this TFT_eSPI library allows the button
+// legends to be in any font
+***************************************************************************************/
+
+class TFT_eSPI_Button {
+
+ public:
+  TFT_eSPI_Button(void);
+  // "Classic" initButton() uses center & size
+  void     initButton(TFT_eSPI *gfx, int16_t x, int16_t y,
+  uint16_t w, uint16_t h, uint16_t outline, uint16_t fill,
+  uint16_t textcolor, char *label, uint8_t textsize);
+
+  // New/alt initButton() uses upper-left corner & size
+  void     initButtonUL(TFT_eSPI *gfx, int16_t x1, int16_t y1,
+  uint16_t w, uint16_t h, uint16_t outline, uint16_t fill,
+  uint16_t textcolor, char *label, uint8_t textsize);
+  void     drawButton(boolean inverted = false);
+  boolean  contains(int16_t x, int16_t y);
+
+  void     press(boolean p);
+  boolean  isPressed();
+  boolean  justPressed();
+  boolean  justReleased();
+
+ private:
+  TFT_eSPI *_gfx;
+  int16_t  _x1, _y1; // Coordinates of top-left corner
+  uint16_t _w, _h;
+  uint8_t  _textsize;
+  uint16_t _outlinecolor, _fillcolor, _textcolor;
+  char     _label[10];
+
+  boolean  currstate, laststate;
+};