Add smooth (antialiased) fonts

Extensions/Button.cpp

@@ -0,0 +1,76 @@
+/***************************************************************************************
+** Code for the GFX button UI element
+** Grabbed from Adafruit_GFX library and enhanced to handle any label font
+***************************************************************************************/
+TFT_eSPI_Button::TFT_eSPI_Button(void) {
+  _gfx = 0;
+}
+
+// Classic initButton() function: pass center & size
+void TFT_eSPI_Button::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)
+{
+  // Tweak arguments and pass to the newer initButtonUL() function...
+  initButtonUL(gfx, x - (w / 2), y - (h / 2), w, h, outline, fill,
+    textcolor, label, textsize);
+}
+
+// Newer function instead accepts upper-left corner & size
+void TFT_eSPI_Button::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)
+{
+  _x1           = x1;
+  _y1           = y1;
+  _w            = w;
+  _h            = h;
+  _outlinecolor = outline;
+  _fillcolor    = fill;
+  _textcolor    = textcolor;
+  _textsize     = textsize;
+  _gfx          = gfx;
+  strncpy(_label, label, 9);
+}
+
+void TFT_eSPI_Button::drawButton(boolean inverted) {
+  uint16_t fill, outline, text;
+
+  if(!inverted) {
+    fill    = _fillcolor;
+    outline = _outlinecolor;
+    text    = _textcolor;
+  } else {
+    fill    = _textcolor;
+    outline = _outlinecolor;
+    text    = _fillcolor;
+  }
+
+  uint8_t r = min(_w, _h) / 4; // Corner radius
+  _gfx->fillRoundRect(_x1, _y1, _w, _h, r, fill);
+  _gfx->drawRoundRect(_x1, _y1, _w, _h, r, outline);
+
+  _gfx->setTextColor(text);
+  _gfx->setTextSize(_textsize);
+
+  uint8_t tempdatum = _gfx->getTextDatum();
+  _gfx->setTextDatum(MC_DATUM);
+  _gfx->drawString(_label, _x1 + (_w/2), _y1 + (_h/2));
+  _gfx->setTextDatum(tempdatum);
+}
+
+boolean TFT_eSPI_Button::contains(int16_t x, int16_t y) {
+  return ((x >= _x1) && (x < (_x1 + _w)) &&
+          (y >= _y1) && (y < (_y1 + _h)));
+}
+
+void TFT_eSPI_Button::press(boolean p) {
+  laststate = currstate;
+  currstate = p;
+}
+
+boolean TFT_eSPI_Button::isPressed()    { return currstate; }
+boolean TFT_eSPI_Button::justPressed()  { return (currstate && !laststate); }
+boolean TFT_eSPI_Button::justReleased() { return (!currstate && laststate); }

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;
+};