Handle larger button dimensions, add initButtonUL() for buttons w/upper-left coord

Adafruit_GFX.cpp

@@ -889,13 +889,25 @@ Adafruit_GFX_Button::Adafruit_GFX_Button(void) {
   _gfx = 0;
 }
 
+// Classic initButton() function: pass center & size
 void Adafruit_GFX_Button::initButton(
- Adafruit_GFX *gfx, int16_t x, int16_t y, uint8_t w, uint8_t h,
+ Adafruit_GFX *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)
 {
-  _x            = x;
-  _y            = y;
+  // 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 Adafruit_GFX_Button::initButtonUL(
+ Adafruit_GFX *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;
@@ -904,7 +916,6 @@ void Adafruit_GFX_Button::initButton(
   _textsize     = textsize;
   _gfx          = gfx;
   strncpy(_label, label, 9);
-  _label[9] = 0;
 }
 
 void Adafruit_GFX_Button::drawButton(boolean inverted) {
@@ -920,19 +931,20 @@ void Adafruit_GFX_Button::drawButton(boolean inverted) {
     text    = _fillcolor;
   }
 
-  _gfx->fillRoundRect(_x - (_w/2), _y - (_h/2), _w, _h, min(_w,_h)/4, fill);
-  _gfx->drawRoundRect(_x - (_w/2), _y - (_h/2), _w, _h, min(_w,_h)/4, outline);
+  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->setCursor(_x - strlen(_label)*3*_textsize, _y-4*_textsize);
+  _gfx->setCursor(_x1 + (_w/2) - (strlen(_label) * 3 * _textsize),
+    _y1 + (_h/2) - (4 * _textsize));
   _gfx->setTextColor(text);
   _gfx->setTextSize(_textsize);
   _gfx->print(_label);
 }
 
 boolean Adafruit_GFX_Button::contains(int16_t x, int16_t y) {
-  if ((x < (_x - _w/2)) || (x > (_x + _w/2))) return false;
-  if ((y < (_y - _h/2)) || (y > (_y + _h/2))) return false;
-  return true;
+  return ((x >= _x1) && (x < (_x1 + _w)) &&
+          (y >= _y1) && (y < (_y1 + _h)));
 }
 
 void Adafruit_GFX_Button::press(boolean p) {
@@ -956,7 +968,7 @@ boolean Adafruit_GFX_Button::justReleased() { return (!currstate && laststate);
 // the buffer is in MCU memory and not the display driver...GXFcanvas1 might
 // be minimally useful on an Uno-class board, but this and GFXcanvas16 are
 // much more likely to require at least a Mega or various recent ARM-type
-// boards (recomment, as the text+bitmap draw can be pokey).  GFXcanvas1
+// boards (recommended, as the text+bitmap draw can be pokey).  GFXcanvas1
 // requires 1 bit per pixel (rounded up to nearest byte per scanline),
 // GFXcanvas16 requires 2 bytes per pixel (no scanline pad).
 // NOT EXTENSIVELY TESTED YET.  MAY CONTAIN WORST BUGS KNOWN TO HUMANKIND.

Adafruit_GFX.h

@@ -108,8 +108,13 @@ class Adafruit_GFX_Button {
 
  public:
   Adafruit_GFX_Button(void);
+  // "Classic" initButton() uses center & size
   void initButton(Adafruit_GFX *gfx, int16_t x, int16_t y,
-   uint8_t w, uint8_t h, uint16_t outline, uint16_t fill,
+   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(Adafruit_GFX *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);
@@ -121,11 +126,11 @@ class Adafruit_GFX_Button {
 
  private:
   Adafruit_GFX *_gfx;
-  int16_t _x, _y;
-  uint16_t _w, _h;
-  uint8_t _textsize;
-  uint16_t _outlinecolor, _fillcolor, _textcolor;
-  char _label[10];
+  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;
 };

library.properties

@@ -1,5 +1,5 @@
 name=Adafruit GFX Library
-version=1.1.5
+version=1.1.6
 author=Adafruit
 maintainer=Adafruit <info@adafruit.com>
 sentence=Adafruit GFX graphics core library, this is the 'core' class that all our other graphics libraries derive from.