class Adafruit_GFX_Button

[mcodo]

In class Adafruit_GFX_Button there is a function for detecting if the button is pressed or has been pressed.
But I cant find any documentation for it...
How can I use this?

[pacav69]

have a look at this sketch
https://learn.adafruit.com/arduin-o-phone-arduino-powered-diy-cellphone/arduin-o-phone-sketch

a snippet from the page

// create buttons
 for (uint8_t row=0; row<5; row++) {
   for (uint8_t col=0; col<3; col++) {
     buttons[col + row*3].initButton(&tft, BUTTON_X+col*(BUTTON_W+BUTTON_SPACING_X), 
                BUTTON_Y+row*(BUTTON_H+BUTTON_SPACING_Y),    // x, y, w, h, outline, fill, text
                 BUTTON_W, BUTTON_H, ILI9341_WHITE, buttoncolors[col+row*3], ILI9341_WHITE,
                 buttonlabels[col + row*3], BUTTON_TEXTSIZE); 
     buttons[col + row*3].drawButton();
   }
 }

// go thru all the buttons, checking if they were pressed
 for (uint8_t b=0; b<15; b++) {
   if (buttons[b].contains(p.x, p.y)) {
     //Serial.print("Pressing: "); Serial.println(b);
     buttons[b].press(true);  // tell the button it is pressed
   } else {
     buttons[b].press(false);  // tell the button it is NOT pressed
   }
 }

[mcodo]

Thanx :-) This is working really good with the provided code.
But when I try on a rotated screen with two columns of four buttons in each column, the touch is not pressing the correct button :-p
Seams like it's random in a way....

btw: Screen is rotated BEFORE the button setup :-)

Button Setup:

void DrawBtns()
{
for (uint8_t row=0; row<4; row++) {
for (uint8_t col=0; col<2; col++) {
buttons[col + row2].initButton(&tft, BUTTON_X+col(BUTTON_W+BUTTON_SPACING_X),
BUTTON_Y+row*(BUTTON_H+BUTTON_SPACING_Y), // x, y, w, h, outline, fill, text
BUTTON_W, BUTTON_H, ILI9341_WHITE, ILI9341_DARKGREEN, ILI9341_WHITE,
buttonlabels[col + row2], 1);
buttons[col + row2].drawButton();
}
}
}

Inside Loop:
void loop() {
if (ts.touched() ) {
TS_Point p;
if (ts.bufferSize()) {
p = ts.getPoint();
} else {
// this is our way of tracking touch 'release'!
p.x = p.y = p.z = -1;
}

// Scale from ~0->4000 to tft.width using the calibration #'s
if (p.z != -1) {
  p.x = map(p.x, TS_MINX, TS_MAXX, 0, tft.width());
  p.y = map(p.y, TS_MINY, TS_MAXY, 0, tft.height());
}
  
for (uint8_t b=0; b<8; b++) {
  if (buttons[b].contains(p.x, p.y)) {
    #ifdef DEBUG
      Serial.print("Pressing: "); Serial.println(b);
    #endif
    buttons[b].press(true);  // tell the button it is pressed
  } else {
    buttons[b].press(false);  // tell the button it is NOT pressed
  }
}

for (uint8_t b=0; b<8; b++) {
  /*if (buttons[b].justReleased()) {
    #ifdef DEBUG
      Serial.print("Released: "); Serial.println(b);
    #endif
    buttons[b].drawButton();  // draw normal
  }*/
  
  if (buttons[b].justPressed()) {
      buttons[b].drawButton(true);  // draw invert!
      
    if (b == 0) {
        Serial.println("Pressed btn 1"); 
    }
    if (b == 1) {
        Serial.println("Pressed btn 2"); 
    }
    if (b == 2) {
        Serial.println("Pressed btn 3"); 
    }
    buttons[b].drawButton();  // draw normal
    delay(100); // UI debouncing
  }
}    

}
}

[pacav69]

As i understand it
its all to do with arrays:
when in portrait orientation row 0, col 0; row 0 col 1; row 0, col 2 .... etc
then when changed to landscape mode the col's become rows and rows become cols

how the system detects the change in orientation is done by a sensor much like what is found in a mart phone. Which then redraws the screen with the correct button positions.