About LGFX_Button

This class is designed to be compatible with Adafruit GFX Library.Virtual buttons can be placed on the screen for easy control.

Usage

Define and use LGFX_Button.

LGFX_Button button();

Example:

#include <Arduino.h>
#include <M5GFX.h>
#include <M5Unified.h>
 
static int32_t w;
static int32_t h;
 
LGFX_Button button;
 
void setup(void)
{
  auto cfg = M5.config();
  M5.begin(cfg);
  w = M5.Lcd.width();
  h = M5.Lcd.height();
  button.initButton(&M5.Lcd, w / 2 , h / 2, 100, 50, TFT_RED, TFT_YELLOW, TFT_BLACK, "Btn" );
  button.drawButton();
}
 
void loop(void)
{
 
  M5.update();
  if (M5.BtnA.isPressed()) {
    button.press(true);
    button.drawButton(true);
    M5.Lcd.drawString("Button Pressed ", 0, 0, &fonts::lgfxJapanGothic_16);
    Serial.println("Pressed");
  } else {
    button.press(false);
    button.drawButton(false, "Test");
    M5.Lcd.drawString("Button Released", 0, 0, &fonts::lgfxJapanGothic_16);
    Serial.println("Released");
  }
  delay(50);
}

API

contains

Determines if the specified coordinates are included in the button position. Used to determine if a button is pressed on the touch panel.

Syntax:

bool contains(int16_t x, int16_t y)

drawButton

Draws a button. If the inverted argument is set to true, the background color is inverted.

Syntax:

void drawButton(bool inverted = false, const char* long_name = nullptr)

initButton

Initialize the button.

void initButton(M5GFX *gfx, int16_t x, int16_t y, int16_t w, int16_t h, const T& outline, const T& fill, const T& textcolor, const char* label, float textsize_x = 1.0f, float textsize_y = 1.0f)

*1.About ColorCode

isPressed

Returns the value set by press().

justPressed

Determine if a button is pressed.

Syntax:

bool justPressed()

justReleased

Determine if a button is released.

Syntax:

bool justReleased()

press

Set the button status.

Syntax:

void press(bool p)

setLabelDatum

Set the label datum..

Syntax:

void setLabelDatum(int16_t x_delta, int16_t y_delta, textdatum_t datum = middle_center)

*1.About TextDatum