GLCD library version 3 (end of life - no longer supported)

Using Arduino Displays
27

I made a function that creates a bar graph, for anyone interested. To use it, simply add this to your glcd.cpp file:

void glcd::BarGraph(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint8_t fullval, uint8_t currentval){
	float range = (float)width / (float)fullval;
	int currentwidth = currentval * range;
	GLCD.DrawRect(x, y, width, height);
	for (int i = 1; i < height; i++) {
		GLCD.DrawHLine(x, y+i, currentwidth);}
	GLCD.FillRect(x+currentwidth+1, y+1, width-currentwidth-2, height-2, WHITE);
}

And this to your glcd.h file:

void BarGraph(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint8_t max, uint8_t current);

Here is an example, that fills the graph as a clock counts up:

#include <glcd.h>
#include "fonts/fixednums15x31.h"

long sec = 0;
int min = 0;
long starttime;

	
void setup() {

	GLCD.Init(NON_INVERTED);
	GLCD.ClearScreen(); 
}


void loop() {

	gText ClockArea;
	ClockArea.DefineArea(20, 0, 6, 1, fixednums15x31);
	ClockArea.CursorToXY(2,0);
	
	sec = (millis() - starttime) / 1000;
	if (sec > 59) {
		min++;
		sec = 0;
		starttime = millis();
	}
	if (min < 10) {
		ClockArea.print(0);}
	ClockArea.print(min);
	ClockArea.print(":");
	if (sec < 10) {
		ClockArea.print(0);}
	ClockArea.print(sec);
	GLCD.BarGraph(10, 40, 108, 8, 59, sec);
}

Syntax:

GLCD.BarGraph(toprightx, toprighty, width, height, fullvalue, currentvalue);