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aligner.py
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aligner.py
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import math
import utime
class TextAlign:
"""Class to align long text accourding to screen viewport and generate lines of text into an array"""
def __init__(self, screenwidth: int, screenheight: int, charsize: int):
self._swidth = screenwidth
self._sheight = screenheight
self._charsize = charsize
self._maxchar = math.floor(screenwidth/charsize)
self._lineheight = round(charsize/2)
self._maxlines = round(screenheight/(self._charsize+self._lineheight))
def array(self, text: str):
"""This function will generate a array of possible lines"""
text_array = text.split(' ')
lines = []
lnumber = 0
for item in range(0, len(text_array)):
if len(text_array[item]) > (self._maxchar-1):
nt = []
for i in range(0, len(text_array[item]), self._maxchar-1):
nt.append(text_array[item][i:i+self._maxchar-1]+"-")
nt[len(nt)-1]=nt[len(nt)-1].replace("-","")
text_array.pop(item)
text_array[item:item] = nt
if not lines:
lines.append(text_array[item])
else:
if (len(lines[lnumber])+len(text_array[item])+1) < self._maxchar:
lines[lnumber] = lines[lnumber] + " " + text_array[item]
else:
lines.append(text_array[item])
lnumber += 1
return lines
def show(self, text: str, xindex=0, yindex=0, scroll=True):
"""This function will show text in lines, you can make scroll:False to not scrolling through lines"""
self._xindex = xindex
self._yindex = yindex
def rstIndex():
self._xindex = xindex
self._yindex = yindex
#This part added to configure lcd or oled hardware (remove this part if configured it already)
from ssd1306 import SSD1306_I2C
from machine import Pin, I2C
i2c=I2C(0,scl=Pin(1),sda=Pin(0),freq=1000000) #Change pins accourding to your config
oled = SSD1306_I2C(self._swidth,self._sheight,i2c) #You can use other screens libraries too
###
obj = self.array(text)
oled.fill(0)
if len(obj) > self._maxlines and scroll == True:
for i in range(0, len(obj)*(self._charsize+self._lineheight)):
for y in range(0, len(obj)):
oled.text(obj[y], self._xindex, self._yindex-i)
self._yindex += self._charsize+self._lineheight
oled.show()
rstIndex()
utime.sleep(0.5)
oled.fill(0)
else:
for i in range(0, len(obj)):
oled.text(obj[i], xindex, yindex)
oled.show()
yindex += self._charsize+self._lineheight