PrinterManager

Overview

PrinterManager is the class responsible for enabling printing on Cielo machines and it uses the singleton pattern to guarantee a unique instance of PrinterManager.

Atributes

The attributes will be inserted into the hashMap and will be used at the time of printing

Used in alignment - KEY_ALIGN

Name	Description
VAL_ALIGN_CENTER	Align to center
VAL_ALIGN_LEFT	Align to left
VAL_ALIGN_RIGHT	Align to right

Other features

Name	Description
KEY_TEXT_SIZE	Text size, must be an integer value
KEY_TYPEFACE	Text font, must be an integer between 0 and 8, where each value is a different font
KEY_MARGIN_LEFT	Left margin, must be an integer value
KEY_MARGIN_RIGHT	Right margin, must be an integer value
KEY_MARGIN_TOP	Top margin, must be an integer value
KEY_MARGIN_BOTTOM	Bottom margin, must be an integer value
KEY_LINE_SPACE	Spacing between consecutive lines, must be an integer value
KEY_WEIGHT	Used when printing multiple columns, to choose the weight of each column, must be an integer value

Methods

Name	Description
getInstance()	Creates a new instance or returns the instance previously created.
printText(String textToPrint, Map<String, Integer> printerAttributes) printText(String textToPrint, Map<String, Integer> printerAttributes, PrinterListener printerListener)	Prints the text received in the textToPrint parameter. printerAttributes will have the attributes of the print. printerListener will receive the PrinterListener interface methods

Usage

Code Example

HashMap<String, Integer> printerAttributes = new HashMap<>();

printerAttributes.put(PrinterAttributes.KEY_ALIGN, PrinterAttributes.VAL_ALIGN_CENTER);
printerAttributes.put(PrinterAttributes.KEY_TYPEFACE, 1);
printerAttributes.put(PrinterAttributes.KEY_TEXT_SIZE, 20);

String textToPrint = "TEXT TO PRINT";
PrinterManager.getInstance()
               .printText(textToPrint, printerAttributes);