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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 title="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);

{% endcode %}