# 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.                                                                                                                                                  |
| <p>printText(String textToPrint, Map\<String, Integer> printerAttributes)<br></p><p>printText(String textToPrint, Map\<String, Integer> printerAttributes, |                                                                                                                                                                                                                     |
| PrinterListener printerListener)</p>                                                                                                                       | <p>Prints the text received in the textToPrint parameter.</p><p></p><p>printerAttributes will have the attributes of the print.</p><p></p><p>printerListener will receive the PrinterListener interface methods</p> |

## Usage

{% code title="Code Example" %}

```java
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 %}