Log Book Report

This guide will show you how to create a sample logbook document.

Before you begin #

Before you begin, you should get your API key from your UniCloud account.

If this is your first time using UniPDF SDK, follow this guide to setup a local development environment.

Clone the project repository #

In your terminal, clone the examples repository. It contains the Go code we will be using for this guide.

git clone https://github.com/unidoc/unipdf-examples.git

Navigate to the templates/log-book-report folder in the unipdf-examples directory.

cd unipdf-examples/templates/log-book-report

How it works #

The import section in lines 9-22 imports the necessary UniPDF packages and other libraries. The init function in lines gets your license key and authenticates your request.

The Item object in lines 35-48 represents logbook item. The LogBookData in lines 51-55 which contains the log book Item represents the data used in the template.

In lines 57-169 the main function is defined. In this function in lines 58-60 the Creator object is instantiated and the page margins are set. In lines 63-66 the template is read using readTemplate("templates/main.tpl").

In the lines 68-81 some necessary fonts are loaded from file. In line 84-87 the json data is read. In line 88 the data is split using splitData(data.Items). The TemplateOptions is created in 91-111. The logbook data map is created in lines 114-119. The main template is drawn in lines 121-123 using c.DrawTemplate. The front page is drawn in lines 126-137. The header and the footer are drawn in lines 157-163 using the following code.

	c.DrawHeader(func(block *creator.Block, args creator.HeaderFunctionArgs) {
		draw("templates/header.tpl", block, args.PageNum)
	})

	c.DrawFooter(func(block *creator.Block, args creator.FooterFunctionArgs) {
		draw("templates/footer.tpl", block, args.PageNum)
	})

Finally the document is written c.WriteToFile("unipdf-log-book.pdf") in lines 166-168.

The function readTemplate in lines 172-184 is to read the template file. The readData function in lines 187-200 reads the json data and returns a decoded LogBookData object.

The function splitData defined in lines 203-225 splits the whole data to fractions which are rendered in each page.

Run the code #

Run the code using the following command.

go run pdf_log_book.go

Sample Output #

The following image show the preview of the logbook document.