add simple example

1 files changed, 52 insertions, 0 deletions

diff --git a/contrib/gofpdi/gofpdi_test.go b/contrib/gofpdi/gofpdi_test.go
new file mode 100644
index 0000000..1ecc5ca
--- /dev/null
+++ b/contrib/gofpdi/gofpdi_test.go
@@ -0,0 +1,52 @@
+package gofpdi
+
+import (
+	"bytes"
+	"github.com/jung-kurt/gofpdf"
+	"github.com/jung-kurt/gofpdf/internal/example"
+	"io"
+)
+
+func ExampleGofpdiImporter() {
+	// create new pdf
+	pdf := gofpdf.New("P", "pt", "A4", "")
+
+	// for testing purposes, get an arbitrary template pdf as stream
+	rs, _ := getTemplatePdf()
+
+	// create a new Importer instance
+	imp := NewImporter()
+
+	// import first page and determine page sizes
+	tpl := imp.ImportPageFromStream(pdf, &rs, 1, "/MediaBox")
+	pageSizes := imp.GetPageSizes()
+	nrPages := len(imp.GetPageSizes())
+
+	// add all pages from template pdf
+	for i := 1; i <= nrPages; i++ {
+		pdf.AddPage()
+		if i > 1 {
+			tpl = imp.ImportPageFromStream(pdf, &rs, i, "/MediaBox")
+		}
+		imp.UseImportedTemplate(pdf, tpl, 0, 0, pageSizes[i]["/MediaBox"]["w"], pageSizes[i]["/MediaBox"]["h"])
+	}
+
+	// output
+	fileStr := example.Filename("contrib_gofpdi_Importer")
+	err := pdf.OutputFileAndClose(fileStr)
+	example.Summary(err, fileStr)
+	// Output:
+	// Successfully generated ../../pdf/contrib_gofpdi_Importer.pdf
+}
+
+func getTemplatePdf() (io.ReadSeeker, error) {
+	tpdf := gofpdf.New("P", "pt", "A4", "")
+	tpdf.AddPage()
+	tpdf.SetFont("Arial", "", 12)
+	tpdf.Text(20, 20, "Example Page 1")
+	tpdf.AddPage()
+	tpdf.Text(20, 20, "Example Page 2")
+	tbuf := bytes.Buffer{}
+	err := tpdf.Output(&tbuf)
+	return bytes.NewReader(tbuf.Bytes()), err
+}