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Ink Annotation in Vue PDF Viewer component

02 Feb 2023 / 3 minutes to read

The PDF Viewer control provides the options to add, edit, and delete the ink annotations.

InkAnnotation

Adding an ink annotation to the PDF document

The ink annotations can be added to the PDF document using the annotation toolbar.

  • Click the Edit Annotation button in the PDF Viewer toolbar. A toolbar appears below it.
  • Select the Draw Ink button in the annotation toolbar. It enables the ink annotation mode.
  • You can draw anything over the pages of the PDF document.

InkTool

Refer to the following code sample to switch to the ink annotation mode.

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<template>
<div id="app">
    <button id="set">Draw Ink</button>
    <ejs-pdfviewer
        id="pdfViewer"
        ref="pdfviewer"
        :serviceUrl="serviceUrl"
        :documentPath="documentPath"
        :documentLoad="documentLoad">
    </ejs-pdfviewer>
</div>
</template>

<script>
import Vue from 'vue';
import { PdfViewerPlugin, Toolbar, Magnification, Navigation, LinkAnnotation, BookmarkView,
     ThumbnailView, Print, TextSelection, TextSearch, Annotation } from '@syncfusion/ej2-vue-pdfviewer';
Vue.use(PdfViewerPlugin);

var viewer;
export default {
  name: 'app',
  data () {
return {
  serviceUrl:"https://ej2services.syncfusion.com/production/web-services/api/pdfviewer",
  documentPath:"PDF_Succinctly.pdf"
};
  },
  provide: {
PdfViewer: [Toolbar, Magnification, Navigation, LinkAnnotation, BookmarkView,
            ThumbnailView, Print, TextSelection, TextSearch, Annotation]},

  methods: {
documentLoad() {
  viewer = this.$refs.pdfviewer.ej2Instances;
  document.getElementById('set').addEventListener('click', ()=> {
    viewer.annotation.setAnnotationMode('Ink');
  });
}
  }
}
</script>

Editing the properties of the ink annotation

The stroke color, thickness, and opacity of the ink annotation can be edited using the Edit stroke color tool, Edit thickness tool, and Edit opacity tool in the annotation toolbar.

Editing stroke color

The stroke color of the annotation can be edited using the color palette provided in the Edit Stroke Color tool.

InkStrokeColor

Editing thickness

The thickness of the border of the annotation can be edited using the range slider provided in the Edit Thickness tool.

InkThickness

Editing opacity

The opacity of the annotation can be edited using the range slider provided in the Edit Opacity tool.

InkOpacity

Setting default properties during the control initialization

The properties of the ink annotation can be set before creating the control using the InkAnnotationSettings.

After editing the default values, they will be changed to the selected values. Refer to the following code sample to set the default ink annotation settings.

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<template>
<div id="app">
    <ejs-pdfviewer
        id="pdfViewer"
        ref="pdfviewer"
        :serviceUrl="serviceUrl"
        :documentPath="documentPath"
        :inkAnnotationSettings="inkAnnotationSettings">
    </ejs-pdfviewer>
</div>
</template>

<script>
import Vue from 'vue';
import { PdfViewerPlugin, Toolbar, Magnification, Navigation, LinkAnnotation, BookmarkView,
     ThumbnailView, Print, TextSelection, TextSearch, Annotation, SignStampItem } from '@syncfusion/ej2-vue-pdfviewer';
Vue.use(PdfViewerPlugin);

var viewer;
export default {
  name: 'app',
  data () {
return {
  serviceUrl:"https://ej2services.syncfusion.com/production/web-services/api/pdfviewer",
  documentPath:"PDF_Succinctly.pdf",
  inkAnnotationSettings: {author: 'Syncfusion', strokeColor: 'green', thickness: 3, opacity: 0.6}
};
  },
  provide: {
PdfViewer: [Toolbar, Magnification, Navigation, LinkAnnotation, BookmarkView,
            ThumbnailView, Print, TextSelection, TextSearch, Annotation]}
}
</script>
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