Programmatically Working with Annotations

The API offers methods to perform create, read, update and delete operations on annotations. Other API methods available are for selection/de-selection of marks, obtaining selected annotations, re-ordering of annotation mark objects (within a z-order of a page), and loading and saving of annotations.

Creating and Updating Annotations

All annotation types, except PCCViewer.Mark.Type.HighlightAnnotation, can be created using the method PCCViewer.addMark. When adding annotations programmatically using the addMark method to distant pages of a large document, or if you are not sure if your annotation object will straddle the page width and height boundaries, it is recommended that you use the requestPageAttributes method to obtain width and height of a page. This will help you to remain within the confines of the image rectangle when specifying width and height of the annotation’s dimensions (rectangle or start point and end point). Currently, the HighlightAnnotation can only be created programmatically after a search and this type of annotation can extend to more than one page.

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var pageNumber = 1; var promise = viewer1.requestPageAttributes(1); promise.then( function(pageAttributes){ try{ //create stamp annotation on page 1 var stampMark1 = viewer1.addMark(1, PCCViewer.Mark.Type.StampAnnotation); //update the created rectangle mark using the property setters //use width and height obtained in the promise object to place the stamp annotation object // assume the width obtained was 612 and height 792. stampMark1.setRectangle({x: 250, y: 50, width : pageAttributes.width – 300, height: pageAttributes.height – 500}); //provide the label for the stamp mark stampMark1.setLabel("Reviewed"); //set the color to red stampMark1.setColor("#ff0000"); // … add more annotations on this page 1 …. var rectangleMark1 = viewer1.addMark(1, PCCViewer.Mark.Type.RectangleAnnotation); rectangleMark1.setRectangle(x: 250, y: 50, width : pageAttributes.width – 300, height: pageAttributes.height – 500); //set fillcolor to blue rectangleMark1.setFillColor("0000ff"); } catch(e){ alert("ERROR: " + e); } }, function(rejectedReason) { alert("Unable to add annotations because page attributes promise was rejected, error = " + rejectedReason); } );

Example

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var pageNumber = 1;
var promise = viewer1.requestPageAttributes(1);
promise.then(
     function(pageAttributes){
        try{
            //create stamp annotation on page 1
             var stampMark1 = viewer1.addMark(1,  PCCViewer.Mark.Type.StampAnnotation);
             //update the created rectangle mark using the property setters
             //use width and height obtained in the promise object to place the stamp annotation object
             // assume the width obtained was 612 and height 792.
            stampMark1.setRectangle({x: 250, y: 50,  width :      
                  pageAttributes.width – 300, height: pageAttributes.height – 500});
            //provide the label for the stamp mark
            stampMark1.setLabel("Reviewed");
           //set the color to red
           stampMark1.setColor("#ff0000");
           // … add more annotations on this page 1 ….
          var rectangleMark1 = viewer1.addMark(1,  PCCViewer.Mark.Type.RectangleAnnotation);
          rectangleMark1.setRectangle(x: 250, y:  50,  width :      
                 pageAttributes.width – 300, height: pageAttributes.height – 500);
         //set fillcolor to blue
         rectangleMark1.setFillColor("0000ff");
        }
        catch(e){
              alert("ERROR: " + e);
        }
      },
      function(rejectedReason) {
             alert("Unable to add annotations because page attributes promise was rejected, error = " + 
                   rejectedReason);
     }
);

Programmatically Creating Highlight Annotations

The following example shows how to programmatically create highlight annotations:

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var requestObject1 = viewer1.search("happy"); requestObject1.on (PCCViewer.EventType.SearchCompleted, function (event) { var searchResults = event.completedSearchResults; //create highlight annotation from the 2nd search result var highlightMark = viewer.convertToHighlight(searchResults[1]); } );

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var requestObject1 = viewer1.search("happy");
requestObject1.on (PCCViewer.EventType.SearchCompleted, function (event) {
var searchResults = event.completedSearchResults;
//create highlight annotation from the 2nd search result
var highlightMark = viewer.convertToHighlight(searchResults[1]);
 }
);

Reading Annotations Properties

Property getters can be used to obtain current property values. It is not necessary to use requestPageAttributes method for these operations.

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var label = stampMark1.getLabel(); var rectangle = stampMark1.getRectangle();

Selecting Annotations

The following example shows how to select annotations:

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//get all marks var marks = getAllMarks(); //select annotations returned by the above getAllMarks() call (marks is an array) viewer1.selectMarks(marks);

The graphic below shows the previously created marks are selected after selectMarks call:

Deselecting Annotations

The following example shows how to deselect annotations:

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//Get theselected marks var selectedMarks = viewer1.getSelectedMarks(); if(selectedMarks.length > 0 ) { //deselect all the marks in all the pages viewer1.deselectMarks(); //programmatically check if all marks were deselected var checkSelectedMarks = viewer1.getSelectedMarks(); if(checkSelectedMarks.length === 0 ) { alert("All annotations marks were deselected"); }

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//Get theselected marks
var selectedMarks = viewer1.getSelectedMarks();
if(selectedMarks.length > 0 ) {
    //deselect all the marks in all the pages
    viewer1.deselectMarks(); 
   //programmatically check if all marks were deselected
    var checkSelectedMarks = viewer1.getSelectedMarks();
   if(checkSelectedMarks.length === 0 ) {
         alert("All annotations marks were deselected");
  }

Reordering Annotations

Reordering of marks applies to all marks on a single page. Reordering does not apply to Highlight annotations because these type of marks need to remain attached to the Text on the page.

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//use moveMarkToFront to bring mark to the front viewer1.moveMarkToFront(rectangleMark1); //use moveMarkToBack to the back viewer1.moveMarkToFront(stampMark1); //use moveMarkForward to bring the mark one slot forward viewer1.moveMarkForward(rectangleMark1); //use moveMarkBackward to move the mark one slot backward viewer1.moveMarkBackward(rectangleMark1);

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//use moveMarkToFront to bring mark to the front
viewer1.moveMarkToFront(rectangleMark1);

//use moveMarkToBack to the back
viewer1.moveMarkToFront(stampMark1);

//use moveMarkForward to bring the mark one slot forward
viewer1.moveMarkForward(rectangleMark1);

//use moveMarkBackward to move the mark one slot backward
viewer1.moveMarkBackward(rectangleMark1);

Deleting Annotations

The following example shows how to delete annotations:

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//In this example we will delete all the marks that are selected //Get theselected marks var selectedMarks = viewer1.getSelectedMarks(); //delete if there were any selected if(selectedMarks.length > 0 ) { //delete all the selected marks viewer1.deleteMarks(selectedMarks); }

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//In this example we will delete all the marks that are selected
//Get theselected marks
var selectedMarks = viewer1.getSelectedMarks();
//delete if there were any selected
if(selectedMarks.length > 0 ) {
    //delete all the selected marks
    viewer1.deleteMarks(selectedMarks);
}

Saving Annotations

You can save annotations created in the currently displayed document using the saveMarkup method:

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var savedRecordName = 'my annotations'; returnValue = viewer1.saveMarkup(savedRecordName); returnValue.then( function(recordName) { //succeeded savedRecordName = recordName; }, function(rejectedReason) { //failed alert("There was error in saving annotations, error: " + rejectedReason); } );

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var savedRecordName = 'my annotations';
returnValue = viewer1.saveMarkup(savedRecordName);
returnValue.then(
             function(recordName) {
                  //succeeded
                  savedRecordName = recordName;
            },
            function(rejectedReason) {
                 //failed
                 alert("There was error in saving annotations, error: " + rejectedReason);
           }       
);

The markup is saved to an XML file using a filename that includes a unique ID for the document being viewed and the provided annotation record name, so valid filename characters are required. When later viewing the document, the saved markup can be loaded by passing the record name to the PCCViewer.ViewerControl#loadMarkup method.

Loading Annotations

Any previously saved annotations record associated with the document can be used to load annotations using the loadMarkup method:

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var currentlyLoadedAnnotations; var returnValue = viewer1.saveMarkup(savedRecordName); returnValue.then( function(recordName) { //succeeded currentlyLoadedAnnotations = recordName; //update the UI now if you wish }, function(rejectedReason) { //failed alert("There was error in loading annotations, error: " + rejectedReason); } );

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var currentlyLoadedAnnotations;
var returnValue = viewer1.saveMarkup(savedRecordName);
returnValue.then(
             function(recordName) {
                  //succeeded
                  currentlyLoadedAnnotations = recordName;
                 //update the UI now if you wish
            },
            function(rejectedReason) {
                 //failed
                 alert("There was error in loading annotations, error: " + rejectedReason);
           }       
);