Mapper Property

JavaScript
WinRT JavaScript

  get_mapper();
 set_mapper(value);

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Property Value

Type	Description
AnnContainerMapper	The mapper for this AnnContainer. The default value is the object created by AnnContainerMapper.CreateDefault.

The mapper is used by this container when converting display, container and image coordinates. For more information, refer to AnnContainerMapper.

If you set the value of this property to null, then this container will use an object created from AnnContainerMapper.CreateDefault instead. Therefore, you will always get a valid object when querying the value of this property.

JavaScript

example: function SiteLibrary_DefaultPage$example() {
   var inch = 720.0;

   // Create a new annotation container, 8.5 by 11 inches
   var container = new Leadtools.Annotations.Core.AnnContainer();
   // Size must be in annotation units (1/720 of an inch)
   container.set_size(Leadtools.LeadSizeD.create(8.5 * inch, 11 * inch));

   // Set its mapper, assuming the screen DPI is 96 and the image DPI is 300
   container.set_mapper(new Leadtools.Annotations.Core.AnnContainerMapper(96, 96, 300, 300));

   // Add a blue on yellow rectangle from 3in 3in to 4in 4in
   var rectObj = new Leadtools.Annotations.Core.AnnRectangleObject();
   rectObj.set_rect(Leadtools.LeadRectD.create(3 * inch, 3 * inch, 1 * inch, 1 * inch));
   rectObj.set_stroke(Leadtools.Annotations.Core.AnnStroke.create(Leadtools.Annotations.Core.AnnSolidColorBrush.create("blue"), Leadtools.LeadLengthD.create(1)));
   rectObj.set_fill(Leadtools.Annotations.Core.AnnSolidColorBrush.create("yellow"));
   container.get_children().add(rectObj);

   // Get the rectangle in annotations units
   var rc = rectObj.get_rect();
   alert("Annotations units: " + rc.get_left() + "," + rc.get_top() + "," + rc.get_right() + "," + rc.get_bottom());

   // Convert it to image coordinates
   rc = container.get_mapper().rectFromContainerCoordinates(rc, Leadtools.Annotations.Core.AnnFixedStateOperations.none);
   alert("Image units (pixels): " + rc.get_left() + "," + rc.get_top() + "," + rc.get_right() + "," + rc.get_bottom());

   // If this container is used with an image, you can use the pixels values above to find the exact value on the image

   // Convert it to back to annotations units
   rc = container.get_mapper().rectToContainerCoordinates(rc);
   alert("Original units: " + rc.get_left() + "," + rc.get_top() + "," + rc.get_right() + "," + rc.get_bottom());
},

Mapper Property

Property Value

Reference