COMPARISON WITH IMAGE LISTS
The Comparison feature of the Zoomify Image Viewer displays two Viewports so that two images can be compared.
The Comparison display can also include two image lists, one for each Viewport. These lists can be used to change
the image displayed in either Viewport.
The optional value IMAGELIST is included in the comparison.xml file - not in the web page HTML. It is included in the
XML twice, once for each IMAGE.
Note that changing the image displayed in one Viewport will cause the view in that Viewport to be reset to
the initial X, Y, Zoom, and Rotation values for the new image as stated in the comparison.xml file. If the
view coordinates are updated and the Sync checkbox in the Toolbar is checked, the other Viewport's coordinates
will by sync'ed - even though its image is not being changed.
If, however, the Sync checkbox is not checked or if
no values are provided for the new image in the comparison.xml file, the view coordinates will not be changed,
but will be retained from the last state of the previously displayed image. This combination of behaviors
allows the use of the XML and Sync checkbox to change images while updating and/or synchronizing the
Viewport displays, as desired.
Note also that the width and height dimensions of all images to be compared must match or synchronization
of the two Viewport displays will not be possible. Additional information is provided in the Parameter List.htm document in the documentation folder.