Overview of JViews Diagrammer Web features
The JViews Web technology is organized hierarchically, with a common layer providing the basic infrastructure (JViews basic Web applications) on which the JViews Diagrammer Web capabilities are built.
The basic infrastructure of the JViews Web technology is implemented by encoding the JViews graphic view into a raster image by the servlet (server-side); this image is then sent to the client-side for display. Every interaction performed on the client side is mapped into requests to the servlet, which might respond with an image update. The JViews basic Web application layer provides the support for displaying and interacting with graphic views at the
IlvManagerView level, while the
JViews Diagrammer features, implemented on top of it, are based on the
IlvDiagrammer component.
The servlet processing the client requests and responding with image updates is also known as
image servlet as its main purpose is to encode a raster image as a response to certain client requests. The common infrastructure is based on the manager view (
IlvManagerView) while the
JViews Diagrammer implementation is based on
IlvDiagrammer.
The following basic functions are available on the Web browser:
Main view: displays a graphic view (
IlvManagerView) with graphic objects
Overview: displays a scaled version of the graphic view
View interactions: provide the ability to pan, zoom in and zoom out the graphic view
View tools: provide auxiliary tools to interact with the view (zoom and pan)
Object interactions: provide the ability to select and move graphic objects
Actions: trigger client and server actions through buttons, menus and interactions
Message box: a text area to display custom messages
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