The Network JSF component provides support
for tiling. The tiling support consists of providing developers
with the ability of configuring the Network JSF component to
compute, cache and provide on demand only the areas of its
graphical representation that are visible to the client at one
given time, instead of computing and providing the entire area of
the graphical representation that may not be visible to the client.
Note
The tiling support provided by the JViews
TGO Network JSF component is based on the tiling support by the
underlying JViews JSF Framework. Any difference in the default
behavior as defined in the JViews JSF Framework documentation is
documented in this section.
Configuration
Tiled view
See Concepts in Advanced Features of JViews Framework for an
introduction to the use of tiling for building Web
applications.
To make tiling available in the view, you must specify a tile
size. The tile size is a critical parameter and must be chosen
with care. See Tile Size in Advanced Features of JViews Framework.
<jvtf:networkView [...] tileSize="256"/>
Server-side caching
When the view is tiled, a server-side caching mechanism for
tiles of static layers can be installed by using the
tileManager
property. No server-side caching mechanism is installed by
default.
<jvtf:networkView tileManager="#{tgoBean.tileManager}" [...]/>
See The Tile Manager in Advanced
Features of JViews
Framework for more information.
Client-side caching
In order to enable the client-side caching mechanism, the
zoomLevels
attribute must be set. When this attribute is set, the client
caches the tiles for the predefined zoom levels. See Zoom
constraints for details on how to set the predefined zoom
levels.
The API
IltFacesGraphServletSupport
The IltFacesGraphServletSupport determines
the JViews TGO specific tiling behavior at the server-side
level. By default, it uses as the static layers all the
IlvManagerLayer
instances that compose the background of your Network JSF
component. For more information on backgrounds, see Background support.
If a custom strategy is needed for
computing the tiled layers, see Developing server-side tiling
which gives more information on the relevant server-side API
that is need to customize the default behavior.