An overview displays the global area and a rectangle
corresponding to the area visible in the main view. You can move this
rectangle to change the area visible in the main view. This overview
is connected with the view in the usual way with the identifier.
<jvdf:diagrammerView id="diagrammer" [...] />
<jvf:overview viewId="diagrammer" [...] />
You can set whether the Overview aspect ratio is enforced
by the View aspect ratio size.
<jvf:overview id="overview" viewId="diagrammer" ignoreContentAspectRatio="true"[...] />
The default setting for the ignoreContentAspectRatio attribute
is false (disabled). When you set this
flag to true (enabled) you keep the aspect
ratio of the Overview the same as the View aspect ratio.
When you disable this flag, the initial aspect ratio
of the Overview is defined to be the smallest area around all visible
objects.
The most common reason for you to enable this attribute
is because you want to keep the size of the Overview constant, when
the View content is being modified.