Here is a Pluggable Java Component from Andreas Weiden, to have expandable/collapsable canvas.

It allows a simple Push Button Item to expand/collapse the whole content of a canvas like a Tree item.

Accordion Java Bean

The Java source


The implementation class of the PJC (PushButton Item)


The PJC initialisation

     Read the content of the PK_AKKORDION.txt file from the zip file

The sample dialog

     . Download the accordion.zip file
     . Unzip the accordion.zip file
     . Copy the accordion.jar file in your /forms/java/ folder
     . Add it to the archive and archive_jini tags of the /forms/server/formsweb.cfg file
     . Open the ACCORDION.fmb and ACCORDION2.fmb modules (Oracle Forms
     . Compile all and run the module