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.
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 10.1.2.0.2)
. Compile all and run the module