SWT Composite consructor throws IllegalArgumentException on a non-null argument
Posted
by Alexey Romanov
on Stack Overflow
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Published on 2010-05-18T06:13:31Z
Indexed on
2010/05/18
6:20 UTC
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This piece of code (in Scala)
val contents = {
assert(mainWindow.detailsPane != null)
new Composite(mainWindow.detailsPane, SWT.NONE)
}
throws an exception:
Exception occurred
java.lang.IllegalArgumentException: Argument not valid
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.widgets.Widget.error(Unknown Source)
at org.eclipse.swt.widgets.Widget.checkParent(Unknown Source)
at org.eclipse.swt.widgets.Widget.<init>(Unknown Source)
at org.eclipse.swt.widgets.Control.<init>(Unknown Source)
at org.eclipse.swt.widgets.Scrollable.<init>(Unknown Source)
at org.eclipse.swt.widgets.Composite.<init>(Unknown Source)
at main.scala.NodeViewPresenter$NodeViewImpl.<init>(NodeViewPresenter.scala:41)
According to the documentation, IllegalArgumentException should only be thrown when the parent is null, but I am checking for that. detailsPane is a CTabFolder. Can anybody say why this could happen?
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