/**
* Returns true if given structured selection matches the conditions specified in the registry for
* this action.
*/
private boolean isEnabledFor(ISelection sel) {
Object obj = sel;
int count = sel.isEmpty() ? 0 : 1;
if (verifySelectionCount(count) == false) {
return false;
}
// Compare selection to enablement expression.
if (enablementExpression != null) {
return enablementExpression.isEnabledFor(obj);
}
// Compare selection to class requirements.
if (classes.isEmpty()) {
return true;
}
if (obj instanceof IAdaptable) {
IAdaptable element = (IAdaptable) obj;
if (verifyElement(element) == false) {
return false;
}
} else {
return false;
}
return true;
}
private void updateRemoveButtons(boolean updateRemove, boolean updateRemoveAll) {
TablePart tablePart = getTablePart();
Table table = tablePart.getTableViewer().getTable();
TableItem[] tableSelection = table.getSelection();
if (updateRemove) {
ISelection selection = getViewerSelection();
tablePart.setButtonEnabled(
3,
isEditable()
&& !selection.isEmpty()
&& selection instanceof IStructuredSelection
&& ((IStructuredSelection) selection).getFirstElement() instanceof IProductPlugin);
}
int count = fPluginTable.getTable().getItemCount();
if (updateRemoveAll) tablePart.setButtonEnabled(4, isEditable() && count > 0);
tablePart.setButtonEnabled(2, isEditable() && count > 0);
tablePart.setButtonEnabled(5, isEditable() && tableSelection.length == 1);
}
private void updateSelectionBasedEnablement(ISelection theSelection, boolean available) {
if (available) fAddButton.setEnabled(!theSelection.isEmpty());
else fRemoveButton.setEnabled(!theSelection.isEmpty());
}