Composite createControl(final Composite parent, final PreferencePage prefParent) {
Composite composite = new Composite(parent, SWT.NONE);
Font parentFont = parent.getFont();
GridLayout glayout = new GridLayout(2, false);
glayout.marginHeight = 0;
glayout.marginWidth = 0;
composite.setLayout(glayout);
composite.setFont(parentFont);
Label tableLabel = new Label(composite, SWT.NONE);
tableLabel.setText(UITexts.cabalImplsBlock_installed);
GridData gdata = new GridData(SWT.FILL, SWT.TOP, true, false);
gdata.horizontalSpan = 2;
tableLabel.setLayoutData(gdata);
tableLabel.setFont(parentFont);
Composite tableComposite = new Composite(composite, SWT.NONE);
tableComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
table = SWTUtil.createTable(tableComposite);
createColumns(tableComposite);
createViewer();
// Deep copy the implementations, replace them later.
CabalImplementationManager cMgr = CabalImplementationManager.getInstance();
impls.clear();
for (CabalImplementation impl : cMgr.getCabalImplementations()) {
impls.add(new CabalImplementation(impl));
}
viewer.setInput(impls);
// And set the current default (checked) implementation
CabalImplementation defImpl = cMgr.getDefaultCabalImplementation();
if (defImpl != null) {
CabalImplementation impl = findImplementation(defImpl.getUserIdentifier());
setCheckedCabalImplementation(impl);
}
Composite buttonsComp = new Composite(composite, SWT.NONE);
glayout = new GridLayout(1, true);
glayout.marginHeight = 0;
glayout.marginWidth = 0;
buttonsComp.setLayout(glayout);
buttonsComp.setLayoutData(new GridData(SWT.CENTER, SWT.TOP, false, false));
buttonsComp.setFont(parentFont);
createButtons(buttonsComp);
enableButtons();
return composite;
}
/** Put the Cabal implementation preferences into the preference store. */
public boolean updateCabalImplementations() {
CabalImplementationManager cMgr = CabalImplementationManager.getInstance();
Object[] selected = viewer.getCheckedElements();
CabalImplementation impl = (CabalImplementation) selected[0];
String defaultImplIdent = new String();
if (impl != null) {
defaultImplIdent = impl.getUserIdentifier();
}
cMgr.setCabalImplementations(impls, defaultImplIdent);
return true;
}
private void autoDetectCabalImpls() {
viewer.remove(impls);
viewer.setInput(null);
List<CabalImplementation> detected = CabalImplementationManager.autoDetectCabalImpls();
impls.clear();
impls.addAll(detected);
if (impls.size() > 0) {
viewer.add(impls);
viewer.setInput(impls.toArray());
setSelection(new StructuredSelection(impls.get(0)));
} else {
setSelection(new StructuredSelection());
}
viewer.refresh(true);
}
private boolean validateImpl(final CabalImplementation impl) {
return (impl != null)
&& CabalImplementationManager.isUniqueUserIdentifier(impl.getUserIdentifier(), impls);
}