Bug 16923 Auto activation preference dialog
The auto activation characters and Timeout Text fields are enabled even when Auto activation itself is disabled. This was confusing to me because I thought that "." should cause automatic code assist, but it wasn't. Disabling the feature should disable the controls what modify the details for that feature.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
folder.setLayoutData(new GridData(GridData.FILL_BOTH));
		
		TabItem item= new TabItem(folder, SWT.NONE);
		item.setText(JavaUIMessages.getString("JavaEditorPreferencePage.general")); 
		item.setControl(createAppearancePage(folder));
		
		item= new TabItem(folder, SWT.NONE);
		item.setText(JavaUIMessages.getString("JavaEditorPreferencePage.colors")); 
		item.setControl(createColorPage(folder));
		
		item= new TabItem(folder, SWT.NONE);
		item.setText(JavaUIMessages.getString("JavaEditorPreferencePage.codeAssist")); 
		item.setControl(createContentAssistPage(folder));
		item= new TabItem(folder, SWT.NONE);
		item.setText("Problem Indi&cation");
		item.setControl(createProblemIndicationPage(folder));
		
		initialize();
		
		return folder;
	}
	
	private void initialize() {
		
		fFontEditor.setPreferenceStore(getPreferenceStore());
		fFontEditor.setPreferencePage(this);
		fFontEditor.load();
		
		initializeFields();