Problem: Editor loses focus, clicking on it doesn't regain focus. ======================================================= Solution found at https://www.eclipse.org/forums/index.php/t/202763/ ViewPart opens Editor via some command. In some cases our Editor's setFocus method tried to delegate focus to a SWT control which was disabled thus not taking focus (false returned). Editor ignored that return value resulting in following state: - Editor has focus but no control within has focus - ViewPart had lost focus (Probably SWT's and WorkbenchPart's focus are now out-of-sync) Now clicking back into ViewPart doesn't give focus back to Viewpart, setFocus is not called by framework. Remedy: Always assure that you delegate focus to a control that takes it (returns true).