There is a method getCompletionProposalAutoActivationCharacters in ContentAssistProcessor that can return characters which trigger the completion proposals. For example I can return new char[] { '.' } so that each time I type dot in the editor the word completion proposal shows up.
I thought that there should be a simular way to specify shortcut key stroke to trigger content assist such as Alt + /, but actually that's different.
What is the best way to do this? I personally don't want to hard code a key listener for this.