Package com.intellij.ide

Examples of com.intellij.ide.TreeExpander.canCollapse()

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*/
public abstract class TreeCollapseAllActionBase extends AnAction {
  public void actionPerformed(AnActionEvent e) {
    TreeExpander expander = getExpander(e.getDataContext());
    if (expander == null) return;
    if (!expander.canCollapse()) return;
    expander.collapseAll();
  }

  protected abstract TreeExpander getExpander(DataContext dataContext);

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  protected abstract TreeExpander getExpander(DataContext dataContext);

  public void update(AnActionEvent event) {
    Presentation presentation = event.getPresentation();
    TreeExpander expander = getExpander(event.getDataContext());
    presentation.setEnabled(expander != null && expander.canCollapse());
  }
}
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