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  1. JDK
  2. JDK-8091982

[TabPane] Focus Tab content on Tab selection

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    • Type: Enhancement
    • Status: Open
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: tbd
    • Component/s: javafx
    • Labels:

      Description

      When a Tab is selected, it often makes a lot of sense to focus an element in the tab content, e.g. an input field. However, this is hardly possible. The following example does not work:


      import javafx.application.Application;
      import javafx.application.Platform;
      import javafx.scene.Scene;
      import javafx.scene.control.Tab;
      import javafx.scene.control.TabPane;
      import javafx.scene.control.TextArea;
      import javafx.stage.Stage;

      public class FocusTabContent extends Application {

          public static void main(String[] args) {
              launch(args);
          }

          @Override
          public void start(Stage stage) throws Exception {
              TabPane tabPane = new TabPane();
              Tab tab1 = createTab("tab1");
              Tab tab2 = createTab("tab2");
              tabPane.getTabs().addAll(tab1, tab2);
              stage.setScene(new Scene(tabPane));
              stage.show();
          }

          private Tab createTab(String text) {
              Tab tab = new Tab(text);
              TextArea textArea = new TextArea();
              tab.setContent(textArea);
              tab.selectedProperty().addListener(obs -> {
                  if(tab.isSelected()) {
                      textArea.requestFocus(); // does not work
                      Platform.runLater(() -> textArea.requestFocus()); // neither does this
                  }
              });
              return tab;
          }
      }


      There is a suggested solution that uses Timer/Timeline [1] and another one that listens to mouse events on TabPane (and hence does not work for Ctrl+Tab selection or selection through API) [2]. They are both just suboptimal hacks.

      I think this functionality should be supported more directly. Maybe a boolean property `focusContent` on Tab would do, which would allow the user to control whether to transfer focus to Tab content when the Tab gets the focus.

      [1] http://stackoverflow.com/a/19046535/
      [2] http://stackoverflow.com/a/15648609/

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            Assignee:
            Unassigned Unassigned
            Reporter:
            tmikula Tomas Mikula
            Votes:
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              Dates

              Created:
              Updated:
              Imported: