Unable to show the Tool Tip on the JavaFX TableView cell value

Question

In my JavaFX TableView I have one TableColumn on which I have set Cell Factory to render ProgressBar and for other TableColumns I have set Cell Factory to show ToolTip. Like the image below. Second Column is showing Progress Bar and other 3 Columns are render to show Tool tip, that has simple string values to show.

I was getting issue in which the TableView was not displaying/showing updated values in the table i.e UI is not validating/refreshing/painting the TableView elements. If I clicked on ColumnHeader to sort any column then only I can see the TableView updating. Manually sort the table column to refresh the table content is not making sense so I have searched and found solution to show/hide the Table Columns for updating the Table View.

To resolved the issue I have written a code below to solve the TableView Updating/Refreshing issue but due to this code now ToolTip are not getting visible.

Code to Update Table View after each specific interval

 class TableProgressBarUpdator implements Runnable {

        TableView table;

        public TableProgressBarUpdator(TableView fxtable) {
            table = fxtable;

        }

        public void start() {
            new Thread(this).start();
        }

        public void run() {

            while (keepUpdating) {
                try {
                    updateProgressbar();
                    Thread.sleep(1000);
                } catch (Exception e) {
                    LogHandler.doErrorLogging("Error while updating tables cell", e);
                }
            }
            LogHandler.doDebugLogging("Table process repainting is completed.");
        }

        private void updateProgressbar() throws Exception {
            Platform.runLater(new Runnable() {
                @Override
                public void run() {
                    ((TableColumn) table.getColumns().get(0)).setVisible(false);
                    ((TableColumn) table.getColumns().get(0)).setVisible(true);
                }
            });


        }
    }

Start Updating Table View

public void startUpdatingTableProgress() {
    keepUpdating = true;
    TableProgressBarUpdator tpu = new TableProgressBarUpdator(table);
    tpu.start();
}

Stop Updating Table View

public void stopUpdatingTableProgress() {
        keepUpdating = false;
    }

Adding more code that is showing render classes to show Progress bar and display Tool Tip.

Code to show the Progress Bar Table View.

public static class ProgressBarTableCell<S, T> extends TableCell<S, T> {

        private final ProgressBar progressBar;
        private ObservableValue<T> ov;

        public ProgressBarTableCell() {
            this.progressBar = new ProgressBar();
            progressBar.setPrefHeight(23);
            setAlignment(Pos.CENTER);
        }

        @Override
        public void updateItem(T item, boolean empty) {
            super.updateItem(item, empty);
            if (item == null) {
                setGraphic(null);
                setText(null);
            } else {
                if (item.toString().equalsIgnoreCase("Processing")) {
                    Platform.runLater(new Runnable() {
                        @Override
                        public void run() {

                            if (getGraphic() == null) {
                                setGraphic(progressBar);
                                progressBar.setProgress(-1);
                            } else {
                                ProgressBar objpProgressBar = (ProgressBar) getGraphic();
                                objpProgressBar.setProgress(-1);
                            }
                            setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
                        }
                    });
                } else {
                    Platform.runLater(new Runnable() {
                        @Override
                        public void run() {
                            if (getGraphic() == null) {
                                setGraphic(progressBar);
                                progressBar.setProgress(0);
                            } else {
                                ProgressBar objpProgressBar = (ProgressBar) getGraphic();
                                objpProgressBar.setProgress(0);
                            }
                            setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
                        }
                    });
                }
            }
        }
    } 

Code to Show the Tool Tip

public class ToolTip extends TableCell {

        @Override
        protected void updateItem(Object object, boolean selected) {
            if (object == null) {
                setGraphic(null);
                setText(null);
            }else{
                setText(object.toString());
                setTooltip(new Tooltip(object.toString()));
            }
        }
    }

Issue -

If I comment-out these two lines from TableProgressBarUpdator Class then I am able to see Tool Tip for each cell values in 1st, 3rd and 4th column but now Table View contents are not updating/refreshing and when I UN-comment these lines I am unable to see the Tool Tip.

((TableColumn) table.getColumns().get(0)).setVisible(false);
((TableColumn) table.getColumns().get(0)).setVisible(true);

In all due to these two lines my Tool Tip Render is not working and If I remove these two lines then Table View Content are not Refreshing/Updating.

Answer 1

You don't need to update TableView manually. may be there are problem in your class associated with that TableView's column.

You have to create class as given below :

public static class Test{

private StringProperty name;

private Test() {
   name = new SimpleStringProperty();
}

public Test(String name) {
    this.name = new SimpleStringProperty(name);
}

public void setName(String name) {
    this.name.set(name);
}

public String getName() {
    return name.get();
}

public StringProperty nameProperty() {
    return name;
}

}