NPE in cell.getTableRow () and cell.getTableView)

I am trying to add a ToolTip to a cell in a TableView to show some information to the user.

This is the code:

colonnaColore.setCellFactory(param -> {
            TableCell<Appuntamento, Template> cell = new TableCell<Appuntamento, Template>() {
                @Override
                protected void updateItem(Template item, boolean empty) {
                    // calling super here is very important - don't
                    // skip this!
                    super.updateItem(item, empty);
                    if (item != null && item.getColore() != null) {
                        Label color = new Label("     ");
                        color.setStyle("-fx-background-color:" + item.getColore() + "; -fx-padding:0 ");
                        setGraphic(color);
                    }
                }
            };
            /**
             * TOOLTIP SUL COLORE CHE MOSTRA IL NOME DEL TEMPLATE
             */
            log.debug("----> " + cell.getTableRow());
            Appuntamento appuntamento = cell.getTableView().getItems().get(cell.getTableRow().getIndex());
            if (appuntamento != null) {
                Tooltip tooltip = new Tooltip(appuntamento.getTemplate().getNome());
                tooltip.setWrapText(true);
                cell.setTooltip(tooltip);
            }
            return cell;
        });

In a few words: there is a factory of cell to the cell to display a color box, and then I added a ToolTip to the cell. I need information that is found in the item added to the TableView which has type "event". So I try to get my element with these codes (as in other parts of my code works); but here, I get an Exception of Null pointer on cell.getTableView () and cell.getTableRow ().

I'm probably using these methods in a way that was not planned. You can give me a hint?


Thank you!

JavaFX calls your cell factory method to create a cell in the table. You are assuming that the cell is already in the table, then you should check to see if getTableView() returns null. Actually, check getTableRow()! = null is preferable.

You'll also have a problem because these TableCells are not in a fixed location in the column. They are part of a 'virtual flow' and can be moved from line to line. Whenever the cell is moved, the updateItem method is called. Sometimes, the cell can even be used as an empty cell (a cell without data), in which case the indicator 'empty' will be set to true. So if you want to keep your ToolTips in sync with the point of the cell, you must move the code of the ToolTip in the updateItem method.

                protected void updateItem(Template item, boolean empty) {
                    super.updateItem(item, empty);
                    if (empty) {
                        setGraphic(null);
                        setTooltip(null);
                    } else {
                        Label color = new Label(item.getColore());
                        color.setStyle("-fx-background-color:" + item.getColore() + "; -fx-padding:0 ");
                        setGraphic(color);

                        if (getTableRow() != null) {
                            Appuntamento appuntamento = getTableView().getItems().get(getTableRow().getIndex());
                            Tooltip tooltip = new Tooltip(appuntamento.getTemplate().getNome());
                            tooltip.setWrapText(true);
                            setTooltip(tooltip);
                        }
                    }
                }
            };

Tags: Java

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    Is there a change of copy and paste (for example, command + option + C or something?) so that I can copy the same that in Excel, that does not change the cell references when you copy a formula elsewhere?

    Thank you!

    Hi jivejive,

    I am not in anyway you want with a group of cells. I did it with individual cells by copying the function since the Inspector formula and then paste in the Inspector in the new location.

    Quinn

  • Look of cells upward and replace function in numbers

    Hi here's a video explaining what Im trying to do. http://www.screencast.com/t/zrR5wDKEm4j7

    or here https://s3.amazonaws.com/edferrigancoaching/Video/Eds+Numbers+Request.mp4

    What I have is 2 tables. A collection of data. The other is summarizing the data. I want to finish with only 4-5 "buckets" in table two. I need a formula to take the content in a cell in the table 2 back to the one table and find all occurrences in this column and replace them with content I enter in a cell in front of the cell I want changed. The video will illustrate this.

    I searched on Fiverr experts of numbers, but only two people announced the knowledge of numbers and no one knew how to this number. Thank you this will help a lot on a long term project, I want to use it with over and over again. Ed

    < email published by host >

    Why not use the search and replace in the menu "Edit > find > find...» »

    This brings a dialog box where you can enter the search text and what to replace this text with:

  • an alphabet by typing in a cell gives drop down suggestions from previous hits on the same column. But how the drop down to choose the suggestions of the other columns and other sheets.

    an alphabet by typing in a cell gives drop down suggestions from previous hits on the same column. But how the drop down to choose the suggestions of the other columns and other sheets.

    Hi mdsavol,

    Your observations are accurate. The 'suggestions' are previous entries in the same column that correspond to what has been entered so far in the active cell. The only direct user control is to activate the function turn on or off in numbers preferences > general.

    There are other ways to include or exclude items of suggestions:

    • To remove typos in the suggestions list, the user must correct the typos in the cell above the active cell. If they are more in the list, they won't be presented as suggestions.
    • To include selections added to the list, the user must enter these suggestions in the individual cells above the active cell and column where they are wanted as suggestions.

    There was a request here a while there is a list of suggestion 'live' similar to those of some websites, which offers a descending list of possible entries as a type in an input box.

    The only way I see to reach a solution similar to what you have asked is to use as many lines at the top of the non-en-tete of the table section to list the items likely to repeat in your table, and then hide the lines. You'll need a list for each column where you want to use this feature with a list previously planted. Existing items will then require a likely hit up to three, then a click to choose from a list small enough to enter a value into a cell. News he will need to enter in full the first time, but after that it will be put on the list and answer the same thing as the terms preseeded.

    While your setting upward (or decide not to do), consider going on the menu of number (in numbers), choosing to provide feedback from numbers and writing a feature in Apple request. Describe what you want. Explain how he could help the average user numbers, and then hope for the best.

    Kind regards

    Barry

  • Enter a number in a cell empty and multiplied by the value in another cell to return a total value

    I would like a number in an empty cell that will be then multiplied by a constant number of another cell, but the result should be returned in the original empty cell.  For example, I have a cell (B3), which has a constant number (12).  In B4, I take any number (for this example, we will use 3) which will be then multiplied by the number in B3.  The result: 36 (12 X 3) will be shown in B4.  If I enter the number 5 it returns a value of 60 (12 x 5).  I do not have the numbers in parentheses, they are there as to understand my problem.


    Number using 3.6.2

    Thanks in advance!

    DaveTheDreaded

    You can't have a manually entered value and an equation in the same cell. So what you're asking can be in any spreadsheet. Generally, we put the new value in the next column and work from there.

    If you want to make a second sheet, you may have a spreadsheet, then a print sheet / display. Where you enter your values in the journal entry or table and the results show on the other hand you like.

    the last alternative is a script to move data around you, but it's really overkill.

    Jason

  • Somehow, my friends music downloaded on my phone and now I can't sync music from my computer laptop iTunes using my cell phone?

    Friends of music somehow got synced my phone. Never, I plugged my phone into his cell phone, so this is very strange. Now when I try to sync music from my laptop to iTunes on my iPhone, as I have done a million times before, it will not be synchronized. I need to get my phone to sync with my laptop and my music again as soon as possible

    You use the same Apple ID? What happens when you try to sync music from your laptop to your iPhone? You receive an error? It would be the only explanation as to why you are unable to synchronize with your laptop.

  • Is anyone having problems with their 6 s new more not to send and receive images through text messages unless your cell data are lit?  Even if I'm on wifi, I won't get it the pic unless the cell data is on?

    Is a person with problems with their new 6s more iPhone send and receive pictures via SMS?  Even if I'm on WIFI, I have my cellular data button turned to receive a picture. Then in turn instead to use WIFI, it devours my data plan. If to halfway through the month I get warnings that my data plan has almost disappeared. I did everything, including resetting the phone to factory settings. It also does not send a text if IMessage is turned on. It switches immediately to Imessaging which of course, again use my data plan. Of course, I could use some help with this. BTW, my text messaging service is connected to my phone number and not my email. Who was one of the suggestions that support Apple told me to check. Never in my life have had so many problems with a phone since I bought this iphone 6 s.

    Mgibson2425 wrote:

    Is a person with problems with their new 6s more iPhone send and receive pictures via SMS?  Even if I'm on WIFI, I have my cellular data button turned to receive a picture. Then in turn instead to use WIFI, it devours my data plan. If to halfway through the month I get warnings that my data plan has almost disappeared. I did everything, including resetting the phone to factory settings. It also does not send a text if IMessage is turned on. It switches immediately to Imessaging which of course, again use my data plan. Of course, I could use some help with this. BTW, my text messaging service is connected to my phone number and not my email. Who was one of the suggestions that support Apple told me to check. Never in my life have had so many problems with a phone since I bought this iphone 6 s.

    SMS is a function of the carrier, you will need to contact your cell phone provider and see what is the matter.

    IMessage uses very little data.

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