i have a model with an id and a name.
I put the model object into a combobox. From the model i take the name atribute and make that the visual part, the only problem is. When you start up the program the combobox it is empty.
You have to click on it and select the second row to see the item. I would like to see the item straight away. is this possible?
public class ItemCell extends ListCell<Model> {
#Override
public void updateItem(Model person, boolean empty) {
super.updateItem(person, empty);
setText(person == null ? "" : person.getFirstName());
}
}
in my view class i have:
ComboBox<Model> comboBox = new ComboBox<>();
comboBox.setCellFactory(lv -> new ItemCell());
comboBox.setButtonCell(new ItemCell());
comboBox.valueProperty().addListener((o, oldValue, newValue) -> {
personModelFromCombobox = otherObject.getPerson();
});
as you see it does everything correct except you have to click on it and select the second row to see the item.
this happens because you do not select an item in the comboBox
comboBox.getSelectionModel().select(index);
where index is the integer position of the item to select in the selection model, or a value from and of the same type as the arrayList.
Related
I'm designing a project about cataloging something. In this project user must be able to create his own table as he wish. Therefore I do not have any static class and instance of it.
I'm creating a diaglog pane and I can create textfields for user inputs according to column names of database table dynamically but how can i add those user's inputs into the tableView ?
As I can add any String input into the ListView can I add user String inputs into tableView columns?
ListView<String> listView = new ListView();
public ObservableList<String> listCatalogNames = FXCollections.observableArrayList();
listCatalogNames.add("Books");
More details with an example;
There is listview that contains all catalog names and according to lisview selection tableview will be created dynamically center of borderpane.
User have books(name, author, page) and movies(name, year, director, genree) catalogs.
Lets say user selected movies and tableView appeared with 4 columns and clicked add button. Diaglog pane created with 4 textfield. I built everything until that point but I cannot add user's input into the tableView because i dont have any static class for Movies or Books etc.
Is there any way to create dynamic class ?
Please give me an idea and help me about that situation.
here is the github link of our project
Just use String[] storing the Strings for every column of a row (or a similar data structure) as item type for the TableView. It should be simple enough to create a String[] from the inputs and add it to this TableView:
static TableView<String[]> createTable(String... columnNames) {
TableView<String[]> table = new TableView<>();
for (int i = 0; i < columnNames.length; i++) {
final int index = i;
TableColumn<String[], String> column = new TableColumn<>(columnNames[i]);
column.setCellValueFactory(cd -> new SimpleStringProperty(cd.getValue()[index]));
table.getColumns().add(column);
}
return table;
}
Adding a String[] userInputs to a TableView<String[]> table would be done like this:
table.getItems().add(userInputs);
A similar issue (creating a TableView based on the metadata of a ResultSet) can be found here: How to fill up a TableView with database data
Easiest solution that comes to my mind is to make use of polymorphism. You can create a super class of both Book and Movie, let's call it Item. Then you can declare your table to contain Item and cast to one of the concrete classes when you need to.
I have a TreeView and a Button in my program. Whenever this Button is clicked, it adds a new element right after the element selected last in the TreeView.
For example, if I were to select the "Test Action" element and click the "Add" button, it should add another TreeItem right after "Test Action", but before "Test Condition".
I've written code so that I can keep track of the element selected last:
#FXML
TreeView<String> view;
TreeItem<String> current = root;
view.selectionModelProperty().addListener(new ChangeListener<MultipleSelectionModel<TreeItem<String>>>() {
#Override
public void changed(ObservableValue<? extends MultipleSelectionModel<TreeItem<String>>> observable,
MultipleSelectionModel<TreeItem<String>> oldValue,
MultipleSelectionModel<TreeItem<String>> newValue) {
current = newValue.getSelectedItem();
}
});
However, through the use of the TreeItem, "current", there is no method I can use to find its index in the TreeView.
This is so that I can do:
root.getChildren().add(index, new TreeItem<String>(new OpenBank().getAction(), Icons.ACTION.getIcon()));
So is there a way to find a child's index in a TreeView?
The class TreeItem has a method getParent, which returns the parent of the specified TreeItem. This parent, which is also a TreeItem has a method getChildren to get the child TreeItems; the order of TreeItems in the returned ObservableList is the actual order that you can see on the screen, therefore you can insert a new element in a specific index with add after you retrieved the index of the element in the list with indexOf().
You can simply handle the current selection in the event listener of your Button:
Button b = new Button("Add");
b.setOnAction(event -> {
// Get the selected item
TreeItem<String> selectedItem = treeView.getSelectionModel().getSelectedItem();
// If there is no selection or the root is selected do nothing
if (selectedItem == null || selectedItem == rootNode)
return;
// Otherwise get the index of the Node from the children of its parent
// and append the new item right after it
int index = selectedItem.getParent().getChildren().indexOf(selectedItem);
selectedItem.getParent().getChildren().add(index+1, new TreeItem<>("New Item"));
});
If you already tracking the current selection:
The modification is just to use current (that's how you named your variable) rather than getting the selection in the handler:
Button b = new Button("Add");
b.setOnAction(event -> {
// If there is no selection or the root is selected do nothing
if (current == null || current == rootNode)
return;
// Otherwise get the index of the Node from the children of its parent
// and append the new item right after it
int index = current.getParent().getChildren().indexOf(current);
current.getParent().getChildren().add(index+1, new TreeItem<>("New Item"));
});
TreeItem::getRow
Returns the index position of the given TreeItem, assuming that it is
currently accessible through the tree hierarchy (most notably, that
all parent tree items are expanded). If a parent tree item is
collapsed, the result is that this method will return -1 to indicate
that the given tree item is not accessible in the tree.
i need to know how to catch the event that happens when a row is deleted from the TableView and the index of the row. At this moment when a row is deleted from the Table View the TableView.getSelectionModel().clearSelection() method is called. But i want is to select the last index available in the Table View.
Tableview.getSelectionModel().clearAndSelect() is not an option, because sometimes a row is deleted automatically.
Regards
For a table with type, for example, Person:
import javafx.collections.ListChangeListener.Change ;
// ....
TableView<Person> table = ... ;
table.getItems().addListener((Change<? extends Person> c) -> {
while(c.next()) {
if (c.wasRemoved()) {
int numRemoved = c.getRemoved().size();
int index = c.getFrom();
System.out.println(numRemoved + " items removed from table at index "+index);
}
}
});
The ListChangeListener.Change documentation describes the values returned by c.getFrom(), c.getTo(), c.wasRemoved(), c.getAdded(), etc. under various scenarios.
I have set TextField in column as below in Tableview
setGraphic(textField);
then I have added changeListener to get updated text, so now I also want to get row and column number.
setGraphic(textField);
textField.textProperty().addListener(new ChangeListener<String>() {
public void changed(final ObservableValue<? extends String> observableValue,
final String oldValue,final String newValue)
{
System.out.println("old "+oldValue+" and new : "+newValue);
// Here,How can i get the particuler row number
} });
Assuming that you are selecting one TableView cell, and you want to get its column and the row index.
Get the TableView from your TableCell:
TableView table = this.getTableView();
Then, the TablePosition from the first SelectionModel:
TablePosition firstCell = table.getSelectionModel().getSelectedCells().get(0);
Finally, the column and row index :
firstCell.getColumn() //int
firstCell.getRow() //int
I am new to JavaFX. I have created a TableView that looks like the image attached.
I would like to show a tool tip on each cell of the table when I mouse over. I have already set two CellFactory; one to display a check-box in the first column and one to display an image in the second column.
So showing Tool Tip must not affect these two rendered columns. Is there any way to show tool tip on each cell of the table on mouse over and that should not affect other individual column cell rendering.
Here is what I did when I needed a tool tip in the cells of a certain column:
TableColumn<Person, String> nameCol = new TableColumn<Person, String>("Name");
nameCol.setCellFactory
(
column ->
{
return new TableCell<Person, String>()
{
#Override
protected void updateItem(String item, boolean empty)
{
super.updateItem(item, empty);
setText( item );
setTooltip(new Tooltip("Life is short, make most of it..!"));
}
};
});
Here's a generic solution, if anyone is looking for something easy. It follows the same convention as other custom cell factories.
Just make a new class and paste TooltippedTableCell into it; then set the custom cell factory of your desired column like so:
someColumn.setCellFactory(TooltippedTableCell.forTableColumn());
just create tool tip and install on the node which you want
Cell c = new Cell();
Tooltip.install(c, new Tooltip("text"));