I'm new in JavaFX and have the following issue:
I have a tableview inside a BorderPane. I want it to focus on the last row/1st column when it's loaded. I have tried the following:
requestfocus()
scrollTo()
focusModel.focus()
selectionModel.select()
What happens is that the cell I want is indeed blue (as if it was selected) but the first cell has a blue border. So, when I try to use the arrow keys, the selected cell moves to the first row.
BTW, I'm using TornadoFX.
Any ideas?
Thanks in advance!
class CashflowTab : View() {
override val root: HBox by fxml()
private val mController : CashflowController by inject()
private val mainView : MainView by inject()
// Get the buttons
private val buttonCashflow : Button by fxid("btnCashflow")
init {
// Setup the buttons
buttonCashflow.action {
setupCashflowTable()
}
}
/** Displays the TableView for the Cashflow */
private fun setupCashflowTable() {
var initialFocus = true
// List of entries for the category ComboBox
val categoryList = mController.getCashFlowCategoryList()
// Create the table
val cashTable = tableview<CashEntry>(mController.getCashEntryList()) {
isEditable = true
column(Constants.COL_COUNT, CashEntry::countProperty)
column(Constants.COL_DATE, CashEntry::dateProperty).makeEditable(LocaleDateConverter())
column(Constants.COL_INCOME, CashEntry::incomeProperty).makeEditable(CurrencyConverter())
column(Constants.COL_EXPENSES, CashEntry::expensesProperty).makeEditable(CurrencyConverter())
column(Constants.COL_PROFIT, CashEntry::profitProperty).converter(CurrencyConverter())
column(Constants.COL_TOTAL_PROFIT, CashEntry::totalProfitProperty).converter(CurrencyConverter())
column(Constants.COL_COMMENTS, CashEntry::commentsProperty).makeEditable()
column(Constants.COL_CATEGORY, CashEntry::categoryProperty).useComboBox(categoryList)
// Scroll to and focus on the last cell on startup
if (initialFocus) {
val lastRow = mController.getCashEntryList().size - 1
requestFocus()
scrollTo(lastRow)
focusModel.focus(lastRow)
selectionModel.select(lastRow)
initialFocus = false
}
onEditCommit {entry ->
// Update the list
mController.updateCashEntryList(entry)
// Move to the next cell
requestFocus()
focusModel.focusRightCell()
#Suppress("UNCHECKED_CAST")
selectionModel.select(focusModel.focusedCell.row, focusModel.focusedCell.tableColumn as TableColumn<CashEntry, *>)
}
enableCellEditing()
// Enable edit on key typed
addEventHandler(KeyEvent.KEY_PRESSED) {keyEvent ->
if (keyEvent.code.isDigitKey || keyEvent.code.isLetterKey) {
if (editingCell == null) {
val currentSelectedCell = selectedCell
if (currentSelectedCell != null && currentSelectedCell.tableColumn.isEditable) {
edit(currentSelectedCell.row, currentSelectedCell.tableColumn)
}
}
}
}
}
// Add the table to the view
mainView.root.center = cashTable
cashTable.tableMenuButtonVisibleProperty()
// Ensure no other node can get focus
cashTable.focusedProperty().onChange {
val focusOwner = currentStage?.scene?.focusOwnerProperty()?.value
// Check if the focus owner is the table or a cell
if (focusOwner !is TableView<*> && focusOwner !is TextField) {
cashTable.requestFocus()
}
}
}
}
You should use
Platform.runLater(() -> {
requestFocus();
scrollTo(lastRow);
...
});
to update the GUI.
Related
I am trying to implement a rowsSupportFragment using Android Leanback for android tv.
But the vertical Scrolling is not working is Keeps glitching.
class DetailsRowListFragment: RowsSupportFragment() {
private var rootAdapter : ArrayObjectAdapter = ArrayObjectAdapter(
ListRowPresenter(
FocusHighlight.ZOOM_FACTOR_MEDIUM,true)
)
private var episodeItemSelectedListener: ((Episode)->Unit)?= null
private var relatedItemSelectedListener: ((Relation)->Unit)?= null
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
//setting up adapter from within the class
adapter = rootAdapter
//Setting up listener
onItemViewSelectedListener = ItemViewSelectedListener()
}
fun bindData(animeData : AnimeDetails ){
val episodeObjectAdapter = ArrayObjectAdapter(EpisodePresenter())
animeData.episodes.forEach { it->
episodeObjectAdapter.add(it)
}
val episodeHeaderItem= HeaderItem("Episodes")
val listRow = ListRow(episodeHeaderItem,episodeObjectAdapter)
rootAdapter.add(listRow)
}
fun setOnContentSelectedListener(listener: (Episode)->Unit){
this.episodeItemSelectedListener=listener
}
private fun setRelatedRow(itemList: List<Relation>){
val relatedObjectAdapter = ArrayObjectAdapter(RelatedPresenter())
itemList.forEach { it->
relatedObjectAdapter.add(it)
}
val headerItem = HeaderItem("Related Media")
val listRow = ListRow(headerItem,relatedObjectAdapter)
rootAdapter.add(listRow)
}
inner class ItemViewSelectedListener : OnItemViewSelectedListener {
override fun onItemSelected(
itemViewHolder: Presenter.ViewHolder?,
item: Any?,
rowViewHolder: RowPresenter.ViewHolder?,
row: Row?
) {
if( row !=null && row!!.headerItem!!.name=="Episodes" && item is Episode){
episodeItemSelectedListener?.invoke(item as Episode)
}else{
Log.d("Selection Listener","Listener Activated")
}
}
}
The Implemetation of My RowsSupportFragment Class is given above
enter image description here
Whenever I try to scroll side to side using the emulator's remote the row jsut glitches and comes back to its initial position.
But I am able to move the list by dragging with my mouse cursor.
I have a spinner with an array adapter. The spinner is populated inside a fragment onCreateView().
spinner.setSelection(0)
spinner.onItemSelectedListener =
object : AdapterView.OnItemSelectedListener {
override fun onItemSelected(parent: AdapterView<*>, view: View?, pos: Int, id: Long) {
}
override fun onNothingSelected(var1: AdapterView<*>?) {
}
}
Whenever I get back to the fragment and the spinner is created, the last selected item is selected when onItemSelected() is called automatically and ignoring the spinner.setSelection(0) call.
I have put many logs to see what is going, but I cannot understand why the lately selected item is the one being selected by default and not the one at position 0.
I solved the issue by setting a click listener on the drop down view and basically do the same stuff I was doing with the OnItemSelectedListener.
override fun getDropDownView(position: Int, convertView: View?, parent: ViewGroup): View {
val binding = SpinnerItemChartDropdownBinding.inflate(
LayoutInflater.from(parent.context),
parent,
false
)
val item = getItem(position)
val root = binding.root
bindDropdown(root, item)
binding.setClickListener {
listener.onChartRangeSelected(item)
}
return root
}
One important stuff. You need to do something like this, to dismiss the drop down view after an item has been selected:
fun hideSpinnerDropDown(spinner: Spinner) {
try {
val method: Method = Spinner::class.java.getDeclaredMethod("onDetachedFromWindow")
method.isAccessible = true
method.invoke(spinner)
} catch (e: java.lang.Exception) {
e.printStackTrace()
}
}
Hey I am very new to tornadofx struggeling with async loading of data for the treeview. I am loading categories from a rest endpoint, which I want to show in there.
It seems like there's no direct data binding to the children.
when using 'bindChildren' I can provide the observable list, but I have to convert them into Node's. which then would make the populate block kind of obsolete.
What's the recommended way of doing this? I cannot find anything about this.
// Category
interface Category<T : Category<T>> {
val id: String
val name: String
val subcategories: List<T>?
}
//default category:
class DefaultCategory(override val name: String) : Category<DefaultCategory> {
override val id: String = "default"
override val subcategories: List<DefaultCategory>? = null
}
//ViewModel
class CategoryViewModel : ViewModel() {
val sourceProperty = SimpleListProperty<Category<*>>()
fun loadData() {
// load items for treeview into 'newItems'
sourceProperty.value = newItems
}
}
// TreeViewFactoryMethod
private fun createTreeView(
listProperty: SimpleListProperty<Category<*>>
): TreeView<Category<*>> {
return treeview {
root = TreeItem(DefaultCategory("Categories"))
isShowRoot = false
root.isExpanded = true
root.children.forEach { it.isExpanded = true }
cellFormat { text = it.name }
populate { parent ->
when (parent) {
root -> listProperty.value
else -> parent.value.subcategories
}
}
}
}
Assuming that on a button click I call viewmodel.loadData(), I would expect the TreeView to update as soon as there's some new data. (If I would've found a way to bind)
I've never had to use bindChildren for TornadoFX before and your use of async isn't very relevant to what I think is your primary problem. So, admittedly, this question kind of confused me at first but I'm guessing you're just wondering why the list isn't appearing in your TreeView? I've made a test example with changes to make it work.
// Category
interface Category<T : Category<T>> {
val id: String
val name: String
val subcategories: List<T>?
}
//default category:
class DefaultCategory(override val name: String) : Category<DefaultCategory> {
override val id: String = "default"
override val subcategories: List<DefaultCategory>? = null
}
//Just a dummy category
class ChildCategory(override val name: String) : Category<ChildCategory> {
override val id = name
override val subcategories: List<ChildCategory>? = null
}
//ViewModel
class CategoryViewModel : ViewModel() {
//filled with dummy data
val sourceProperty = SimpleListProperty<Category<*>>(listOf(
ChildCategory("Categorya"),
ChildCategory("Categoryb"),
ChildCategory("Categoryc"),
ChildCategory("Categoryd")
).asObservable())
fun loadData() {
sourceProperty.asyncItems {
//items grabbed somehow
listOf(
ChildCategory("Category1"),
ChildCategory("Category2"),
ChildCategory("Category3"),
ChildCategory("Category4")
).asObservable()
}
}
}
class TestView : View() {
val model: CategoryViewModel by inject()
override val root = vbox(10) {
button("Refresh Items").action {
model.loadData()
}
add(createTreeView(model.sourceProperty))
}
// TreeViewFactoryMethod
private fun createTreeView(
listProperty: SimpleListProperty<Category<*>>
): TreeView<Category<*>> {
return treeview {
root = TreeItem(DefaultCategory("Categories"))
isShowRoot = false
root.isExpanded = true
root.children.forEach { it.isExpanded = true }
cellFormat { text = it.name }
populate { parent ->
when (parent) {
root -> listProperty
else -> parent.value.subcategories
}
}
}
}
}
There are 2 important distinctions that are important.
1. The more relevant distinction is that inside the populate block, root -> listProperty is used instead of root.listProperty.value. This will make your list appear. The reason is that a SimpleListProperty is not a list, it holds a list. So, yes, passing in a plain list is perfectly valid (like how you passed in the value of the list property). But now that means the tree view isn't listening to your property, just the list you passed in. With that in mind, I would be considerate over the categories' subcategory lists are implemented as well.
2. Secondly, notice the use of asyncItems in the ViewModel. This will perform whatever task asynchronously, then set the items to list on success. You can even add fail or cancel blocks to it. I'd recommend using this, as long/intensive operations aren't supposed to be performed on the UI thread.
I have a treeview of hierarchical data that represents elements retrieved from a database. I would like to be able to move child (leaf) nodes from one parent to another and rearrange the sequence of leaf nodes within a parent via drag-and-drop, finally updating the database with the results of the move operations.
Right now I can drop one of the leaf nodes onto a parent node which allows me to add the child to the parent. However, I don't really see how to drop a leaf node between two other leaf nodes, either in the same parent or in a different parent node.
I would like to be able to do something like the following. Starting with a tree that looks like this:
Root
|
+-+-P1
| |
| +--L1a
| +--L1b
|
+-+-P2
|
+--L2a
+--L2b
For example, I would like to be able to select L2a and drag it up and drop it between L1a and L1b. Or before L1a, or after L1b. Having done that I would like to drag the child nodes of P1 around and rearrange them via DND.
Part of this would be to provide an indication of the drop location. For example, a line between L1a and L1b if you have the cursor positioned 'between' these nodes.
Is this possible? I don't see any examples of this anywhere.
One other thing I am seeing is that the effect of DND doesn't remove the leaf node from its original location even though in the setOnDragDetected method call for my cells I call cell.startDragAndDrop(TransferMode.MOVE). How can I get that to work?
Edit 9/1/17
I figured out the last part of not removing the leaf node.
Here is the code I am using to test this process out. I have an interface IStoryItem that is the (empty) interface implemented by two subclasses, Story and Part (just to create a hierarchy to test with). The Story class has title (String) and parts (Part[]) fields. The Part class has title (String) and partNumber (int) fields. I have a Utils class that creates an array of Story objects to populate my TreeView instance.
Here is my controller class. It's a bit long and in need of cleanup but shows what I have tried so far.
public class Controller {
public TreeView<IStoryItem> tv;
private final DataFormat objectDataFormat = new DataFormat("application/x-java-serialized-object");
class StoryRoot implements IStoryItem { }
TreeItem<IStoryItem> rootItem;
#FXML
public void initialize() {
StoryRoot storyRoot = new StoryRoot();
rootItem = new TreeItem<>(storyRoot);
tv.setRoot(rootItem);
// For Drag and Drop:
// - rootItem can only accept Story nodes.
// - Story nodes can only accept Part nodes.
// - Part nodes can't accept any other nodes.
tv.setCellFactory(new Callback<TreeView<IStoryItem>, TreeCell<IStoryItem>>() {
#Override
public TreeCell<IStoryItem> call(TreeView<IStoryItem> siTreeView) {
TreeCell<IStoryItem> cell = new TreeCell<IStoryItem>() {
#Override
protected void updateItem(IStoryItem item, boolean empty) {
super.updateItem(item, empty);
if (item != null) { setText(item.toString()); }
}
};
// The following calls are as outlined in:
// https://docs.oracle.com/javase/8/javafx/events-tutorial/drag-drop.htm#CHDJFJDH
cell.setOnDragDetected((MouseEvent event) -> {
// Don't drag Story nodes.
if (cell.getItem() instanceof Story) return;
// drag was detected, start a drag-and-drop gesture
// allow Move transfer mode only
Dragboard db = cell.startDragAndDrop(TransferMode.MOVE);
// Put the Part on the dragboard
// From: https://stackoverflow.com/a/30916660/780350
ClipboardContent content = new ClipboardContent();
content.put(objectDataFormat, cell.getItem());
db.setContent(content);
event.consume();
});
cell.setOnDragDropped((DragEvent event) -> {
try {
Dragboard db = event.getDragboard();
boolean success = false;
if (db.hasContent(objectDataFormat)) {
Part droppedPart = (Part)db.getContent(objectDataFormat);
IStoryItem targetStoryItem = cell.getItem();
// Question: How to handle drops between leaf items or
// before the initial leaf or after the final leaf.
if (targetStoryItem instanceof Story) {
Story story = (Story) targetStoryItem;
updateStoryWith(droppedPart, story);
addPartTo(cell.getTreeItem(), droppedPart);
success = true;
}
}
event.setDropCompleted(success);
event.consume();
} catch (Exception e) {
System.out.println(e.getMessage());
}
});
cell.setOnDragDone((DragEvent event) -> {
/*
* the drag and drop gesture ended
* if the data was successfully moved, clear it
*/
if (event.getTransferMode() == TransferMode.MOVE) {
// TODO: remove the part that got moved.
IStoryItem item = cell.getItem();
TreeItem<IStoryItem> ti = cell.getTreeItem();
TreeItem<IStoryItem> pti = ti.getParent();
pti.getChildren().remove(ti);
IStoryItem psi = pti.getValue();
boolean removed = removePartFrom(psi, item);
}
event.consume();
});
return cell;
};
});
tv.getSelectionModel()
.selectedItemProperty()
.addListener((observable, oldValue, newValue) -> inspectObject(newValue.getValue()));;
Story[] stories = Utils.createStories();
for (Story s: stories) {
addStoryToTree(s);
}
}
private void updateStoryWith(Part droppedPart, Story story) {
List<Part> partsList = new ArrayList<>(Arrays.asList(story.parts));
partsList.add(droppedPart);
Part [] newParts = (Part[])partsList.toArray(new Part[partsList.size()]);
int idx = 1;
for (Part part : newParts) {
part.partnumber = idx++;
}
story.parts = newParts;
}
private void inspectObject(Object o) {
if (!(o instanceof IStoryItem)) {
System.out.println(o.getClass().toString());
} else if (o instanceof Story) {
Story s = (Story)o;
System.out.println("Story: " + s.toString());
} else if (o instanceof Part) {
Part s = (Part)o;
System.out.println("Part: " + s.toString());
}
}
void addStoryToTree(Story story) {
if (story.parts.length == 0) return;
TreeItem<IStoryItem> item = new TreeItem<>(story);
rootItem.getChildren().add(item);
for (Part part : story.parts) {
addPartTo(item, part);
}
}
void addPartTo(TreeItem<IStoryItem> storyItem, Part part) {
TreeItem<IStoryItem> partItem = new TreeItem<>(part);
storyItem.getChildren().add(partItem);
}
boolean removePartFrom(IStoryItem si, IStoryItem pi) {
if (!(si instanceof Story)) return false;
if (!(pi instanceof Part)) return false;
Story story = (Story) si;
Part part = (Part) pi;
List<Part> plist = new LinkedList<>(Arrays.asList(story.parts));
if (!plist.contains(part)) return false;
boolean removed = plist.remove(part);
story.parts = plist.toArray(new Part[plist.size()]);
return removed;
}
}
I currently have two tableviews in one screen, which results in both TableViews have rows which the user can select.
Now I want only one row to be selected at the same time (doesn't matter which TableView it is selected from). I was thinking about some kind of listener which deselects the other row when a row is selected. This is my initial setup:
Step 1
Search for a way to bind a method to the selection of a row (there is not something like tableview.setOnRowSelected(method))
Step 2
Create the method which acts like a kind of listener: when a row is selected, deselect the other row (I know how to do this part)
Class1 selectedObject1 = (Class1)tableview1.getSelectionModel().getSelectedItem();
Class2 selectedObject2 = (Class2)tableview2.getSelectionModel().getSelectedItem();
if(selectedObject1 != null && selectedObject2 != null) {
tableview1.getSelectionModel().clearSelection();
}
So, step one is the problem. I was thinking of an observable list on which a listener can be created, and then add the selected row to the list. When this happens, the listener can call the method.
Anyone any clue how to make this?
Any help is greatly appreciated.
The selectedItem in the selection model is an observable property, so you should be able to achieve this with:
tableview1.getSelectionModel().selectedItemProperty().addListener((obs, oldSelection, newSelection) -> {
if (newSelection != null) {
tableview2.getSelectionModel().clearSelection();
}
});
tableview2.getSelectionModel().selectedItemProperty().addListener((obs, oldSelection, newSelection) -> {
if (newSelection != null) {
tableview1.getSelectionModel().clearSelection();
}
});
My solution would be creating custom cell factory for table and set it for each table columns.
Callback<TableColumn<..., ...>, TableCell<..., ...>> value = param -> {
TextFieldTableCell cell = new TextFieldTableCell<>();
cell.addEventFilter(MouseEvent.MOUSE_CLICKED, event -> {
//your code
}
);
return cell;
};
packageName.setCellFactory(value);
table1.column1.setCellFactory();
table2.column1.setCellFactory();
...
I use it for deleting the chosen row.
public void ButtonClicked()
{
ObservableList<Names> row , allRows;
allRows = table.getItems();
row = table.getSelectionModel().getSelectedItems();
row.forEach(allRows::remove);
}
This question helped me but during experiment in javafx and jfoenix this also works for me.
deleteSingle.addEventHandler(MouseEvent.MOUSE_CLICKED, (e) -> {
StringProperty selectedItem = table.getSelectionModel().getSelectedItem().getValue().link1;
System.out.println("That is selected item : "+selectedItem);
if (selectedItem.equals(null)) {
System.out.println(" No item selected");
} else {
System.out.println("Index to be deleted:" + selectedItem.getValue());
//Here was my database data retrieving and selectd
// item deleted and then table refresh
table.refresh();
return;
}
});
In case you need not only the row, but the x|y position of the table cell, do this:
table.getFocusModel().focusedCellProperty().addListener(
new ChangeListener<TablePosition>() {
#Override
public void changed(ObservableValue<? extends TablePosition> observable,
TablePosition oldPos, TablePosition pos) {
int row = pos.getRow();
int column = pos.getColumn();
String selectedValue = "";
if (table.getItems().size() > row
&& table.getItems().get(row).size() > column) {
selectedValue = table.getItems().get(row).get(column);
}
label.setText(selectedValue);
}
});
In this example, I am using a "classic" TableView with List<String> as column model. And, of course, that label is just an example from my code.