I would like to add a vertex in a JGraphX at a position indicated by the user just by right click on the mouse
How can I possibly achieve that
Thank you in advance for your help
You can do it like so:
graph.getGraphComponent().getGraphControl().addMouseListener(...)
And then insert the vertex when the user clicks:
#Override
public void mouseReleased(MouseEvent e) {
if (e.isPopupTrigger()) {
graph.getModel().beginUpdate();
try {
// this method is useful if you have a grid, zoom...
mxPoint mousePos = graph.getGraphComponent().getPointForEvent(e, false);
graph.insertVertex(graph.getDefaultParent(), null, "Hello", mousePos.getX(), mousePos.getY(), 80, 30);
} finally {
graph.getModel().endUpdate();
}
}
}
You can then check if cell is not null and is a vertex.
Related
I have a TableView with a ComboBoxTableCell, when using the default implementation the user have to click three times to select a value from of the ComboBox's list.
I want when the user clicks on the cell to show the combo box list. I based my solution on this one:
JavaFX editable ComboBox in a table view
The cell does get into edit mode (startEdit() is called) but it takes another click to show the list of values, what am I missing?
table.addEventHandler(MouseEvent.MOUSE_CLICKED, (e) ->
{
if (table.getEditingCell() == null)
{
TablePosition focusedCellPos = table.getFocusModel().getFocusedCell();
table.edit(focusedCellPos.getRow(), focusedCellPos.getTableColumn());
}
});
Thanks.
Interesting problem - bubbling up again after quite a while :)
Looks like the approach of the OP is indeed working (as of fx11, some bugs around its editing seem to be fixed) - with a little help from the combo cell:
start editing in a single click handler on the tableView (from OP)
extend ComboBoxTableCell and override its startEdit to open the dropDown
Code snippet:
// set editable to see the combo
table.setEditable(true);
// keep approach by OP
table.addEventHandler(MouseEvent.MOUSE_CLICKED, (e) -> {
TablePosition<Person, ?> focusedCellPos = table.getFocusModel()
.getFocusedCell();
if (table.getEditingCell() == null) {
table.edit(focusedCellPos.getRow(),
focusedCellPos.getTableColumn());
}
});
// use modified standard combo cell shows its popup on startEdit
firstName.setCellFactory(cb -> new ComboBoxTableCell<>(firstNames) {
#Override
public void startEdit() {
super.startEdit();
if (isEditing() && getGraphic() instanceof ComboBox) {
// needs focus for proper working of esc/enter
getGraphic().requestFocus();
((ComboBox<?>) getGraphic()).show();
}
}
});
Maybe not the cleanest solution to this problem, but I found a workaround to make the ComboBoxTableCells drop down its menu in just 1 click:
column.setCellFactory(new Callback<TableColumn<Person, String>, TableCell<Person, String>>() {
#Override
public TableCell<Person, String> call(TableColumn<Person, String> column) {
ComboBoxTableCell cbtCell = new ComboBoxTableCell<>(cbValues);
cbtCell.setOnMouseEntered(new EventHandler<Event>() {
#Override
public void handle(Event event) {
// Without a Person object, a combobox shouldn't open in that row
if (((Person)((TableRow)cbtCell.getParent()).getItem()) != null) {
Robot r = new Robot();
r.mouseClick(MouseButton.PRIMARY);
r.mouseClick(MouseButton.PRIMARY);
}
}
});
return cbtCell;
}
});
PS: I know that this topic is a bit old, but I also stumbled upon this problem recently and could not find any working solution to it online. As I sad, it's not the cleanest workaround, but at least it does its job. ;)
I have to retrieve some data from my database to dynamically create a TreeView and select some CheckBoxTreeItems from this TreeView. This TreeView represents permissions to a menu structure.
My doubt is when I create the TreeView and select specific items from the Tree according to the user's permissions programmatically, the parents items don't have any status change (selected or indeterminate). But when I select any item directly from the interface, the parents get updated.
For example, here I have my screen when I select the items programmatically:
You can see that I have two menu items selected, but the parents aren't.
On this image, I have selected the same menu items using the screen, and the parents were updated with indeterminate status or selected if I select all children inside the submenu.
I have gone through the documentation, google and here on Stack Overflow, but only found examples to update the children.
Is there a way to update the parents programmatically or to call the event executed from the screen when an item is selected?
EDIT:
All items from the Tree have the independent property set to false.
I came with a workaround for this problem.
I had to first create all the TreeView structure, and change the selected property after using this code snippet:
Platform.runLater(new Runnable() {
#Override
public void run() {
selectItems();
}
});
Here is the code to verify the TreeItems:
private void selectItems(){
TreeItem root = tree.getRoot();
if (root != null) {
selectChildren(root);
}
}
private void selectChildren(TreeItem<TesteVO> root){
for(TreeItem<TesteVO> child: root.getChildren()){
// HERE I CHECK IF THE USER HAS PERMISSION FOR THE MENU ITEM
// IF SO, I CHANGE THE SELECTED PROPERTY TO TRUE
if (child.getValue().id == 4) {
((CheckBoxTreeItem) child).setSelected(true);
}
// IF THERE ARE CHILD NODES, KEEP DIGGING RECURSIVELY
if(!child.getChildren().isEmpty()) {
selectChildren(child);
}
}
}
If there is a simpler way, please let me know!
This is not the case. Parent items do get automatically get set to the indeterminate state when you select a child item. I'm not sure if this is something that got corrected from the time that this question was posted, probably not.
My guess is that there's a programming bug in how the node was selected or how the TableView was constructed and initialized.
Here's some code that shows what I'm doing, and it works! In my case, I'm using a CheckBoxTreeItem<File> for the TreeItem.
How the treeview was created
treeView = new TreeView(root);
treeView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
#Override
public void changed(ObservableValue observableValue, Object o, Object t1) {
CheckBoxTreeItem<File> node = (CheckBoxTreeItem<File>)t1;
if (node.getValue() != currentFile) {
setFileDetail(node);
showChildren(node);
}
}
});
treeView.setCellFactory(new CallBackWrapper());
treeView.setShowRoot(false);
Below show the CallBackWrapper class.
private class CallBackWrapper implements Callback<TreeView<File>, TreeCell<File>> {
Callback<TreeView<File>, TreeCell<File>> theCallback;
private CallBackWrapper() {
theCallback = CheckBoxTreeCell.<File>forTreeView(getSelectedProperty, converter);
}
#Override
public TreeCell<File> call(TreeView<File> fileTreeView) {
return theCallback.call(fileTreeView);
}
final Callback<TreeItem<File>, ObservableValue<Boolean>> getSelectedProperty = (TreeItem<File> item) -> {
if (item instanceof CheckBoxTreeItem<?>) {
return ((CheckBoxTreeItem<?>) item).selectedProperty();
}
return null;
};
final StringConverter<TreeItem<File>> converter = new StringConverter<TreeItem<File>>() {
#Override
public String toString(TreeItem<File> object) {
File item = object.getValue();
return fileSystemView.getSystemDisplayName(item);
}
#Override
public TreeItem<File> fromString(String string) {
return new TreeItem<File>(new File(string));
}
};
}
And lastly here some code that the selection was made in:
boolean selectNode(CheckBoxTreeItem<File> parentNode, String name) {
Object[] children = parentNode.getChildren().toArray();
for (Object child : children) {
CheckBoxTreeItem<File> childItem = (CheckBoxTreeItem<File>) child;
if (name.equals(childItem.getValue().getName())) {
childItem.setSelected(true);
//treeView.getSelectionModel().select(child); <-- this does not work!
return true;
}
}
return false;
}
I am working on a javafx Minesweeper game, and currently am only using left mouse button input. I would like to use the right mouse button also so users can flag possible bombs. I looked at the Oracle webpage for Button class, and it says:
"When a button is pressed and released a ActionEvent is sent. Your application can perform some action based on this event by implementing an EventHandler to process the ActionEvent. Buttons can also respond to mouse events by implementing an EventHandler to process the MouseEvent."
https://docs.oracle.com/javafx/2/api/javafx/scene/control/Button.html
Ive tried this several different ways, with no success.
Included is my current EventHandler code. If anyone can explain the best way to handle right/left mouse clicks, or point me in the right direction of where to find that information, it is greatly appreciated.
MineButton is a custom class that extends Button. I would like on right click to mark as "m" and change cell color, and left click would remain the same.
for (int row = 0; row < 8; row++){
for (int col = 0; col <8; col++){
MineButton button = new MineButton(row, col);
button.setPrefSize(100, 100);
button.setText("?");
button.setStyle("-fx-font: 22 arial; -fx-base:#dcdcdc;");
button.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
if ( button.isAMine() == true){
button.setText("B");
for( int row1 = 0; row1 < 8; row1++){
for ( int col1 = 0; col1 < 8; col1++){
if (mineButtons[row1][col1].isAMine() == true){
mineButtons[row1][col1].setText("B");
mineButtons[row1][col1].setStyle("-fx- font: 22 arial; -fx-base: #dc143c;");
}
}
}
}
else{
recursion(mineButtons, button.getX(), button.getY());
}
}
});
You cannot handle right clicks on a button by attaching an event handler on action event. Instead you need to add a handler to the mouse event:
button.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent mouseEvent) {
if(mouseEvent.getButton().equals(MouseButton.SECONDARY)){
System.out.println("Set flag on the button");
}
}
});
If u wanna handle the MouseEvent use this code. It will work.
button.addEventFilter(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
if(event.getButton() == MouseButton.SECONDARY){
// Type code to set flag here
}
}
});
scene.setOnMousePressed(event ->{
if(event.getButton() == MouseButton.PRIMARY) {
anchorX = event.getSceneX();
anchorY = event.getSceneY();
anchorAngleX = angleX.get();
anchorAngleY = angleY.get();
}
});
scene.setOnMouseDragged((MouseEvent event) -> {
if(event.getButton() == MouseButton.PRIMARY) {
angleX.set(anchorAngleX - (anchorY - event.getSceneY()));
angleY.set(anchorAngleY - (anchorX - event.getSceneX()));
}
});
This code rotates a JavaFX group in a scene with a left mouse button and a drag. You can print the event.getButton to make certain your primary and secondary are working. I have tried many other ways including JavaFXtras. This is by far the simplest way to handle the primary and secondary mouse click events.
I have a TextField where the user can type. I would like to show a ContextMenu below cursor when the user hit Ctrl+Space key combination.
codeArea.setOnKeyPressed(event -> {
if( event.getCode().equals( KeyCode.SPACE ) && event.isControlDown() ) {
int cursorX = ?;
int cursorY = ?;
cm.show(codeArea, x, y);
} else {
cm.hide();
}
});
How I get the cursor current position? I must give it's (screen) XY coords to the show() function.
I'd like use it for auto completion.
Thanks.
Add a MouseListener and save the last position in a Variable :)
You might wanna use getScreenX() and getScreenY() not sure of the difference at the moment.
codeArea.setOnMouseMoved(new EventHandler<MouseEvent>() {
#Override public void handle(MouseEvent event) {
this.cursorX = event.getX();
this.cursorY = event.getY();
}
});
Good evening,
I ask myself the following head breaks:
I would like to create a Favorites button that has the two following states:
1st state: "Add to Favorites"
2nd state (on OnClick event): "Remove from favorites"
But I'd also be able to return to the 2nd state: "Add to Favorites" by a 2nd OnClick event ect..
Does anyone have a solution for it with a simple OnClickListener it seems impossible.
I finally solved my problem using a custom checkbox !!Is the best way to use favorite things because you can get the state of your drawable !!
like that :
favoris_button = (CheckBox) findViewById(R.id.star);
favoris_button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (((CheckBox) v).isChecked()) {
favoris_button.setText("Supprimer des categories");
}
else
favoris_button.setText("Ajouter aux favoris");
}
});
Run this code inside your listener or wrap a function around it and pass it the boolean and call it when you need to. Startup, reset or whenever you want to change the state. If the button is clicked you need to flip the state.
private Boolean check;
favoris_button = (Button) findViewById(R.id.promotion_favoris);
favoris_button.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
if (check == true)
{
favoris_button.setBackgroundColor(R.drawable.btn_orange9);
favoris_button.setText("Supprimer des favoris");
}
else
{
favoris_button.setBackgroundColor(R.drawable.btn_red9);
favoris_button.setText("Ajouter aux favoris");
}
check ^= true;
}
});