GXT Drag and drop from tree label to a widget - java

I just want to drag and drop an label from tree to a widget. I am using the below code and it is not getting dropped as a widget. Can you please help me how to display a widget as a dropped item.
final FlowLayoutContainer dropContainer = new FlowLayoutContainer();
dropContainer.setBorders(true);
DropTarget target = new DropTarget(dropContainer) {
#Override
protected void onDragDrop(DndDropEvent event) {
super.onDragDrop(event);
Widget window = (Widget) event.getData();
dropContainer.add(window);
}
};
target.setGroup("test");
target.setOverStyle("drag-ok");

Instead of creating widget, you can instantiate new window like below and set the properties of it.
final FlowLayoutContainer dropContainer = new FlowLayoutContainer();
dropContainer.setBorders(true);
DropTarget target = new DropTarget(dropContainer) {
#Override
protected void onDragDrop(DndDropEvent event) {
super.onDragDrop(event);
Window window = new Window();
window.setClosable(true);
window.setHeight(200);
window.setWidth(200);
};
target.setGroup("test");
target.setOverStyle("drag-ok");
}

Related

Jxmaps How can I add a ContextMenu to a Marker?

I've been trying to add a contextmenu to a marker, but I can't figure out how to get the contextmenu to appear.
marker.addEventListener("rightclick", new MapMouseEvent() {
#Override
public void onEvent(MouseEvent event) {
contextMenu.show(
marker, marker.getPosition().getLat(),
marker.getPosition().getLng()
);
}
});
I tried to cast marker as Node, but that didn't work, help?
To display a popup menu on JxMaps you have to do the next actions:
Switch JxMaps to the LIGHTWEIGHT mode (). In the HEAVYWEIGHT mode, the popup menu can be displayed under the map.
Add the code that shows the PopupMenu to "click" the event handler.
Please take a look at the following example:
JPopupMenu popup = new JPopupMenu();
popup.add(new JMenuItem("Test"));
MapView mapView = new MapView(new MapViewOptions(MapComponentType.LIGHTWEIGHT));
mapView.setOnMapReadyHandler(new MapReadyHandler() {
#Override
public void onMapReady(MapStatus status) {
final Map map = mapView.getMap();
map.setCenter(new LatLng(35.91466, 10.312499));
map.setZoom(2.0);
map.addEventListener("rightclick", new MapEvent() {
#Override
public void onEvent() {
java.awt.Point pos = MouseInfo.getPointerInfo().getLocation();
SwingUtilities.convertPointFromScreen(pos, mapView);
popup.show(mapView, pos.x, pos.y);
}
});
}
});

GWT depending on browser scroll bar or dynamic resizing of callTable did not work

Iteresiting case which make my work a nightmare in GWT. I try to add to my panel tab with dynamic changed table to add some params by user. Requirements are dynamic adding new elements and that user can overview all of them and eventually correct it.
I create all that with callTable but in one browser (Chromium or Opera) I can add new elements but in the same time on the same package in mozzila I see scroll bar but canot add dynamically new elements, but if I erase some preloaded one new one appears. Can someone explain to me what exactly goes wrong as it is one package run in incognito mode with erased history and cookies after every session
Maybe screen will be helpfull- param fill added dynamically:
view with new element 1
table with scrool bar but without option of adding new element 2
And source code:
//initial layout and component
final VLayout customLayout = new VLayout();
Canvas customComponent = new Canvas();
//dataprovider modal creation with in memory list
final ListDataProvider<String> model = new ListDataProvider<>(
getProvisioningParameterList());
final CellTable<String> table = new CellTable<>();
// create column with data
Column<String, String> nameColumn = new Column<String, String>(new EditTextCell()) {
#Override
public String getValue(String object) {
return object;
}
};
//column with delete button
Column<String, String> deleteBtn = new Column<String, String>(
new ButtonCell()) {
#Override
public String getValue(String object) {
return "x";
}
};
// add column to the table
table.addColumn(nameColumn, "Custom parameters");
table.addColumn(deleteBtn, "Click to delete row");
//initialize table row size
table.setWidth("100%");
// Set the field updater, whenever user clicks on button row will be removed.
deleteBtn.setFieldUpdater(new FieldUpdater<String, String>() {
#Override
public void update(int index, String object, String value) {
model.getList().remove(object);
model.refresh();
table.redraw();
}
});
// add a data display to the table which is adapter.
model.addDataDisplay(table);
//add Button
final IButton addButton = new IButton("Add");
addButton.setIcon("icons/add.png");
addButton.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
model.getList().add("fill");
model.refresh();
table.redraw();
}
});
//add custom config panel with proper view
ScrollPanel sp = new ScrollPanel();
sp.setAlwaysShowScrollBars(true);
customComponent.setContents("Params");
customComponent.setAutoHeight();
customLayout.setMargin(15);
customLayout.addMember(customComponent);
customLayout.addMember(addButton, 1);
customLayout.addMember(saveButton, 2);
customLayout.addMember(table);
If someone will still wonder about it I got a solution. I forgot to add ScrollPanel to layout. Edit Additionally I put table into scrollPanel in specific dimentions and that two element structure to main VLayout. Now it works as expected :)

Eclipse Plugin: Opening dialogs alongside quickfix

I'm working on a plugin and am trying to add some additional information around the quickfix menu that is triggered by clicking on my custom markers.
I'm adding a method call in MarkerResolutionGenerator.getResolutions() to draw the new dialog window, but I'm having trouble getting it to agree with the quickfix dialog. I can get it to draw at the same time, but I can't control the position and it also draws an extra blank dialog in the background.
Any thoughts? Relevant code below. The first two methods are from my MarkerResolutionGenerator, and my custom class is below that. (I just copied it from an example, I'm more worried about getting it to behave before I work on the content.)
#Override
public IMarkerResolution[] getResolutions(IMarker marker)
{
IMarker problem = marker;
makeStuff();
...
}
private void makeStuff()
{
Display display = Activator.getDefault().getWorkbench().getDisplay();
Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor()
.getSite().getWorkbenchWindow().getShell();
Shell myShell = new Shell(shell, SWT.NO_TRIM);
MyDialog md = new MyDialog(myShell);
md.open();
}
public class MyDialog extends Dialog
{
public MyDialog(Shell parentShell)
{
super(parentShell);
setShellStyle(SWT.CLOSE | SWT.MODELESS | SWT.BORDER | SWT.TITLE);
setBlockOnOpen(false);
}
#Override
protected Control createDialogArea(Composite parent)
{
Composite container = (Composite) super.createDialogArea(parent);
Button button = new Button(container, SWT.PUSH);
button.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
button.setText("Press me");
button.addSelectionListener(new SelectionAdapter() {
#Override
public void widgetSelected(SelectionEvent e) {
System.out.println("Pressed");
}
});
return container;
}
...
}
Do you really need to create another Shell? Why not just use the one you already have as parent for your dialog? It might be the reason for the "extra blank dialog in the background".
You should be able to set the initial position overriding getInitialLocation in your custom dialog:
#Override
protected Point getInitialLocation(Point initialSize) {
return new Point(10, 10); // x and y coordinates of the initial position
}

gwt widget that contain another widget: 2 different clickhandlers

I'm studying the GWT framework and I'm trying to create a custom widget: this widget is a button that contain inside a menu of operations.
if you click in the area of the triangle I want a menu with some options (that are possible operations) and if I click in the other parts of the buttons I want that the operation is the first from the list.
I have put a ListBox widget inside a Button widget and I want 2 different clickListener. The problem is that the listener of the listBox inside the button don't work.
Do you know why?
Following the code
public class MyClass extends Composite {
private ListBox options;
private Button saveButton;
private HorizontalPanel savePanel;
private int indexHandler;
public MyClass(String label, List<String> operationList, final List<Command> commandList) {
savePanel = new HorizontalPanel();
initWidget(savePanel);
options = new ListBox();
saveButton = new Button(label);
for(String operation : operationList){
options.addItem(operation);
}
options.sinkEvents(Event.ONCLICK);
options.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
System.out.println("Test1");
indexHandler = options.getSelectedIndex();
commandList.get(indexHandler).execute();
options.setItemSelected(0, true);
}
});
saveButton.getElement().appendChild(options.getElement());
saveButton.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
System.out.println("Test2");
commandList.get(0).execute();
options.setItemSelected(0, true);
}
});
savePanel.add(saveButton);
}
}
Don't use ClickHandler on the ListBox. Use ChangeHandler instead.
Also, I don't think you need to mess with Elements here. Simply add your Button widget and your ListBox widget to a container (i.e. some panel). You can add button on top of ListBox, if you want.

Stopping JPopupMenu stealing the focus

I have a JTextField for which I'm hoping to suggest results to match the user's input. I'm displaying these suggestions in a JList contained within a JPopupMenu.
However, when opening the popup menu programmatically via show(Component invoker, int x, int y), the focus is getting taken from the JTextField.
Strangely enough, if I call setVisible(true) instead, the focus is not stolen; but then the JPopupMenu is not attached to any panel, and when minimizing the application whilst the box is open, it stays painted on the window.
I've also tried to reset the focus to the JTextField using requestFocus(), but then I have to restore the caret position using SwingUtilities.invokeLater(), and the invoke later side of things is giving the user a slight margin to mess around with the existing contents / overwrite it / or do other unpredictable things.
The code I've got is effectively:
JTextField field = new JTextField();
JPopupMenu menu = new JPopupMenu();
field.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
JList list = getAListOfResults();
menu.add(list);
menu.show(field, 0, field.getHeight());
}
});
Can anyone suggest the best avenue to go down to show the JPopupMenu programmatically whilst preserving the focus on the JTextField?
The technical answer is to set the popup's focusable property to false:
popup.setFocusable(false);
The implication is that the textField has to take over all keyboard and mouse-triggered actions that are normally handled by the list itself, sosmething like:
final JList list = new JList(Locale.getAvailableLocales());
final JPopupMenu popup = new JPopupMenu();
popup.add(new JScrollPane(list));
popup.setFocusable(false);
final JTextField field = new JTextField(20);
Action down = new AbstractAction("nextElement") {
#Override
public void actionPerformed(ActionEvent e) {
int next = Math.min(list.getSelectedIndex() + 1,
list.getModel().getSize() - 1);
list.setSelectedIndex(next);
list.ensureIndexIsVisible(next);
}
};
field.getActionMap().put("nextElement", down);
field.getInputMap().put(
KeyStroke.getKeyStroke("DOWN"), "nextElement");
As your context is very similar to a JComboBox, you might consider having a look into the sources of BasicComboBoxUI and BasicComboPopup.
Edit
Just for fun, the following is not answering the focus question :-) Instead, it demonstrates how to use a sortable/filterable JXList to show only the options in the dropdown which correspond to the typed text (here with a starts-with rule)
// instantiate a sortable JXList
final JXList list = new JXList(Locale.getAvailableLocales(), true);
list.setSortOrder(SortOrder.ASCENDING);
final JPopupMenu popup = new JPopupMenu();
popup.add(new JScrollPane(list));
popup.setFocusable(false);
final JTextField field = new JTextField(20);
// instantiate a PatternModel to map text --> pattern
final PatternModel model = new PatternModel();
model.setMatchRule(PatternModel.MATCH_RULE_STARTSWITH);
// listener which to update the list's RowFilter on changes to the model's pattern property
PropertyChangeListener modelListener = new PropertyChangeListener() {
#Override
public void propertyChange(PropertyChangeEvent evt) {
if ("pattern".equals(evt.getPropertyName())) {
updateFilter((Pattern) evt.getNewValue());
}
}
private void updateFilter(Pattern newValue) {
RowFilter<Object, Integer> filter = null;
if (newValue != null) {
filter = RowFilters.regexFilter(newValue);
}
list.setRowFilter(filter);
}
};
model.addPropertyChangeListener(modelListener);
// DocumentListener to update the model's rawtext property on changes to the field
DocumentListener documentListener = new DocumentListener() {
#Override
public void removeUpdate(DocumentEvent e) {
updateAfterDocumentChange();
}
#Override
public void insertUpdate(DocumentEvent e) {
updateAfterDocumentChange();
}
private void updateAfterDocumentChange() {
if (!popup.isVisible()) {
popup.show(field, 0, field.getHeight());
}
model.setRawText(field.getText());
}
#Override
public void changedUpdate(DocumentEvent e) {
}
};
field.getDocument().addDocumentListener(documentListener);
It looks straight forward to me. Add the following
field.requestFocus();
after
menu.add(list);
menu.show(field, 0, field.getHeight());
Of course, you will have to code for when to hide the popup etc based on what is going on with the JTextField.
i.e;
menu.show(field, field.getX(), field.getY()+field.getHeight());
menu.setVisible(true);
field.requestFocus();
You may take a look to JXSearchField, which is part of xswingx

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