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Switching view from gluon CharmListView works on Desktop but not in Android

So I have been working on a project and I have a CharmListView that populates with the name of the task to be used. I can login through my login screen, get to the CharmListView and click on the task I want to have open. It opens on the Desktop when I am testing it, but in Android it fails, saying the location is not found, and that:
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.gluonhq.charm.glisten.mvc.View.setName(java.lang.String)' on a null object reference
Here are my charm classes that I have:
This one is the task model essentially.
public class CharmHomeNavTask {
private String taskName;
private String taskDesc;
private static final Image IMAGE_ADMIN = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/admin.png"));
private static final Image IMAGE_AUDIT_TOOL = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/auditTool.png"));
private static final Image IMAGE_CONSOLIDATE_PACKAGE = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/consolidatePackage.png"));
private static final Image IMAGE_DISPOSAL = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/disposal.png"));
private static final Image IMAGE_EQUIP_MANGAGE = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/equipmentManagement.png"));
private static final Image IMAGE_INTRA_TRANSFER = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/intratransfer.png"));
private static final Image IMAGE_PICKUP = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/pickup.png"));
private static final Image IMAGE_TRU_WASTE_PREP = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/truWastePrep.png"));
private static final Image IMAGE_VISUAL_INSPECTION = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/visualInspection.png"));
private static final Image IMAGE_WALL2WALL = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/wall2wall.png"));
private static final Image IMAGE_WASTE_ID = new Image(WcatsAndroidDemo.class.getResourceAsStream("/gov/lanl/taskImages/wasteIdentification.png"));
private static Image[] listOfImages = {IMAGE_WASTE_ID, IMAGE_VISUAL_INSPECTION, IMAGE_TRU_WASTE_PREP, IMAGE_CONSOLIDATE_PACKAGE, IMAGE_INTRA_TRANSFER, IMAGE_PICKUP, IMAGE_DISPOSAL, IMAGE_ADMIN, IMAGE_WALL2WALL,
IMAGE_EQUIP_MANGAGE, IMAGE_AUDIT_TOOL };
public CharmHomeNavTask(String taskName, String taskDesc){
this.taskName = taskName;
this.taskDesc = taskDesc;
}
public String getTaskName() {
return taskName;
}
public void setTaskName(String taskName) {
this.taskName = taskName;
}
public String getTaskDesc() {
return taskDesc;
}
public void setTaskDesc(String taskDesc) {
this.taskDesc = taskDesc;
}
public static void setListOfImages(Image[] listOfImages) {
listOfImages = listOfImages;
}
public static Image[] getListOfImages(){
return listOfImages;
}
public static Image getSingleImageFromList(int index){
return listOfImages[index];
}
}
This one is the creation of the tasks into an ObservableList
public class CharmHomeNavTasks {
public static ObservableList<CharmHomeNavTask> tasksList = FXCollections.observableArrayList(
new CharmHomeNavTask("Waste Identification", "Identify you waste from this screen."),
new CharmHomeNavTask("TRU Visual Inspection", "Visual Inspection of TRU waste."),
new CharmHomeNavTask("TRU Drum Preparation", "Prepare your TRU drums here."),
new CharmHomeNavTask("Consolidation/Packaging", "Consolidate and package your waste."),
new CharmHomeNavTask("Intra-Facility Transfer", "Transferring of waste within the same facility."),
new CharmHomeNavTask("Inter-Facility Pickup", "Picking up waste within the same facility."),
new CharmHomeNavTask("Disposal Tasks", "Disposal of waste tasks."),
new CharmHomeNavTask("Administrative Tasks", "Administrators have special tasks they can perform here."),
new CharmHomeNavTask("Wall-Wall Inventory", "Wall to Wall inventory tasks."),
new CharmHomeNavTask("Equipment Management", "Waste related equipment tasks."),
new CharmHomeNavTask("Audit Support Tool", "Tool for audit related tasks."));
public static ObservableList<CharmHomeNavTask> getTasksList() {
return tasksList;
}
}
This is the one that is giving me trouble because I have my onMouseClicked event here and I set the item(or task) to selected. This seems to work fine even on Android as I can the the system to tell me which item was clicked.
public class CharmHomeNavTaskCell extends CharmListCell<CharmHomeNavTask> {
private final ListTile tile;
private final ImageView imageView;
private CharmHomeNavTask item;
public CharmHomeNavTask carryOverItem;
public CharmHomeNavTaskCell(CharmListView listView){
tile = new ListTile();
imageView = new ImageView();
tile.setPrimaryGraphic(imageView);
carryOverItem = item;
tile.setOnMouseClicked(e -> {
System.out.println("******************* Item clicked " + item.getTaskName());
listView.setSelectedItem(item);
});
setText(null);
}
#Override
public void updateItem(CharmHomeNavTask item, boolean empty){
super.updateItem(item, empty);
this.item = item;
imageView.setFitWidth(32);
imageView.setFitHeight(32);
if (item != null && !empty) {
tile.textProperty().setAll(item.getTaskName() + " ", item.getTaskDesc());
tile.setWrapText(true);
final Image[] image = CharmHomeNavTask.getListOfImages();
super.setStyle("-fx-font-weight: bold");
switch (item.getTaskName()) {
case "Waste Identification":
imageView.setImage(image[0]);
break;
case "TRU Visual Inspection":
imageView.setImage(image[1]);
break;
case "TRU Drum Preparation":
imageView.setImage(image[2]);
break;
case "Consolidation/Packaging":
imageView.setImage(image[3]);
break;
case "Intra-Facility Transfer":
imageView.setImage(image[4]);
break;
case "Inter-Facility Pickup":
imageView.setImage(image[5]);
break;
case "Disposal Tasks":
imageView.setImage(image[6]);
break;
case "Administrative Tasks":
imageView.setImage(image[7]);
break;
case "Wall-Wall Inventory":
imageView.setImage(image[8]);
break;
case "Equipment Management":
imageView.setImage(image[9]);
break;
case "Audit Support Tool":
imageView.setImage(image[10]);
break;
}
setGraphic(tile);
} else {
setGraphic(null);
}
}
}
Here is the AppViewManager Class. I am using Glisten and Afterburner just so that you know.
public class AppViewManager {
private static String getLoggedInUser(User user){
if (user != null) {
return user.getId();
} else {
return "Not Logged In";
}
}
public static final AppViewRegistry REGISTRY = new AppViewRegistry();
public static final AppView PRIMARY_VIEW = view("Home", PrimaryPresenter.class, MaterialDesignIcon.HOME, SHOW_IN_DRAWER, HOME_VIEW);
public static final AppView SECONDARY_VIEW = view("Task List", SecondaryPresenter.class, MaterialDesignIcon.LIST, SHOW_IN_DRAWER);
public static final AppView SETTINGS_VIEW = view("Settings", SettingsView.class, MaterialDesignIcon.SETTINGS_APPLICATIONS, SHOW_IN_DRAWER);
public static final AppView INTRAFACILITYTRANSFER_VIEW = view("Intra-Facility Transfer", IntraFacilityView.class, MaterialDesignIcon.EDIT_LOCATION);
private static AppView view(String title, Class<? extends GluonPresenter<?>> presenterClass, MaterialDesignIcon menuIcon, AppView.Flag... flags ) {
return REGISTRY.createView(name(presenterClass), title, presenterClass, menuIcon, flags);
}
private static String name(Class<? extends GluonPresenter<?>> presenterClass) {
return presenterClass.getSimpleName().toUpperCase(Locale.ROOT).replace("PRESENTER", "");
}
public static void registerViewsAndDrawer(MobileApplication app) {
for (AppView view : REGISTRY.getViews()) {
view.registerView(app);
}
Image image = new Image(WcatsAndroidDemo.class.getResourceAsStream("/icon.png"));
NavigationDrawer.Header header = new NavigationDrawer.Header("\nWCATS" + "- " + getLoggedInUser(WcatsAndroidDemo.getInstance().getLoggedUser()),
"Waste Management System", new ImageView(image));
// TODO: Add a footer to the drawer that contains settings, help & feedback, and About
NavigationDrawer.Footer footer = new NavigationDrawer.Footer("No tasks currently need to be synchronized.", null);
//Create the sub items for the drawer
NavigationDrawer.Item about = new NavigationDrawer.Item("About", MaterialDesignIcon.INFO.graphic());
NavigationDrawer.Item logOut = new NavigationDrawer.Item("Logout", MaterialDesignIcon.EXIT_TO_APP.graphic());
// TODO: make the rest of the submenu items that go in the header.
DefaultDrawerManager drawerManager = new DefaultDrawerManager(app, header, REGISTRY.getViews()) {
{
NavigationDrawer drawer = getDrawer();
drawer.visibleProperty().addListener((observable, oldValue, newValue) -> {
if (newValue){
header.setTitle("\nWCATS - " + getLoggedInUser(WcatsAndroidDemo.getInstance().getLoggedUser()));
}
});
// Add items
drawer.setFooter(footer);
footer.setStyle("-fx-text-size: 6");
drawer.getItems().addAll(new Separator(), about, logOut, new Separator());
// TODO: provide action based on item selected
drawer.selectedItemProperty().addListener(((observable, oldValue, newValue) -> {
if(newValue.equals(about)) {
System.out.println("test");
} else if (newValue.equals(logOut)){
WcatsAndroidDemo.getInstance().userLogout();
} else if (newValue.equals(SECONDARY_VIEW.getMenuItem())){
if (getLoggedInUser(WcatsAndroidDemo.getInstance().getLoggedUser()).equals("Not Logged In")) {
AppViewManager.PRIMARY_VIEW.switchView();
} else {
AppViewManager.SECONDARY_VIEW.switchView();
}
}
} ));
}
};
drawerManager.installDrawer();
}
}
Lastly, here is the Presenter class for the view that I am navigation from and want to go to the task that is selected.
public class SecondaryPresenter extends GluonPresenter<WcatsAndroidDemo> {
#FXML
private View homeView;
#FXML
public CharmListView<CharmHomeNavTask, Integer> charmListView;
public void initialize() {
homeView.setShowTransitionFactory(BounceInRightTransition::new);
AppBar appBar = getApp().getAppBar();
homeView.showingProperty().addListener((observable, oldValue, newValue) -> {
appBar.setNavIcon(MaterialDesignIcon.MENU.button(e -> getApp().showLayer(DRAWER_LAYER)));
appBar.setTitleText("Task Selection");
});
charmListView.setFloatingHeaderVisible(false);
charmListView.setItems(CharmHomeNavTasks.getTasksList());
charmListView.setCellFactory(param -> new CharmHomeNavTaskCell(charmListView));
charmListView.selectedItemProperty().addListener((observable, oldValue, newValue) -> {
if (newValue.getTaskName().equals("Intra-Facility Transfer")){
AppViewManager.INTRAFACILITYTRANSFER_VIEW.switchView(ViewStackPolicy.SKIP);
}
});
}
}
Just in case you do need it to figure anything out here is the view that I am trying to navigate to.
public class IntraFacilityView extends GluonPresenter<WcatsAndroidDemo> {
#FXML
public ChoiceBox facilityCMBox;
#FXML
public ChoiceBox storageUnitOrgCMBox;
#FXML
public ChoiceBox storageUnitDestCMBox;
#FXML
public ChoiceBox gridXCMBox;
#FXML
public ChoiceBox gridYCMBox;
#FXML
public ChoiceBox gridZCMBox;
#FXML
public CheckBox organizeUnitCHKBox;
#FXML
public Button viewMoreReqsBTN;
#FXML
public Button viewPendingMovesBTN;
#FXML
public Button resumeTaskBTN;
#FXML
private View intrafacility;
public void initialize(){
intrafacility.setShowTransitionFactory(BounceInRightTransition::new);
intrafacility.showingProperty().addListener((observable, oldValue, newValue) -> {
if (newValue) {
AppBar appBar = getApp().getAppBar();
appBar.setNavIcon(MaterialDesignIcon.MENU.button(e -> {
getApp().showLayer(DRAWER_LAYER);
}));
appBar.setTitleText("Intra-Facility Transfer");
appBar.getActionItems().add(MaterialDesignIcon.CLOSE.button(e -> {
AppViewManager.SECONDARY_VIEW.switchView();
}));
}
});
}
public void handleOrganizeUnitsCHKBox(ActionEvent actionEvent) {
}
public void handleViewMoreReqs(ActionEvent actionEvent) {
}
public void handleResumeTask(ActionEvent actionEvent) {
}
public void handlevVewPendingMoves(ActionEvent actionEvent) {
}
}
I know that some Android devices are not the best with JavaFxPorts, but I haven't seen anything about Panasonic toughpads having known issues like Samsung. I did have to do some janky stuff to get the abdroid devices to register the touches as clicks, but that seems to be working fine now.
This has me as a standstill as I can not figure out why Android can not find the location but it works fine on the desktop.
Here is the file structure:
Project structure

Drag Cursor not showing on OSX

We have a large Java app that is used on both Windows and OSX.
We do custom Drag and Drop between 2 of our JTables.
On Windows, this works perfectly. The custom cursor is displayed as you drag over the target JTable.
On the Mac, the custom cursor is never displayed. Instead a gray rectangle (border only) is displayed when you start dragging. This rectangle is the width of the table column, and the height of the table. Our logging is showing that the dragOver() and dropActionChanged() methods are getting called, and we are setting the custom cursor. It just never gets displayed.
If I disable our custom cursor code, the same box is displayed - but it has the Circle/slash icon in the middle as well.
I want to get rid of the weird box, and display the custom cursor.
Excerpts from the code:
private class FileTransferHandler extends TransferHandler {
private static final long serialVersionUID = 1L;
private final Logger log = LogManager.getLogger();
private final CursorDragSourceListener dragSourceListener = new CursorDragSourceListener();
// Left out the Drop handling code that was here
#Override
public int getSourceActions( final JComponent c) {
log.debug("FileTransferHandler.getSourceAction: ");
return COPY | MOVE;
}
#Override
protected Transferable createTransferable( final JComponent c) {
log.debug("FileTransferHandler.createTransferable:");
List<iFilePage> pages = new ArrayList<iFilePage>();
// Left out the code that builds the pages list
DragSource.getDefaultDragSource().addDragSourceListener(dragSourceListener);
dragSourceListener.setCursorChoice(pages.size() == 1);
return new FilePageTransferable(pages);
}
#Override
protected void exportDone( final JComponent c,
final Transferable t,
final int action) {
log.debug("FileTransferHandler.exportDone: {}", action, t);
tblFixed.getSelectionModel().clearSelection();
DragSource.getDefaultDragSource().removeDragSourceListener(dragSourceListener);
return;
}
}
private static class CursorDragSourceListener implements DragSourceListener {
private Cursor singlePage = null;
private Cursor multiPage = null;
private Cursor badSinglePage = null;
private Cursor useCursor = null;
private boolean useSingle = false;
public CursorDragSourceListener() {
Toolkit toolkit = Toolkit.getDefaultToolkit();
URL url;
String name;
Image img;
url = FileUtils.getResourceURL("/images/page.png");
name = "DragPage";
img = toolkit.createImage(url);
singlePage = toolkit.createCustomCursor(img, new Point(16, 16), name);
url = FileUtils.getResourceURL("/images/badpage_stack.png");
name = "DragBadPage";
img = toolkit.createImage(url);
badSinglePage = toolkit.createCustomCursor(img, new Point(16, 16), name);
url = FileUtils.getResourceURL("/images/page_stack.png");
name = "DragPageStack";
img = toolkit.createImage(url);
multiPage = toolkit.createCustomCursor(img, new Point(16, 16), name);
return;
}
public void setCursorChoice( final boolean single) {
log.debug("CursorDragSourceListener.setCursorChoice: {}", single);
useSingle = single;
if (useSingle) {
useCursor = singlePage;
} else {
useCursor = multiPage;
}
return;
}
#Override
public void dropActionChanged( final DragSourceDragEvent dsde) {
log.debug("CursorDragSourceListener.dropActionChanged: {}", dsde.getDropAction(), useSingle);
if (dsde.getDropAction() == 2) {
if (!useSingle) {
useCursor = badSinglePage;
} else {
useCursor = singlePage;
}
} else {
if (useSingle) {
useCursor = singlePage;
} else {
useCursor = multiPage;
}
}
dsde.getDragSourceContext().setCursor(useCursor);
return;
}
#Override
public void dragOver( final DragSourceDragEvent dsde) {
try {
Object x = dsde.getDragSourceContext().getTransferable()
.getTransferData(DataFlavor.javaFileListFlavor);
log.trace("CursorDragSourceListener.dragOver: {}", (x != null) ? x.getClass().getSimpleName() : "null");
if (x instanceof ArrayList) {
dsde.getDragSourceContext().setCursor(useCursor);
}
} catch (Exception e) {
log.error("CursorDragSourceListener.dragOver:", e);
}
}
#Override
public void dragExit( final DragSourceEvent dse) {
}
#Override
public void dragEnter( final DragSourceDragEvent dsde) {
}
#Override
public void dragDropEnd( final DragSourceDropEvent dsde) {
}
}

After a bunch more checking and analysis, it turns out that our Custom Selection Model was causing this problem on OSX.
We have a selection model that allows you to select multiple individual cells, not just whole rows.
So the getMinSelectionindex() and getMaxSelectionIndex() methods returned dummy data, since we never used them.
That works fine on MS Win, but apparently the OSX drag and drop for JTable uses those calls.
After modifying our code to return reasonable values, the selection box is no longer as tall as the table.
The custom cursors appear most of the time, but still randomly disappear for no apparent reason.

GXT - 3: HTML code is displayed rather than the image

Find the image for the problem:
I am trying to create a column which displays multiple images which contains clickable events. But instead of image, I am getting the HTML code.
The column config I have written is as follows:
actionsCol = new ColumnConfig<SensorTreeModel,String>(new ValueProvider<SensorTreeModel, String>() {
com.sencha.project.client.Resources resources = GWT.create(com.sencha.project.client.Resources.class);
#Override
public String getValue(SensorTreeModel String) {
//ImageResource image = resources.add();
FlowPanel flowPanel = new FlowPanel();
ImageResource add = com.sencha.project.client.Resources.INSTANCES.add();
Image add1 = new Image(add);
flowPanel.add(add1);
//return add1;
return flowPanel.toString();
}
#Override
public void setValue(SensorTreeModel object, String value) {
if (object.getIsLeaf()) {
}
}
#Override
public String getPath() {
return "actions";
}
});
actionsCol.setHeader("");

In ColumnConfig<M,N> and ValueProvider<T,V>, N and V are the same and type of columns content. So on your example you are returning String as value. If you return ImageResource, column will show Image.
I hope it helps.
actionsCol = new ColumnConfig<SensorTreeModel,ImageResource>(new ValueProvider<SensorTreeModel, ImageResource>() {
com.sencha.project.client.Resources resources = GWT.create(com.sencha.project.client.Resources.class);
#Override
public ImageResource getValue(SensorTreeModel String) {
ImageResource add = com.sencha.project.client.Resources.INSTANCES.add();
return add;
}
#Override
public void setValue(SensorTreeModel object, ImageResource value) {
if (object.getIsLeaf()) {
}
}
#Override
public String getPath() {
return "actions";
}
});
actionsCol.setHeader("");
actionsCol.setCell(new ImageResourceCell());

Using additional Saveables in Eclipse AbstractTextEditor

I have a textual editor that extends AbstractTextEditor and I also have an Outline that needs to be saved when its content is modified by the user. I am currently using a Saveable which is added to the editor.
If the editor was marked as 'dirty' and it is saved, the Saveableis saved as well. However, if the Saveable's state changes to 'dirty', the * next to the file name does not appear. The save button in the top menu bar does show, but when I click it, nothing happens.
This is my implementation:
public class MyTextEditor extends AbstractTextEditor {
...
public void setOutlineSaveable(Saveable saveable) {
this.outlineSaveable = saveable;
ISaveablesLifecycleListener lifecycleListener = (ISaveablesLifecycleListener)getSite().getService(ISaveablesLifecycleListener.class);
lifecycleListener.handleLifecycleEvent( new SaveablesLifecycleEvent(this, SaveablesLifecycleEvent.POST_OPEN, new Saveable[] {saveable}, false));
}
#Override
public Saveable[] getSaveables() {
if(outlineSaveable != null) {
// copy Saveables from super.getSaveables() to a new array
Saveable[] superSaveables = super.getSaveables();
Saveable[] res = new Saveable[superSaveables.length + 1];
int i = 0;
for(; i < superSaveables.length; i++) {
res[i] = superSaveables[i];
}
res[i] = outlineSaveable;
return res;
}
else
return super.getSaveables();
}
public void saveableDirty() {
firePropertyChange(PROP_DIRTY);
}
}
My ContentOutlinePage:
public class GraphicalOutlinePage extends ContentOutlinePage {
...
private GraphicalOutlineSaveable saveable;
public Saveable getSaveable() {
return saveable;
}
class GraphicalOutlineSaveable extends Saveable {
private boolean dirty = false;
private IEditorPart editor;
public GraphicalOutlineSaveable(IEditorPart editor) {
this.editor = editor;
}
#Override
public void doSave(IProgressMonitor monitor) throws CoreException {
viewer.doSave(monitor);
dirty = false;
}
#Override
public boolean equals(Object obj) {
System.err.println("GraphicalOutline.GraphicalOutlineSaveable.equals");
return obj instanceof GraphicalOutlineSaveable && ((Saveable)obj).getName() == getName();
}
#Override
public ImageDescriptor getImageDescriptor() {
return editor.getEditorInput().getImageDescriptor();
}
#Override
public String getName() {
return "Graphical Outline: " + editor.getEditorInput().getName();
}
#Override
public String getToolTipText() {
return "";
}
#Override
public boolean isDirty() {
System.err.println("GraphicalOutlinePage.GraphicalOutlineSaveable.isDirty: " + dirty);
return dirty;
}
public void setDirty() {
System.err.println("GraphicalOutlinePage.GraphicalOutlineSaveable.setDirty");
dirty = true;
// notify text editor about property change
if(editor instanceof AbstractTextEditor) {
((MyTextEditor)editor).saveableDirty();
}
}
#Override
public int hashCode() {
return viewer.hashCode();
}
}
}
vieweris a GraphicalViewerdisplayed in the ContentOutlinePage.
Somewhere in another class, I then call:
textEditor.setSaveable(grOutlinePage.getSaveable());

You may need to override the main editor isDirty() method and test each of the Saveable objects dirty flags.
It seems that the handling of multiple Saveables is not done as cleanly is it might have been.

Component within ListView does not update on AJAX refresh

I have a Wicket Panel that contains a ListView and then sub-items (Form controls), but when I press an inner CheckBox, the visibility of some of the sub-items should change.
However, calling WebMarkupContainer.setVisible(false) does not hide the items within the ListView after the ListView is redrawn during the AJAX update.
Code below:
public class ImagePanel extends Panel {
private ArrayList<ImageEntry> imageEntryList;
public class ImageEntry implements Serializable {
private static final long serialVersionUID = -3987685200930059655L;
public String thumbnail;
public String filename;
public boolean webDownloaded;
public WebMarkupContainer fileUpload;
public WebMarkupContainer webDownload;
}
public ImagePanel(String id) {
this(id, IMAGE_NORMAL);
}
public ImagePanel(String id, int type) {
super(id);
this.type = type;
wmc = new WebMarkupContainer ("wmc");
wmc.setOutputMarkupId(true);
add(wmc);
imageEntryList = new ArrayList<ImageEntry>();
ImageEntry imageEntry = new ImageEntry();
imageEntry.thumbnail = "blah";
imageEntry.filename = "blah";
imageEntryList.add(imageEntry);
ListView<ImageEntry> llv = new LargeImageListView("large_image_list", imageEntryList);
wmc.add(llv);
SmallImageListView slv = new SmallImageListView("small_image_list", imageEntryList);
wmc.add(slv);
}
private final class SmallImageListView extends ListView<ImageEntry> {
private SmallImageListView(String id, List<? extends ImageEntry> list) {
super(id, list);
}
#Override
protected void populateItem(final ListItem<ImageEntry> item) {
...
if (type == IMAGE_WIZARD) {
item.getModelObject().fileUpload = showWizardFileUpload(item);
item.getModelObject().webDownload = showWizardWebDownload(item);
showSortUpDown(item);
showWebCheckbox(item);
}
}
}
private void showWebCheckbox(final ListItem<ImageEntry> item) {
AjaxCheckBox checkbox = new AjaxCheckBox("use_web_image", new PropertyModel<Boolean>(item.getModelObject(), "webDownloaded")) {
public void onUpdate(AjaxRequestTarget target) {
if (getModelObject()) {
System.out.println("Show");
item.getModelObject().fileUpload.setVisible(false);
item.getModelObject().webDownload.setVisible(false);
} else {
System.out.println("Hide");
item.getModelObject().fileUpload.setVisible(false);
item.getModelObject().webDownload.setVisible(false);
}
target.add(wmc);
}
};
item.add(checkbox);
}
...
}

Use ListView.setReuseItems(true) to ensure that the objects within the ListView are serialized correctly... Otherwise, you will receive a different object each time and the .setVisible() property will be reset to its default value (e.g. 'true').
slv.setReuseItems(true);

Try
WebMarkupContainer.add(new AttributeModifier("style", new Model("display:none")));
or
WebMarkupContainer.add(new AttributeAppender("style", new Model("display:none"), "="));
instead.