I know this is probably an easy error to fix but I am not finding it. When the alert box comes up and you click on it takes 2 clicks to close it
private Product getProductById(int id) {
ObservableList<Product> allProducts = Inventory.getAllProducts();
for(int i = 0; i < allProducts.size(); i++) {
Product inv = allProducts.get(i);
if(inv.getId() == id) {
return inv;
} else {
Alert alert = new Alert(AlertType.INFORMATION);
alert.setTitle("Information Dialog");
alert.setHeaderText("Item Not Found");
alert.setContentText("The item you are searching for is not in the list!");
alert.show();
break;
}
}
return null;
}
Try using showAndWait instead of show
Related
I'm working on a simple multi-staged registration page for a site I'm building, and I give the user the choice of choosing programs/programming languages he knows using checkboxes:
but when I hit the "next" button, in order to go to the next stage, the checkbox I checked isn't set to true, but checkbox no. 18 is set to true(although I didn't check it)
I'm certain it has something to do with the stage before this one, in which I'm building dynamically radio buttons in which the user is choosing his profession (such as Artist, singer and etc').
there are 17 radio buttons, and they are somehow interfering with the next stage, in which the checkbox's checked values are only starting from checkbox no. 18 as I mentioned earlier.
here is some of the code:
else if (int.Parse(ViewState["DivID"].ToString()) == 2)
{
// save the Birthday Date, Language and country of the user.
ViewState["year"] = int.Parse(DropDownYear.SelectedValue);
ViewState["month"] = int.Parse(DropDownMonth.SelectedValue);
ViewState["day"] = int.Parse(DropDownDay.SelectedValue);
ViewState["Language"] = int.Parse(langDropDown.SelectedValue);
ViewState["Country"] = int.Parse(CountryDropDown.SelectedValue);
// ---------------------------------------------
// change from part 2 of the registration to part 3
registrationP2.Visible = false;
BindProfessions(radios, Page);
registrationP3.Visible = true;
radios.Visible = true;
}
else if (int.Parse(ViewState["DivID"].ToString()) == 3)
{
// change from part 3 of the registration to part 4
ViewState["Profid"] = CheckRadio(radios);
registrationP3.Visible = false;
BindKnowledge(CheckboxCon, Page);
registrationP4.Visible = true;
CheckboxCon.Visible = true;
// ---------------------------------------------
//next.Visible = true;
}
else if(int.Parse(ViewState["DivID"].ToString()) == 4)
{
List<int> v = GetCheckBox(CheckboxCon);
ViewState["Knowids"] = GetCheckBox(CheckboxCon);
}
Binding methods:
public static void BindProfessions(HtmlControl ctrl, Page thispage)
{
List<Profession> Plist = Profession.GetProfessionList();
foreach (Profession p in Plist)
{
HtmlInputRadioButton rd_button = new HtmlInputRadioButton();
const string GROUP_NAME = "Professions";
rd_button.Name = GROUP_NAME;
string LinkID = "P" + p.ProfessionID.ToString();
rd_button.Attributes["id"] = LinkID;
RegisterUserControl userprofession = (RegisterUserControl)thispage.LoadControl("~/RegisterUserControl.ascx");
userprofession.imgP = p.ProfPath;
userprofession.fieldName = p.ProfName;
userprofession.IDnum = p.ProfessionID;
userprofession.RadioName = LinkID;
userprofession.EnableViewState = false;
rd_button.EnableViewState = false;
ctrl.Controls.Add(rd_button);
rd_button.Value = p.ProfessionID.ToString();
ctrl.Controls.Add(userprofession);
}
}
public static void BindKnowledge(HtmlControl ctrl, Page thispage)
{
List<Knowledge> Plist = Knowledge.RetKnowledgeList();
foreach (Knowledge p in Plist)
{
HtmlInputCheckBox rd_button = new HtmlInputCheckBox();
const string GROUP_NAME = "knowledge";
rd_button.Name = GROUP_NAME;
string LinkID = "Know" + p.ProgramID.ToString();
rd_button.Attributes["id"] = LinkID;
rd_button.Value = p.ProgramID.ToString();
RegisterUserControl userprofession = (RegisterUserControl)thispage.LoadControl("~/RegisterUserControl.ascx");
userprofession.imgP = p.ProgPath;
userprofession.fieldName = p.PName;
userprofession.IDnum = p.ProgramID;
userprofession.RadioName = LinkID;
userprofession.EnableViewState = false;
rd_button.EnableViewState = false;
ctrl.Controls.Add(rd_button);
ctrl.Controls.Add(userprofession);
}
}
checking methods for both radios and checkbox :
public static int CheckRadio(HtmlControl ctrl)
{
try
{
int counter = 0;
int id = -1;
foreach (Control rdButton in ctrl.Controls)
{
if (rdButton is HtmlInputRadioButton)
{
HtmlInputRadioButton bu = (HtmlInputRadioButton)rdButton;
if (bu.Checked)
{
counter++;
id = int.Parse(bu.Value);
}
}
}
if (counter > 1)
{
return -1;
}
return id;
}
catch (Exception e)
{
return -1;
}
}
public static List<int> GetCheckBox(HtmlControl ctrl)
{
List<int> id_list = new List<int>();
foreach (Control rdButton in ctrl.Controls)
{
if (rdButton is HtmlInputCheckBox)
{
HtmlInputCheckBox bu = (HtmlInputCheckBox)rdButton;
if (bu.Checked)
{
id_list.Add(int.Parse(bu.Value));
}
}
}
return id_list;
}
}
when debugging you can see, that if I choose the first 3 professions, the values returned to me in the List<int> v are 18, 19, and 20
photo: debugging photo
I should mention that after I create the dynamic usercontrols and checkbox/radion buttons, I'm creating them again at postback in protected void Page_Load.
I'm stuck on this for days, and I don't know from where the problem emanates, is it because of ViewState, or the way I'm creating the controls... I really don't know.
Thanks in advance, Idan.
edit:
I played with it a bit, and have found out that when I disable the Binding of the professions which I have initiated earlier in Page_load it does work correctly, page load code look at the second if statement :
protected void Page_Load(object sender, EventArgs e)
{
IsPageRefresh = false;
if (!IsPostBack)
{
ViewState["DivID"] = 1;
ViewState["postids"] = System.Guid.NewGuid().ToString();
Session["postid"] = ViewState["postids"].ToString();
}
else
{
if (ViewState["postids"].ToString() != Session["postid"].ToString())
{
IsPageRefresh = true;
}
Session["postid"] = System.Guid.NewGuid().ToString();
ViewState["postids"] = Session["postid"].ToString();
}
if (int.Parse(ViewState["DivID"].ToString()) == 3)
{
//BindProfessions(radios, Page);
}
else if(int.Parse(ViewState["DivID"].ToString()) == 4)
{
BindKnowledge(CheckboxCon, Page);
}
}
the problem is that I still need to initiate it again after hitting the button in order to get the checked value, how can I fix this thing, and why this is happening? your help would very much be appreciated.
The problem happens because the page recognize that I added 17 new checkbox's, and than when I go over them the first 17 are not checked until the 18'th(the first one of the ones that I checked) what ends up not checking the right checkbox....
And to make it clears I add the other radio buttons to a different div on the page, I don't know what is happening here
for anyone who has the same problem.
I ended up creating the object in Page_PreInit() and it solved the problem, it is recommended(by things I read) to create dynamic objects in Page_PreInit, before anything else is happening to the page.
protected void Page_PreInit(object sender, EventArgs e)
{
try
{
if (!IsPostBack && Session["DivID"] == null)
{
Session["DivID"] = 1;
}
if ((int)Session["DivID"] == 3)
{
InitBindProfessions(Page);
}
else if ((int)Session["DivID"] == 4)
{
InitBindKnowledge(Page);
}
}
catch
{
Response.Redirect("HomePage.aspx");
}
}
InitBindKnowledge and InitBindProfessions are just like BindKnowledge and BindProfession but without adding usercontrols to the control tree
I am using TabbedPage for implementing tabs in my apps. I have 4 tabs and always open the second tab initially since the first tab is the home tab. When selecting the second tab third tab is also loading in the background and when selecting the third tab fourth tab is also loading in the background.
TabbedPage Code:
var homePage = new Pages.HomePage()
{
Title = "Home"
};
var secondPage= new SecondPage()
{
Title = "SecondPage"
};
var thirdPage = new ThirdPage()
{
Title = "ThirdPage"
};
var fourthPage = new FourthPage()
{
Title = "FourthPage"
};
Children.Add(homePage);
Children.Add(secondPage);
Children.Add(thirdPage);
Children.Add(fourthPage);
CurrentPage = Children[1];
this.CurrentPageChanged += (object sender, EventArgs e) =>
{
var i = this.Children.IndexOf(this.CurrentPage);
if (i == 0)
{
CallHomePage();
}
else if (i == 1)
{
//SecondPage icon settings
}
else if (i == 2)
{
//ThirdPage icon settings
}
else if (i == 3)
{
//FourthPage icon settings
}
};
How can I stop the loading of the adjacent tab when selecting a tab?
Solution: You can get the index of currentPage in method OnCurrentPageChanged And if the index equals 1(second page) , use the messagecenter to send message to the page.Refer the following code .
in Tabbed Page
protected override void OnCurrentPageChanged()
{
base.OnCurrentPageChanged();
int index = Children.IndexOf(CurrentPage);
if (index == 1)
{
MessagingCenter.Send<Object>(this, "click_second_tab");
}
else if (index == 2)
{
MessagingCenter.Send<Object>(this, "click_third_tab");
}
else if (index == 3)
{
//...
}
}
in the second page .Move the code that load data from onAppearing to the constructor
public SecondPage()
{
//...
MessagingCenter.Subscribe<Object>(this, "click_second_tab", (obj) =>
{
//load your data here
});
}
Well, as with all arrays/lists in C#, the Children list is zero-indexed, which means the first element is at Children[0].
... that is after all its properties - including its value - are updated?
The use-case is a Task that
"collects" items into an ObservableList which is the result of the call method
the list should be set as value when the task is "finished", no matter if normally or cancelled
A snippet of the Task implementation (complete example at end):
#Override
protected ObservableList<Rectangle> call() throws Exception {
ObservableList<Rectangle> results = FXCollections.observableArrayList();
for (int i=0; i<=count; i++) {
// do fill list
//...
try {
Thread.sleep(200);
} catch (InterruptedException interrupted) {
if (isCancelled()) {
// do update value on cancelled
updateValue(results);
break;
}
}
}
return results;
}
It's intended usage:
bind the itemsProperty of a tableView to the valueProperty
unbind on "finished"
My approach was to listen to its state property and unbind on state changes to SUCCEEDED or CANCELLED. The former works just fine, the latter doesn't because at the time of receiving the cancelled, the value is not yet updated and consequently the items not set.
// working ... but when to unbind?
table.itemsProperty().bind(task.valueProperty());
task.stateProperty().addListener((src, ov, nv) -> {
if (Worker.State.SUCCEEDED == nv ) {
// this is fine because implementation in TaskCallable first
// updates the value (with the result it got from T call())
// then updates state
LOG.info("succeeded" + task.getValue());
table.itemsProperty().unbind();
} else if (Worker.State.CANCELLED == nv) {
LOG.info("receiving cancelled " + task.getValue());
// can't unbind here, value not yet updated
// table.itemsProperty().unbind();
}
});
So in case of cancelled, this leaves me with either a property that's still bound or an empty table. Feels like I'm doing something wrong. Or core Task impl is not as useful as expected? It would mean that we simply can't bind to the value property (nor any of the others like progress) due to being unable to safely cleanup (using table items here is just an example, because it's easy to see, same for all types of properties).
Question is, how to do it correctly/overcome the limitation?
The complete example:
public class TaskValueBinding extends Application {
private Parent createListPane() {
Task<ObservableList<Rectangle>> task = createListTask();
Thread thread = new Thread(task);
thread.setDaemon(true);
TableView<Rectangle> table = new TableView<>();
TableColumn<Rectangle, Double> xCol = new TableColumn<>("X");
xCol.setCellValueFactory(new PropertyValueFactory<>("x"));
TableColumn<Rectangle, Double> yCol = new TableColumn<>("Y");
yCol.setCellValueFactory(new PropertyValueFactory<>("y"));
table.getColumns().addAll(xCol, yCol);
// working ... but when to unbind?
table.itemsProperty().bind(task.valueProperty());
task.stateProperty().addListener((src, ov, nv) -> {
if (Worker.State.SUCCEEDED == nv ) {
// this is fine because implementation in TaskCallable first
// updates the value (with the result it got from T call())
// then updates state
LOG.info("succeeded" + task.getValue());
table.itemsProperty().unbind();
} else if (Worker.State.CANCELLED == nv) {
LOG.info("receiving cancelled " + task.getValue());
// can't unbind here, value not yet updated
// table.itemsProperty().unbind();
}
});
Label messageLabel = new Label("Message: ");
Label message = new Label();
message.textProperty().bind(task.messageProperty());
Label progressAsText = new Label();
Label progressLabel = new Label("Progress: ");
progressAsText.textProperty().bind(task.progressProperty().asString());
ProgressBar progress = new ProgressBar();
progress.progressProperty().bind(task.progressProperty());
Button start = new Button("Start");
start.setOnAction(e -> {
start.setDisable(true);
thread.start();
});
Button cancel = new Button("Cancel");
cancel.setOnAction(e -> task.cancel());
cancel.disableProperty().bind(task.runningProperty().not());
int row = 0;
GridPane grid = new GridPane();
grid.add(table, 0, row++, 20, 1);
grid.add(messageLabel, 0, row);
grid.add(message, 1, row++);
grid.add(progressLabel, 0, row);
grid.add(progressAsText, 1, row++);
grid.add(progress, 0, row++, 2, 1);
grid.add(start, 0, row);
grid.add(cancel, 1, row++);
return grid;
}
private Task<ObservableList<Rectangle>> createListTask() {
Task<ObservableList<Rectangle>> task = new Task<ObservableList<Rectangle>>() {
#Override
protected ObservableList<Rectangle> call() throws Exception {
updateMessage("Creating Rectangles ...");
ObservableList<Rectangle> results = FXCollections.observableArrayList();
String message = "finished";
int count = 10;
for (int i=0; i<=count; i++) {
if (isCancelled()) {
updateValue(results);
// when do we get here?
message = "cancelled";
break;
}
Rectangle r = new Rectangle(10, 10);
r.setX(10 * i);
results.add(r);
updateProgress(i, count);
// Now block the thread for a short time, but be sure
// to check the interrupted exception for cancellation!
try {
Thread.sleep(200);
} catch (InterruptedException interrupted) {
if (isCancelled()) {
updateValue(results);
message = "interrupted";
break;
}
}
}
updateMessage(message);
return results;
}
};
return task;
}
#Override
public void start(Stage stage) throws Exception {
stage.setScene(new Scene(createListPane()));
stage.setTitle(FXUtils.version());
stage.show();
}
public static void main(String[] args) {
launch(args);
}
#SuppressWarnings("unused")
private static final Logger LOG = Logger
.getLogger(TaskValueBinding.class.getName());
}
Cancelling the task immediately triggers an update of the state property. If canceled from the application thread Platfrom.runLater is not used for this purpose but the call of the cancel method updates the state immediately. This results in the state being changed before any updateValue call updates the value property using Platform.runLater.
Task is not designed to allow partial results so you need to implement custom logic to accommodate for this. Depending on your needs you could subclass Task to trigger a custom event when the task completes in any way.
public abstract class PartialResultTask<T> extends Task<T> {
// handler triggered after last change of value
private Runnable onDone;
public Runnable getOnDone() {
return onDone;
}
public void setOnDone(Runnable onDone) {
this.onDone = onDone;
}
protected abstract T calculateResult() throws Exception;
private void onDone() {
if (onDone != null) {
Platform.runLater(onDone);
}
}
#Override
protected final T call() throws Exception {
try {
T result = calculateResult();
updateValue(result); // update value to the final value
onDone();
return result;
} catch (Exception ex) {
onDone();
throw ex;
}
}
}
private PartialResultTask<ObservableList<Rectangle>> createListTask() {
PartialResultTask<ObservableList<Rectangle>> task = new PartialResultTask<ObservableList<Rectangle>>() {
#Override
protected ObservableList<Rectangle> calculateResult() throws Exception {updateMessage("Creating Rectangles ...");
ObservableList<Rectangle> results = FXCollections.observableArrayList();
int count = 10;
for (int i = 0; !isCancelled() && i <= count; i++) {
Rectangle r = new Rectangle(10, 10);
r.setX(10 * i);
results.add(r);
updateProgress(i, count);
// Now block the thread for a short time, but be sure
// to check the interrupted exception for cancellation!
try {
Thread.sleep(200);
} catch (InterruptedException interrupted) {
}
}
updateMessage(isCancelled() ? "canceled" : "finished");
return results;
}
};
return task;
}
task.setOnDone(() -> {
table.itemsProperty().unbind();
});
task.stateProperty().addListener((src, ov, nv) -> {
if (Worker.State.SUCCEEDED == nv) {
// this is fine because implementation in TaskCallable first
// updates the value (with the result it got from T call())
// then updates state
LOG.info("succeeded" + task.getValue());
} else if (Worker.State.CANCELLED == nv) {
LOG.info("receiving cancelled " + task.getValue());
}
});
I've got a filtered TableView populate from a ObservableList, when I update an item from ObservableList, item is not update in UI, but if I made a search into table, item appears.
tbcNombre.setCellValueFactory(new PropertyValueFactory<>("nombre"));
tbcApellidos.setCellValueFactory(new PropertyValueFactory<>("apellidos"));
tbcAsistencia.setCellValueFactory(new Callback<CellDataFeatures<Alumno, Alumno>, ObservableValue<Alumno>>() {
#Override
public ObservableValue<Alumno> call(CellDataFeatures<Alumno, Alumno> features) {
return new ReadOnlyObjectWrapper(features.getValue());
}
});
//datamodel.getAlumnos() returns an observablelist
datosFiltrados = new FilteredList<>(datamodel.getAlumnos());
listaOrdenada = new SortedList<>(datosFiltrados);
listaOrdenada.comparatorProperty().bind(tbvAlumnos.comparatorProperty());
tbvAlumnos.setItems(listaOrdenada);
When I use search function (enter something into textfieldbuscar) tableview is update and I can see update item):
txtBuscar.textProperty().addListener((observable, oldValue, newValue) -> {
datosFiltrados.setPredicate(alumnoAux -> {
boolean aux = false;
if (StringUtils.isEmpty(newValue)) {
aux = true;
} else if (alumnoAux.toString().toLowerCase().contains(newValue.toLowerCase())) {
aux = true;
}
return aux;
});
if (datosFiltrados.size() == 0) {
btnDetalles.setDisable(true);
btnBorrar.setDisable(true);
} else {
btnDetalles.setDisable(false);
btnBorrar.setDisable(false);
}
});
I have a TableView with textboxes in each column. If I write something in one of the textboxes, the tableview gets filtered based on all the textboxes. For now the code I have listens to change in the textboxes, and filters as soon as the text changes. The following code works fine, but is it any way to make it more efficient?
Probably the best way would be to listen to a enter press instead of filtering on every change in the textfield? Does predicateProperty support this? If not, how can I change from predicateProperty/binding to onKey press instead?
filteredItems.predicateProperty().bind(Bindings.createObjectBinding(()
-> li -> {
for (int i = 0; i < li.size(); i++) {
{
if (!li.get(i).toLowerCase().
contains(
listOfTxtFields.get(i).getText().toLowerCase()
)) {
return false;
}
}
}
return true;
},
listOfTxtFields.stream().map(TextField::textProperty)
.collect(Collectors.toList())
.toArray(new StringProperty[listOfTxtFields.size()])));
I actually managed to fix this by some experimenting. It's pretty efficient, but could be a tad faster when it becomes tons of rows, so if you have any suggestions to making it faster, I would love to hear them. This is what I did:
Created a method that will be called each time a user presses enter on a textField in the columns:
void filter() {
DateTest dateTest = new DateTest();
filteredItems.setPredicate(li -> {
for (int i = 0; i < li.size(); i++) {
if (dateTest.isValidDate(listOfTxtFields.get(i).getText().replace("a", "").replace("b", ""))) {
try {
dateTest.isValidDate(li.get(i));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date1 = sdf.parse(li.get(i));
Date date2 = sdf.parse(listOfTxtFields.get(i).getText().replace("a", "").replace("b", ""));
if (listOfTxtFields.get(i).getText().contains("a")) {
if (date1.after(date2)) {
return true;
}
}
if (listOfTxtFields.get(i).getText().contains("b")) {
if (!date1.before(date2)) {
return false;
}
} else {
if (!date1.equals(date2)) {
return false;
}
}
} catch (ParseException ex) {
Logger.getLogger(Table.class.getName()).log(Level.SEVERE, null, ex);
}
} else {
if (!li.get(i).toLowerCase().
contains(
listOfTxtFields.get(i).getText().toLowerCase()
)) {
return false;
}
}
}
return true;
});
}