How can I disable button in MaterialAlertDialogBuilder?
I want to make similar functionality like in this screenshot:
enter image description here
I wrote the following code (dialog contains EditText where user should input his favorite food name).
final MaterialAlertDialogBuilder dialogEnterDishName = new MaterialAlertDialogBuilder(context);
//...
final EditText editTextEnterDishName = new EditText(context);
dialogEnterDishName.setView(editTextEnterDishName);
dialogEnterDishName.setPositiveButton(getString(R.string.dialog_enter_dish_name_positive_button), new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (!editTextEnterDishName.getText().toString().equals(""))
//...
else {
//TODO Make posititve button disabled until the user enters any character
}
}
});
//...
dialogEnterDishName.show();
}
I already knew, that class AlertDialog (MaterialAlertDialogBuilder extends AlertDialog.Builder) have a method public Button getButton(int whichButton), but I can't use it in MaterialAlertDialogBuilder.
Please, help!
Make sure that you are calling getButton() function after you inflate your AlertDialog (through .show() call). If you are doing it other way around there is no button to get.
In order to enable button back you can use TextWatcher. More details here: Android TextWatcher.afterTextChanged vs TextWatcher.onTextChanged
val customLayout = LayoutInflater.from(context).inflate(R.layout.your_alert_dialog, null, false)
val dialog = MaterialAlertDialogBuilder(context)
.setTitle("Provide name")
.setView(customLayout)
.setNeutralButton("Cancel") { dialog, _ -> dialog.dismiss() }
.setPositiveButton("Confirm") { _, _ -> }
.create()
dialog.show()
dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
Related
I'm writing a JavaFX program with a TableView called 'table' and 2 buttons called 'previous' & 'next'.
Here is part of the code:
previous.setOnAction(event -> {
table.getSelectionModel().selectPrevious();
});
next.setOnAction(event -> {
table.getSelectionModel().selectNext();
});
However, if I keep pressing the buttons, the table will not scroll automatically to keep the selected item visible. So I modified the code like this :
previous.setOnAction(event -> {
table.getSelectionModel().selectPrevious();
table.scrollTo(table.getSelectionModel().getSelectedItem());
});
next.setOnAction(event -> {
table.getSelectionModel().selectNext();
table.scrollTo(table.getSelectionModel().getSelectedItem());
});
But it will always try to keep the selected item at the top of the visible region. If I keep pressing 'next'. The selected item will stay at the top instead of staying at the bottom.
I want to mimic the natural behavior of a tableview in the way that if I press up or down on the keyboard with something selected, the tableview will scroll automatically to keep the selected item visible.
How should I modify the code to make the auto scrolling more natural when I press the buttons?
Thanks
The problem is
missing fine-grained control of scrollTo target location on application level
the (somewhat unfortunate) implementation of virtualizedControl.scrollTo(index) which (ultimately) leads to calling flow.scrollToTop(index)
There's a long-standing RFE (reported 2014!) requesting better control from application code. Actually, VirtualFlow has public methods (scrollToTop, scrollTo, scrollPixels) providing such, only they are not passed on to the control layer (getVirtualFlow in VirtualContainerBase is final protected), so can't be overridden in a custom skin. Since fx12, we can hack a bit, and expose the onSelectXX of Tree/TableViewSkin and use those, either directly in application code (example below) or in a custom TableView.
Example code:
public class TableSelectNextKeepVisible extends Application {
/**
* Custom table skin to expose onSelectXX methods for application use.
*/
public static class MyTableSkin<T> extends TableViewSkin<T> {
public MyTableSkin(TableView<T> control) {
super(control);
}
/**
* Overridden to widen scope to public.
*/
#Override
public void onSelectBelowCell() {
super.onSelectBelowCell();
}
/**
* Overridden to widen scope to public.
*/
#Override
public void onSelectAboveCell() {
super.onSelectAboveCell();
}
}
private Parent createContent() {
TableView<Locale> table = new TableView<>(FXCollections.observableArrayList(Locale.getAvailableLocales())) {
#Override
protected Skin<?> createDefaultSkin() {
return new MyTableSkin<>(this);
}
};
TableColumn<Locale, String> country = new TableColumn<>("Column");
country.setCellValueFactory(new PropertyValueFactory<>("displayLanguage"));
table.getColumns().addAll(country);
Button next = new Button("next");
next.setOnAction(e -> {
table.getSelectionModel().selectNext();
// scrolls to top
// table.scrollTo(table.getSelectionModel().getSelectedIndex());
((MyTableSkin<?>) table.getSkin()).onSelectBelowCell();
});
Button previous = new Button("previous");
previous.setOnAction(e -> {
table.getSelectionModel().selectPrevious();
// scrolls to top
// table.scrollTo(table.getSelectionModel().getSelectedIndex());
((MyTableSkin<?>) table.getSkin()).onSelectAboveCell();
});
BorderPane content = new BorderPane(table);
content.setBottom(new HBox(10, next, previous));
return content;
}
#Override
public void start(Stage stage) throws Exception {
stage.setScene(new Scene(createContent()));
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
try using getSelectedIndex as follows instead of using getSelectedItem
previous.setOnAction(event -> {
table.getSelectionModel().selectPrevious();
table.scrollTo(table.getSelectionModel().getSelectedIndex());
});
Platform.runLater( () -> TABLE_NAME.scrollTo(TABLE_INFORMATION_LIST.getList().size()-index) );
should work if you call it whenever you add information to the table.
I'm trying to setup a backdoor on an application which I'm working on.
I want to load a new Window when the user presses "CTRL + ALT + F12".
This is what I have tried so far though it is terribly bad.
//packages
import java.awt.EventQueue;
import java.awt.KeyEventDispatcher;
import java.awt.KeyboardFocusManager;
//...
private void setupBackPass(){
HashMap<KeyStroke, Action> actionMap = new HashMap<KeyStroke, Action>();
KeyStroke key1 = KeyStroke.getKeyStroke(KeyEvent.ALT, KeyEvent.CTRL_DOWN_MASK);
actionMap.put(key1, new AbstractAction("action1") {
#Override
public void actionPerformed(ActionEvent e) {
System.out.println("Ctrl-ALT pressed: " +e);
}
});
KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
kfm.addKeyEventDispatcher(new KeyEventDispatcher() {
#Override
public boolean dispatchKeyEvent(KeyEvent e) {
KeyStroke keyStroke = KeyStroke.getKeyStrokeForEvent(e);
if(actionMap.containsKey(keyStroke)){
final Action a = actionMap.get(keyStroke);
final ActionEvent ae = new ActionEvent(e.getSource(), e.getID(), null);
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
}
});
return false;
}
});
});
}
Am not sure how to do it but I would like it that if the keys are pressed then a Super admin window should be opened.
From the code you posted, it looks like you are using Swing and not JavaFX. It also looks like you are trying to use Key Bindings. As explained in that link, you need to modify both the input map and the action map. Also, you don't create an action map, you use the existing one. Again, that is explained in the page that I provided a link to.
I want to implement enable/disable property of toolbar item.
Here is the scenario,
On toolbar item activation I want to open dialog box.
issue:
When I tapped the toolbar item multiple times then it call multiple times dialog box. Please give some solution to handle the multiple calling of dialog box.
To prevent the multiple clicks, you can use a variable, to prevent calling the Dialog while waiting for the result confirmation.
first, in your class declare a variable canTap;
private bool _canTap = true;
Assuming your method when tapping the toolbar is like this:
private void ItemTapped(object sender, EventArgs args)
{
if(_canTap)
{
_canTap= false;
Device.BeginInvokeOnMainThread(async () => {
var response = await
UserDialogs.Instance.ConfirmAsync(new ConfirmConfig { Message = "Are you sure you want to logout from this app?", Title = "Logout", OkText = "YES", CancelText = "NO" );
if(response)
{
}
else
{
}
_canTap = true;)};
}
Nowadays I am working on raspberry pi and I write some programs in java , javafx platforms.I just would like to inform you that I am simply beginner on javafx.
According to that I just would like to trigger ENTER key after changing my textfield.Working principle of my program is like this;
1)I have created one masterform fxml and it is directing all other pages with one textfield.
2)I created main method that let me to use keyboard to enter some specific String values to assign them to textfield for page alteration.
3)I have a bridge java page, it includes global variables to use everywhere in project.So Firstly I set value from keyboard to these global variables.These global variables are created as stringproperty for adding actionlistener for any change.
4)Then I set these global variables to textfield.
5)Textfield indicates relevant values from keyboard.But Unfortunately I can not forward the pages without pressing to enter key.In this case ı would like to trigger this textfield.But unfortunately ı have no idea how to trigger texfield without pressing enter key.Therefore I decided to make auto trigger to enter key for this textfield.
I simply used robot method;
Robot robot = new Robot();
robot.keyPress(KeyEvent.VK_ENTER);
But it didn't work.Because After I set the global variable to textfield for first time.It does not define the value of the textfield is changed.It determines after pressing the enter key.
So how can I trigger this textfield after getting value of my global variables.I would like to pass how to set pages, I will show you how my program works.
Example of my code is;
Main method
public static void main(String[] args) {
Scanner scanner=new Scanner(System.in);
for (String strBarcode = scanner.nextLine(); !strBarcode.isEmpty();
strBarcode = scanner.nextLine()) {
if (strBarcode.equals("distribution")){
Global.G_MOD.set("distribution");
System.out.println(Global.G_MOD.get());
}
}}
GlobalVariables.java(bridge page)
public class Global{
public static StringProperty G_MOD = new SimpleStringProperty("");
}
My MasterController Page for javafx
public class masterformController implements Initializable {
#FXML
public TextField tbxBarcode;
#FXML
void onchangetbxBarcode(ActionEvent event) {
if(Global.G_MOD.get().equals("distribution")){
try {
FXMLLoader loader = new FXMLLoader(getClass().getResource("/puttolightfx/fxml/page1.fxml"));
Parent rootpage1 = (Parent)loader.load();
pnPages.getChildren().clear();
pnPages.getChildren().add(rootpage1);
} catch (IOException ex) {
Logger.getLogger(masterformController.class.getName()).log(Level.SEVERE, null, ex);
}
}
#Override
public void initialize(URL url, ResourceBundle rb) {
Global.G_MOD.addListener(new ChangeListener(){
#Override
public void changed(ObservableValue observable, Object oldValue, Object newValue) {
String Newvalue = (String)newValue;
tbxBarcode.setText(Global.G_MOD.get());}
});
}
}
So Everything is working, just I have to trigger textfield when the global value : Global.G_MOD is indicated on texfield.Then it will pass to another page according to global value of Global.G_MOD : "distribution".
SOLUTION(SOLVED):
I solved my problem using thread on listener of the textfield.I gave up to trigger enter key automatically and focused on textfield change.
I simply decided to use thread to change .fxml pages in textfield listener.
Platform.runLater(new Runnable() {
#Override
public void run() {
//if you change the UI, do it here !
}
});
EDITED CODE :
tbxBarcode.textProperty().addListener((ObservableValue<? extends String> observable, String oldValue, String newValue) -> {
String Newvalue=(String)newValue;
System.out.println(tbxBarcode.getText());
Platform.runLater(new Runnable() {
#Override
public void run() {
if(Global.G_MOD.get().equals("distribution")){
try {
FXMLLoader loader = new FXMLLoader(getClass().getResource("/puttolightfx/fxml/page1.fxml"));
Parent rootpage1 = (Parent)loader.load();
pnPages.getChildren().clear();
pnPages.getChildren().add(rootpage1);
} catch (IOException ex) {
Logger.getLogger(masterformController.class.getName()).log(Level.SEVERE, null, ex);
}
}
// }
}
});
});
Try using
textField.fireEvent(new KeyEvent(KeyEvent.KEY_PRESSED, "", "", KeyCode.ENTER, true, true, true, true));
According to the docs
public KeyEvent(EventType<KeyEvent> eventType,
String character,
String text,
KeyCode code,
boolean shiftDown,
boolean controlDown,
boolean altDown,
boolean metaDown)
Constructs new KeyEvent event with null source and target and KeyCode object directly specified.
Parameters:
eventType - The type of the event.
character - The character or sequence of characters associated with the event
text - A String describing the key code
code - The integer key code
shiftDown - true if shift modifier was pressed.
controlDown - true if control modifier was pressed.
altDown - true if alt modifier was pressed.
metaDown - true if meta modifier was pressed.
Since:
JavaFX 8.0
You can refer https://docs.oracle.com/javase/8/javafx/api/javafx/scene/input/KeyEvent.html
Edit 1
You need to identify the moment when Enter key event must be triggered.
For example:
If your textfield allows a limited number of characters, then you can add the above mentioned code in the following way:
txtField.textProperty().addListener(new ChangeListener<String>() {
#Override
public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
if (newValue.length()>30) {
txtField.setText(oldValue);
txtField.fireEvent(new KeyEvent(KeyEvent.KEY_PRESSED, "", "", KeyCode.ENTER, true, true, true, true));
}
}
});
This is just an example. It can fire your event multiple times, so you need to write the code to fire the event just once.
From the examples at Xamarin.com you can build basic M.T. Dialog apps, but how do you build a real life application?
Do you:
1) Create a single DialogViewController and tree every view/RootElement from there or,
2) Create a DialogViewController for every view and use the UINavigationController and push it on as needed?
Depending on your answer, the better response is how? I've built the example task app, so I understand adding elements to a table, click it to go to the 'next' view for editing, but how to click for non-editing? How to click a button, go next view if answer is number 1?
Revised:
There is probably no one right answer, but what I've come up with seems to work for us. Number 2 from above is what was chosen, below is an example of the code as it currently exists. What we did was create a navigation controller in AppDelegate and give access to it throughout the whole application like this:
public partial class AppDelegate : UIApplicationDelegate
{
public UIWindow window { get; private set; }
//< There's a Window property/field which we chose not to bother with
public static AppDelegate Current { get; private set; }
public UINavigationController NavController { get; private set; }
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
Current = this;
window = new UIWindow (UIScreen.MainScreen.Bounds);
NavController = new UINavigationController();
// See About Controller below
DialogViewController about = new AboutController();
NavController.PushViewController(about, true);
window.RootViewController = NavController;
window.MakeKeyAndVisible ();
return true;
}
}
Then every Dialog has a structure like this:
public class AboutController : DialogViewController
{
public delegate void D(AboutController dvc);
public event D ViewLoaded = delegate { };
static About about;
public AboutController()
: base(about = new About())
{
Autorotate = true;
about.SetDialogViewController(this);
}
public override void LoadView()
{
base.LoadView();
ViewLoaded(this);
}
}
public class About : RootElement
{
static AboutModel about = AboutVM.About;
public About()
: base(about.Title)
{
string[] message = about.Text.Split(...);
Add(new Section(){
new AboutMessage(message[0]),
new About_Image(about),
new AboutMessage(message[1]),
});
}
internal void SetDialogViewController(AboutController dvc)
{
var next = new UIBarButtonItem(UIBarButtonSystemItem.Play);
dvc.NavigationItem.RightBarButtonItem = next;
dvc.ViewLoaded += new AboutController.D(dvc_ViewLoaded);
next.Clicked += new System.EventHandler(next_Clicked);
}
void next_Clicked(object sender, System.EventArgs e)
{
// Load next controller
AppDelegate.Current.NavController.PushViewController(new IssuesController(), true);
}
void dvc_ViewLoaded(AboutController dvc)
{
// Swipe location: https://gist.github.com/2884348
dvc.View.Swipe(UISwipeGestureRecognizerDirection.Left).Event +=
delegate { next_Clicked(null, null); };
}
}
Create a sub-class of elements as needed:
public class About_Image : Element, IElementSizing
{
static NSString skey = new NSString("About_Image");
AboutModel about;
UIImage image;
public About_Image(AboutModel about)
: base(string.Empty)
{
this.about = about;
FileInfo imageFile = App.LibraryFile(about.Image ?? "filler.png");
if (imageFile.Exists)
{
float size = 240;
image = UIImage.FromFile(imageFile.FullName);
var resizer = new ImageResizer(image);
resizer.Resize(size, size);
image = resizer.ModifiedImage;
}
}
public override UITableViewCell GetCell(UITableView tv)
{
var cell = tv.DequeueReusableCell(skey);
if (cell == null)
{
cell = new UITableViewCell(UITableViewCellStyle.Default, skey)
{
SelectionStyle = UITableViewCellSelectionStyle.None,
Accessory = UITableViewCellAccessory.None,
};
}
if (null != image)
{
cell.ImageView.ContentMode = UIViewContentMode.Center;
cell.ImageView.Image = image;
}
return cell;
}
public float GetHeight(UITableView tableView, NSIndexPath indexPath)
{
float height = 100;
if (null != image)
height = image.Size.Height;
return height;
}
public override void Selected(DialogViewController dvc, UITableView tableView, NSIndexPath indexPath)
{
//base.Selected(dvc, tableView, path);
tableView.DeselectRow(indexPath, true);
}
}
#miquel
The current idea of a workflow is an app that starts with a jpg of the Default.png that fades into the first view, with a flow control button(s) that would move to the main app. This view, which I had working previous to M.T.D. (MonoTouch.Dialog), which is a table of text rows with an image. When each row is clicked, it moves to another view that has the row/text in more detail.
The app also supports in-app-purchasing, so if the client wishes to purchase more of the product, then switch to another view to transact the purchase(s). This part was the main reason for switching to M.T.D., as I thought M.T.D. would be perfect for it.
Lastly there would be a settings view to re-enable purchases, etc.
PS How does one know when the app is un-minimized? We would like to show the fade in image again.
I have been asking myself the same questions. I've used the Funq Dependency Injection framework and I create a new DialogViewController for each view. It's effectively the same approach I've used previously developing ASP.NET MVC applications and means I can keep the controller logic nicely separated. I subclass DialogViewController for each view which allows me to pass in to the controller any application data required for that particular controller. I'm not sure if this is the recommended approach but so far it's working for me.
I too have looked at the TweetStation application and I find it a useful reference but the associated documentation specifically says that it isn't trying to be an example of how to structure a MonoTouch application.
I use option 2 that you stated as well, it works pretty nicely as you're able to edit the toolbar options on a per-root-view basis and such.
Option 2 is more feasible, as it also gives you more control on each DialogViewController. It can also helps if you want to conditionally load the view.