I have trouble with my Java application. I'm writing a program that connects to public transport API and perform some operations, which includes showing map of Warsaw with bus stops. I want to add an EventHandler function that allows to tap on a bus stop on the map, which will result in showing a box with some informations about this bus stop. How can I do such a thing?
My application so far:
Main.java:
package gui;
import api.Api;
import com.gluonhq.charm.down.ServiceFactory;
import com.gluonhq.charm.down.Services;
import com.gluonhq.charm.down.plugins.StorageService;
import com.gluonhq.maps.MapPoint;
import com.gluonhq.maps.MapView;
import com.gluonhq.maps.demo.PoiLayer;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import java.io.File;
import java.util.*;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import javax.swing.*;
public class Main extends Application{
private ContentType currentContent = ContentType.SCHEDULE;
private HashMap<ContentType, Pane> contentPaneMap;
private HBox buttonBox;
private Stage stage;
private Theme theme;
private final int height = 500;
private final int width = 800;
private final ToggleGroup menuButtonToggle = new ToggleGroup();
private String selectedStopId;
#Override
public void start(Stage primaryStage) {
this.stage = primaryStage;
theme = Theme.DARK;
buttonBox = new HBox();
buttonBox.getChildren().addAll(getMenuButtons());
initContentPanes();
getContentPaneAndResetStage();
primaryStage.show();
}
private void getContentPaneAndResetStage(){
Pane contentPane = contentPaneMap.get(currentContent);
VBox rootPane = new VBox();
rootPane.getChildren().addAll(buttonBox, contentPane);
Scene scene = new Scene(rootPane, width, height);
scene.getStylesheets().add(theme.cssFile);
stage.setScene(scene);
}
private List<ToggleButton> getMenuButtons(){
List<ToggleButton> buttonList = new ArrayList<>();
for(ContentType contentType:ContentType.values()){
ToggleButton button = new ToggleButton(contentType.buttonText);
button.setPrefWidth((double) width/4);
button.setOnAction(e -> {
Main.this.currentContent = contentType;
getContentPaneAndResetStage();
});
buttonList.add(button);
button.setToggleGroup(Main.this.menuButtonToggle);
}
return buttonList;
}
private void initContentPanes(){
contentPaneMap = new HashMap<>();
Api.saveLocalisationToCache();
contentPaneMap.put(ContentType.MAP, getMapPane());
contentPaneMap.put(ContentType.SCHEDULE, getSchedulePane());
contentPaneMap.put(ContentType.ROUTE, getRoutePane());
contentPaneMap.put(ContentType.SETTINGS, getSettingsPane());
}
private Pane getSchedulePane(){
VBox schedulePane = new VBox();
Label stopNameLabel = new Label("Nazwa przystanku: ");
stopNameLabel.setPadding(new Insets(5));
TextField stopName = new TextField();
stopName.setOnAction(e -> {
List<String> stopId = Api.getId(stopName.getText());
selectedStopId = null;
schedulePane.getChildren().remove(1);
schedulePane.getChildren().add(getContentForSchedulePane(stopId, stopName.getText()));
});
schedulePane.getChildren().add(new HBox(stopNameLabel, stopName));
if (selectedStopId == null) schedulePane.getChildren().add(new Pane(new Label("Nie znaleziono przystanku")));
else schedulePane.getChildren().add(new Label(selectedStopId));
return schedulePane;
}
private Pane getContentForSchedulePane(List<String> stopId, String stopName){
if (stopId.size() == 0) return new Pane(new Label("Nie znaleziono przystanku"));
if (stopId.size() == 1) {
String stop1id = stopId.get(0);
Label stopNameLabel = new Label("Przystanek " + stopName.toUpperCase() + " (id " + stop1id + ")");
stopNameLabel.setPadding(new Insets(5));
VBox newContentPane = new VBox(stopNameLabel);
ChoiceBox<String> busStopNr = new ChoiceBox<>(
FXCollections.observableArrayList(List.of(new String[]{"01", "02"})));
busStopNr.setValue("01");
ChoiceBox<String> lineChoice = new ChoiceBox<>(
FXCollections.observableArrayList(Api.getLines(stop1id, busStopNr.getValue())));
Label times = new Label();
lineChoice.setOnAction(
e -> times.setText(Api.getTimes(stop1id, busStopNr.getValue(), lineChoice.getValue()).toString()));
busStopNr.setOnAction(
e -> lineChoice.setItems(
FXCollections.observableArrayList(Api.getLines(stop1id, busStopNr.getValue()))));
newContentPane.getChildren().addAll(
new HBox(new Label("Nr słupka: "), busStopNr),
new HBox(new Label("Nr linii: "), lineChoice),
times);
return newContentPane;
}
GridPane newButtonPane = new GridPane();
int i = 1; int j = 0;
for (String id:stopId) {
Button b = new Button(id);
b.setOnAction(event -> {
selectedStopId = b.getText();
contentPaneMap.get(ContentType.SCHEDULE).getChildren().remove(1);
contentPaneMap.get(ContentType.SCHEDULE).getChildren()
.add(getContentForSchedulePane(Collections.singletonList(b.getText()), stopName));
});
((GridPane) newButtonPane).add(b, i, j);
i = (i+1)%4+1; j = i==1?j+1:j;
}
return newButtonPane;
}
private Pane getRoutePane(){return new VBox(new Circle(20, Color.BLUE));}
private Pane getMapPane(){
MapView mapView = new MapView();
PoiLayer poiLayer = new PoiLayer();
List<Map<String, String>> pointList = Api.getLocalization();
for (Map<String, String> stop: pointList){
MapPoint point = new MapPoint(Double.parseDouble(stop.get("szer_geo")), Double.parseDouble(stop.get("dlug_geo")));
poiLayer.addPoint(point, new Circle(3, Color.RED));
}
mapView.setCenter(new MapPoint(52.230926, 21.006701));
mapView.setZoom(13);
mapView.addLayer(poiLayer);
return new StackPane(mapView);
}
public void getInfo(){
}
private Pane getSettingsPane(){
GridPane settingsPane = new GridPane();
ChoiceBox<Theme> themeChoiceBox = new ChoiceBox<>(FXCollections.observableArrayList(Theme.values()));
themeChoiceBox.setOnAction(e -> {
Main.this.theme = themeChoiceBox.getValue();
getContentPaneAndResetStage();
});
Label themeLabel = new Label("Motyw: ");
themeLabel.setPadding(new Insets(5));
settingsPane.add(themeLabel, 1, 1);
settingsPane.add(themeChoiceBox, 2, 1);
settingsPane.setHgap(10);
settingsPane.setVgap(10);
settingsPane.setGridLinesVisible(false);
return settingsPane;
}
#Override
public void init() {
System.setProperty("javafx.platform", "Desktop");
System.setProperty("http.agent", "Gluon Mobile/1.0.1");
StorageService storageService = new StorageService() {
#Override
public Optional<File> getPrivateStorage() {
return Optional.of(new File(System.getProperty("user.home")));
}
#Override
public Optional<File> getPublicStorage(String s) {
return getPrivateStorage();
}
#Override
public boolean isExternalStorageWritable() {
return getPrivateStorage().isPresent() && getPrivateStorage().get().canWrite();
}
#Override
public boolean isExternalStorageReadable() {
return getPrivateStorage().isPresent() && getPrivateStorage().get().canRead();
}
};
ServiceFactory<StorageService> storageServiceServiceFactory = new ServiceFactory<>() {
#Override
public Class<StorageService> getServiceType() {
return StorageService.class;
}
#Override
public Optional<StorageService> getInstance() {
return Optional.of(storageService);
}
};
Services.registerServiceFactory(storageServiceServiceFactory);
}
}
api.java:
package api;
import javafx.application.Platform;
import org.json.JSONArray;
import org.json.JSONObject;
import java.io.*;
import java.net.*;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Api {
private static final String baseUrl = "https://api.um.warszawa.pl/api/action/";
private static final String apikey = "95904037-5fdc-48d5-bd7f-c9f8d0b28947";
private static final String pathToLocalisationCache = "./.cache/stop-localisation.json";
private static HttpURLConnection getConnection(String urlString){
URL url = null;
HttpURLConnection connection = null;
try {
url = new URL(urlString);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
assert url != null;
connection = (HttpURLConnection)url.openConnection();
} catch (IOException e) {
e.printStackTrace();
}
return connection;
}
//Współrzędne przystanków
public static List<Map<String,String>> getLocalization() {
File cacheFile = new File(pathToLocalisationCache);
String data;
if(!cacheFile.exists()){
String url = baseUrl+"dbstore_get?id=ab75c33d-3a26-4342-b36a-6e5fef0a3ac3&apikey="+apikey;
HttpURLConnection connection = Api.setParameters(getConnection(url));
data = Api.readData(connection);
} else{
data = readLocalisationFromCache();
}
List<Map<String,String>> list = new ArrayList<>();
assert data != null;
JSONObject obj = new JSONObject(data);
JSONArray arr = obj.getJSONArray("result");
for(int j=0; j<arr.length();j++){
JSONObject obj1 = arr.getJSONObject(j);
JSONArray arr1 = obj1.getJSONArray("values");
Map<String, String> map = new HashMap<>();
for(int i = 0; i < arr1.length();i++){
String value = arr1.getJSONObject(i).getString("value");
String key = arr1.getJSONObject(i).getString("key");
map.put(key, value);
}
list.add(map);
}
return list;
}
public static void saveLocalisationToCache(){
File file = new File(pathToLocalisationCache);
if (file.exists()) return;
try{
boolean fileCreated = true;
if (!file.getParentFile().exists()) fileCreated = file.getParentFile().mkdir();
if (!fileCreated) throw new IOException("Unable to create cache directory");
fileCreated = file.createNewFile();
if (!fileCreated) throw new IOException("Unable to create file");
String url = baseUrl+"dbstore_get?id=ab75c33d-3a26-4342-b36a-6e5fef0a3ac3&apikey="+apikey;
HttpURLConnection connection = setParameters(getConnection(url));
InputStreamReader in = new InputStreamReader(new BufferedInputStream(connection.getInputStream()), StandardCharsets.UTF_8.newDecoder());
OutputStreamWriter out = new OutputStreamWriter(new BufferedOutputStream(new FileOutputStream(file)), StandardCharsets.UTF_8.newEncoder());
in.transferTo(out);
in.close(); out.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static String readLocalisationFromCache(){
try{
BufferedReader reader = new BufferedReader(new FileReader(pathToLocalisationCache));
StringBuilder dataSB = new StringBuilder();
reader.lines().forEach(dataSB::append);
reader.close();
return dataSB.toString();
} catch (IOException e){e.printStackTrace();}
return null;
}
//id przystanku po nazwie
public static List<String> getId(String n) {
StringBuilder name = new StringBuilder();
try {
String[] testStrings = {n};
for (String s : testStrings) {
String encodedString = URLEncoder.encode(s, StandardCharsets.UTF_8);
name.append(encodedString);
}
} catch(Exception e){e.printStackTrace();}
String url = baseUrl+"dbtimetable_get?id=b27f4c17-5c50-4a5b-89dd-236b282bc499&name="+name+"&apikey="+apikey;
HttpURLConnection connection = Api.setParameters(getConnection(url));
String data = Api.readData(connection);
assert data != null;
JSONObject json = new JSONObject(data);
Pattern integerPattern = Pattern.compile("-?\\d+");
Matcher matcher = integerPattern.matcher(json.toString());
List<String> linesList = new ArrayList<>();
while (matcher.find()) {
linesList.add(matcher.group());
}
return linesList;
}
// Zwraca liste linii dla konkretnego przystanku i nr slupka
public static List<String> getLines(String idPrzystanku, String nrSlupka) {
String url = baseUrl+"dbtimetable_get?id=88cd555f-6f31-43ca-9de4-66c479ad5942&busstopId="+
idPrzystanku+"&busstopNr="+nrSlupka+"&apikey="+apikey;
HttpURLConnection connection = Api.setParameters(getConnection(url));
String data = Api.readData(connection);
assert data != null;
JSONObject json = new JSONObject(data);
Pattern integerPattern = Pattern.compile("-?\\d+");
Matcher matcher = integerPattern.matcher(json.toString());
List<String> linesList = new ArrayList<>();
while (matcher.find()) {
linesList.add(matcher.group());
}
return linesList;
}
//Zwraca listę czas dla danego przystanku i linii
public static List<String> getTimes(String idPrzystanku, String nrSlupka, String line) {
String url = baseUrl+"dbtimetable_get?id=e923fa0e-d96c-43f9-ae6e-60518c9f3238&busstopId="+
idPrzystanku+"&busstopNr="+nrSlupka+"&line="+line+"&apikey="+apikey;
HttpURLConnection connection = Api.setParameters(getConnection(url));
String data = Api.readData(connection);
List<String> times = new ArrayList<>();
assert data != null;
JSONObject obj = new JSONObject(data);
JSONArray arr = obj.getJSONArray("result");
for(int j=0; j<arr.length();j++){
JSONObject obj1 = arr.getJSONObject(j);
JSONArray arr1 = obj1.getJSONArray("values");
JSONObject obj2 = arr1.getJSONObject(5);
times.add(obj2.getString("value"));
}
return times;
}
//Odczytuje dane
public static String readData(HttpURLConnection connection) {
InputStream inStream;
try {
inStream = new BufferedInputStream(connection.getInputStream());
} catch (IOException e) {
e.printStackTrace();
return null;
}
Scanner in = new Scanner(inStream, StandardCharsets.UTF_8);
StringBuilder sb = new StringBuilder();
while (in.hasNext()) {
sb.append(in.next());
}
return sb.toString();
}
//Ustala parametry połączenia
public static HttpURLConnection setParameters(HttpURLConnection
connection) {
try {
connection.setRequestMethod("GET");
connection.setDoInput(true);
} catch (ProtocolException e) {
e.printStackTrace();
}
connection.setRequestProperty("Authorization", "Token " + apikey);
try {
if (connection.getResponseCode() != 200) {
System.out.println("Response code: "
+ connection.getResponseCode() + " " + connection.getResponseMessage());
Platform.exit(); // ze względu na javafx
System.exit(0);
}
} catch (IOException e) {
e.printStackTrace();
}
return connection;
}
}
I have no idea how to do it and I will be very grateful if someone will help me.
Based on my work experience on map libraries with JavaFX, I can share an approach you can take here. You can simply add a Mouse click event handler on the MapView and in that event you can catch the coordinates/Point where the user clicks on the screen. Then you can compare that point clicked by the user with one of the location Map points you want your user to click and see if it matches (by checking a distance between the user click position and the map coordinate of the bus stop). I have applied this approach in a different map library but similar can be applied here with some tweaks and adjustments.
List<Map<String, String>> pointList = Api.getLocalization();
mapView.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent mouseEvent) {
Point2D clickedMapCoordinates = mapView.screenToLocal(new Point2D(mouseEvent.getX(), mouseEvent.getY()));
for (Map<String, String> stop: pointList){
MapPoint stopPoint = new MapPoint(Double.parseDouble(stop.get("szer_geo")), Double.parseDouble(stop.get("dlug_geo")));
Point2D mapStopPoint = new Point2D(stopPoint.getLongitude(), stopPoint.getLatitude());
// if user clicked on map near the position(lat,lng) of a stop
// then trigger the logic, you can change the distance threshold value according to your need
if(mapStopPoint.distance(clickedMapCoordinates) < 0.0001)
{
// perform your logic here about the stop point point...
}
}
}
});
Another approach which I suppose you can take is put a click event handler on the Circle object for the bus stop point and then check if the user's clicked circle matches the coordinates of a bus stop point.
Circle circle = new Circle(3, Color.RED);
circle.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent mouseEvent) {
if(mouseEvent.getSource() instanceof Circle)
{
Circle clickedCircle = (Circle) mouseEvent.getSource();
Point2D clickedPoint = mapView.screenToLocal(clickedCircle.getCenterX(), clickedCircle.getCenterY())
for (Map<String, String> stop: pointList){
MapPoint point = new MapPoint(Double.parseDouble(stop.get("szer_geo")), Double.parseDouble(stop.get("dlug_geo")));
if(clickedPoint.getX() == point.getLongitude() && clickedPoint.getY() == point.getLatitude())
{
// this is the clicked map point (bus stop point)
// perform your logic here
}
}
}
}
});
If the second approach doesn't work, try debugging and checking the clicked point and bus stop point coordinates values and adjust them. Hope this helps you in some way.
Related
I have a method which performs some task(reading, writing files and other tasks also) for almost 3 minutes.
I want to bind progress bar in javafx which can run with progress of the method.
This is my method
System.out.println("Going to load contract/security:"+new Date());
Map<Integer,FeedRefData> map = loadContractAndSecurityFromFile(loadFO);
addIndicesRefData(map);
BufferedWriter writer = createFile();
for (FeedRefData feedRefData : map.values()) {
try {
updateInstrumentAlias(map, feedRefData);
String refDataString = feedRefData.toString();
writer.write(refDataString, 0, refDataString.length());
writer.newLine();
writer.flush();
} catch (IOException e) {
e.printStackTrace();
log.info("Unable to write Quote Object to : " );
}
}
System.out.println("Ref Data File Generated:"+new Date());
For bind your method with progressbar you should do these steps :
Create a task which contains your method.
Create a thread which run this task.
Bind your progress property with your task property.
I made this simple example ,just change my code with your method code :
public class Bind extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
ProgressBar pb = new ProgressBar();
pb.setProgress(1.0);
Button button = new Button("start");
button.setOnAction((ActionEvent event) -> {
/*Create a task which contain method code*/
Task<Void> task = new Task<Void>() {
#Override
protected Void call() throws Exception {
File file = new File("C:\\Users\\Electron\\Desktop\\387303_254196324635587_907962025_n.jpg");
ByteArrayOutputStream bos = null;
try {
FileInputStream fis = new FileInputStream(file);
byte[] buffer = new byte[1024];
bos = new ByteArrayOutputStream();
for (int len; (len = fis.read(buffer)) != -1;) {
bos.write(buffer, 0, len);
updateProgress(len, file.length());
/* I sleeped operation because reading operation is quiqly*/
Thread.sleep(1000);
}
System.out.println("Reading is finished");
} catch (FileNotFoundException e) {
System.err.println(e.getMessage());
} catch (IOException e2) {
System.err.println(e2.getMessage());
}
return null;
}
};
Thread thread = new Thread(task);
thread.start();
/*bind the progress with task*/
pb.progressProperty()
.bind(task.progressProperty());
});
HBox box = new HBox(pb, button);
Stage stage = new Stage();
StackPane root = new StackPane();
root.getChildren().add(box);
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
}
Operation started :
Operation finished :
PS: I used Thread.sleep(1000) because my file is so small.You can remove it if your progress time is long.
How to restore an ImageView picked from gallery after close and restart the app. I am using SharedPreferences. To save the state of the URI after the app is closed, however it is not working the image is not set again any help would be appreciate.
public class test extends AppCompatActivity {
private static int RESULT_LOAD_IMAGE = 1;
ImageButton buttonLoadImage;
private static int RESULT_LOAD_IMG = 1;
String imgDecodableString;
public String getImagePathFetch;
ImageView imgView;
public String keyImage = "myImage";
public SharedPreferences sharedPrefEnter, sharedPrefGet;
Intent galleryIntent;
Uri selectedImage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity_layout);
imgView = (ImageView) findViewById(R.id.imageView1);
sharedPrefGet = PreferenceManager.getDefaultSharedPreferences(this);
getImagePathFetch = sharedPrefGet.getString(keyImage, "");
if (!getImagePathFetch.equals("")) {
// tToast("OnCreate Path=" + getImagePathFetch);
Uri uri;
uri = Uri.parse(getImagePathFetch);
imgView.setImageURI(uri);
}
buttonLoadImage = (ImageButton) findViewById(R.id.buttonLoadPicture);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AddImage(view);
}
});
}
public void AddImage(View view) {
galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// Start the Intent
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// When an Image is picked
if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK && null != data) {
// Get the Image from data
selectedImage = data.getData();
sharedPrefEnter = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = sharedPrefEnter.edit();
editor.putString(keyImage, selectedImage.toString());
editor.commit();
Uri uri = Uri.parse(selectedImage.toString());
imgView.setImageURI(uri);
}
}
}
// get the path of the image
sharedPrefGet = PreferenceManager.getDefaultSharedPreferences(this);
getImagePathFetch = sharedPrefGet.getString(keyImage, "");
if (!getImagePathFetch.equals("")) {
// tToast("OnCreate Path = " + getImagePathFetch); //TESTING
// parse path from toString to uri
uriImage = Uri.parse(getImagePathFetch);
// explicitly check for the permission at runtime since API 23
int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
// Permission not granted
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE },
WRITE_EXTERNAL_STORAGE);
} else // Permission granted
{
InputStream imageStream = null;
try {
imageStream = getContentResolver().openInputStream(uriImage);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Bitmap yourSelectedImage = BitmapFactory.decodeStream(imageStream);
Bitmap imageResized = getResizedBitmap(yourSelectedImage, 480, 480); // resized
// Image
imgView.setImageBitmap(imageResized);
} // end if
}
//Check permission result.
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions,
#NonNull int[] grantResults) {
switch (requestCode) {
case WRITE_EXTERNAL_STORAGE:
if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
InputStream imageStream = null;
try {
imageStream = getContentResolver().openInputStream(uriImage);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Bitmap yourSelectedImage = BitmapFactory.decodeStream(imageStream);
Bitmap imageResized = getResizedBitmap(yourSelectedImage, 480, 480); // resized
// Image
imgView.setImageBitmap(imageResized);
}
break;
default:
break;
}
}
I'm asking for your help.
I'm developing an application in JavaFX who "scan" Mp3 files to get ID3tag.
Here is my problem. I did a foreach loop of a list for every .mp3 found but I'd like to increment a label which inform the progression of the list.
Here is my code
private ArrayList checkMp3File(ArrayList<String> lsMp3file, String sDir) throws UnsupportedTagException, InvalidDataException, IOException
{
this.currentData = 1;
int size = lsMp3file.size();
ArrayList<DataSong> lsds = new ArrayList<>();
for(String mp3file : lsMp3file)
{
this.labelUpdate.setText(this.current++ + " of " + " size");
DataSong ds = new DataSong();
Mp3File mp3 = new Mp3File(mp3file);
ds.setLenghtOfMp3inSec(mp3.getLengthInSeconds());
ds.setBitRateOfMp3(mp3.getBitrate());
ds.setSampleRate(mp3.getSampleRate());
ds.setVbrOrCbr(mp3.isVbr());
}
Actually, when the loop progress my window interface is completely freeze.
And only when the loop is finished, the label updated.
Someone can explain why ?
I already thank you for your answers.
EDIT :
Here is my fully code
public class LaunchOption extends Pane {
private final HBox launchAndSend = new HBox();
private final HBox browseAndField = new HBox();
private final HBox jsonAndAdvance = new HBox();
private ArrayList<DataSong> lsWithData = new ArrayList<>();
private String sendJson;
private File selectedDirectory;
private User user;
private int currentData;
private final ProgressIndicator pi = new ProgressIndicator(0);
private final VBox containerElement = new VBox();
private final TextArea displayJson = new TextArea();
private final TextField pathDir = new TextField();
private final TextField nbrOfData = new TextField();
private final Button btnScan = new Button();
private final Button btnSend = new Button();
private final Button btnCheckJson = new Button();
private final Button btnDirectoryBrowser = new Button();
private final Label nbMp3 = new Label();
public Label listAdvance = new Label();
private final Stage home;
public LaunchOption(Stage home){
this.home = home;
configureBtnCheckJson();
configureBtnScan();
configureBtnSend();
configureLabelMp3();
configureBtnDirectoryBrowser();
configureTextAreaDisplayJson();
configureTextFieldPathDir();
configureTextFieldNbDataMp3();
configureHBoxlaunchSend();
configureHBoxBrowseAndField();
configureHBoxJsonAndAdvance();
configureContainer();
this.getChildren().addAll(containerElement,launchAndSend);
}
private void configureLabelMp3()
{
nbMp3.setText("MP3");
}
private void configureBtnScan(){
btnScan.setText("Scan");
btnScan.setOnAction(event->{
ArrayList<String> Mp3FileData;
Mp3FileData = mapFilesMp3(selectedDirectory.getAbsolutePath());
System.out.println("ListSize = " + Mp3FileData.size());
nbrOfData.setText(String.valueOf(Mp3FileData.size()));
try {
lsWithData = checkMp3File(Mp3FileData, selectedDirectory.getAbsolutePath());
} catch (UnsupportedTagException ex) {
Logger.getLogger(MusiScanMp3agic.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidDataException ex) {
Logger.getLogger(MusiScanMp3agic.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(MusiScanMp3agic.class.getName()).log(Level.SEVERE, null, ex);
}
pi.setProgress(1);
});
}
private void configureBtnDirectoryBrowser(){
btnDirectoryBrowser.setText("Browse ...");
btnDirectoryBrowser.getStyleClass().add("round-red");
btnDirectoryBrowser.setOnAction(event-> {
DirectoryChooser dc = new DirectoryChooser();
selectedDirectory = dc.showDialog(home);
pi.setProgress(0.35);
if(selectedDirectory == null)
{
pathDir.setText("No directory selected");
}
else
{
pathDir.setText(selectedDirectory.getAbsolutePath());
String Text = pathDir.getText();
System.out.println(Text.toString());
}
});
}
private static String regexMp3()
{
return "^.*\\.(mp3)$";
}
private ArrayList mapFilesMp3(String sDir){
ArrayList<String> ls = new ArrayList<>();
printFnames(sDir,ls);
return ls;
}
private static void printFnames(String sDir, ArrayList<String> ls)
{
File[] faFiles = new File(sDir).listFiles();
for(File file : faFiles)
{
if(file.getName().matches(regexMp3()))
{
// System.out.println(file.getAbsolutePath());
ls.add(file.getAbsolutePath());
}
if(file.isDirectory())
{
printFnames(file.getAbsolutePath(), ls);
}
}
}
private ArrayList checkMp3File(ArrayList<String> lsMp3file, String sDir) throws UnsupportedTagException, InvalidDataException, IOException
{
this.currentData = 1;
int size = lsMp3file.size();
ArrayList<DataSong> lsds = new ArrayList<>();
for(String mp3file : lsMp3file)
{
System.out.println(this.currentData++);
DataSong ds = new DataSong();
Mp3File mp3 = new Mp3File(mp3file);
ds.setLenghtOfMp3inSec(mp3.getLengthInSeconds());
ds.setBitRateOfMp3(mp3.getBitrate());
ds.setSampleRate(mp3.getSampleRate());
ds.setVbrOrCbr(mp3.isVbr());
if(mp3 != null){
ds.setAbsoluteLocation(mp3.getFilename());
ds.setLocation(removeSDir(mp3.getFilename(), sDir));
if(mp3.hasId3v2Tag())
{
ID3v2 id3v2Tag = mp3.getId3v2Tag();
if(!(id3v2Tag.getArtist() == null))
{
ds.setArtist(id3v2Tag.getAlbumArtist());
}
if(!(id3v2Tag.getAlbum() == null))
{
ds.setAlbum((id3v2Tag.getAlbum()));
}
if(!(id3v2Tag.getTitle() == null))
{
ds.setTitle(id3v2Tag.getTitle());
}
if(!(id3v2Tag.getTrack() == null))
{
ds.setTrackOnAlbum(id3v2Tag.getTrack());
}
if(!(id3v2Tag.getYear() == null) && !(id3v2Tag.getYear().isEmpty()))
{
ds.setYearReleased(id3v2Tag.getYear());
}
if(!(id3v2Tag.getGenreDescription() == null))
{
ds.setGenre(id3v2Tag.getGenreDescription());
}
if(!(id3v2Tag.getComposer() == null))
{
ds.setComposer(id3v2Tag.getComposer());
}
if(!(id3v2Tag.getPublisher() == null))
{
ds.setPublisher(id3v2Tag.getPublisher());
}
if(!(id3v2Tag.getOriginalArtist() == null))
{
ds.setOriginArtist(id3v2Tag.getOriginalArtist());
}
if(!(id3v2Tag.getAlbumArtist() == null))
{
ds.setAlbumArtString(id3v2Tag.getAlbumArtist());
}
if(!(id3v2Tag.getCopyright() == null))
{
ds.setCopyright(id3v2Tag.getCopyright());
}
if(!(id3v2Tag.getUrl() == null))
{
ds.setUrl(id3v2Tag.getUrl());
}
}
}
lsds.add(ds);
}
return lsds;
}
I presume that what I should do is to make my checkMp3File method into a Task method which will do a background thread ?
There is not enough code to be sure but I think you are probably calling your method on the JavaFX application thread which then blocks your UI.
You should read the documentation about concurrency in JavaFX.
https://docs.oracle.com/javase/8/javafx/interoperability-tutorial/concurrency.htm
I'd like to re-use a dialog class for data manipulation. The data will be retrieved from database. It depends on which table the class retrieve the data from, the size of the table columns is not fixed, so I can't declare column variables. After users update data, I would like to convert the input data using setResultConverter but do not know how to refer to the variable, since the program generates TextFields dynamically. Please help. Here is the the code.
public class AddDialog {
private Dialog<DBtable> dialog = new Dialog<DBtable>();
private ButtonType saveBtn;
//database variables
private Connection connect; // = null;
private String dbTblName;
//gridpane content variables
private GridPane contentPane = new GridPane();
private HashMap<String, TextField> fieldMap =
new HashMap<String, TextField>();
private ArrayList<String> dataList = new ArrayList<String>();
public AddDialog (String title, String header, String dbTable) {
this.dbTblName = dbTable;
dialog.setTitle(title);
dialog.setHeaderText(header);
saveBtn = new ButtonType("Save", ButtonData.OK_DONE);
dialog.getDialogPane().getButtonTypes().addAll(saveBtn,
ButtonType.CANCEL);
dialog.getDialogPane().setContent(getLayout(dbTable));
Optional<DBtable> result = dialog.showAndWait();
result.ifPresent(data -> {
System.out.println(" data="+data+" 0="+data.getID()+
" 1="+data.getField1());
});
} // constructor ends
public GridPane getLayout(String dbTable) {
String sql = "select column_name, description ";
sql += "from syscolumn_description ";
sql += "where table_name = \'" + dbTable + "\'";
String fieldLabel, fieldCol;
ResultSet ds = null;
// retrieve meta data from database
connect = DBConnect.getConnect(connect);
try {
Statement labelStmnt = connect.createStatement();
ds = labelStmnt.executeQuery(sql);
int row = 0;
while (ds.next()) {
row += 2;
//label....column=0 row=row+2;
fieldLabel = ds.getString("DESCRIPTION");
contentPane.add(new Text(fieldLabel), 0, row);
//textField...column=1 row=row+2;
contentPane.add(new TextField(), 1, row);
fieldCol = ds.getString("COLUMN_NAME");
fieldMap.put(fieldCol, new TextField());
} // while result set loop ends
} catch (Exception e) {
e.printStackTrace();
} finally {
try {if(ds != null) ds.close();} catch (Exception e) {};
}
// convert result
dialog.setResultConverter(dialogButton -> {
if (dialogButton == saveBtn) {
int i=0;
for (Map.Entry<String, TextField> e : fieldMap.entrySet()) {
dataList.add(e.getValue().getText());
i++;
System.out.println("col="+e.getKey()+
" data="+e.getValue().getText());
} // map loop end
return new DBtable(dataList, i);
}
return null;
});
return contentPane;
} //getLayout ends
} // AddDialog ends
I'm doing an app with Xamarin iOS.
I put a UITableView on XCode, so that when I click on a button, it retrieves from the database and slot it in. I'm able to put it onto a row, but couldn't figure it out how to have multiple rows of data in it. This is my partial code from which I'm able to display a row of data.
cmd.CommandType = CommandType.Text;
dr = cmd.ExecuteReader();
while (dr.Read())
{
var table = new UITableView(this.retrieveData.Frame);
string[] tableItems = new String[] {dr["admin_num"] + ", " + dr["name"]};
table.Source = new TableSource(tableItems);
Add (table);
}
You are creating a completely new TableView for each row in your data. Instead, you should loop through your data and create a data structure (List, array, etc) containing ALL of the data you want to display, and then pass that data to your TableView/Source.
cmd.CommandType = CommandType.Text;
dr = cmd.ExecuteReader();
// you will need a class mydata with Num and Name properties
List<mydata> data = new List<mydata>();
while (dr.Read())
{
data.Add(new mydata { Num = dr["admin_num"], Name = dr["name"] });
}
dr.Close();
var table = new UITableView(this.retrieveData.Frame);
table.Source = new TableSource(data);
Add (table);
What you need to do is this:
public List<DemoClass> getDemoClassList()
{
List<DemoClass> lstDemoClass;
DemoClass objDemoClass;
try
{
String strCommandText;
strCommandText = "SELECT * FROM DemoClass ";
command = new SqliteCommand(strCommandText, connection);
lstDemoClass = new List<DemoClass>();
using (var reader = command.ExecuteReader())
{
while (reader.Read())
{
objDemoClass = new Homes(false);
objDemoClass.ID = Convert.ToInt32(reader[0]);
objDemoClass.Name = Convert.ToString(reader[1]);
lstDemoClass.Add(objDemoClass);
}
}
return lstDemoClass;
}
catch (Exception ex)
{
throw ex;
}
finally
{
command.Dispose();
command = null;
lstDemoClass = null;
objDemoClass = null;
}
}
public void BindList()
{
List<DemoClass> lstDemoClass = new List<DemoClass>();
DemoClass hm = new DemoClass();
lstDemoClass = (List<DemoClass>)hm.getDemoClassList();
TableViewDataSource tdatasource = new TableViewDataSource(this, lstDemoClass);
table.Hidden = false;
table.DataSource = tdatasource;
table.Delegate = new TableViewDelegate(this, table, lstDemoClass);
table.ReloadData();
}
The getDemoClassList() will give the retrieved list from SQLite table, and later you can bind the list to the table datasource.
UPDATE:
As per your request I have updated my comment with the code for datasource and its delegate classes.
Now in this same class you need to add the following subclasses:
#region TableDelegate
public class TableViewDelegate : UITableViewDelegate
{
private DemoPageViewController _Controller;
private List<DemoClass> lst;
public TableViewDelegate(DemoPageViewController controller ,UITableView tableView, List<DemoClass> tblList)
{
try
{
this._Controller = controller;
this.lst = tblList;
}
catch(Exception ex)
{
}
}
public override void RowSelected (UITableView tableView, NSIndexPath indexPath)
{
try
{
//This loads the activity spinner till the selection code is completed
_Controller._loadPop = new LoadingOverlay (new System.Drawing.RectangleF(0,0,_Controller.View.Frame.Width,_Controller.View.Frame.Height),"Loading...");
_Controller.View.Add ( _Controller._loadPop );
// spin up a new thread to do some long running work using StartNew
Task.Factory.StartNew (
// tasks allow you to use the lambda syntax to pass work
() => {
InvokeOnMainThread(delegate{
DemoClass f = lst[indexPath.Row];
//Add your code here, usually some navigation or showing a popup
});
}).ContinueWith(t => InvokeOnMainThread(() => {
//Hide the activity spinner
_Controller._loadPop.Hide();
}));
}
catch(Exception ex)
{
}
finally
{
}
}
}
#endregion
#region TableDataSource
private class TableViewDataSource : UITableViewDataSource
{
static NSString kCellIdentifier = new NSString("MyIdentifier");
private List<DemoClass> lst;
private DemoPageViewController controller;
public TableViewDataSource (DemoPageViewController controller ,List<DemoClass> tblLst)
{
this.controller = controller;
this.lst = tblLst;
}
public override int NumberOfSections (UITableView tableView)
{
return 1;
}
public override int RowsInSection (UITableView tableView, int section)
{
return lst.Count;
}
// Override to support conditional editing of the table view.
public override bool CanEditRow (UITableView tableView, MonoTouch.Foundation.NSIndexPath indexPath)
{
// Return false if you do not want the specified item to be editable.
return false;
}
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
try
{
UITableViewCell cell = tableView.DequeueReusableCell (kCellIdentifier);
if (cell == null)
{
cell = new UITableViewCell (UITableViewCellStyle.Subtitle, kCellIdentifier);
cell.Tag = Environment.TickCount;
}
DemoClass objDemo = lst[indexPath.Row];
cell.Accessory = UITableViewCellAccessory.DisclosureIndicator;
cell.ImageView.Image = UIImage.FromFile("Images/CameraImg.png");
cell.DetailTextLabel.Text = "Show some detail: " + objDemo.DemoDescription.ToString();
cell.TextLabel.Text = "Some Title: " + objDemo.DemoTitle.ToString();
return cell;
}
catch(Exception ex)
{
return null;
}
finally
{
}
}
}
#endregion
Hope it helps.