I have removed all of the code besides the JFrame stuff so it would be easier to see. I want to be able to click a JButton, and that should take me to an existing JFrame in another class. I will provide two classes below. I added the action listener however it does nothing.
package testjframe;
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/**
*
*
*/
public class TestJframe
{
public static void main(String[] args)
{
JFrame P1Frame = new JFrame ( "Project 1" );
P1Frame.pack();
P1Frame.getContentPane().setBackground(Color.BLACK);
P1Frame.setSize(new Dimension(800, 900));
P1Frame.setLayout(null);
P1Frame.setLocationRelativeTo(null);
P1Frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
P1Frame.setLayout ( new FlowLayout () );
P1Frame.setVisible ( true );
P1Frame.setResizable(false);
JButton f2 = new JButton("Frame 2");
P1Frame.add(f2);
f2.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent e)
{
new NewForm();
}
});
}
}
package testjframe;
import java.awt.*;
import javax.swing.*;
/**
*
*
*/
class NewForm
{
public static void main(String[] args)
{
JFrame P2Frame = new JFrame ( "Project 1 second Frame" );
P2Frame.pack();
P2Frame.getContentPane().setBackground(Color.RED);
P2Frame.setSize(new Dimension(800, 900));
P2Frame.setLayout(null);
P2Frame.setLocationRelativeTo(null);
P2Frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
P2Frame.setLayout ( new FlowLayout () );
P2Frame.setVisible ( true );
P2Frame.setResizable(false);
}
}
Related
In Javafx, I am trying to create a pane where I can add points through a mouse click event. When you click on the pane a circle should appear at your mouse position. The circles are being created, as I am tracking them in the console, but they are not showing in the graphics.
I did a similar program to this that auto drew an image that resized with the stage/window, I am using all the same techniques but that project didn't include event handling.
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Line;
import javafx.scene.paint.Color;
import javafx.event.EventHandler;
import javafx.scene.input.MouseEvent;
public class ClickToShape extends Application {
private ClickPane clickPane = new ClickPane();
#Override
public void start(Stage primaryStage) throws Exception {
Pane clickPane = new ClickPane();
clickPane.setOnMouseClicked(new ClickHandler());
// create the scene
Scene clickScene = new Scene(clickPane, 500, 500);
// set up the window/stage
primaryStage.setTitle("Click To Draw");
primaryStage.setScene(clickScene); // add the scene to the stage
primaryStage.show(); // fire it off
}
public static void main(String[] args) {
launch(args);
}
class ClickHandler implements EventHandler<MouseEvent> {
#Override
public void handle(MouseEvent e) {
System.out.println("MouseEvent occured");
clickPane.addPoint(e.getX(), e.getY());
}
}
}
class ClickPane extends Pane{
private ArrayList<Circle> points = new ArrayList<Circle>();
private Color color1 = Color.BLACK;
public void addPoint(double x, double y) {
System.out.println("A new point function ran");
Circle newPoint = new Circle (x, y, 300, color1 );
System.out.println(newPoint.toString());
points.add(newPoint);
getChildren().clear();
getChildren().add(newPoint);
}
}
There are no error messages.
the problem is that you instantiated two ClickPane objects, one outside the start method, and another inside the start method, you added the second one to the scene but used the first one to add points, and that's why points aren't showing in your scene
what you can do about this is delete the first line in your start method, so the application will be using the same instance to fire events as to add to the scene, the code would look like this
import java.util.ArrayList;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Circle;
import javafx.scene.paint.Color;
import javafx.event.EventHandler;
import javafx.scene.input.MouseEvent;
public class ClickToShape extends Application {
private ClickPane clickPane = new ClickPane();
#Override
public void start(Stage primaryStage) throws Exception {
clickPane.setOnMouseClicked(new ClickHandler());
// create the scene
Scene clickScene = new Scene(clickPane, 500, 500);
// set up the window/stage
primaryStage.setTitle("Click To Draw");
primaryStage.setScene(clickScene); // add the scene to the stage
primaryStage.show(); // fire it off
}
public static void main(String[] args) {
launch(args);
}
class ClickHandler implements EventHandler<MouseEvent> {
#Override
public void handle(MouseEvent e) {
System.out.println("MouseEvent occured");
clickPane.addPoint(e.getX(), e.getY());
}
}
}
class ClickPane extends Pane{
private ArrayList<Circle> points = new ArrayList<Circle>();
private Color color1 = Color.BLACK;
public void addPoint(double x, double y) {
System.out.println("A new point function ran");
Circle newPoint = new Circle (x, y, 10, color1 );
System.out.println(newPoint.toString());
points.add(newPoint);
getChildren().setAll(newPoint);
}
}
I'm working on a very simple program. I have an ImageView and I want to firing to this ImageView a ZoomEvent that I created. In Javafx 8 there 2 constructor that I can use to create ZoomEvent. But the listeners doesn't catch the event.
StackPane root = new StackPane();
final ImageView img = new ImageView(url);
img.setOnZoom(new EventHandler<ZoomEvent>() {
#Override
public void handle(ZoomEvent t) {
System.out.println("Zoom!");
}
});
img.setOnZoomStarted(new EventHandler<ZoomEvent>() {
#Override
public void handle(ZoomEvent t) {
System.out.println("Zoom Started!");
}
});
img.setOnZoomFinished(new EventHandler<ZoomEvent>() {
#Override
public void handle(ZoomEvent t) {
System.out.println("Zoom finished!");
}
});
ZoomEvent evt = new ZoomEvent(ZoomEvent.ANY, 200,200,200,200,false,false,false,false,false, false, 5.0,5.0, null);
root.getChildren().add(img);
Scene scene = new Scene(root, 600, 600);
primaryStage.setTitle("Zoom Sample");
primaryStage.setScene(scene);
primaryStage.show();
This is my code so far and I can't figure out what is wrong. There isn't any output.
You never fired the event with ZoomEvent.fireEvent(target, event) or stage.fireEvent(event).
You created the wrong type of event (create a ZoomEvent.ZOOM, not a ZoomEvent.ANY).
You didn't set the event screen co-ordinates correctly.
Working sample:
import javafx.application.Application;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.input.ZoomEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Zoom extends Application {
public static void main(String[] args) { launch(args); }
#Override
public void start(Stage stage) {
final ImageView img = new ImageView(
"http://icons.iconarchive.com/icons/kirei-kaze/kikis-delivery-service/256/jiji-icon.png" // image license: License: Free for non-commercial use. The products or characters depicted in these icons are © by Studio Ghibli. Linkback: http://www.iconarchive.com/artist/kirei-kaze.html
);
img.setOnZoom(e -> System.out.println("Zoom!"));
StackPane layout = new StackPane(img);
stage.setScene(new Scene(layout, 600, 600));
stage.show();
Point2D screenCoords = layout.localToScreen(300, 300);
ZoomEvent evt = new ZoomEvent(
ZoomEvent.ZOOM,
300, 300,
screenCoords.getX(), screenCoords.getY(),
false,false,false,false,false, false, 5.0,5.0, null
);
ZoomEvent.fireEvent(img, evt);
}
}
How to create a click event search button in Eclipse?? Can someone help me. This is the code im working with.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search);
listContent1 = (ListView)findViewById(R.id.lFoodlist1);
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
Cursor cursor = mySQLiteAdapter.queueAll();
startManagingCursor(cursor);
String[] from = new String[]{SQLiteAdapter.KEY_FOODNAME,SQLiteAdapter.KEY_CALORIES};
int[] to = new int[]{R.id.tv1, R.id.tv2};
SimpleCursorAdapter cursorAdapter =
new SimpleCursorAdapter(this, R.layout.row, cursor, from, to);
listContent1.setAdapter(cursorAdapter);
//listContent.setOnItemClickListener(listContentOnItemClickListener);*/
}
This code was taken from Here and was modified/commented to help the poseter with his scenario.
You can implement swing to help with the GUI aspect of your application. Others may prefer AWT
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class myTest {
public static void main(String[] args) {
//This will create the JFrame/JPanel/JButton
final JFrame frame = new JFrame();
JPanel panel = new JPanel();
JButton button1 = new JButton();
//Add your panel and button and make them visable
frame.add(panel);
panel.add(button1);
frame.setVisible(true);
//This adds the actionListener to the Button
button1.addActionListener(new ActionListener() {
//When the button is clicked this action will be performed
public void actionPerformed(ActionEvent arg0) {
//Add your code here.
}
});
}
}
I tried to add action handlers to text field using the addEventHandler() but seem not to be working. Is it even possible o is it a bug? If I try the same with Button control everything is fine.
Here is the sample code:
package com.teste;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class EventHandlerTest extends Application {
#Override
public void start(Stage stage) throws Exception {
// TODO Auto-generated method stub
stage.setTitle("Custom JavaFX Event");
TextField btn = new TextField();
btn.setId("Fire Button");
btn.setText("Fire MyEvent'");
btn.addEventHandler(ActionEvent.ACTION, new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
if (event.getEventType().equals(ActionEvent.ACTION)) {
System.out.println("ActionEvent 2");
}
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
stage.setScene(new Scene(root, 300, 250));
stage.show();
}
/**
* #param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
launch(args);
}
}
Documentation says it should be possible, but can't find anything else. Any ideas?
If you use setOnAction rather than addEventHandler, then you will be able to capture the ActionEvent for the TextField.
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override public void handle(ActionEvent event) {
System.out.println("ActionEvent: " + event);
}
});
I don't know why the addEventHandler code does not capture the event. I also tried addEventFilter as well and that did not work for me either (JavaFX 2.2).
Note that a TextField will generate an ActionEvent when you press the Enter key on the TextField.
In java 8 now is possible
btn.addEventHandler(ActionEvent.ACTION, new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("ActionEvent: " + event);
}
});
//Lambda Notation
btn.addEventHandler(ActionEvent.ACTION, event -> {
System.out.println("ActionEvent: " + event);
});
I've tried a bunch of different ways to close the window, but since you can't send additional parameters to to Action Listener method I can't dispose the frame due to a pointer exception for the frame.
This is my current code.
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class errorRequiredFieldMissing extends JDialog{
JLabel error;
JButton exit;
public static JFrame frame;
public errorRequiredFieldMissing() {
super(frame, "Error", true);
setLayout(new FlowLayout());
error = new JLabel ("Required field or fields missing, please fill in all fields to continue.");
add(error);
exit = new JButton ("OK");
add(exit);
System.out.println("chk1");
exit.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event){
System.out.println("chk2");
frame.dispose();
}
});
}
public static void method2(){
System.out.print("success!");
errorRequiredFieldMissing gui = new errorRequiredFieldMissing();
gui.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
gui.setSize(400,100);
gui.setLocation(300,25);
gui.setVisible(true);
}
}
try this way:
exit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
exitActionPerformed(evt);
}
});
and then
private void exitActionPerformed(java.awt.event.ActionEvent evt) {
this.dispose();
}