Swing/AWT/SWT :: Controls Not Updating Until Method Is Completely Finished
Dec 30, 2014
I have this method that does several RegEx queries along with a lot of searching and replacing of text, and each regex search / replace takes some time and a total of maybe two minutes for all of them to finish up. So I added a ProgressBar to my JavaFX form and I added code after each step to simply use the ProgressBar.setProgress method by a factor of 10% each step ... so the code would resemble something like this:
do a regex query
if it finds things then do a replaceAll method on the string being searched
ProgressBar.setProgress(.1)
do another RegexQuery
If it finds stuff, so a replaceAll method
ProgressBar.setProgress(.2)
etc...
What is happening is that the progress bar will not actually paint any progress until AFTER the entire method is done executing. So from the users perspective, they click on the button and the program appears to freeze until its all done with that method at which point it instantly changes the progress bar to the last value I set ...
So the desired effect is simply not working, and I don't know why.
I tried changing (as in replacing the progress bar with a different control) the progress bar value settings with updating text in a text box on the form, and even that didn't display any of the text messages until AFTER the procedure was done executing at which point, all of the text logs appeared at one time instead of gradually adding text to the box in increments as the method executed.So it FEELS like any time a method is actually running, the JavaFX scene simply freezes until the method is done running. And it doesn't matter if I change the progress bars value directly or put it into its own method which gets called throughout the execution of the regex method ... either way, nothing actually happens on the form until the software is done executing all of the procedures called and then it comes back to a "resting" state...
I tried simplifying it by making a single method that does two things ... it updates the progress bar and then it waits for 1 second. Then it increments a variable then updates the progress bar, then waits a second, thinking to myself that 1 second pause would give it time to update the progress bars value but even that little method would not work.
Here is the test method I created:
private void testProgressBar() {
for(int x = 0;x<10;x++) {
progressBar.setProgressBar(.1*(x+1));
try {
sleep(1000);
}
catch(InterruptedException e) {
e.printStackTrace();
}
}
}
Even that little piece of code will not actually show any changes in the progress bar until after its done looping at which point, the progress bar is filled to 100%, but I never see the first 9 changes in the progress bar within that for next loop.
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Jun 17, 2014
I got a JFrame with its JDesktopPane, and opens a JInternalFrame at the beginning of the execution of the application. That's all fine.
And then, the first JInternalFrame opens another JInternalFrame in its maximum size, and that's when a simple JLabel that I got o the second internal it disapears. Why?
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Sep 4, 2014
If I run this code. I can manipulate it so that X wins. When the third X button is pressed, there is no display saying that X has won and that the game is over. I have read over this code for days and still have not figured it out.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TicTacToe extends JFrame implements ActionListener, WindowListener{
public JFrame window = new JFrame("window");
[Code] ....
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Jun 26, 2015
updating a label from a different actionPerformed class. The problem is in the settext command it is not updating the JLabel.
public class total1 extends swingPointofSale implements ActionListener
{
public double totalCost;
public String totLabel;
[Code]....
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Aug 14, 2014
Why the Progress Bar is not Working in Second attempt?When i am Invoking Below Method on actionPerformed at first attempt its Working Fine but After that Its Not Working at all....
void initWait() {
go.setEnabled(false);
browse.setEnabled(false);
choice.setEnabled(false);
wait.setVisible(true);
wait.setMinimum(0);
wait.setMaximum(Info.getMp3().length);
System.out.println(Info.getMp3().length);
wait.setStringPainted(true);
[code]...
for a better Understand see this Mp3Arranger.jar or see the Whole Project SourceCode
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Jan 21, 2015
I am working on a project in Eclipse, and it is my first time working with swing.I have the GUI setup the way that I like it, my hang-up is how to "update" the variables in the code as they are changed.The basics of the code is that I have several different String[] that will show up in a Jtable depending upon the input of the lists I have in the GUI.
in essence,
if list1==2 && list2==3
returnedarray = array1
I would like to have the returnedarray/Jtable be updated live as the lists are manipulated. So as soon as I change my list selections to...
list1==1 && list2==3
the code would shift to the proper array...
returnedarray = array2
If making the output update live isn't a possibility how would I code a button to update the input/output giving me the proper String[]?
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Nov 18, 2014
why JLabel setText method is not setting up the text dynamically even though i am calling repaint() once i set the text? Code snippet is below
Locale currentLocale = new Locale(panel.getCountryLocal(), panel.getCountry());
ResourceBundle messages = ResourceBundle.getBundle(Constants.messageBundle, currentLocale);
messages = Panel.getMessages();
String displayString = messages.getString("101022");
[code]....
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Jul 2, 2014
I have been going in circles trying to update a JTable. For now I just need to take input from a textfield after clicking on a JButton and have that text be placed in the JTable. LeftPanel listens, while RightPanel holds the table. Here is what I have so far:
package reminder.views;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class LeftPanel extends JPanel {
]Code] ....
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May 28, 2014
I wrote a simple random spelling game for a class project, was never able to get the labels to update when they should. I have tried .updateUI, .paintImmediately followed by .revalidate and by .repaint. Nothing seems to be working.
What the game does is show a random word for about 10 seconds, disappear and they user is to spell that word, you have 3 tries then will start over. The "brains" of the game work just fine, it is the labels updating with new text when they should doesn't seem to be working. There is 4 classes but the below is the "Main" that has the problems. Also have a null exception problem with the timer.stop(); not sure why. I am still pretty new to java.
Public class SpellMe extends JFrame {
// variables
JPanel mainPanel, secondPanel, thirdPanel;
JLabel mainLabel, wordLabel;
String spWord, sp;
JTextArea guess;
[Xode] .....
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Jul 27, 2014
I have been new to JAVA programming language and have been using it for generation of a GUI (with NET BEANS).
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I need an a way to detect when the thread is done and accordingly some action to be taken afterwards.
I tried with isAlive, but to no avail.
Example is, I press an JButton, thread starts, when finished Jbutton get colour changed.
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Sep 11, 2014
I'm having trouble understanding how this loop is broken, I can't understand how the boolean finished is set to false and breaks the While loop.
public void run()
{
char answer;
boolean finished = false;
while(!finished)// when false loop is broken
[Code] ....
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Apr 6, 2014
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Jun 24, 2014
How can I delete a JPanel and all of its associated variables?
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May 7, 2014
package roulette;
import java.util.*;
public class Roulette {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
[Code] ....
This is were its going wrong if i just do a straight "spin" it works but when i try and add additional bets into an array for future comparrison it simply kicks out to my "do" statements says you have quit and acts like i simply hit spin.
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Jan 31, 2014
Im following a simple set of code and can not get the correct output, in chapter 1 (Intro to Java).Im stuck on getting a set of code to run completely through command prompt. I installed.JDK and textpad4, type the code, save it, direct towards it in cmd prompt but javac wont work. Here's the code I put in textpad;
public class Test {
public static void main(string[] args)
Ststem.out.println("3.5 * 4 / 2 - 2.5 is ")
System.out.println(3.5 * 4 / 2 - 2.5);
[code]....
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Oct 1, 2014
I'm new on Java/android and I wounder how could I get name of each control in a layout, ex.
for (int i=0;i<table1.getChildCount();i++ ) {
Object child=table1.getChildAt(i);
if( child instanceof EditText)
{
//get control name here
}
}
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Nov 8, 2014
I am trying to create a form where my customer can add some other fields(like: label,textbox), and he need to use that added fields for the next time he open the application...
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Jun 15, 2015
I have been using JavaFX for some time now and have encountered many performance issues, mainly with the initial display of GUI elements. For example, a simple stage with a table view (with about 10 columns) and chart takes about 5 seconds to display. A color picker will take about 3 seconds from the time I click the control to when it displays the pallet. This only happens when the controls are first displayed. This can't be right. I have searched and none seems to have a similar problem so I thought I would ask here just to make sure. Here is a sample Hello world that shows the problem with the color picker (takes ~ 3 seconds to show pallet when clicked).
public class HelloWorld extends Application
{
@Override
public void start(Stage primaryStage) {
StackPane root = new StackPane();
ColorPicker cp = new ColorPicker();
root.getChildren().add(cp);
[Code] .....
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Feb 6, 2014
Is it possible to "drag & drop" controls from a db to the form design in Netbeans? InVB this is possible. How about Java - Netbeans?
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Dec 9, 2014
I have a stylesheet (mystylesheet.css) with following entry:
.flowpane{
-fx-background-color: rgb(0,0,0);
}
In then start-method of my application I execute:
StackPane root = new FlowPane();
Scene scene = new Scene(root,primaryScreenBounds.getWidth(),primaryScreenBounds.getHeight());
scene.getStylesheets().add(css.getFile());
root.applyCss();
No FlowPane gets black. But if I do that in SceneBuilder and add the stylesheet to root than after loading Fxml-file the FlowPane gets black.
Another approach:
StackPane root = new FlowPane();
Scene scene = new Scene(root,primaryScreenBounds.getWidth(),primaryScreenBounds.getHeight());
scene.getStylesheets().add(css.getFile());
root.getStyleSheets().add(css.getFile());
root.applyCss();
Nothing happens.
StackPane root = new FlowPane();
Scene scene = new Scene(root,primaryScreenBounds.getWidth(),primaryScreenBounds.getHeight());
scene.getStylesheets().add(css.getFile());
root.getStyleSheets().add(css.getFile());
root.getStyleClass().add("flowpanel");
root.applyCss();
Doesn't work too;
but root.setStyle("-fx-background-color: rgb(0,0,0) works. But I need to style my application by css-files.
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Apr 29, 2014
I am using JSF2 with Primefaces. Here is my business requirement-Hidden field on JSF page should take the value from the session object that is set in managed bean. Session object is updated every time when the user submits the page. I am able to update the session object in the managed bean and able to get the value in the hidden field first time and after that i see the same value in the hidden field even though session object has different value. Here is the hidden field: <h:inputHidden id="xyz" value="xyz"/> i tried using sessionScope but still didn't work.
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Feb 20, 2015
I have a jTextPane set up and a panel with radioButtons. My jTextPane displays the contents of a text file I have chosen. The 3rd line, 4th index, displayed in my jTextPane specifies a value of type int. When I click my radioButton, I would like that value to increase by 1. So far, I have the following code. I tried to pane.setText(value + 1), but that doesn't seem to work. How do I update the value and display the updated value in jTextPane?
My code :
private final ActionListener actionListen = new ActionListener() {
for(String line: pane.getText().split("")){ String lineThree = line[3];
int value = lineThree.charAt(4); if(radioButton.isSelected()){
pane.setText(value+1); } }};
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Mar 20, 2015
The program runs well , it adds the applet but it dosn't update the interface unless I press "_"(Minimize) . To be more clear , the object paints a spring wich goes through 4 stages , it is added to the JFrame but it dosn't uptade until I minimize the frame , that is when it goes to the next stage .
The main class which calls the spring to be added to the frame :
public class principal implements ActionListener ,Runnable{
JTextField field;
JFrame frame;
private class Action implements ActionListener {
public void actionPerformed(ActionEvent event) {
frame.repaint();
[Code] .....
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Oct 18, 2014
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
[Code]....
I am trying to Make A GUI which has a Jcombo box i also want it to have a jlabel that up dates depending on which option the user selects from the JcomboBox
for exampl if i select lion i want it to say you chose lion on the Jlabel and if i choose ostrich i want it to say ostrich and so on
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Sep 26, 2014
I have two images. I want to be able to click them and kick off a call to a listener in Java to change a value in the bean. I also want the view to update my dropdown (labeled "menuModel") to either be rendered or not, depending on which image I click. Alternatively, I would be fine with the dropdown simply being disabled and enabled for the same criteria.
So far, the listener kicks off fine, and the value gets updated correctly in the bean. However, the view never gets updated. I have tried this a hundred different ways, but nothing seems to work. If I hit refresh on my browser, the view updates. But I want it to do it automatically.
I am using standard JSF 2.1.
<div style="font-family: Verdana; font-size: 10pt; color: #FFFFFF">
<h2>Calibrations</h2>
<h:form id="tunerSelectionForm" style="color: #000000">
<h:commandLink>
[Code] .....
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Jun 15, 2014
I have loaded the combo box at starting of program.When i am adding the element to combo box through database it's not updating visually.But the inserted data is successfully loaded in List.
void update_Attan() {
DefaultComboBoxModel nm = new DefaultComboBoxModel(new StudentMethods().update_combo_AttendanceType());
cmbStdAttType.setModel(nm);
}
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