I'm trying to transfer focus from one JTextArea to another when the user hits tab.
Currently I'm using this code:
public void keyTyped(KeyEvent e) {
if(e.getKeyChar() == KeyEvent.VK_TAB){
enterTextArea.transferFocus();
}
}
This appears to work - the focus moves and you type in the next JTextArea - but actually the text stills gets appened to the first TextArea, meaning that performing a getText() on the second TextArea just returns "".
How do I make the text typed go to the second JTextArea rather than just get appended to the first?
EDIT: On further inspection this behavior was caused by a separate bug. No further help needed.
You can just transfer the text from 1 to 2 by using getText on the first one.
public void keyTyped(KeyEvent e) {
if(e.getKeyChar() == KeyEvent.VK_TAB){
enterTextArea.transferFocus();
String firstField = textField1.getText();
secondField.setText(firstField);
}
}
That way it will save from the first text area, and put it into the second one.
Hope this helps!
Related
I would like to know the best way to approach what I am trying to achieve, I can't figure out the logical path I should take.
I have a JTextField and a JTextButton, when input is added to the JTextField and either enter or the button is pressed, it will display on the JTextArea. Now, what I want is to choose when and what the JTextArea and Button do.
For example I want default Enter & Button to display next append text in my code. Then when a case is presented I want the JTextField to only accept either int or string and then once completed, I want it to go back to default.
I don't know if what I am trying to do is logical or best practice...
The idea behind this is, I have a story text based gui game. I want it to display text to the JTextArea and when Enter or button is pressed to display the next line of text and when in the story it requires user input, the JTextArea will look for that input.
So far I have an EventListener and ActionListener which submits what I type from JTextField to JTextArea, but that is about it.
Thanks for your assistance! I have solved my issue, not sure if this is the "Best Solution". I combined your solution with a bit of tweaking.
In this instance, buttonState is an int which can be changed throughout my code by calling a constructor "setButtonState". I could have made buttonState a static to make things easier, but thought I could keep things clean.
enterButton.addActionListener(new ActionListener()
{ //This is used so when the enter screen button is pressed, it will submit text from text field to text area.
public void actionPerformed(ActionEvent e) {
String text = inputTextField.getText();
InputTextFieldEvent event = new InputTextFieldEvent(this, text);
if (buttonState == 0) //Displays all text in JTextField to JTextArea, mostly for testing purposes.
{
if (textInputListener != null) {
textInputListener.setInputListenerOccurred(event);
}
}
if (buttonState == 1) //Only accepts string for answer
{
if (inputTextField.getText().matches("[a-zA-Z]+"))
{
textInputListener.setInputListenerOccurred(event);
}
else
{
getAppendMainTextArea("You have entered an invalid input, only letters are allowed.");
}
}
if (buttonState == 2) //Only accepts int for answer
{
if (inputTextField.getText().matches("[0-9]+"))
{
textInputListener.setInputListenerOccurred(event);
}
else
{
getAppendMainTextArea("You have entered an invalid input, only numbers are allowed.");
}
}
}
});
I have a JInternalFrame, where I wanted to display a JOptionPane when my JTable was double clicked. I looked around in the internet and found that the only way of doing it was to override mousePressed() method and this is how I did it:
tblJobs.addMouseListener (new MouseAdapter() {
#Override
public void mousePressed (MouseEvent e) {
JTable tbl = (JTable)e.getSource();
int row = tbl.rowAtPoint(e.getPoint());
if (e.getButton() == MouseEvent.BUTTON1 && row != -1) {
if (e.getClickCount() == 2) {
JOptionPane.showMessageDialog(null, "Double click detected");
}
}
}
});
The thing is, I also have a button to hide the frame, and when the frame was hidden and re-shown, I found that upon double clicking my JTable, the JOptionPane got displayed twice. The number of times the JOptionPane got displayed seemed to increase along with the number of times I hid and show the frame. My guess is, the mouseListener got called again and again when I hide and re-show my frame. Is there a way of removing the mouseListener that was added in this way? Or is there another way to stop the JOptionPane from displaying more than once? And also, if what my code was stupid in any way, feel free to tell me! :) Thanks in advance!
How about setting a Boolean calss variable hidden = true when you hide, hidden = false when you unhide ?
Set the first line in mousePressed() to if(hidden) return;
Well, I decided to edit everything. So, the code goes like this:
public void actionPerformed(ActionEvent e) {
if (!uiCreator.getTextArea().getText().equalsIgnoreCase("Beggining text")) {
JOptionPane.showMessageDialog(null, "You must have main method first", "Error",
JOptionPane.ERROR_MESSAGE);
} else {
n = Integer.valueOf(JOptionPane.showInputDialog("..."));
l = Integer.valueOf(JOptionPane.showInputDialog("..."));
uiCreator.getTextArea()
.setText("Beggining text with few additions");
On the code above, I made it to check if JTextArea contains text that is needed and if it doesn't it will show an error message. If it does it will set a text with few more words.
Now. I also have more JButtons. So if one is clicked, it will also do the same thing. Check the text and if it meets all conditions, set new modified text. But, now, my problem comes here. I have this:
public void actionPerformed(ActionEvent e) {
if (!uiCreator.getTextArea().getText()
.equalsIgnoreCase("Beggining text with few additions")) {
JOptionPane.showMessageDialog(null, "Error, you don't have main or JFrame inside main", "Error",
JOptionPane.ERROR_MESSAGE);
} else {
uiCreator.getTextArea()
.setText("Beggining text with even more additions");
}
Which checks if JTextArea had "Beggining text with few additions" and if it did, change the text to Beggining text with even more additions. I have few more buttons that do the same thing. Now, I would like to know a way to let setText(some text) method be used regardless is there Beggining text with few additions or Beggining text with even more additions.
Don't use setText(...) to keep replacing all the text.
Instead you can use methods like:
replaceSelection(...);
getDocument().insertString(...);
to change part of the text or insert new text.
I would like to format the user input in real time, while they are typing.
For example, if I want the user to enter a date, I would like the text field to show in light gray the date format. The user would only be able to enter valid digits while he is typing.
If I need the user to enter a phone number, the format would be displayed in light gray in the text field and the user would only be able to enter valid digits...
A javascript example of this can be found here:
http://omarshammas.github.io/formancejs#dd_mm_yyyy
I looked at JFormattedTextField but it seems it doesn't prevent the user from typing wrong characters.
I am wondering how to do the same thing in Java as the javascript code linked above.
Any idea to help me get started or any lib already doing this?
Thanks in advance for any suggestion.
The KeyListener interface has three methods to be implemented: keyPressed, keyTyped and keyReleased. As each key is pressed you can do what you need to in this implemented listener. So for example, if the current key typed or the current contents of the text field is not to your approval, you can take the visual or logical action you need to take.
I don't like links generally, but here is a small tutorial on KeyListeners.
And here is an example to add a KeyListener to a JTextField:
usernameTextField.addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent e) {
JTextField textField = (JTextField) e.getSource();
String text = textField.getText();
textField.setText(text.toUpperCase());
}
public void keyTyped(KeyEvent e) {
// TODO: Do something for the keyTyped event
}
public void keyPressed(KeyEvent e) {
// TODO: Do something for the keyPressed event
}
});
so I have this part of my code (I cannot post everything because it's just too long and so far this is the only problem with it). Our professor assigned us to make our own Assembler just like MARIE and we are having a trouble with these lines of code:
else if(get.charAt(0)=='B')//input
{
inputfield.setEditable(true);
//INSERT LISTENER HERE!
AC.setText(inputfield.getText());
System.out.println(""+col);
//insert action here - HALP
}
The entire thing gets a value from a table sort of like an Instruction in Hex and if the Intruction starts with B like B000 then it will toggle the input textbox which is named inputfield. It works fine but we need to add a key listener in the part where it says //INSERT LISTENER HERE! for when the user will press enter the AC.setText(inputfield.getText()); will be executed. How should we do it? I mean we tried actionListener but it sort of stops the loop unless another button is clicked. We need another way that when the user presses enter it automatically resumes the execution.
Thank you.
Add action listener to textfield. ActionEvent will occur when you press Enter while editing in textfield.
JTextField field = new JTextField();
field.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// action to perform when one hits "Enter"
}
});