invokeLater

[Ike]

Can anyone please tell me why my invokeLater in the following code never
displays the JFrame I am trying to get it to display, and shows no
exceptions either? I am certain I must have somethign stupid and wrong here.
Thanks, Ike

public void putupreconnectnotice(boolean on){
if(on){
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
connectionLost();
}
});
}else{
if(waitjframe!=null){
waitjframe.dispose();
}
}
}

private void connectionLost(){
waitjframe = new JFrame("Connection to server lost!");
waitjframe.setSize(310, 75);
waitjframepanel=new JPanel();
waitjframepanel.setPreferredSize(new Dimension(300,60));
waitjframepanel.setBackground(Color.WHITE);
waitjframepanel.add(new JLabel("Attempting to reconnect"));
waitjframe.getContentPane().add(waitjframepanel);
waitjframe.pack();
waitjframe.setVisible(false);
waitjframepanel.grabFocus();
}

 

[Steve W. Jackson]

Can anyone please tell me why my invokeLater in the following code never
displays the JFrame I am trying to get it to display, and shows no
exceptions either? I am certain I must have somethign stupid and wrong here.
Thanks, Ike

public void putupreconnectnotice(boolean on){
if(on){
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
connectionLost();
}
});
}else{
if(waitjframe!=null){
waitjframe.dispose();
}
}
}

private void connectionLost(){
waitjframe = new JFrame("Connection to server lost!");
waitjframe.setSize(310, 75);
waitjframepanel=new JPanel();
waitjframepanel.setPreferredSize(new Dimension(300,60));
waitjframepanel.setBackground(Color.WHITE);
waitjframepanel.add(new JLabel("Attempting to reconnect"));
waitjframe.getContentPane().add(waitjframepanel);
waitjframe.pack();
waitjframe.setVisible(false);
waitjframepanel.grabFocus();
}

Perhaps it's because your connectionLost method specifically calls
setVisible(false) on the frame?

 

[Michael Rauscher]

Can anyone please tell me why my invokeLater in the following code never
displays the JFrame I am trying to get it to display, and shows no
exceptions either? I am certain I must have somethign stupid and wrong here.
Thanks, Ike

Apart from the possibility of passing false to putupreconnectnotice, I'd
expect that this

waitjframe.setVisible(false);

isn't what you really want

Bye
Michael

 

[Daniel Pitts]

Can anyone please tell me why my invokeLater in the following code never
displays the JFrame I am trying to get it to display, and shows no
exceptions either? I am certain I must have somethign stupid and wrong here.
Thanks, Ike

public void putupreconnectnotice(boolean on){
if(on){
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
connectionLost();
}
});
}else{
if(waitjframe!=null){
waitjframe.dispose();
}
}
}

private void connectionLost(){
waitjframe = new JFrame("Connection to server lost!");
waitjframe.setSize(310, 75);
waitjframepanel=new JPanel();
waitjframepanel.setPreferredSize(new Dimension(300,60));
waitjframepanel.setBackground(Color.WHITE);
waitjframepanel.add(new JLabel("Attempting to reconnect"));
waitjframe.getContentPane().add(waitjframepanel);
waitjframe.pack();
waitjframe.setVisible(false);
waitjframepanel.grabFocus();
}

As others have pointed out
you might want to setVisible(true) instead of setVisible(false)

 

[Ike]

Yep....that was it....I just couldn;t see it. Thanks so much guys. -Ike

 

[Tom Hawtin]

public void putupreconnectnotice(boolean on){
if(on){
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
connectionLost();
}
});
}else{
if(waitjframe!=null){
waitjframe.dispose();
}
}
}

Not the problem you were having, but dispose should be run in the EDT as
well as showing the frame.

private volatile boolean notice;
public void setNotice(boolean notice){
this.notice = notice;
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
if (MyClass.this.notice) {
connectionLost();
} else {
if (noticeFrame != null){
noticeFrame.dispose();
}
}
}
});
}

Tom Hawtin