I am trying to have a bind a focuslost event on my combobox but it's not happening.
Here is my code-:
jComboBox1.addFocusListener(new FocusListener(){
public void focusGained(FocusEvent e){
}
public void focusLost(FocusEvent e){
JOptionPane.showConfirmDialog(null,"focuslost");
}
});
I also tried this-:
JComboBox default editor has an internal class BasicComboBoxEditor$BorderlessTextField that is the component that gets and loses focus.
It can be accessed simply by-:
Component component = comboBox.getEditor().getEditorComponent();
if (component instanceof JTextField)
JTextField borderlesstextfield = (JTextField) borderless;
But i am getting error on this line-
JTextField borderlesstextfield = (JTextField) borderless;
I am new to netbeans. Kindly guide me.Thank you in advance.
I tested this(Adding the JComboBox inside a JPanel ). If there are more elements inside the panel the focuslost is triggered when pressing tab or clicking on another element.
Considering that you do not have any other elements or you want the focus lost event to trigger also when you click somewhere on the window:
Keep your focus listener as is and add the following after the auto-generated initComponents():
jPanel1.setFocusable(true);
jPanel1.setRequestFocusEnabled(true);
jPanel1.addMouseListener(new MouseListener() {
#Override
public void mouseClicked(MouseEvent e) {}
#Override
public void mousePressed(MouseEvent e) {
jPanel1.requestFocusInWindow();
}
#Override
public void mouseReleased(MouseEvent e) {}
#Override
public void mouseEntered(MouseEvent e) {}
#Override
public void mouseExited(MouseEvent e) {}
});
Related
I'm developing an eclipse plugin. It writes some lines in a console. In order to select a line displayed in the console, I’m trying to capture mouse double click event from that console.
The console has been implemented by following this eclipse FAQ. MessageConsole or IconsoleView classes doesn‘t seem to provide a methode to add a listener with an SWT.MouseDoubleClick event.
Is there any way to capture a mouse event from a console and then read the selected line ?
The MessageConsole doesn't know anything about how the data is displayed, it is the TextConsoleViewer that deals with that.
To access the console viewer you need to use a custom message console - extending MessageConsole or TextConsole and overriding createPage to create your own console page extending TextConsolePage.
The console page needs to override the createViewer method to create your own text console viewer extending TextConsoleViewer.
In the viewer you can override the mouseDoubleClick method to receive the double clicks.
For an example see the Eclipse JDT JavaStackTraceConsole, JavaStackTraceConsolePage, and JavaStackTraceConsoleViewer classes.
public class JavaStackTraceConsole extends TextConsole {
...
#Override
public IPageBookViewPage createPage(IConsoleView view) {
return new JavaStackTraceConsolePage(this, view);
}
}
public class JavaStackTraceConsolePage extends TextConsolePage {
...
#Override
protected TextConsoleViewer createViewer(Composite parent) {
return new JavaStackTraceConsoleViewer(parent, (JavaStackTraceConsole) getConsole());
}
}
public class JavaStackTraceConsoleViewer extends TextConsoleViewer {
...
}
Thank you, it works fine. I just had to managed the mouse event in another way because overriding the mouseDoubleClick method didn’t work. Here is my code :
public class MyTextConsoleViewer extends TextConsoleViewer {
public MyTextConsoleViewer(Composite parent, MyMessageConsole console) {
super(parent, console);
StyledText styledText = getTextWidget();
MouseListener listener = new MouseListener() {
#Override
public void mouseUp(MouseEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public void mouseDown(MouseEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public void mouseDoubleClick(MouseEvent event) {
// TODO Auto-generated method stub
IDocument document = console.getDocument();
try {
int currentLine = document.getLineOfOffset(styledText.getOffsetAtLocation(new Point (event.x, event.y)));
IRegion lineInfo = document.getLineInformation(currentLine);
System.out.println(document.get(lineInfo.getOffset(), lineInfo.getLength()));
} catch (BadLocationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
styledText.addMouseListener(listener );
// TODO Auto-generated constructor stub
}
public MyTextConsoleViewer(Composite parent, TextConsole console,
IScrollLockStateProvider scrollLockStateProvider) {
super(parent, console, scrollLockStateProvider);
// TODO Auto-generated constructor stub
}
#Override
public void mouseDoubleClick(MouseEvent e) {
System.out.println("This even doesn't work!");
}
}
I have a Composite containing a number of Text controls. I have attached MouseListeners to each control.
What surprises me is that sometimes, when I click on a control, I get a MouseDown event from its neighbour. The Event position is outside of the control's boundary and I get no event from the other control which I thought I had clicked on.
What can cause this to happen?
SNIPPET
Run. Press Esc to close the MessageBox. Click in field BBBB. Press Esc to close MessageBox. Click in field AAAA. The event is generated from field BBBB.
public class Test
{
public class MyListener implements MouseListener, FocusListener
{
private boolean active;
#Override
public void focusGained(FocusEvent e)
{
System.out.println(e);
message((Text) e.widget, "FocusGained");
}
#Override
public void focusLost(FocusEvent e)
{
System.out.println(e);
}
#Override
public void mouseDoubleClick(MouseEvent e)
{
}
#Override
public void mouseDown(MouseEvent e)
{
System.out.println(e);
}
private void message(final Text t, final String m)
{
if (active == false)
{
active = true;
MessageBox mb = new MessageBox(t.getShell());
mb.setText(m);
mb.setMessage(t.getMessage() + "\n\n" + m);
mb.open();
active = false;
}
}
#Override
public void mouseUp(MouseEvent e)
{
System.out.println(e);
message((Text) e.widget, e.toString());
}
}
private MyListener listener = null;
public static void main(String[] args)
{
Display display = new Display();
Shell shell = new Shell(display);
new Test(shell);
shell.open();
while (!shell.isDisposed())
{
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
public Test(Composite parent)
{
listener = new MyListener();
create(parent);
}
private void create(Composite parent)
{
parent.setLayout(new GridLayout(2, true));
createText(parent, "AAAA");
createText(parent, "BBBB");
parent.layout(true);
}
private Text createText(Composite parent, String message)
{
Text t = new Text(parent, SWT.NONE);
t.setMessage(message);
GridData gd = new GridData(SWT.FILL, SWT.CENTER, true, false);
t.setLayoutData(gd);
t.addFocusListener(listener);
t.addMouseListener(listener);
return t;
}
}
This is indeed strange. When traversing from B to A, the MouseUp event is marked as sent from field B.
If you replace the MessageBox with something non-interrupting i.e. System.out, the mouse event senders are the right ones.
To me, this seems more of a theoretical corner case. Decent applications would not interrupt the users field traversal with a modal window. However, if this is relevant for your, I'd report a bug to SWT.
I managed to get this working by de-coupling the pop-up window from the events. The message method now looks like this:
private void message(final Text t, final String m)
{
//NB active is declared as 'volatile'
if (active == false)
{
active = true;
t.getDisplay().asyncExec(new Runnable()
{
#Override
public void run()
{
MessageBox mb = new MessageBox(t.getShell());
mb.setText(m);
mb.setMessage(t.getMessage() + "\n\n" + m);
mb.open();
active = false;
}
});
}
else
{
System.out.println("Already active: " + t.getMessage());
}
}
This seems to give the events the opportunity to continue uninterrupted by the pop-up window. The pop-up will be activated a short while later. So far it works ok.
The default behaviour when creating a new Eclipse ViewPart is to show the new tab regardless of what happens in the createPartControl function. For example, if didn't create anything, no widgets, nothing, a blank tab will be shown. I don't like this behaviour. I want to close that tab if initialization in createPartControl fails.
Now, I have a mouse-button-context-menu handler that can do this, e.g.
public class MyPartMB3Handler extends AbstractHandler {
#Override
public Object execute(final ExecutionEvent event)
throws ExecutionException {
// Create a view and show it.
IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event);
IWorkbenchPage page = window.getActivePage();
try {
MyPart viewPart = (MyPart)page.showView(MyPart.ID);
if(!viewPart.isCreated()) {
page.hideView(viewPart);
}
}
catch(PartInitException e) {
e.printStackTrace();
}
return null;
}
}
The isCreated function is a little hack that lets me know if my ViewPart initialization fails, e.g.
public class MyPart extends ViewPart {
public static final String ID = "com.myplugin.MyPart";
private Composite _parent = null;
#Override
public void createPartControl(Composite parent) {
if(!MyPlugin.createPartControl(parent) { // Some common part creation code I use.
//PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().hideView(this);
return;
}
_parent = parent;
}
#Override
public void setFocus() {
}
public boolean isCreated() {
return _parent != null;
}
}
The problem arises when I launch this ViewPart from the Eclipse "Quick Access" field. I don't own the handler now. From an exception I forced, the handler might be org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl or org.eclipse.ui.internal.e4.compatibility.CompatibilityView.createPartControl or org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create.
I tried hiding the view inside the createPartControl function (see the commented line above), but Eclipse did not like that and spewed a pile of exceptions.
I thought maybe I could throw a PartInitException in createPartControl, but Eclipse tells me I'm not allowed to do that.
So, how do I get my menu handler behaviour when launching from "Quick Access"?
An underlying question might be, is there a better/proper way to achieve this behaviour?
You can close the view by running the hideView asynchronously after the createPartControl has finished - like this:
#Override
public void createPartControl(Composite parent) {
parent.getDisplay().asyncExec(new Runnable() {
#Override
public void run()
{
getSite().getPage().hideView(MyPart.this);
}
});
I wrote this code and I want to use it when the user decide to exit my application.
when I activate it Eclipse telling me that there is an error with the yes button. This line is the problematic:yes.setOnClickListener(new View.OnClickListener() {
and this is the full code:
#Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
final Dialog exitDialog = new Dialog(this);
exitDialog.setTitle("Exit");
exitDialog.setContentView(R.layout.exit_dialog);
yes.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
exitDialog.dismiss();
finish();
}
});
exitDialog.show();
}
There are 2 possible problems
1st because of this keyword it is referencing the current Dialog class so give your ClassName.this
2nd because of final keyword remove the final keyword and give the listener in onCreate(Bundle SavedInstances) method
How did you initialize the button yes? The recommended way is:
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage(R.string.dialog_quit)
.setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
}
})
.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
});
Dialog dialog = builder.create();
dialog.show();
}
You can also refer to Android dialog guide.
You should use
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
exitDialog.dismiss();
finish()
}
});
instead of OnClickListener.
Another (better) option is to use JOptionPane.showConfirmDialog(...);
i need to update a textView from my asynctask. I have an custom adapter for the listview and there i want to have a countdown for each entry. I will start the asynctask for each entry from my Adapter. How can i update the textview each second from the asynctask?
Thanks for help :)
If you post your code, I can give you a better answer. However, a common way to update views periodically is by using Handlers.
private final Handler mHandler = new Handler(); //intialize in main thread
public void test() {
mHandler.postDelayed(new Runnable() {
#Override
public void run() {
mTextView.setText("hello");
}
}, 1000);
}
You can do something like this (this will add an entry to a list view every one second). I have used the normal ArrayAdapter to add a string. You can use your custom adapter to do something similar. The publishProgress() method basically triggers the onProgressUpdate() method which hooks to the UI thread and displays the elements getting added.:
class AddStringTask extends AsyncTask {
#Override
protected Void doInBackground(Void... params) {
for(String item : items) {
publishProgress(item);
SystemClock.sleep(1000);
}
return null;
}
#Override
protected void onProgressUpdate(String... item) {
adapter.add(item[0]);
}
#Override
protected void onPostExecute(Void unused) {
Toast.makeText(getActivity(), "Done adding string item", Toast.LENGTH_SHORT).show();
}
}