I have class InfoDialog which extends JDialog class in Java. I show InfoDialog while I am establishing SSH connection ( 5 or 6 seconds ) with info text. How to put focus on InfoDialog that user cannot do anything else until InfoDialog runaway ?
I don't think you can lock the entire OS, but you can definetly lock your application by setting it modal. See the API of JDialog or do something like this:
JDialog info = new JDialog();
info.setModal(true);
I think you are looking for Modality:
Modality defines whether
The new modality model enables the developer to scope, or limit, a dialog box's modality blocking.
The following modality types are supported in Java SE 6:
Modeless type — A modeless dialog box
does not block any other window while
it is visible.
Document-modal type —
A document-modal dialog box blocks all
windows from the same document, except
windows from its child hierarchy. In
this context, a document is a
hierarchy of windows that share a
common ancestor, called the document
root, which is the closest ancestor
window without an owner.
Application-modal type — An
application-modal dialog box blocks
all windows from the same application,
except windows from its child
hierarchy. If several applets are
launched in a browser environment, the
browser is allowed to treat them
either as separate applications or as
a single application. This behavior is
implementation-dependent.
Toolkit-modal type — A toolkit-modal
dialog box blocks all windows that run
in the same toolkit, except windows
from its child hierarchy. If several
applets are launched, all of them run
with the same toolkit. Hence, a
toolkit-modal dialog box shown from an
applet may affect other applets and
all windows of the browser instance
that embeds the Java runtime
environment for this toolkit.
You can define modality while creation:
JDialog dialog = new JDialog(owner, Dialog.ModalityType.DOCUMENT_MODAL);
or later:
dialog.setModalityType(type)
*There is one more level: System Level Modality, but this is not possible with just Java.
Another option is to use a Progress Bar for this.
Related
Im trying to make a java program that will popup/notify me to stop what I am currently doing and do something. more like a reminder. My question is how will I make a pop up in java.
I found this docs, but dont know how to implement for the parent component.
JOptionPane.showMessageDialog(??,"this is a modal dialog.");
The answer depends, do you have a parent component (like a JFrame or other component) or are you simply display the JOptionPane independently?
If you are simply displaying the JOptionPane independently, you can simply pass it null.
If you are displaying the JOptionPane as part of a large application, with windows and other components, you can simply pass it a reference of what ever component you want the JOptionPane to displayed relative to, such as the window or most accessible container/component
The parent argument (if supplied) simply allows the dialog to act as a modal (blocking) dialog for the window which contains the supplied component. This requires the user to have to dismiss the dialog before they can continue to interact with the parent window/component
Take a closer look at How to Make Dialogs for more details
Is there a simple way in Java to create a dialog that will not let you change focus from it until it has been closed? Such as the windows dialogs that gray out the entire screen and only let you interact with it until you satisfy it.
You can easily do this using a JDialog
JDialog dialog = new JDialog(Frame owner, "My modal dialog", **true**)
You can make your dialog modal which blocks user input. From Oracle modality tutorial:
Modal dialog box — A dialog box that blocks input to some other
top-level windows in the application, except for windows created with
the dialog box as their owner. The modal dialog box captures the
window focus until it is closed, usually in response to a button
press.
There are four types of Modality (again from tutorial):
Modeless type — A modeless dialog box does not block any other window while it is visible.
Document-modal type — A document-modal dialog box blocks all windows from the same document, except windows from its child
hierarchy. In this context, a document is a hierarchy of windows
that share a common ancestor, called the document root, which is
the closest ancestor window without an owner.
Application-modal type — An application-modal dialog box blocks all windows from the same application, except windows from its child
hierarchy. If several applets are launched in a browser environment,
the browser is allowed to treat them either as separate applications
or as a single application. This behavior is
implementation-dependent.
Toolkit-modal type — A toolkit-modal dialog box blocks all windows that run in the same toolkit, except windows from its child
hierarchy. If several applets are launched, all of them run with the
same toolkit. Hence, a toolkit-modal dialog box shown from an applet
may affect other applets and all windows of the browser instance that
embeds the Java runtime environment for this toolkit.
You can use JDialog to create your dialog. Just use one of the constructors that takes the modal flag and set modal to true. If you want you can specify one of the types above, but by default it will be APPLICATION_MODAL.
This is a simple constructor you can use:
public JDialog(Dialog owner, String title, boolean modal)
So you just add
JDialog dialog = new JDialog(owner, "My test modal dialog", true);
I'm making custom dialogs that I want to pop up and disable the main shell behind it so that it cannot be clicked while the dialog is active.
My initial plan was something like as follows:
shell.setEnabled(false);
doDialogStuff();
shell.setEnabled(true);
this worked but as I close the dialog, it loses focus of the shell that was open before the dialog. I managed to sort of fix it by adding
shell.setFocus();
after the last line but this is messy and causes the screen to flicker as the window loses and then gains focus in a split second, also, it sometimes doesn't regain focus and I can't understand why :/
Is there a better way to disable the background window without it losing focus.
Thanks in advance SO peeps
You should create a custom dialog based on this tutorial.
This way you just have to set the modality of the dialog to whatever you need exactly and the dialog will take care of the rest for you.
This should be helpful as well (Javadoc of Shell):
The modality of an instance may be specified using style bits. The modality style bits are used to determine whether input is blocked for other shells on the display. The PRIMARY_MODAL style allows an instance to block input to its parent. The APPLICATION_MODAL style allows an instance to block input to every other shell in the display. The SYSTEM_MODAL style allows an instance to block input to all shells, including shells belonging to different applications.
The proper thing to do is create the dialog as a modal window. When you create the dialog's shell you should do something like
dialogShell = new Shell(mainShell, PRIMARY_MODAL | DIALOG_TRIM);
I created a swing application on Windows OS. One of my JDialog (whose window is parentJFrame) shows a JOptionPane.
JOptionPane.showMessageDialog(parentJFrame, "I am a JOption"); .
At the run time, the parentJFrame setAlwaysOnTop(true) . Even though it has set alwaysOnTop-TRUE, the JOptionPane appeares on the parentJFrame on Windows OS. but When I ran it on Linux OS,JOptionPane displays behind the parentJFrame.(May be the reason is that parentJFrame alwyasOnTop is true, but how JRE runs the same application in different ways for diffrent OS s ?) How can I get it on the top of parentJFrame in Linux.? This is urgent please..
When a 'alwaysOnTop-true' component shows a JOptionPane, JOptionPane appears behind the component in Linux.. :( . But this handled well in Windows OS. JOptionPane is showed on the top of the component which is set 'alwaysOnTop-true' . It seemed that, there is a conflict Showing components on the desktop screen in Linux OS.. I m not sure so. But I guess it.
Linux OS has Oracle JDK and JRE 7
The behaviour you see on Linux is in accordance with the API specification. This is what it says for Window.setAlwaysOnTop():
If there are multiple always-on-top windows, their relative order is unspecified and platform dependent.
And also:
All windows owned by an always-on-top window inherit this state and automatically become always-on-top.
Which would explain why the JDialog that's at the heart of JOptionPane also has "always on top" status. Seems that on Windows by chance it works as you expected, but really you're asking Swing to do something impossible: To show the parent "always above other windows", but also to show the dialog on top of it.
Here's a possible workaround: Place the dialog next to the parent, so that while it's under it on the z-axis, the user will still see it:
JDialog dialog = new JOptionPane("Message").createDialog(parent, "Title");
Point dialogLoc = dialog.getLocation();
Point parentLoc = parent.getLocation();
dialog.setLocation(parentLoc.x + parent.getWidth(), dialogLoc.y);
dialog.setVisible(true);
Do note that there is no single "Linux OS", especially when it comes to window management - there are lots of different desktop environments and window managers that behave in widely different ways when it comes to window ordering and visibility, often deliberately.
This is very Simple : write this line of code after the code which you want to show ddialog box:
JOptionPane optionPane = new JOptionPane("Reports are Generated");
JDialog dialog = optionPane.createDialog("Success!");
dialog.setAlwaysOnTop(this.isAlwaysOnTopSupported());
dialog.setVisible(true);
Dont change anything exept Strings in double quotes.
I want to create in Java Swing a JDialog which, when it's open, its parent window cannot be accessed (just like when you open the file explorer dialog in Microsoft Word). Is there any method in the JDialog class that provides this behaviour?
use JDialog.setModal(true) before setting dialog visible
JDialog yourdialog = ...
yourdialog.setModal(true);
...
yourdialog.setVisible(true);
You have two options:
Use the static methods in JOptionPane. These will create modal dialogs by default:
Window parentWindow = SwingUtilities.getWindowAncestor(parentPanel);
JOptionPane.showMessageDialog(parentWindow, "Hello, World); // Create modal dialog aligned with parent window.
Create a JDialog explicitly:
Window parentWindow = SwingUtilities.getWindowAncestor(parentPanel);
JDialog dlg = new JDialog(parentWindow, ModalityType.APPLICATION_MODAL);
The first option is far simpler and I tend to prefer it particularly with modal dialogs.
Adamski and Jan both have the correct answers already, but I wanted to just make sure that the concept of a modal window is explained.
The OP asked about a dialog that blocks access to the parent. This is called a modal dialog (or a modal window). Wikipedia gives this definition:
In user interface design, a modal window is a child window that requires users to interact with it before they can return to operating the parent application
So, "modal" means that it will block parent windows (users cannot interact with any window besides the modal window), while "non-modal", or "modeless" means that the child and parent windows will be accessible at the same time.
This is a concept that exists in GUI frameworks in general, not just the Swing framework. In any GUI framework that you use, you can probably find this kind of functionality by looking for a modal property.
how about to lock JDialog inside his JFrame Parent ?
it's true that using JDialog.setModal capable to making jdialog just like dialog on other application. stopped all frame bofore jDialog closed