Dialog

While open, the dialog widget ensures that keyboard navigation using the 'tab' key causes the focus to cycle amongst the focusable elements in the dialog, not elements outside of it. Modal dialogs additionally prevent mouse users from clicking on elements outside of the dialog.

The dialog widget uses the jQuery UI CSS framework to style its look and feel. If dialog specific styling is needed, the following CSS class names can be used for overrides or as keys for the classes option:

Dialog

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The dialog widget is built with thewidget factory and can beextended. When extending widgets, you have the ability to override or add to thebehavior of existing methods. The following methods are provided as extension pointswith the same API stability as the plugin methods listedabove. For more information on widget extensions, seeExtendingWidgets with the Widget Factory.

Form dialogs allow users to fill out form fields within a dialog.For example, if your site prompts for potential subscribers to fill in their email address, they can fill out the email field and touch 'Submit'.

Confirmation dialogs require users to explicitly confirm their choice before an option is committed.For example, users can listen to multiple ringtones but only make a final selection upon touching "OK".

You can create a draggable dialog by using react-draggable.To do so, you can pass the imported Draggable component as the PaperComponent of the Dialog component.This will make the entire dialog draggable.

Note: On Windows and Linux an open dialog can not be both a file selectorand a directory selector, so if you set properties to['openFile', 'openDirectory'] on these platforms, a directory selector will beshown.

The browserWindow argument allows the dialog to attach itself to a parent window, making it modal.If browserWindow is not shown dialog will not be attached to it. In such case it will be displayed as an independent window.

This API can be called safely before the ready event the app module emits,it is usually used to report errors in early stage of startup. If calledbefore the app readyevent on Linux, the message will be emitted to stderr,and no GUI dialog will appear.

On macOS, this displays a modal dialog that shows a message and certificateinformation, and gives the user the option of trusting/importing thecertificate. If you provide a browserWindow argument the dialog will beattached to the parent window, making it modal.

When the dialog's open prop is true, the contents of the dialog will render. Focus will bemoved inside the dialog and trapped there as the user cycles through the focusable elements. Scrollis locked, the rest of your application UI is hidden from screen readers, and clicking outside theDialog.Panel or pressing the Escape key will fire the close event and close thedialog.

If your dialog has a title and description, use the Dialog.Title and Dialog.Descriptioncomponents to provide the most accessible experience. This will link your title and descriptionto the root dialog component via the aria-labelledby and aria-describedby attributes, ensuringtheir contents are announced to users using screenreaders when your dialog opens.

Dialogs have no automatic management of their open/closed state. To show and hide your dialog, passReact state into the open prop. When open is true the dialog will render, and when it's falsethe dialog will unmount.

The onClose callback fires when an open dialog is dismissed, which happens when the user clicksoutside the your Dialog.Panel or presses the Escape key. You can use this callback toset open back to false and close your dialog.

When creating a scrollable dialog with a backdrop, make sure the backdrop is rendered behind thescrollable container, otherwise the scroll wheel won't work when hovering over the backdrop, andthe backdrop may obscure the scrollbar and prevent users from clicking it with their mouse.

For accessibility reasons, your dialog should contain at least one focusable element. By default,the Dialog component will focus the first focusable element (by DOM order) once it is rendered,and pressing the Tab key will cycle through all additional focusable elements within the contents.

Focus is trapped within the dialog as long as it is rendered, so tabbing to the end will startcycling back through the beginning again. All other application elements outside of the dialog willbe marked as inert and thus not focusable.

To animate the opening/closing of the dialog, use the Transition component. Allyou need to do is wrap the Dialog in a , and dialog will transition automaticallybased on the state of the show prop on the .

If you want to animate your dialogs using another animation library like FramerMotion or React Spring and needmore control, you can use the static prop to tell Headless UI not to manage rendering itself, andcontrol it manually with another tool:

Though similar in style to CDK, it is different, being a script-interpreter which provides a set of curses widgets. Widgets are objects whose appearance and behavior can be customized. There is a much-reduced variation of dialog, called lxdialog, which is used in Linux kernel configuration.

The main use of this version of dialog was reportedly sysinstall. That was replaced by this version of dialog for FreeBSD 9.0 by Nathan Whitehorn and others. I made improvements to dialog to help with this starting early in 2011, adding these options:

I became involved with dialog for the same reason as Cdk: they were the most well-known applications using ncurses, and I realized that they were not being maintained well enough to reflect ncurses' capabilities.

At the end of 2005, I relicensed dialog as LGPL. It was GPL before, which made it (the dialog library in particular) unusable by developers of non-GPL programs. After several requests, I discussed this with Santiago Vila (the Debian package maintainer), indicating my intention to audit the code, and remove as needed any fragments predating my work.

Here are installed sizes from Debian 5.0 (32-bit) and 6.0 (64-bit). I included both releases to provide a comparison with Xdialog. It is apparent that the installed size counting required libraries is always lowest for dialog, even when it has more than twice the functionality of the next smallest (whiptail).

Debian (and derived distributions such as Ubuntu) are a special case for compatibility concerns because their installer uses terminal-based scripts extensively and there is some attempt to use either dialog or whiptail.

Interestingly, the popularity contest (in which I do not participate) seems to show dialog due to installation bias of Debian has half the popularity of whiptail. The two are not installed on an equal basis because dialog is "optional" while whiptail is "important". Here is an extract of the relevant information as I am documenting dialog 1.2:

The count for zenity can be explained in part because that program is not really compatible with either dialog or whiptail. Thus, it is likely that there are scripts which cannot be used by other programs (reviewing the package dependencies makes this apparent: only one depends on either dialog or zenity).

Xdialog's author paid attention to compatibility, making a good attempt at working with scripts that dialog would work with. He added many widgets, some of which are viable in a terminal enviroment. I have adapted the most useful of those.

The point in reviewing whiptail's history is to see when features were added which affect compatibility with dialog.

Here is a table showing whiptail's command-line options, together with the corresponding dialog option, dates and related bug reports which motivate their respective changes. The dates for whiptail are from its git repository for commits; they are not release dates (and you may notice that Debian's updates were not rapidly applied upstream).

Early on, there was some discussion of making dialog compatible with the options recognized by whiptail. Santiago Vila (the Debian package maintainer for dialog) mentioned this, and I made improvements, e.g., in 2000/02/22. Joey Hess made a point of providing similar changes (such as the --passwordbox option) to improve both programs.

Although whiptail is given a higher priority (important) in Debian than dialog (optional), some packagers either expressed a preference for dialog's additional functionality, or used the features which work with both. In Debian 6 for instance, I see these counts from /var/lib/dpkg/available:

Two of those (--output-fd and --passwordbox) are clearly the work of Joey Hess. One was adapted from my work.

In each case, the manpage description is (except for changing "dialog" to "whiptail") identical. The two options implemented by Joey Hess provided manpage updates. The other two were copied from dialog.

The early Debian package for newt noted above adapted a manpage from dialog. It describes the --gauge option. That text was copied from the manpage for dialog 0.6, but (noting that Marc Ewing's name was not in the manpage, rather it was in the README file) the Debian maintainers did not provide attribution for him either. The disclaimer at the end "based on" is too generous (to the Debian maintainer), since the work involved consisted of no more than removing the description of --create-rc and changing "dialog" to "whiptail" throughout. ff782bc1db