YesNo (Function)

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Features of the dialog box
Displaying the dialog box
Line break in the dialog box
Miscellaneous
Emulation
Application in the background: Specific case from Android 10

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See also

YesNo (Function)

In french: OuiNon

Displays a message in a standard dialog box that proposes "Yes" and "No" and returns the user's choice.

Remarks:

This is a blocking dialog box. To continue running the application, the user must validate one of the buttons.
To avoid blocking the application, use YesNoAsynchronous.
WINDEV allows you to apply the skin template of your project to this dialog box. For more details, see Customizing dialog boxes.

Example

// Exit choice
IF YesNo("Do you want to exit the program?") = Yes THEN
Close()
END

// Prerequisites: The WebDevYesNo internal window must have been created
YesNo(Yes,YesCode, NoCode, "Question?")

// "Yes" procedure
PROCÉDURE YesCode()
Trace("You clicked Yes")
RETURN True

// "No" procedure
PROCÉDURE NoCode()
Trace("You clicked No")
RETURN True

Syntax

Displaying a Yes/No dialog box Hide the details

<Result> = YesNo([<Selected button>, ] <Text> [, <Line 2> [... [, <Line N>]]])

<Result>: Integer constant

Identifies the button selected by the user:
No (or 0) The user selected [NO]
or closed the dialog box via the 'X' icon.
Yes (or 1) The user selected [YES]

<Selected button>: Optional integer constant

Button selected by default in the dialog box:
No (or 0) The "No" button is selected by default.
Yes (or 1)
(Default value) The "Yes" button is selected by default.

<Text>: Character string

Text to display.

<Line 2>: Optional character string

Text displayed on the second line.

<Line N>: Optional character string

Text displayed on the Nth line.

Displaying a Yes/No dialog box on the browser (WebDeVYesNo) Hide the details

YesNo([<Selected button>, ] <Code for Yes> , <Code for No> , <Text> [, <Line 2> [... [, <Line N>]]])

<Selected button>: Optional integer constant

Button selected by default in the dialog box:
No (or 0) [NO] button selected by default
Yes (or 1)
(Default value) [YES] button selected by default

<Code for Yes>: Character string

Code to run if the Yes button is chosen by the Web user. This parameter can correspond to:
the name of a button. If the Yes button is selected, the click code of this button will be run.
the name of a browser function or procedure. If the Yes button is selected, this procedure will be run.
a string or another value. If the Yes button is selected, the value will be run as being a JavaScript code.

<Code for No>: Character string

Code to run if the No button is chosen by the Web user. This parameter can correspond to:
the name of a button. If the No button is selected, the click code of this button will be run.
the name of a browser function or procedure. If the No button is selected, this procedure will be run.
a string or another value. If the No button is selected, the value will be run as being a JavaScript code.

<Text>: Character string

Text to display.

<Line 2>: Optional character string

Text displayed on the second line.

<Line N>: Optional character string

Text displayed on the Nth line.

Remarks

Features of the dialog box

The title of the dialog box corresponds to the title of the current window (or page).
To comply with the system specifications, the title of dialog box is empty by default. To define this title, use NextTitle.
To modify or define the title of dialog box, use NextTitle.

The message is aligned to the left.
The captions of buttons depend on the runtime language of Windows.
The maximum number of characters cannot exceed 4096. If a larger string is passed as parameter, it will be truncated.
The icon displayed (exclamation mark) cannot be modified.

To customize this dialog box (and all the system dialog boxes in your application), check "Customize system windows (Info, YesNo, Confirm, Dialog)" in the "Style" tab of the project description. For more details, see Customizing dialog boxes.

To customize this dialog box (and all the system dialog boxes in your site), check "Apply the skin to the dialog boxes (YesNo and OKCancel)" in the "Skin" tab of the project description window.

Displaying the dialog box

The dialog box does not lock other processes. The dialog box is displayed in the center of the page, with a DDW effect (Dim Disabled Windows).

YesNo uses the "WebDeVYesNo" internal page. To include this page in your project:

Click in the quick access buttons.
The new element window appears: click "Page" then "Page".
In the "Internal Page" tab, select the internal page named "Yes/No".
Validate. The "WebDeVYesNo" page appears in the editor.
Save the page by keeping its default name.

Line break in the dialog box

The CR string (Carriage Return) can be used to force a break to the next line. For example:

YesNo("The XXX form was modified." + CR + ...
"Do you want to save it before exiting?")

is equivalent to:

YesNo("The XXX form was modified.", ...
"Do you want to save it before exiting?")

You also have the ability to use the syntax of multiline strings. For example:

YesNo(
[
The XXX form has been modified.

Do you want to save changes before closing?
])

Miscellaneous

Timers (TimerSys) are not stopped when this function is called.
Windows events are not stopped when this function is called.
DelayBeforeClosing limits how long the message is displayed. The dialog box is automatically closed. For question or confirmation dialog boxes, the default button corresponds to the expected answer.
The text of the buttons is displayed in the system language.
The first syntax is not available in Active WEBDEV Pages.
If your project uses pre-launched sessions, this function must not be used in the project initialization event. This function must be used in the "Initialize project after connecting to the site" event.
This function must not be used:
- in the "Resize" event of the window. Otherwise, the application will be locked.
- in the "Change the orientation" event of the window.
- in the "Move to the foreground" event associated with the project.
  Remark: However, the function can be used in the "Move to the foreground" event of a window.
- in a thread.
The position of the buttons varies according to the Android version. From Android 4.1, the system sets the validation button on the right. Dialog is used to define the position of the buttons, if necessary.

Emulation

A YesNo message can be emulated by EmulateYesNo.

Application in the background: Specific case from Android 10

From Android 10, it is no longer possible to open a window when the application is in the background.

YesNo can open a window. If this function is used while the application is in the background, a fatal error will occur.

Tips:

It is possible to determine if the application is in the background using InBackgroundMode.
If an application needs to interact with the user while it is in the background, the solution is to display a notification (via the Notification type). The application will be brought back to the foreground when the notification is clicked, if the ActivateApplication property is set to True. You can also open a window from the procedure passed to the ActionClick property.

For more details, see Android 10: Behavior of applications in the background.

Business / UI classification: UI Code

Component: wd300obj.dll