InfoAsynchronous (Function)

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WLanguage

WLanguage functions

Standard functions

Windows management functions

Dialog Box functions

WLanguage procedure

InfoAsynchronous

Presentation

Example

Features of the dialog box

Line break in the dialog box

Special cases

Application in the background: Specific case from Android 10

See also

InfoAsynchronous (Function)

In french: InfoAsynchrone

Displays a non-blocking custom message in a system information window.

Remarks:

This is a non-blocking information window. The WLanguage code that follows the call to InfoAsynchronous continues to run. To close the window, the user must click the OK button to validate. When the user clicks "OK", the code of a WLanguage procedure can be run.
In the WLanguage code following the call to the function, another modal window cannot be opened before closing the dialog box.
WINDEV allows you to apply the skin template of your project to this dialog box. For more details, see Customizing dialog boxes.

Example

User_Name is string
User_Name = "Florence"
InfoAsynchronous("Hello" + User_Name, "Welcome!", MyProcedure_Info)

INTERNAL PROCÉDURE MyProcedure_Info()
ToastDisplay("Close info")
END

Syntax

InfoAsynchronous(<Text> [, <WLanguage procedure>])

<Text>: Character string

Text to display.

<WLanguage procedure>: Optional name of procedure or lambda procedure

Name of the WLangage procedure ("callback") called when the user clicks "OK" in the information window.
This WLanguage procedure can correspond to:
a name of a global procedure,
a name of an internal procedure,
a lambda procedure.
If this parameter is not specified, no procedure is run when the user clicks "OK" in the information window.

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 entire string is displayed, regardless of its size.
The icon displayed (information tooltip) 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.

Line break in the dialog box

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

InfoAsynchronous("The XXX form was modified." + CR + "This form will be saved.")

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

InfoAsynchronous(
[
The XXX form has been modified.

This form will be saved.
])

Special cases

Timers (TimerSys) are not stopped when this function is called.
Windows events are not stopped when this function is called.
You can use the code wizard to enter the function in the code editor. Depending on the characteristics entered in the wizard, the function used can be different in the code that is automatically generated.
The text of the buttons is displayed in the system language.
This function must not be used:
- in the event "Resizing" of the window. Otherwise, the application will be locked.
- in the event "Changing the orientation" of the window.
- in the event "Move to the foreground" associated with the project.
  Remark: However, the function can be used in the event "Move to the foreground" of a window.
- in a thread.

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.

InfoAsynchronous 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.

Component: wd270obj.dll