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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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Stored procedures
Displays a message in a standard dialog box that proposes "OK" and "Cancel" and returns the user's choice.
OK / Cancel dialog
Remarks:
  • This is a blocking dialog box. To continue running the application, the user must validate one of the buttons.
    WINDEVAndroidiPhone/iPad To avoid blocking the application, use OKCancelAsynchronous.
  • WINDEV WINDEV allows you to apply the skin template of your project to this dialog box. For more details, see Customizing dialog boxes.
Example
WINDEVWEBDEV - Server codeReports and QueriesUniversal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC)
// Delete a line with confirmation (yes by default)
IF OKCancel("Delete this record?") THEN
HDelete(CUSTOMER)
END
WINDEVReports and QueriesUniversal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC)
// Choice used to exit the program
IF OKCancel("Do you want to exit from the program?") = Yes THEN
Close()
END
WINDEVWEBDEV - Server codeReports and QueriesUniversal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC)
// Ask to confirm the deletion of the file whose
// name is found in the FILE_NAME variable, with
// positioning on the "No" button in the OKCancel window
IF OKCancel(No, "Delete the file?") THEN
fDelete(FILE_NAME)
END
Syntax
WINDEVWEBDEV - Server codeReports and QueriesUniversal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC)

Displaying an OK/Cancel dialog box Hide the details

<Result> = OKCancel([<Selected button>, ] <Text> [, <Line 2> [... [, <Line N>]]])
<Result>: Boolean
Identifies the button selected by the user:
FalseThe "Cancel" button was chosen by the user.
TrueThe "OK" button was chosen by the user.
<Selected button>: Optional boolean
Button selected by default in the dialog box:
No"Cancel" button selected by default.
True
(by default)
"OK" button selected by default.
<Text>: Character string
Text to display.
<Line 2>: Optional character string
Text displayed in the following lines.
<Line N>: Optional character string
Text displayed in the following lines.
WEBDEV - Browser code

Displaying an OK/Cancel dialog box on the browser Hide the details

OKCancel([<Selected button>, ] <Code for OK> , <Code for cancel> , <Text> [, <Line 2> [... [, <Line N>]]])
<Selected button>: Optional boolean
Button selected by default in the dialog box:
No"Cancel" button selected by default.
True
(by default)
"OK" button selected by default.
<Code for OK>: Character string
Code to run if the OK button is chosen by the Web user. This parameter can correspond to:
  • the name of a button. If the OK button is selected, the click code of this button will be run.
  • the name of a browser function or procedure. If the OK button is selected, this procedure will be run.
  • a string or another value. If the OK button is selected, the value will be run as being a JavaScript code.
<Code for cancel>: Character string
Code to run if the Cancel button is chosen by the Web user. This parameter can correspond to:
  • the name of a button. If the Cancel button is selected, the click code of this button will be run.
  • the name of a browser function or procedure. If the Cancel button is selected, this procedure will be run.
  • a string or another value. If the Cancel 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 in the following lines.
<Line N>: Optional character string
Text displayed in the following lines.
Remarks

Features of the dialog box

  • The title of the dialog box corresponds to the title of the current window (or page).
    AndroidiPhone/iPad 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.
WINDEV 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.
WEBDEV - Server code 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.
WEBDEV - Browser code

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).
OKCancel uses the internal page named "WEBDEVOKCancel". To include this page in your project:
  1. Click in the quick access buttons.
  2. The creation window appears: click "Page" then "Page".
  3. Click "Internal page" in the wizard and select the internal page named "OK/Cancel".
  4. Validate. The "WEBDEVOKCancel" page is displayed in the editor.
  5. 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:
IF OKCancel("Caution: you are going to delete this record" + CR + ...
"Do you want to continue?") THEN
HDelete(CUSTOMER)
END
is equivalent to:
IF OKCancel("Caution: this record will be deleted", ...
"Do you want to continue?") THEN
HDelete(CUSTOMER)
END
You also have the ability to use the syntax of multiline strings. For example:
OKCancel(
[
Caution: you are going to delete this record.
 
Do you want to continue?
])
WINDEVWEBDEV - Server codeReports and QueriesUniversal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC)

Miscellaneous

  • Timers (TimerSys) are not stopped when this function is called.
  • WINDEV Windows events are not stopped when this function is called.
  • WINDEV 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.
  • WINDEVJava 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.
  • WEBDEV - Server code If your project uses pre-launched sessions, this function must not be used in the "Initializing" event of the project. This function must be used in the event "Initializing the project after connection to the site".
  • iPhone/iPad 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.
WINDEV

Emulation

To emulate an OKCancel message, use EmulateOKCancel.
Android

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.
OKCancel 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.
Business / UI classification: UI Code
Component: wd270obj.dll
Minimum version required
  • Version 9
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Comments
Exemplo OkCancel
Exemplo OkCancel

IF OKCancel("Vamos Gravar") THEN
//Comandos
Info("Comandos")
END

//Blog com Video e exemplo
http://windevdesenvolvimento.blogspot.com.br/2016/07/curso-windev-funcoes-dialogo-2-okcancel.html
https://www.youtube.com/watch?v=ECbkPsdEoIY
De matos AMARILDO
10 Jul. 2016