ExecuteUpdateUI (Function)

ONLINE HELP
WINDEV, WEBDEV AND WINDEV MOBILE

Version:

Home | Sign in | English

This content has been translated automatically. Click here to view the French version.

Help / WLanguage / WLanguage functions / Controls, pages and windows / Window functions

"Request for refreshing the display" event
MVP: Presentation attribute

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

ExecuteUpdateUI (Function)

In french: ExécuteMiseAJourIHM

Warning
From version 25, this function is kept for backward compatibility. It is recommended to use ExecuteRefreshUI.

Immediately executes the "Request for refreshing the display" event of the window, page, internal window, internal page, control template or supercontrol.

If the function is called several times during a process, the refresh event will be run several times.

Note: This function is used in particular:

when refreshing the interface via threads.
when using MVP (Model - View - Presenter) programming. For more details, see Model - View - Presenter (MVP) F 9.

Example

ExécuteMiseAJourIHM()

Syntax

ExecuteUpdateUI([<Parameter 1> [... [, <Parameter N>]]])

<Parameter 1>: Type of value expected by the "Request for refreshing the display" event

First parameter that will be passed to the "Request for refreshing the display" event of the window or page.

<Parameter N>: Type of value expected by the "Request for refreshing the display" event

Nth parameter that will be passed to the "Request for refreshing the display" event of the window or page.

Remarks

"Request for refreshing the display" event

One of the events associated with the window (or page) is "Request for refreshing the display". This event is used to group together the code for updating the fields of the window (or page): field content, status (visible, grayed, etc.), label to be updated, etc.

This event can receive parameters. Simply declare a procedure in the event. For example:

// Demande de mise à jour de l'affichage
PROCEDURE DemandeMiseAjour(TypeMiseAJour is boolean)

This event is started upon request by the following functions:

RequestUpdateUI: Executes the "Request for refreshing the display" event at the end of the current process (asynchronous execution).
ExecuteUpdateUI Executes the "Display update request" event immediately.
RequestUpdateUIParent: Executes the "Request for refreshing the display" event of the higher level at the end of the current process (asynchronous execution).
ExecuteUpdateUIParent: Immediately executes the "Request for refreshing the display" event of the higher level.

When these functions are called, you can specify the value of the parameters expected by "Request for refreshing the display".

Note: The "Display update request" event can also be executed immediately with the ExecuteProcess function, using the following syntax:

ExecuteProcess(<Element name>, trtRequestRefresh)

MVP: Presentation attribute

The presenter attribute is used to associate a class of the presenter layer with a view (window, page or report). This attribute is mainly used in the global declaration of the windows generated by the MVP RAD.

For example:

PROCEDURE FEN_Table_MonFichierExemple(...
	gclPresentation is PTableMonFichierExemple dynamic <presenter>=Null)

When this attribute is used, the call to the "Request for refreshing the display" event of the window (or page) will be triggered by:

any call to RequestUpdateUI from a class declared as <presenter>,
any call from any class associated with the <presenter> class.

For more details, see RAD MVP: "presentation" attribute.

Business / UI classification: Neutral code

Component: wd300vm.dll