RequestRefreshUI

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Controls, pages and windows

Window management functions

RequestRefreshUI

Presentation

Example

"Request for refreshing the display" event

"Presenter" attribute

Constants for managing the windows

Constants for object visibility

ExecuteRefreshUIParent

FullScreen

Functions for managing windows

RequestRefreshUIParent

WinGiveSuitableHeight

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

"Request for refreshing the display" event
"Presenter" attribute

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

RequestRefreshUI

In french: DemandeMiseAJourUI

Requests the execution of the event "Request display update" (and returns the hand without waiting for the execution of the event).

This function is mainly used:

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

Remark: This function is equivalent to RequestRefreshUI.

Example

// Process records
// The graphic interface will have to be refreshed
RequestRefreshUI()

// -----------------------------------------------------------------
// -- Request for refreshing the display of WIN_Contact_Form
// Refresh the title of the window
MySelf.Title = gpclContactForm.p_sFullname

// Refresh the linked controls of the window
SourceToScreen()

Syntax

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

<Parameter 1>: Optional parameter corresponding to the type expected by the event "Request for refreshing the display"

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

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

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

Remarks

"Request for refreshing the display" event

One of the events associated with the window is "Request for refreshing the display". This event is used to group the code for refreshing the window controls: content of controls, status (visible, grayed, etc.), caption to refresh, etc, ... This event is available on windows, internal windows, pages, internal pages, field templates and superfields.

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

// Request for refreshing the display
PROCEDURE AskForRefresh(RefreshType is boolean)

This event is started upon request by the following functions:

RequestRefreshUI: Runs the event "Request for refreshing the display" at the end of the current process (asynchronous execution).
ExecuteRefreshUI: Immediately runs the event "Request for refreshing the display".
RequestRefreshUIParent: Runs the event "Request for refreshing the display" of the higher level at the end of the current process (asynchronous execution).
ExecuteRefreshUIParent: Immediately runs the event "Request for refreshing the display" of the higher level.

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

Remarks:

The element whose event "Request for display update" is executed depends on the code from which the function RequestRefreshUI was called up. 0
If the function RequestRefreshUI is called several times, new calls using the same parameters as calls not yet executed are ignored.
If function RequestRefreshUI is called in main the thread, the execution(s) of the event "Request for display update" will be performed at the end of the current processing.
If the RequestRefreshUI function is called in a secondary thread, the execution(s) of the "Display Update Request" event will occur when the window is refreshed.

"Presenter" 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 in WINDEV.

For example:

PROCEDURE WIN_Table_MyExampleFile(...
gclPresenter is PTableMyExampleFile dynamic<presenter>=Null)

Thanks to this attribute, the call of the "Display Update Request" event in the window will be triggered by:

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

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

Component : wd260vm.dll