FORM LOAD
FORM LOAD ( {aTable ;} form {; formData}{; *} )
| Parámetros | Tipo | Descripción | |
|---|---|---|---|
| aTable | Tabla | → | Formulario tabla a cargar (si se omite, carga un formulario proyecto) |
| form | Text, Object | → | Name (string) of form (project or table), ora POSIX path (string) to a .json file describing the form, or an object describing the form to open |
| formData | Object | → | Data to associate to the form |
| * | Operador | → | If passed = command applies to host database when it is executed from a component (parameter ignored outside of this context) |
Descripción
The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents.The FORM LOAD command is used to load the form in memory in the current process along with formData (optional) in order to print its data or parse its contents. There can only be one current form per process.
En el parámetro form, puede pasar:
- el nombre de un formulario, o
- the path (in POSIX syntax) to a valid .json file containing a description of the form to use, or
- an object containing a description of the form.
When the command is executed from a component, it loads the component forms by default. If you pass the * parameter, the method loads the host database forms.
formData
Opcionalmente, puede pasar parámetros al form usando el objeto formData o el objeto de clase form automáticamente instanciado por 4D si has asociado una clase de usuario al formulario. Any properties of the form data object will then be available from within the form context through the Form command.
El objeto de datos del formulario está disponible en el evento de formulario On Load.
Para obtener información detallada sobre el objeto de datos del formulario, consulte el comando DIALOG.
Impresión de datos
In order to be able to execute this command, a print job must be opened beforehand using the OPEN PRINTING JOB command. The OPEN PRINTING JOB command makes an implicit call to the FORM UNLOAD command, so in this context it is necessary to execute FORM LOAD. Once loaded, this form becomes the current printing form. All the object management commands, and in particular the Print object command, work with this form.
If a printing form has already been loaded beforehand (via a previous call to the FORM LOAD command), it is closed and replaced by form. You can open and close several project forms in the same print session. Changing the printing form via the FORM LOAD command does not generate page breaks. It is up to the developer to manage page breaks.
Only the On Load form event is executed during the opening of the project form, as well as any object methods of the form. Other form events are ignored. The On Unload form event is executed at the end of printing.
To preserve the graphic consistency of forms, it is recommended to apply the "Printing" appearance property regardless of the platform.
The current printing form is automatically closed when the CLOSE PRINTING JOB command is called.
Parsing form contents
This consists in loading an off-screen form for parsing purposes. To do this, just call FORM LOAD outside the context of a print job. In this case, form events are not executed.
FORM LOAD can be used with the FORM GET OBJECTS and OBJECT Get type commands in order to perform any type of processing on the form contents. You must then call the FORM UNLOAD command in order to release the form from memory.
Note that in all cases, the form on screen remains loaded (it is not affected by the FORM LOAD command) so it is not necessary to reload it after calling FORM UNLOAD.
Reminder: In the off-screen context, do not forget to call FORM UNLOAD to avoid any risk of memory overflow.
Ejemplo 1
Llamada a un formulario proyecto en un trabajo de impresión:
OPEN PRINTING JOB
FORM LOAD("print_form")
// ejecución de eventos y de métodos objeto
Ejemplo 2
Calling a table form in a print job:
OPEN PRINTING JOB
FORM LOAD([People];"print_form")
// ejecución de eventos y de métodos objeto
Ejemplo 3
Parsing of form contents to carry out processing on text input areas:
FORM LOAD([People];"my_form")
// selection of form without execution of events or methods
FORM GET OBJECTS(arrObjNames;arrObjPtrs;arrPages;*)
For($i;1;Size of array(arrObjNames))
If(OBJECT Get type(*;arrObjNames{$i})=Object type text input)
//… processing
End if
End for
FORM UNLOAD //do not forget to unload the form
Ejemplo 4
The following example returns the number of objects on a JSON form:
ARRAY TEXT(objectsArray;0) //sort form items into arrays
ARRAY POINTER(variablesArray;0)
ARRAY INTEGER(pagesArray;0)
FORM LOAD("/RESOURCES/OutputForm.json") //load the form
FORM GET OBJECTS(objectsArray;variablesArray;pagesArray;Form all pages+Form inherited)
ALERT("The form contains "+String(size of array(objectsArray))+" objects") //return the object count
el resultado mostrado es:
Ejemplo 5
You want to print a form containing a list box. During the on load event, you want the contents of the list box to be modified.
1. En el método de impresión, usted escribe:
var $formData : Object
var $over : Boolean
var $full : Boolean
OPEN PRINTING JOB
$formData:=New object
$formData.LBcollection:=New collection()
... //fill the collection with data
FORM LOAD("GlobalForm";$formData) //store the collection in $formData
$over:=False
Repeat
$full:=Print object(*;"LB") // the datasource of this "LB" listbox is Form.LBcollection
LISTBOX GET PRINT INFORMATION(*;"LB";lk printing is over;$over)
If(Not($over))
PAGE BREAK
End if
Until($over)
FORM UNLOAD
CLOSE PRINTING JOB
2. In the form method, you can write:
var $o : Object
Case of
:(Form event code=On Load)
For each($o;Form.LBcollection) //LBcollection is available
$o.reference:=Uppercase($o.reference)
End for each
End case
Ver también
Current form name
FORM UNLOAD
LISTBOX GET OBJECTS
OBJECT Get type
Print object
Propiedades
| Número de comando | 1103 |
| Hilo seguro | ✗ |