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Version: 4.x

Object blocks

Object block of the FORM statement adds objects (including object groups) to the form structure, as well as object trees to the interactive form view.

Object block​

Syntax​

OBJECTS groupDeclaration1 [groupOptions1], ...., groupDeclarationN [groupOptionsN]

Each groupDeclaration is a declaration of an object group consisting of several objects:

[groupName =] (objectDeclaration1, ..., objectDeclarationK)

or an object group consisting of a single object:

objectDeclaration

Each objectDeclaration declaring an object has the following syntax:

[[name] [caption] =] classId [ON CHANGE actionId(param1, ..., paramM) | { actionOperator } ]

The declaration of each object group may be followed by a set of options called groupOptions:

viewType
INIT | FIXED
PAGESIZE pageSize 
AFTER groupName
BEFORE groupName
defaultObjectsType
IN propertyGroup
EXTID extID
SUBREPORT [subReportExpression]

Description​

A single OBJECTS block can contain several comma-delimited declarations of object groups. An object group can contain just one object or several ones. In case of a single object, you can use simplified syntax without specifying the name of an object group and using parentheses. The declaration of an object group may be followed by the options of this group. They are listed one after another in an arbitrary order.

Parameters​

  • groupName

    Name of an object group. Simple ID. Must be specified if you need to access an object group consisting of several objects. If an object group consists of a single object, the name of the object group will be equal to the name of the object and doesn't need to be specified.

  • name

    Object name. Simple ID. Must be specified if the object class is a built-in class. If the object class is a custom class, the name doesn't need to be specified. In this case, it will be equal to the name of the class object.

  • classId

    Object class ID.

  • caption

    Caption of the object being added. String literal. If the caption is not specified, the class caption will become the object caption.

  • ON CHANGE actionName(param1, ..., paramM) | { actionOperator }

    Specifying an action that will be called when the current object value is changed.

    • actionID

      Action ID.

    • param1, ..., paramM

      A list of object names on the form that will be used as action parameters. The number of these objects must be equal to the number of action parameters. The name of the object is defined with a simple ID.

    • actionOperator

      Context-dependent action operator. You can use the names of already declared objects on the form as parameters.

Object group options​

  • viewType

    Default view for an object group. It is specified with one of the keywords:

    • PANEL - panel view.
    • TOOLBAR - toolbar display mode.
    • GRID - table column view;. Used by default.

  • PAGESIZE pageSize

    Specification of the number of readable objects in the table. By default, the quantity is determined dynamically depending on the size of the component in the user interface and equals to 3 * <number of visible rows in the table>. A value of 0 means that all objects must be read.

  • AFTER groupName

  • BEFORE groupName

    Specifying that the object tree should be added to the form structure immediately before (keyword BEFORE) or after (keyword AFTER) of a specified object group. Typically used with the form extension mechanism . If a group is added before the group in a tree, then this group should the first in this tree. Accordingly, if a group is added after the group in a tree, this group should be the last in this tree.

  • defaultObjectsType

    Specifying which object collection from the added object group will be current after the change of the active filters:

    • FIRST– specifies that the first object collection will be the default objects
    • LAST - last one
    • PREV - previous one

    If this option is not specified, the platform determines the option to be used depending on the current filters.

  • IN propertyGroup

    Specifying the property/action group that the object group belongs to. Used only in the hierarchical view.

  • EXTID extID

    Specifying the name to be used for export/import operations performed by this object group. Used only in the structured view.

    • extId

      String literal.

  • SUBREPORT [subReportExpression]

    Specifies that you need to generate a separate report file for this object group while building the report hierarchy.

    • subReportExpression

      The expression whose value will be used as the name of the report file for the created object group. You can use the names of already declared objects on the form as parameters. It is assumed that the values of these objects will be passed when the form is opened in the print view (if it's not done, they will be considered equal NULL).

Examples​

CLASS Shipment;
// declaring the delivery form
FORM shipments 'Deliveries'
    OBJECTS s = Shipment // adding one object of the shipment class
                        PAGESIZE 100 // indicating that the table should always contain 100 rows

    // ... adding properties and filters to the form
;

// Declaring a form that will display the turnover of the product for a specified interval
name = DATA STRING[100] (Item);
revenue = DATA NUMERIC[16,2] (Item, DATE, DATE);

FORM revenues 'Product turnovers'
    // declaring a group of objects, consisting of 2 objects of the Date class with the appropriate captions,
    // which will always be displayed as a panel
    OBJECTS interval = (dateFrom 'Date (from)' = DATE, dateTo 'Date (to)' = DATE) PANEL, 
            i = Item // adding a list of products
    // adding to the form the properties of the date objects values, with which the user can select dates
    PROPERTIES VALUE(dateFrom), VALUE(dateTo) 
    // adding the product name and the property with the product turnover for the date interval
    PROPERTIES name(i), revenue(i, dateFrom, dateTo) 
;
// creating a form for printing a price tag for a product
labelFile = DATA STRING[100] (Item);
printLabelFile (Item i)= OVERRIDE labelFile(i), 'MyModule_printLabel_i.jrxml' IF i IS Item;
FORM printLabel 'Price tag printing'
    OBJECTS i = Item  // adding the product for which the price tag will be printed
    // marking that a file whose name is stored in the printLabelFile property should be used as a template 
    // (it is assumed that the i value will be passed in the OBJECTS block)
    REPORT printLabelFile(i)       
    // for example, the user can input myLabel1.jrxml there, then the system will use a file named myLabel1.jrxml
    //  ... other properties required for printing
;

Object tree block​

Syntax​

TREE [name] groupDeclaration1 [parentBlock1], ...., groupDeclarationN [parentBlockN] [treeOptions]

Each groupDeclaration is a declaration of an object group that is similar to the declaration in an object block described above. Each parentBlock can be described in one of the following ways:

PARENT propertyId
(PARENT propertyId1, ..., propertyIdK)

The first option is used if an object group for which the block is specified consists of a single object, the second one is used for groups of two and more objects.

The treeOptions options set may be specified after the declaration of each object tree.

AFTER groupName
BEFORE groupName

Description​

Object tree block lets you create an object tree. The first specified object group will form a list of top-level objects, each of which will have a child list of objects of the second specified object group and so on.

Use the PARENT block to create hierarchical object groups. To do that, specify a property that will define the parent element for an object (or several objects if an object group contains several ones).

Parameters​

  • name

    The name of the object tree being created. Simple ID.

  • propertyId

    ID of the property defining the hierarchy for an object group consisting of a single object. The specified property must have a single parameter and return the parent object of the passed object as its value (or NULL if the passed object is the top one).

  • propertyId1, ..., propertyIdK

    A list of property ID's defining the hierarchy for an object group consisting of several objects. All specified properties must have the same number of parameters as the number of objects in the object group. Each of these properties must return one of the parent objects of the passed objects as a value (or NULL if the passed object collection is the top one). The first property should return the first parent object, the second property - the second object, etc. on.

Object tree options​

  • AFTER groupName

  • BEFORE groupName

    Specifying that the object tree should be added to the form structure immediately before (keyword BEFORE) or after (keyword AFTER) of a specified object group. Typically used with the form extension mechanism . If a group is added before the group in a tree, then this group should the first in this tree. Accordingly, if a group is added after the group in a tree, this group should be the last in this tree.

  • groupName

    Object group name.

Examples​

CLASS SkuGroup;
name = DATA ISTRING[100] (SkuGroup);
active = DATA BOOLEAN (SkuGroup);
parent = DATA SkuGroup (SkuGroup) AUTOSET;

CLASS Sku;
name = DATA ISTRING[100] (Sku);
skuGroup = DATA SkuGroup (Sku);


FORM skus 'Sku'
    TREE groupTree g=SkuGroup PARENT parent(g)
    PROPERTIES READONLY name(g)
    FILTERS active(g)

    OBJECTS s = Sku
    PROPERTIES(s) name
    FILTERS skuGroup(s) == g
;

CLASS Group1;
name = DATA STRING[100] (Group1);

CLASS Group2;
name = DATA STRING[100] (Group2);

CLASS Group3;
name = DATA STRING[100] (Group3);

in = DATA BOOLEAN (Group1, Group2);
in = DATA BOOLEAN (Group2, Group3);

FORM groups
    TREE groups g1 = Group1, g2 = Group2, g3 = Group3
    PROPERTIES READONLY name(g1), name(g2), name(g3)
    FILTERS in(g1, g2), in(g2, g3)
;