TypeOf
PowerScript function
Description
Determines the type of an object or control, reported as a value of
the Object enumerated datatype.
Applies to
Any object
Syntax
|
1 |
objectname.TypeOf ( ) |
|
Argument |
Description |
|---|---|
|
objectname |
The name of the object or control for which you want the |
Return value
Object enumerated datatype. Returns the type of objectname. If
objectname is null, TypeOf returns null.
Usage
Use TypeOf to determine the type of a selected or dragged
control.
Examples
If dw_Customer is a DataWindow control, this statement returns
DataWindow!:
|
1 |
dw_Customer.Typeof() |
This example looks at the first five controls in the w_dept window’s
Control array property. The loop executes some statements for each control
that is a CheckBox:
|
1 2 3 4 5 6 |
integer n FOR n = 1 to 5 IF w_dept.Control[n].TypeOf() = CheckBox! THEN ... // Some processing END IF NEXT |
This loop stores in the winobject array the type of each object in
the window’s Control array property:
|
1 2 3 4 5 6 |
object winobjecttype[] long ll_count FOR ll_count = 1 to UpperBound(Control[]) winobjecttype[ll_count] = & TypeOf(Control[ll_count]) NEXT |
If you do not know the type of a control passed via PowerObjectParm
in the Message object, the following example assigns the passed object to
a graphic object variable, the ancestor of all the control types, and
assigns the type to a variable of type object, which is the enumerated
datatype that TypeOf returns. The CHOOSE CASE statement can include
processing for each control type that you want to handle. This code would
be in the Open event for a window that was opened with
OpenWithParm:
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
graphicobject stp_obj object type_obj stp_obj = Message.PowerObjectParm type_obj = stp_obj.TypeOf() CHOOSE CASE type_obj CASE DataWindow! MessageBox("The object"," Is a datawindow") CASE SingleLineEdit! MessageBox("The object"," Is a sle") ... // Cases for additional object types CASE ELSE MessageBox("The object"," Is irrelevant!") END CHOOSE |
See also