ACTIVATE GROUPBOX

7.8.5, PLBCMP GUI Only

The ACTIVATE GROUPBOX statement makes a GROUPBOX visible and allows the user to interact with it. An optional execution label may be provided to process information if the user selects the GROUPBOX. The instruction uses the following format:

Where:

label

Optional. A Program Execution Label.

groupbox

Required. The name of a previously created GROUPBOX object variable or a pointer to a GROUPBOX object.

routine

Optional. A program execution label called when a mouse click occurs within the screen boundaries of the object.

result

Optional. A previously defined Numeric Variable in which the result code as described below is placed upon object selection.

Flags Affected: NONE

Note the following:

1. If the {routine} and {result} operands are not provided, the runtime performs no default action.

2. If the {result} operand is specified, it is set to a nine-digit number describing the screen position that where the mouse click occurred. The bottom four digits describe the vertical position and the next four digits describe the horizontal position. The ninth digit describes which button was clicked as follows:
    

Value	Meaning
0	The left mouse button was clicked.
1	The right mouse button was clicked.
2	The left mouse button was double clicked.
3	The right mouse button was double clicked.

3. If the {result} operand is too small to contain the value, the OVER flag is set upon entry to the {routine}. This flag setting does not occur at the time of the ACTIVATE butat the time the {routine} is called.

4. The {routine} is called when a mouse click occurs within the screen boundaries of the GROUPBOX.

5. The {routine} is called as if a CALL instruction was performed. It is only called when an EVENTCHECK or EVENTWAIT is executed.

6. When an operator performs a double click action, the {routine} is called once for each click. The ninth digit of the {result} operand distinguishes between the clicking actions.

7. When the {routine} is complete, a RETURN instruction continues execution at the instruction following the EVENTWAIT or EVENTCHECK. Otherwise, a NORETURN instruction should be executed to clear the return address from the call stack.

8. If the object specified by an ACTIVATE instruction is already active, the old {routine} and {result} operands are replaced with the new {routine} and {result} operands.

9. An object must be CREATEd before it is activated. If this is not done, a runtime error of O105 is generated.

10. If insufficient memory is available to perform the operation, a runtime error O106 is generated.

11. If a FILEPI instruction is active, it is terminated.

See Also: Example Code, ACTIVATE, DEACTIVATE, Object Output Instructions