The OWA_IMAGE
package provides an interface to access the coordinates where a user clicked on an image.
See Also:
For more information about implementation of this package:The chapter contains the following topics:
Summary of OWA_IMAGE Subprograms
Overview
Types
Variables
Examples
Use this package when you have any image map whose destination links invoke the PL/SQL Gateway.
This data type (point
) contain the X
and Y
values of a coordinate, and so provides the coordinates of a user's click on an imagemap. It is defined as:
TYPE POINT IS TABLE OF VARCHAR2(32767) INDEX BY BINARY_INTEGER
This package variable (null_point
) of TYPE
POINT
is used to default point parameters. Both the X and the Y fields of this variable are NULL
.
CREATE OR REPLACE PROCEDURE process_image (my_img in OWA_IMAGE.POINT) AS x integer := OWA_IMAGE.GET_X(my_img); y integer := OWA_IMAGE.GET_Y(my_img); BEGIN /* process the coordinate */ END
Table 144-1 OWA_IMAGE Package Subprograms
Subprogram | Description |
---|---|
Gets the X value of a point type |
|
Gets the Y value of a point type |
This function returns the X
coordinate of the point where the user clicked on an image map.
OWA_IMAGE.GET_X( p IN point) RETURN INTEGER;
The X coordinate as an integer.
This function returns the Y coordinate of the point where the user clicked on an image map.
OWA_IMAGE.GET_Y( p IN point) RETURN INTEGER;
The Y coordinate as an integer.