Oracle Forms Developer – Form Builder Reference, Volume 1

• WIDTH
• DISPLAY_POSITION
• VIEWPORT_X_POS
• VIEWPORT_Y_POS
• VIEW_SIZE
• VIEWPORT_X_POS_ON_CANVAS
• VIEWPORT_Y_POS_ON_CANVAS
When you specify coordinates or width and height, you express these measurements in units of the
current form coordinate system, set on the Form Module property sheet. The form coordinate system
defines the units for specifying size and position coordinates of objects in the Form Builder. Use the
Coordinate System form module property to set the form’s coordinate units:
• character cells or
• real units:
inches
centimeters
pixels
points
When you design in the character cell coordinate system, all object dimensions and position coordinates
are expressed in character cells, so Form Builder accepts only whole numbers for size and position
properties.
When you design using real units (inches, centimeters, or points), all object dimensions and position
coordinates are expressed in the units you specify, so Form Builder will accept decimals as well as whole
numbers for size and position properties. The precision of real units is three digits, so you can specify
coordinates to thousandths. If you use pixels or character cells, coordinates are truncated to whole
numbers.
Built-in uppercase return values
The GET_X_PROPERTY built-ins, such as GET_FORM_PROPERTY, return CHAR arguments as
uppercase values. This will affect the way you compare results in IF statements.
Restricted built-in subprograms
Restricted built-ins affect navigation in your form, either external screen navigation, or internal
navigation. You can call these built-ins only from triggers while no internal navigation is occurring.
Restricted built-ins cannot be called from the Pre and Post triggers, which fire when Form Builder is
navigating from object to another.
Restricted built-ins can be called from the When triggers that are specific to interface items, such as
When-Button-Pressed or When-Checkbox-Changed. Restricted built-ins can also be called from any of
the When-New-"object"-Instance triggers and from key triggers.
Unrestricted built-ins do not affect logical or physical navigation and can be called from any trigger.
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