inherits from Box; inherits from Scroller;
Class ScrollBox defines objects that can be used as containers for scrollable objects. You can use scroll boxes for objects with contents that don't fit completely on the screen. For more information about scroll boxes, see Magic Cap Concepts.
Instantiate: rarely Subclass: rarely Call its methods: never
You might create an object of class ScrollBox if you want to have a container that can scroll its contents, such as the E-Mail drawer in the Stamps window.
Class ScrollBox defines the following methods:
| Method | Description |
|---|---|
ArrowState |
Overridden to use current offset and lowest viewable. |
| ChangedContents | Overridden to recompute position of lowest viewable. |
| MaximumScrollOffset | Overridden to use position of lowest viewable. |
| MovedContents | Overridden to ensure subview is in a grid position. |
| PageDown | Overridden to move down by height of content. |
| PageUp | Overridden to move up by height of content. |
| ScrollTrack | Overridden to preserve scroll arrows. |
| Validate |
Class ScrollBox defines the following fields:
| Field | Type | Description |
|---|---|---|
| Inherited from SingleLinkable | ||
| next | Object | Next item in view list |
| Inherited from Linkable | ||
| previous | Object | Previous item in view list |
| Inherited from Viewable | ||
| superview | Viewable | Container for this object |
| subview | Viewable | Object contained by this object |
| relativeOrigin | Dot | Origin relative to superview |
| contentSize | Dot | Size of content rectangle |
| viewFlags | Flags | Property settings |
| labelStyle | TextStyle | Text style of object's label |
| color | Color | Color of object's content |
| shadow | Shadow | Shadow drawn with object |
| sound | Sound | Sound associated with object |
| Inherited from HasBorder | ||
| border | Border | Framed border drawn around object |
| defined by ScrollBox | ||
| maximumSubviewBottom | Micron | Used by Magic Cap |
| gridSize | Dot | Horizontal and vertical grid spacing |
| gridOffset | Dot | Offset of first grid position |
| topArrow | Viewable | Scroll-up arrow |
| bottomArrow | Viewable | Scroll-down arrow |
overrides ArrowState Call: rarely Override: sometimes
Class ScrollBox overrides ArrowState to return the current scroll offset using the current offset and the position of the lowest subview.
overrides ChangedContents Call: rarely Override: sometimes
Class ScrollBox overrides ChangedContents to recompute the position of the lowest subview.
overrides MovedContents Call: rarely Override: sometimes
Class ScrollBox overrides MovedContents to put the subview back in a grid position after it has been moved.
overrides MaximumScrollOffset Call: rarely Override: sometimes
Class ScrollBox overrides MaximumScrollOffset to use the position of the lowest subview when computing its result.
overrides PageDown Call: rarely Override: sometimes
Class ScrollBox overrides PageDown to scroll the subviews down by the height of the content with no overlap.
overrides PageUp Call: rarely Override: sometimes
Class ScrollBox overrides PageUp to scroll the subviews up by the height of the content with no overlap.
overrides ScrollTrack Call: rarely Override: sometimes
Class ScrollBox overrides ScrollTrack to preserve the scroll arrows while calling its inherited implementation.