inherits from SpecialButton;
An overlaid image button is a special button that includes an image that depends on its target.
Instantiate: sometimes Subclass: sometimes Call its methods: often
You will rarely create custom subclasses of class OverlaidImageButton. You're most likely to use overlaid image button objects in your object definition files.
Class OverlaidImageButton defines the following methods:
| Method | Description |
|---|---|
| UpdateButton | Set the image of the button based on its target |
| Draw | Overridden to call inherited then draw the overlay image |
Class OverlaidImageButton 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 | Unsigned | Property settings |
| labelStyle | TextStyle | Text style of object's label |
| color | Unsigned | Color of object's content |
| altColor | Unsigned | Not used by button |
| shadow | Shadow | Shadow drawn with object |
| sound | Sound | Sound associated with object |
| Inherited from Stamp | ||
| image | Image | Image used to draw stamp |
| Inherited from HasBorder | ||
| border | Border | The button's border |
| Defined by OverlaidImageButton | ||
| overlayImage | Image | Optional image to superimpose after drawing rest of button |
overrides UpdateButton Call: rarely Override: rarely
The system calls UpdateButton at idle time to check the button's target or do other work to change the button. Class OverlaidImageButton overrides UpdateButton to update the button's image. If the target has an image, UpdateButton grabs that image. For some kinds of targets, such as ListViews, UpdateButton uses the target's content icon.