extended by MeasureSprite
openfl.display.Sprite with a validation system where multiple property
changes may be queued up to be processed all at once. A performance
optimization for frequently changing user interfaces.
read onlydepth:Int = -1
The object's depth in the display list, relative to the stage. If
the object isn't on the stage, its depth will be
Used by the validation system to validate objects from the top down.
Indicates whether the control is pending validation or not. By default,
true if any invalidation flag has been set. If you pass in a
specific flag, returns
true only if that flag has been set (others may
be set too, but it checks the specific flag only. If all flags have been
marked as invalid, always returns
Call this function to tell the UI control that a redraw is pending. The redraw will happen immediately before OpenFL renders the UI control to the screen. The validation system exists to ensure that multiple properties can be set together without redrawing multiple times in between each property change.
If you cannot wait until later for the validation to happen, you
validate() to redraw immediately. As an example,
you might want to validate immediately if you need to access the
height values of the UI
control, since these values are calculated during validation.
Sets an invalidation flag. This will not add the component to the
validation queue. It only sets the flag. A subclass might use
this function during
draw() to manipulate the flags that
its superclass sees.
Override to customize layout and to adjust properties of children. Called when the component validates, if any flags have been marked to indicate that validation is pending.
Immediately validates the display object, if it is invalid. The validation system exists to postpone updating a display object after properties are changed until until the last possible moment the display object is rendered. This allows multiple properties to be changed at a time without requiring a full update every time.