Environment:      Siren
Superclass:         DependentComposite
Category:         MusicUI-DisplayLists
Instance variables:   offset

Instances of DisplayList are used for representing composed structured graphics. They can be nested (see the class examples) and can display themselves and their components.

Instance Variables:
   offset       the object's offset distance relative to its container

accessing

color
   

flatten
   Answer a copy of the receiver with its hierarchy flattened.

itemsFromX: x1 toX: x2
   Answer the list of items whose offsets are within the given X range.

itemsIntersecting: rect
   Answer the list of items whose boundingBoxes intersect the given rectangle.
   Clip them to the box's border if necessary.

itemsWithin: rect
   Answer the list of items whose boundingBoxes are entirely within the given rectangle.

itemsWithin: dist of: point
   Answer the list of items whose boundingBoxes are entirely within the given rectangle.

itemWithin: dist of: point
   Answer the list of items whose boundingBoxes are entirely within the given rectangle.

modelsFromX: x1 toX: x2
   Answer the list of model-space-items whose offsets are within the given X range.

nodeAt: aPath
   Answer the element described by the collection of items in the argument.

nodeFor: aModel
   Answer the element whose model is the argument.

offset
   Answer the receiver's offset.

offset: aPoint
   Set the receiver's offset.

wrapperClass
   Raise an error.

transforming

scaledBy: aPoint
   Scale the receiver's offset by the argument.

translateBy: aPoint
   Translate the receiver's offset by the argument.

printing

printCompleteOn: aStream depth: depth
   Descend the hierarchy printing on the stream.

printCompletePostScriptOn: aStream depth: depth
   Descend the hierarchy printing on the stream.

printOn: aStream
   Print the receiver on the argument using the recursive method.

printPostScriptOn: aStream
   Print the receiver on the argument using the recursive method.

testing

hasItems
   Answer whether or not the receiver has items or components.

isEmpty
   Amswer whether the receiver has any items.

bounds accessing

computePreferredBounds
   Compute the receiver's preferredBounds

extent
   Answer the extent of the receiver.

enumerating

do: aBlock
   Iterate the argument block over the receiver's components.

displaying

display
   Open a DisplayListView on the receiver.

displayNonCached
   Open a DisplayListView on the receiver.

displayOn: aGraphicsContext
   Display each of the receiver's components.

displayPostScriptOn: aPostscriptContext
   Display each of the receiver's components.

adding-removing

add: aVisualComponent
   Add the argument to the receiver.

add: aVisualComponent at: aPoint
   Add aVisualComponent to the receiver's components with its offset set to aPoint.

add: anItem atPath: aPath
   Add the first argument at the node described by the second.

addAll: aCollection
   Add the argument to the receiver.

addComponent: aVisualComponent
   Add the argument to the receiver.

addWrapper: aVisualWrapper
   Raise an error.

MetaClass:         DisplayList class

examples

exampleHierarchical
   Create and answer a large display list with a lines, strings, and visuals.

gridExample
   Create and answer a large display list with lines and strings.

gridExampleX: x byY: y
   Create and answer a large display list with lines and strings.

polylineExample
   Answer a display list with randomly-placed random-color polylines over the given extent.

polylineExampleHuge
   Answer a display list with randomly-placed random-color polylines over the given (very large) extent.

polylinesX: x byY: y
   Answer a display list with randomly-placed random-color polylines over the given extent.

polylinesX: x byY: y items: num
   Answer a display list with randomly-placed random-color polylines over the given extent.

postScriptExample
   Create and answer a large display list with a lines, strings, and visuals.

randomExample
   Create and answer a large display list with a lines, strings, and visuals.

rectangleExample
   Answer a display list with randomly-placed random-color rectangles over the given extent.

rectanglesX: x byY: y
   Answer a display list with randomly-placed random-color rectangles over the given extent.

stringExample
   Open a display list view with randomly-placed random-color strings over the given extent.

stringsX: x byY: y
   Answer a display list with randomly-placed random-color strings over the given extent.

visualsX: x byY: y
   Answer a display list with randomly-placed random-color visuals over the given extent.