ScaleScrollStrategy

Phrase "Scale scroll strategy" in CarnacJS means either a method formatted as follows:

import {Transformation} from '@int/geotoolkit/util/Transformation'

const myScaleScrollStrategy = function (model, inputTransformation) {
    var outputTransformation = new Transformation (...);
    return outputTransformation;
}

or a class implementing ScaleScrollStrategy interface. The interface states the only method called adjustTransformation having the same format as the function above.

Both types of strategies are internally utilized by {geotoolkit/scene/AnnotatedNode} object to drive its data model scaling/scrolling behavior when the node's setTransformation method is called.

Currently CarnacJS has (in its geotoolkit.scene namespace) eight classes:

• OneDimensionScaleScrollStrategy(options)
• KeepScaleAspectRatioStrategy(options)
• RestrictVisibleModelLimitsStrategy(options)
• RestrictScaleStrategy(options)
• AnchoredTransformationAdjustmentStrategy(options)
• KeepAspectFitBothDimensionsStrategy(options)
• KeepAspectRatioRestrictedAnchoredStrategy(options)
• KeepAspectRestrictVisibleStrategy(options)

Object approach implies tuning for non-trivial strategies (the strategies requiring additional parameters to adjust transformation); plus, unlike methods, objects can be serialized/deserialized.