com.sun.javafx.sg.prism

Class NGCircle

java.lang.Object

com.sun.javafx.sg.prism.NGNode

com.sun.javafx.sg.prism.NGShape

com.sun.javafx.sg.prism.NGCircle

public class NGCircle
extends NGShape

Nested Class Summary

Nested classes/interfaces inherited from class com.sun.javafx.sg.prism.NGShape

NGShape.Mode

Nested classes/interfaces inherited from class com.sun.javafx.sg.prism.NGNode

NGNode.DirtyFlag, NGNode.RenderRootResult

Field Summary

Fields

Modifier and Type	Field and Description
private float	cx
private float	cy
private Ellipse2D	ellipse
(package private) static float	HALF_SQRT_HALF .5 * 1/Math.sqrt(2).

Fields inherited from class com.sun.javafx.sg.prism.NGShape

drawPaint, drawStroke, fillPaint, mode, shapeRep, THRESHOLD

Fields inherited from class com.sun.javafx.sg.prism.NGNode

childDirty, contentBounds, cullingBits, dirty, DIRTY_CHILDREN_ACCUMULATED_THRESHOLD, DIRTY_REGION_CONTAINS_NODE_BOUNDS, DIRTY_REGION_CONTAINS_OR_INTERSECTS_NODE_BOUNDS, DIRTY_REGION_INTERSECTS_NODE_BOUNDS, dirtyBounds, dirtyChildrenAccumulated, TEMP_TRANSFORM, transformedBounds

Constructor Summary

Constructors

Constructor and Description
NGCircle()

Method Summary

Modifier and Type	Method and Description
protected RectBounds	computeOpaqueRegion(RectBounds opaqueRegion) Computes and returns the opaque region for this node.
protected ShapeRep	createShapeRep(Graphics g)
Shape	getShape()
protected boolean	hasOpaqueRegion() Called only on NGNode subclasses which override NGNode.supportsOpaqueRegions() to return true, this method will return whether or not this NGNode is in a state where it has an opaque region to actually return.
protected boolean	supportsOpaqueRegions() Gets whether this NGNode supports opaque regions at all.
void	updateCircle(float cx, float cy, float r)

Methods inherited from class com.sun.javafx.sg.prism.NGShape

geometryChanged, getFillPaint, getMode, getStrokeShape, hasOverlappingContents, isSmooth, renderContent, renderContent2D, setDrawPaint, setDrawStroke, setDrawStroke, setFillPaint, setMode, setSmooth, visualsChanged

Methods inherited from class com.sun.javafx.sg.prism.NGNode

accumulateDirtyRegions, accumulateGroupDirtyRegion, accumulateNodeDirtyRegion, applyClip, applyEffect, applyTransform, checkBoundsInQuad, clearDirty, clearDirtyTree, clearPainted, computeNodeRenderRoot, computePadding, computeRenderRoot, doPreCulling, doRender, drawDirtyOpts, effectChanged, getCacheFilter, getClipNode, getClippedBounds, getCompleteBounds, getContentBounds, getEffect, getEffectBounds, getEffectFilter, getFilterContext, getName, getNodeBlendMode, getOpacity, getOpaqueRegion, getParent, getRenderRoot, getTransform, hasVisuals, invalidateCache, invalidateCacheByTranslation, invalidateOpaqueRegion, isClean, isContentBounds2D, isDepthTest, isOpaqueRegionInvalid, isReadbackSupported, isRectClip, isShape3D, isVisible, markCullRegions, markDirty, markTreeDirty, markTreeDirtyNoIncrement, needsBlending, printDirtyOpts, release, render, renderClip, renderEffect, renderForcedContent, renderForClip, setCachedAsBitmap, setClipNode, setContentBounds, setDepthTest, setEffect, setName, setNodeBlendMode, setOpacity, setParent, setTransformedBounds, setTransformMatrix, setVisible, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

HALF_SQRT_HALF

static final float HALF_SQRT_HALF

.5 * 1/Math.sqrt(2). If you multiply this value by the diameter of the circle, then you will get half the length of the side of the square which is inscribed within the circle. This is used when computing the opaque region of the circle and ellipse. This value has been precomputed and stored as a constant to make the resulting math faster. It is low in precision to compute a conservative inscribed square.

See Also:

Constant Field Values

ellipse

private Ellipse2D ellipse

cx

private float cx

cy

private float cy

Constructor Detail

NGCircle

public NGCircle()

Method Detail

updateCircle

public void updateCircle(float cx,
                         float cy,
                         float r)

getShape

public Shape getShape()

Specified by:

getShape in class NGShape

supportsOpaqueRegions

protected boolean supportsOpaqueRegions()

Description copied from class: NGNode

Gets whether this NGNode supports opaque regions at all. Most node types do not, but some do. If an NGNode subclass is written to support opaque regions, it must override this method to return true. The subclass must then also override the computeDirtyRegion method to return the dirty region, or null if the node in its current state doesn't have one. This method is intended to be immutable.

Overrides:

supportsOpaqueRegions in class NGNode

Returns:

Whether this NGNode implementation supports opaque regions. This could also have been implemented via an interface that some NGNodes implemented, but then we'd have instanceof checks which I'd rather avoid.

hasOpaqueRegion

protected boolean hasOpaqueRegion()

Description copied from class: NGNode

Called only on NGNode subclasses which override NGNode.supportsOpaqueRegions() to return true, this method will return whether or not this NGNode is in a state where it has an opaque region to actually return. If this method returns true, a subsequent call to NGNode.computeOpaqueRegion(com.sun.javafx.geom.RectBounds) must return a non-null result. Any state used in the computation of this method, when it changes, must result in a call to NGNode.invalidateOpaqueRegion().

Overrides:

hasOpaqueRegion in class NGShape

Returns:

Whether this NGNode currently has an opaque region.

computeOpaqueRegion

protected RectBounds computeOpaqueRegion(RectBounds opaqueRegion)

Description copied from class: NGNode

Computes and returns the opaque region for this node. This method

Overrides:

computeOpaqueRegion in class NGNode

Returns:

createShapeRep

protected ShapeRep createShapeRep(Graphics g)

Overrides:

createShapeRep in class NGShape