jpicedt.graphic.view
Class LeafElementView

java.lang.Object
  jpicedt.graphic.view.AbstractView
      jpicedt.graphic.view.LeafElementView

All Implemented Interfaces:

View

Direct Known Subclasses:

AbstractCurveView, EllipseView, ParallelogramView, PicNodeConnectionView, TextView, TextViewHybrid

public class LeafElementView
extends AbstractView

A View for rendering leaf-elements; implements attributes caching, and shape rendering. Subclasses might just override the changedUpdate method, and update the shape variable accordingly.

Field Summary

protected AttributesViewFactory	attrFactory
protected Paint	interiorPaint paint for interior (cached)
protected ArrowView	leftArrow arrows to be painted if non-null
protected Paint	outlinePaint paint for outline (cached)
protected BasicStroke	outlineStroke stroke for outline and arrows (cached)
protected BasicStroke	overstrikeStroke stroke for overstrike (cached)
protected ArrowView	rightArrow arrows to be painted if non-null
protected Shape	shadow shadow to be painted if non-null ; updated using shape
protected Paint	shadowPaint paint for shadow (cached)
protected Shape	shape shape to be painted ; subclass must update it properly

Fields inherited from class jpicedt.graphic.view.AbstractView

bounds, element, highlighter

Constructor Summary

LeafElementView(Element e, AttributesViewFactory f)
construct a new View for the given Element

Method Summary

void	changedUpdate(DrawingEvent.EventType eventType) Give notification from the model that a change occured for an element this view is responsible for rendering.
HitInfo	hitTest(PEMouseEvent e) This implementation returns a HitInfo.Interior if the view is filled and a click occured on the interior, or a HitInfo.Stroke if a click occured on the stroke path (this use a FlatteningPathIterator built from the currentshape).
protected boolean	intersect(Rectangle2D r, ArrayList<Element> list) If this view intersects the given rectangle, adds the associated Element to the given list (if non-null) and returns true.
void	paint(Graphics2D g, Rectangle2D a) Render the View to the given graphic context.
protected void	syncArrowsAttributes() Synchronizes arrows' specific attributes with the model.
protected void	syncArrowsGeometry() Sync the geometry of the current "left/rightArrowShape" variables with the model if applicable, that is, if these vars are non-null (means: not Arrow.NONE).
protected void	syncAttributes() Synchronizes cached attributes values with the model ; outlineStroke, from the ViewFactory, using createStroke overstrikeStroke, from the ViewFactory, using createStrokeForOverstrike outlinePaint, from the ViewFactory, using createPaintForOutline interiorPaint, from the ViewFactory, using createPaintForInterior shadowPaint, from the ViewFactory, using createPaintForShadow then calls syncArrowAttributes()
protected void	syncBounds() Synchronizes the bounding box with the model ; "bounds" is first computed from the current shape's bound, if any, then its size gets increased by BARBELL_SIZE, line-thickness, overstrike width, and possibly shadow and arrows areas.
protected void	syncShadow() sync' the shadow with the current shape (which must therefore be valid) AND the current PicAttributeSet; hence must be called either when the geometry's changed, or when attributes have changed.
protected void	syncShape() Synchronize the "shape" variable with the model

Methods inherited from class jpicedt.graphic.view.AbstractView

getBounds, getContainer, getDrawing, getElement, getGraphics, getHighlighter, getParentView, getViewFactory, hitTest, intersect, paintHighlighter, repaint, setElement, setHighlighter

Methods inherited from class java.lang.Object

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

Field Detail

attrFactory

protected AttributesViewFactory attrFactory

shape

protected Shape shape

shape to be painted ; subclass must update it properly

shadow

protected Shape shadow

shadow to be painted if non-null ; updated using shape

outlineStroke

protected BasicStroke outlineStroke

stroke for outline and arrows (cached)

overstrikeStroke

protected BasicStroke overstrikeStroke

stroke for overstrike (cached)

interiorPaint

protected Paint interiorPaint

paint for interior (cached)

outlinePaint

protected Paint outlinePaint

paint for outline (cached)

shadowPaint

protected Paint shadowPaint

paint for shadow (cached)

leftArrow

protected ArrowView leftArrow

arrows to be painted if non-null

rightArrow

protected ArrowView rightArrow

arrows to be painted if non-null

Constructor Detail

LeafElementView

public LeafElementView(Element e,
                       AttributesViewFactory f)

construct a new View for the given Element

Method Detail

changedUpdate

public void changedUpdate(DrawingEvent.EventType eventType)

Give notification from the model that a change occured for an element this view is responsible for rendering.

To reduce the burden for subclasses, this implemention dispatches to the following methods, in that order, depending on the value of "eventType" :

• syncAttributes() if it's an ATTRIBUTE_CHANGE event or during initialization
• syncShape() in any case
• syncBounds() in any case.
• changedUpdate on the highlighter delegate, if any.

then call repaint with the union of the old and the new bounds as the argument.
Subclass might simply want to update shape before calling super.changedUpdate(), or override syncAttributes() and syncBounds() if they must implement more specific behaviour.

syncAttributes

protected void syncAttributes()

Synchronizes cached attributes values with the model ;

• outlineStroke, from the ViewFactory, using createStroke
• overstrikeStroke, from the ViewFactory, using createStrokeForOverstrike
• outlinePaint, from the ViewFactory, using createPaintForOutline
• interiorPaint, from the ViewFactory, using createPaintForInterior
• shadowPaint, from the ViewFactory, using createPaintForShadow
• then calls syncArrowAttributes()

syncArrowsAttributes

protected void syncArrowsAttributes()

Synchronizes arrows' specific attributes with the model. Called from syncAttributes(). This implementation creates arrows from ViewFactory.createArrow(). View that don't support arrows should override to do nothing. Those that support arrows only when the geometry enables this should override and call superclass when applicable.

syncBounds

protected void syncBounds()

Synchronizes the bounding box with the model ; "bounds" is first computed from the current shape's bound, if any, then its size gets increased by BARBELL_SIZE, line-thickness, overstrike width, and possibly shadow and arrows areas.

syncShape

protected void syncShape()

Synchronize the "shape" variable with the model

syncArrowsGeometry

protected void syncArrowsGeometry()

Sync the geometry of the current "left/rightArrowShape" variables with the model if applicable, that is, if these vars are non-null (means: not Arrow.NONE). This method gets called from changedUpdate() each time a GEOMETRY_CHANGE or ATTRIBUTE_CHANGE event occurs.

syncShadow

protected void syncShadow()

sync' the shadow with the current shape (which must therefore be valid) AND the current PicAttributeSet; hence must be called either when the geometry's changed, or when attributes have changed. Factories that do not support shadowing may override to do nothing.

paint

public void paint(Graphics2D g,
                  Rectangle2D a)

Render the View to the given graphic context. This implementation relies on a bottom-to-top z-ordering policy, ie first renders the shadow, then the interior and hatches, finally the outline (=stroke).

Parameters:

a - the current graphic clip

hitTest

public HitInfo hitTest(PEMouseEvent e)

This implementation returns a HitInfo.Interior if the view is filled and a click occured on the interior, or a HitInfo.Stroke if a click occured on the stroke path (this use a FlatteningPathIterator built from the currentshape).

Specified by:

hitTest in class AbstractView

Returns:

a HitInfo corresponding to the given mouse-event

intersect

protected boolean intersect(Rectangle2D r,
                            ArrayList<Element> list)

If this view intersects the given rectangle, adds the associated Element to the given list (if non-null) and returns true.

Specified by:

intersect in class AbstractView