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java.lang.Objectcom.nwoods.jgo.JGoObject
com.nwoods.jgo.JGoDrawable
com.nwoods.jgo.JGoStroke
com.nwoods.jgo.JGoPolygon
Represents a basic polygon object. The polygon is a JGoStroke object which means that it is defined by a series of points. A polygon makes a closed figure by connecting the last point to the first. A polygon looks similar to what's shown below:
The arrow properties of JGoStroke do not apply to polygons. However, the Cubic and Highlight properties can be used, in addition to the Pen and Brush properties, along with all of the methods that manipulate the points of the polygon.
Field Summary |
Fields inherited from class com.nwoods.jgo.JGoStroke |
ChangedAddPoint, ChangedAllPoints, ChangedArrowHeads, ChangedArrowLength, ChangedArrowShaftLength, ChangedArrowWidth, ChangedCubic, ChangedHighlight, ChangedModifiedPoint, ChangedRemovePoint, myPoints |
Fields inherited from class com.nwoods.jgo.JGoObject |
Bottom, BottomCenter, BottomLeft, BottomMiddle, BottomRight, Center, CenterLeft, CenterRight, Changed4ResizeHandles, ChangedAutoRescale, ChangedBrush, ChangedDraggable, ChangedDragsNode, ChangedGeometry, ChangedGrabChildSelection, ChangedInitializing, ChangedPen, ChangedResizable, ChangedSelectable, ChangedUpdatePartner, ChangedVisible, ChangedZOrder, LastChangedHint, Left, LeftCenter, NoHandle, NoSpot, NumReservedHandles, RepaintAll, Right, RightCenter, SideLeft, SideRight, Top, TopCenter, TopLeft, TopMiddle, TopRight |
Constructor Summary | |
JGoPolygon()
Create a new polygon with no points. |
Method Summary | |
JGoObject |
copyObject(JGoCopyEnvironment env)
Create a copy of the JGoPolygon. |
boolean |
isPointInObj(org.eclipse.swt.graphics.Point pnt)
Instead of just checking the bounding rectangle, this sees if the given point is actually in the polygon. |
void |
paint(Graphics2D g,
JGoView view)
Draws the polygon in the view. |
DomNode |
SVGReadObject(DomDoc svgDoc,
JGoDocument jGoDoc,
DomElement svgElement,
DomElement jGoChildElement)
Read this object in from a DomDoc representing a Scalable Vector Graphics (SVG) XML document. |
void |
SVGWriteObject(DomDoc svgDoc,
DomElement jGoElementGroup)
Write this object out to a DomDoc representing a Scalable Vector Graphics (SVG) XML document. |
Methods inherited from class com.nwoods.jgo.JGoDrawable |
draw3DRect, draw3DRect, drawEllipse, drawEllipse, drawEllipse, drawLine, drawLine, drawPath, drawPolygon, drawPolygon, drawRect, drawRect, drawRect, drawRoundRect, drawRoundRect, getBrush, getPen, setBrush, setPen, SVGAddPathArgs, SVGReadAttributes, SVGWriteAttributes |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public JGoPolygon()
Method Detail |
public JGoObject copyObject(JGoCopyEnvironment env)
copyObject
in class JGoStroke
env
- the environment for the copy operation - keeps track of copied objects.public void SVGWriteObject(DomDoc svgDoc, DomElement jGoElementGroup)
JGoXMLSaveRestore
This method will be called by com.nwoods.jgo.svg.DefaultDocument.SVGWriteDoc() for every JGoObject contained within a JGoDocument. The following example uses a JGoRectangle to illustrate the format of a generated SVG JGoObject:
<g>
<JGoClass class="com.nwoods.jgo.JGoRectangle"\>
<rect height="75" style="stroke:black;stroke-width:1;fill:rgb(255,0,0);" width="75" x="65" y="71"/>
<JGoClass class="com.nwoods.jgo.JGoDrawable" drawablebrush="jgoid1" drawablepen="jgoid2" embeddedpenbrush="false"/>
<JGoClass class="com.nwoods.jgo.JGoObject" obj_flags="1054"/>
</g>
Note that the entire JGoObject is enclosed in a group (<g>). Each subclass of the JGoObject is described by a <JGoClass> element, starting with the most specific class and moving to the more general. Each <JGoClass> element has a "class" attribute which defines the class name. Each <JGoClass> element may also have several other attributes which uniquely describe that state of that class. Following the <JGoClass> element, each class may also genereate any other elements that are required, including representations of contained objects and standard SVG elements such as the <rect> element shown in the above example. The generation of SVG elements in the output makes it possible for the output to be read by SVG viewers and other SVG aware applications. The information contained in the <JGoClass> elements allows us to accurately save and restore all the information in a particular JGoObject subclass.
If this class contains a reference to another object, call DomDoc.registerReferencingNode() to register that reference. This will cause the element representing the referenced object to be identified with a unique id attribute, and cause the element representing the referring object to have a user defined attribute containing a reference to that id. See DomDoc.registerReferencingNode() for more information.
Typically, an implementation of this method will generate a <JGoClass> element using the DomDoc.createJGoClassElement() method, adding whatever attributes are necessary to describe the class. It will then call its superclass so that the superclass can add its own <JGoClass> element and other information to jGoElementGroup within the DomDoc.
Refer to com.nwoods.jgo.examples.flower.ActivityNode.SVGWriteObject() and com.nwoods.jgo.examples.SimpleNode.SVGWriteObject() for examples using this method.
Refer to the file com.nwoods.jgo.svg\xsvg.dtd for a formal description of JGo extensions to the SVG document type.
SVGWriteObject
in interface JGoXMLSaveRestore
SVGWriteObject
in class JGoStroke
public DomNode SVGReadObject(DomDoc svgDoc, JGoDocument jGoDoc, DomElement svgElement, DomElement jGoChildElement)
JGoXMLSaveRestore
This method will be called by com.nwoods.jgo.svg.DefaultDocument.SVGReadDoc() for every <JGoClass> element encountered in a DomDoc. First, an object of the type specified by the class attribute will be created and then the SVGReadObject() method will be called on that newly created object. Refer to SVGWriteObject() for a description of the expected format of the SVG document.
This method may also be called by com.nwoods.jgo.svg.DefaultDocument.SVGReadDoc() when reading any SVG document, including those not generated by JGo and therefore not containing any <JGoClass> elements. In such cases, the DefaultDocument.SVGReadElement() method may be subclassed to examine the SVG element and cause the appropriate JGoObject to be created to represent that element and call SVGReadObject() on that newly created object. By default, standard JGoObjects such as JGoRectangles, JGoStrokes, etc will be created to represent these objects.
If this class contains a reference to another object, call DomDoc.registerReferencingObject() to register that reference. This will cause the JGoObject.SVGUpdateReference() to be called on the referencing object after all the objects have been created, passing in the object befing referenced. See DomDoc.registerReferencingObject() for more information.
Typically, an implementation of this method starts by verifying that the element being read is a <JGoClass> element (which will be true if jGoChildElement is not null). This will always be true unless you have subclassed the DefaultDocument.SVGReadElement() method as described above. It will then read the expected attributes of the <JGoClass> element (as written by SVGReadObject()), call SVGReadObject() on its superclass, and finally return the next element by calling svgElement.getNextSibling().
Refer to com.nwoods.jgo.examples.flower.ActivityNode.SVGReadObject() and com.nwoods.jgo.examples.SimpleNode.SVGReadObject() for examples using this method.
SVGReadObject
in interface JGoXMLSaveRestore
SVGReadObject
in class JGoStroke
public void paint(Graphics2D g, JGoView view)
paint
in class JGoStroke
g
- The graphics context on which to draw.view
- the view we're drawing inpublic boolean isPointInObj(org.eclipse.swt.graphics.Point pnt)
isPointInObj
in class JGoStroke
pnt
- the point to check
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