File	Doc	Category	Size	Date	Package
Viewport.java	API Doc	phoneME MR2 API (J2ME)	8304	Wed May 02 18:00:34 BST 2007	com.sun.perseus.model

Viewport

• java.lang.Object
  • CompositeNode

Fields Summary
public static final int	DEFAULT_VIEWPORT_WIDTH Default width for viewports.
public static final int	DEFAULT_VIEWPORT_HEIGHT Default height for viewports
public static final int	ZOOM_PAN_MAGNIFY As in the SVG 1.1 specification
public static final int	ZOOM_PAN_DISABLE As in the SVG 1.1 specification
public static final int	ZOOM_PAN_UNKNOWN As in the SVG 1.1 specification
protected int	width Viewport width
protected int	height Viewport height
protected com.sun.perseus.j2d.Transform	transform The Transform applied to this node.
protected com.sun.perseus.j2d.Transform	inverseTxf The inverse of the Transform applied to this node.
protected int	zoomAndPan The zoomAndPan setting

Constructors Summary
public Viewport() Default constructor

Methods Summary
protected com.sun.perseus.j2d.Transform	appendTransform(com.sun.perseus.j2d.Transform tx, com.sun.perseus.j2d.Transform workTx) Appends this node's transform, if it is not null. param tx the Transform to apply additional node transforms to. This may be null. param workTx a Transform which can be re-used if a new Transform needs to be created and workTx is not the same instance as tx. return a transform with this node's transform added. if (transform == null) { return tx; } tx = recycleTransform(tx, workTx); tx.mMultiply(transform); return tx;
public int	getHeight() return the viewport height return this.height;
public com.sun.perseus.j2d.Transform	getInverseTransformState() return this node's cached inverse transform. if (((canRenderState & CAN_RENDER_NON_INVERTIBLE_TXF_BIT) == 0)) { if (inverseTxf == null) { inverseTxf = new Transform(null); try { inverseTxf = (Transform) transform.inverse(inverseTxf); } catch (Exception e) { // If we get an exception, then we have a real error // condition, because we just checked that the // transform was invertible. throw new Error(); } } } else { inverseTxf = null; } return inverseTxf;
public com.sun.perseus.j2d.Transform	getTransform() return This Transformable's transform. return transform;
public com.sun.perseus.j2d.Transform	getTransformState() return this node's cached transform. return transform;
public int	getWidth() return the viewport width return this.width;
public int	getZoomAndPan() return The zoomAndPan setting for this viewport (read-only) return zoomAndPan;
public ModelNode	nodeHitAt(float[] pt) Returns the ModelNode, if any, hit by the point at coordinate x/y. param pt the x/y coordinate. Should never be null and be of size two. If not, the behavior is unspecified. The coordinates are in viewport space. return the ModelNode hit at the given point or null if none was hit. // Check for a hit on children return nodeHitAt(getLastChildNode(), pt);
protected void	recomputeTransformState(com.sun.perseus.j2d.Transform parentTransform) Recomputes the transform cache, if one exists. This should recursively call recomputeTransformState on children node or expanded content, if any. By default, because a ModelNode has no transform and no cached transform, this only does a pass down. param parentTransform the Transform applied to this node's parent. if (parentTransform != null) { throw new IllegalArgumentException(); } computeCanRenderTransformBit(transform); inverseTxf = null; recomputeTransformState(transform, getFirstChildNode());
public void	setSize(int newWidth, int newHeight) Sets the viewport size param newWidth the new viewport width. Should be greater than 0 param newHeight the new viewport height. Should be greater than 0. if (newWidth < 0 || newHeight < 0) { throw new IllegalArgumentException(); } if (newWidth == width && newHeight == height) { return; } modifyingNode(); this.width = newWidth; this.height = newHeight; recomputeTransformState(null); computeCanRenderWidthBit(width); computeCanRenderHeightBit(height); modifiedNode();
public void	setTransform(com.sun.perseus.j2d.Transform newTransform) param newTransform The new Transformable's transform. if (ElementNode.equal(newTransform, this.transform)) { return; } modifyingNode(); this.transform = newTransform; recomputeTransformState(null); modifiedNode();
public void	setZoomAndPan(int newZoomAndPan) param newZoomAndPan the new value for the zoom and pan setting if (newZoomAndPan != ZOOM_PAN_MAGNIFY && newZoomAndPan != ZOOM_PAN_DISABLE && newZoomAndPan != ZOOM_PAN_UNKNOWN) { throw new IllegalArgumentException(); } if (newZoomAndPan == zoomAndPan) { return; } modifyingNode(); this.zoomAndPan = newZoomAndPan; modifiedNode();