com.mxgraph.canvas

Class mxSvgCanvas

java.lang.Object

com.mxgraph.canvas.mxBasicCanvas

com.mxgraph.canvas.mxSvgCanvas

All Implemented Interfaces:

mxICanvas

public class mxSvgCanvas
extends mxBasicCanvas

An implementation of a canvas that uses SVG for painting. This canvas ignores the STYLE_LABEL_BACKGROUNDCOLOR and STYLE_LABEL_BORDERCOLOR styles due to limitations of SVG.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.w3c.dom.Element	defs
protected org.w3c.dom.Document	document Holds the HTML document that represents the canvas.
protected boolean	embedded Specifies if images should be embedded as base64 encoded strings.

Fields inherited from class com.mxgraph.canvas.mxBasicCanvas

DEFAULT_IMAGEBASEPATH, drawLabels, imageBasePath, imageCache, PRESERVE_IMAGE_ASPECT, scale, translate

Constructor Summary

Constructors

Constructor and Description
mxSvgCanvas() Constructs a new SVG canvas for the specified dimension and scale.
mxSvgCanvas(org.w3c.dom.Document document) Constructs a new SVG canvas for the specified bounds, scale and background color.

Method Summary

Modifier and Type	Method and Description
void	appendSvgElement(org.w3c.dom.Element node)
protected java.lang.String	createDataUrl(java.lang.String src)
protected org.w3c.dom.Element	createGradientElement(java.lang.String start, java.lang.String end, java.lang.String direction)
protected org.w3c.dom.Element	createImageElement(double x, double y, double w, double h, java.lang.String src, boolean aspect, boolean flipH, boolean flipV, boolean embedded)
java.lang.Object	drawCell(mxCellState state) Draws the given cell.
java.lang.Object	drawLabel(java.lang.String label, mxCellState state, boolean html) Draws the given label.
org.w3c.dom.Element	drawLine(java.util.List<mxPoint> pts, java.util.Map<java.lang.String,java.lang.Object> style) Draws the given lines as segments between all points of the given list of mxPoints.
mxPoint	drawMarker(org.w3c.dom.Element parent, java.lang.Object type, mxPoint p0, mxPoint pe, float size, float strokeWidth, java.lang.String color) Draws the specified marker as a child path in the given parent.
org.w3c.dom.Element	drawShape(int x, int y, int w, int h, java.util.Map<java.lang.String,java.lang.Object> style) Draws the shape specified with the STYLE_SHAPE key in the given style.
java.lang.Object	drawText(java.lang.String text, int x, int y, int w, int h, java.util.Map<java.lang.String,java.lang.Object> style) Draws the specified text either using drawHtmlString or using drawString.
protected org.w3c.dom.Element	getDefsElement()
org.w3c.dom.Document	getDocument() Returns a reference to the document that represents the canvas.
protected org.w3c.dom.Element	getEmbeddedImageElement(java.lang.String src)
org.w3c.dom.Element	getGlassGradientElement()
org.w3c.dom.Element	getGradientElement(java.lang.String start, java.lang.String end, java.lang.String direction)
java.lang.String	getGradientId(java.lang.String start, java.lang.String end, java.lang.String direction)
protected java.io.InputStream	getResource(java.lang.String src)
boolean	isEmbedded()
protected boolean	isImageResource(java.lang.String src) Returns true if the given string ends with .png, .jpg or .gif.
void	setDocument(org.w3c.dom.Document document)
void	setEmbedded(boolean value)

Methods inherited from class com.mxgraph.canvas.mxBasicCanvas

flushImageCache, getImageBasePath, getImageForStyle, getScale, getTranslate, isDrawLabels, loadImage, setDrawLabels, setImageBasePath, setScale, setTranslate

Methods inherited from class java.lang.Object

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

Field Detail

document

protected org.w3c.dom.Document document

Holds the HTML document that represents the canvas.

defs

protected org.w3c.dom.Element defs

embedded

protected boolean embedded

Specifies if images should be embedded as base64 encoded strings. Default is false.

Constructor Detail

mxSvgCanvas

public mxSvgCanvas()

Constructs a new SVG canvas for the specified dimension and scale.

mxSvgCanvas

public mxSvgCanvas(org.w3c.dom.Document document)

Constructs a new SVG canvas for the specified bounds, scale and background color.

Method Detail

appendSvgElement

public void appendSvgElement(org.w3c.dom.Element node)

getDefsElement

protected org.w3c.dom.Element getDefsElement()

getGradientElement

public org.w3c.dom.Element getGradientElement(java.lang.String start,
                                              java.lang.String end,
                                              java.lang.String direction)

getGlassGradientElement

public org.w3c.dom.Element getGlassGradientElement()

createGradientElement

protected org.w3c.dom.Element createGradientElement(java.lang.String start,
                                                    java.lang.String end,
                                                    java.lang.String direction)

getGradientId

public java.lang.String getGradientId(java.lang.String start,
                                      java.lang.String end,
                                      java.lang.String direction)

isImageResource

protected boolean isImageResource(java.lang.String src)

Returns true if the given string ends with .png, .jpg or .gif.

getResource

protected java.io.InputStream getResource(java.lang.String src)

createDataUrl

protected java.lang.String createDataUrl(java.lang.String src)
                                  throws java.io.IOException

Throws:

java.io.IOException

getEmbeddedImageElement

protected org.w3c.dom.Element getEmbeddedImageElement(java.lang.String src)

createImageElement

protected org.w3c.dom.Element createImageElement(double x,
                                                 double y,
                                                 double w,
                                                 double h,
                                                 java.lang.String src,
                                                 boolean aspect,
                                                 boolean flipH,
                                                 boolean flipV,
                                                 boolean embedded)

setDocument

public void setDocument(org.w3c.dom.Document document)

getDocument

public org.w3c.dom.Document getDocument()

Returns a reference to the document that represents the canvas.

Returns:

Returns the document.

setEmbedded

public void setEmbedded(boolean value)

isEmbedded

public boolean isEmbedded()

drawCell

public java.lang.Object drawCell(mxCellState state)

Description copied from interface: mxICanvas

Draws the given cell.

Parameters:

state - State of the cell to be painted.

Returns:

Object that represents the cell.

drawLabel

public java.lang.Object drawLabel(java.lang.String label,
                                  mxCellState state,
                                  boolean html)

Description copied from interface: mxICanvas

Draws the given label.

Parameters:

label - String that represents the label.

state - State of the cell whose label is to be painted.

html - Specifies if the label contains HTML markup.

Returns:

Object that represents the label.

drawShape

public org.w3c.dom.Element drawShape(int x,
                                     int y,
                                     int w,
                                     int h,
                                     java.util.Map<java.lang.String,java.lang.Object> style)

Draws the shape specified with the STYLE_SHAPE key in the given style.

Parameters:

x - X-coordinate of the shape.

y - Y-coordinate of the shape.

w - Width of the shape.

h - Height of the shape.

style - Style of the the shape.

drawLine

public org.w3c.dom.Element drawLine(java.util.List<mxPoint> pts,
                                    java.util.Map<java.lang.String,java.lang.Object> style)

Draws the given lines as segments between all points of the given list of mxPoints.

Parameters:

pts - List of points that define the line.

style - Style to be used for painting the line.

drawMarker

public mxPoint drawMarker(org.w3c.dom.Element parent,
                          java.lang.Object type,
                          mxPoint p0,
                          mxPoint pe,
                          float size,
                          float strokeWidth,
                          java.lang.String color)

Draws the specified marker as a child path in the given parent.

drawText

public java.lang.Object drawText(java.lang.String text,
                                 int x,
                                 int y,
                                 int w,
                                 int h,
                                 java.util.Map<java.lang.String,java.lang.Object> style)

Draws the specified text either using drawHtmlString or using drawString.

Parameters:

text - Text to be painted.

x - X-coordinate of the text.

y - Y-coordinate of the text.

w - Width of the text.

h - Height of the text.

style - Style to be used for painting the text.