Used for exporting images. To render to an image from a given XML string, graph size and and background color, the following code is used:

        Image image = mxUtils.CreateImage(width, height, background);
        Graphics g = Graphics.FromImage(image);
        g.SmoothingMode = SmoothingMode.HighQuality;
        mxSaxOutputHandler handler = new mxSaxOutputHandler(new mxGdiCanvas2D(g));
        handler.Read(new XmlTextReader(new StringReader(xml)));

Text rendering is available for plain text only, with optional word wrapping. More...

Inheritance diagram for com.mxgraph.mxGdiCanvas2D:

List of all members.

Classes
class	CanvasState
Public Member Functions
	mxGdiCanvas2D (Graphics g)
void	Save ()
void	Restore ()
void	Scale (double value)
	Sets the given scale.
void	Translate (double dx, double dy)
	Translates the canvas.
void	Rotate (double theta, bool flipH, bool flipV, double cx, double cy)
	Rotates the canvas.
void	SetShadowOffset (double dx, double dy)
	Prepares the canvas to draw a gradient.
void	SetGradient (String color1, String color2, double x, double y, double w, double h, String direction, double alpha1, double alpha2)
	Sets the given gradient.
void	Rect (double x, double y, double w, double h)
	Draws a rectangle.
void	Roundrect (double x, double y, double w, double h, double dx, double dy)
void	Ellipse (double x, double y, double w, double h)
	Draws an ellipse.
void	Image (double x, double y, double w, double h, String src, bool aspect, bool flipH, bool flipV)
	Draws an image.
void	Text (double x, double y, double w, double h, string str, string align, string valign, bool wrap, string format, string overflow, bool clip, double rotation)
void	Begin ()
void	MoveTo (double x, double y)
void	LineTo (double x, double y)
void	QuadTo (double x1, double y1, double x2, double y2)
void	CurveTo (double x1, double y1, double x2, double y2, double x3, double y3)
void	Close ()
void	Stroke ()
void	Fill ()
void	FillAndStroke ()
Static Public Member Functions
static StringFormat	CreateStringFormat (string align, string valign, bool wrap, bool clip)
	Creates the specified string format.
Protected Member Functions
Color	ParseColor (string hex)
	Helper method that uses mxUtils#parseColor(String). Subclassers.
void	DrawImage (Image image, Rectangle bounds)
	Implements the call to the graphics API.
Image	LoadImage (String src)
	Loads the specified image.
Rectangle	GetImageBounds (Image img, double x, double y, double w, double h, bool aspect)
	Returns the bounds for the given image.
Size	GetImageSize (Image image)
	Returns the size for the given image.
void	ConfigureImageGraphics (double x, double y, double w, double h, bool flipH, bool flipV)
PointF	GetMargin (String align, String valign)
void	PaintCurrentPath (bool filled, bool stroked)
void	PaintShadow (bool filled, bool stroked)
void	UpdateFont ()
Font	CreateFont (String family, FontStyle style, float size)
String	GetFontName (String family)
	Returns a font name for the given font family.
void	UpdatePen ()
Protected Attributes
bool	matchHtmlAlignment = true
	matchHtmlAlignment
bool	htmlAsPlainText = true
	htmlAsPlainText
bool	wrapPlainText = true
	htmlAsPlainText
Graphics	graphics
CanvasState	state = new CanvasState()
Stack< CanvasState >	stack = new Stack<CanvasState>()
GraphicsPath	currentPath
mxPoint	lastPoint
	Holds the last point of a moveTo or lineTo operation to determine if the.
Font	lastFont = null
	FontCaching.
FontStyle	lastFontStyle = 0
	FontCaching.
float	lastFontSize = 0
	FontCaching.
String	lastFontFamily = ""
	FontCaching.
Properties
double	StrokeWidth `[set]`
	Sets the strokewidth.
string	StrokeColor `[set]`
bool	Dashed `[set]`
	Specifies if lines are dashed.
string	DashPattern `[set]`
	Sets the dashpattern.
string	LineCap `[set]`
	Sets the linecap.
string	LineJoin `[set]`
	Sets the linejoin.
double	MiterLimit `[set]`
	Sets the miterlimit.
double	FontSize `[set]`
	Sets the fontsize.
string	FontColor `[set]`
	Sets the fontcolor.
string	FontBackgroundColor `[set]`
	Default value 0. See mxConstants#STYLE_FONTSTYLE.
string	FontBorderColor `[set]`
	Default value 0. See mxConstants#STYLE_FONTSTYLE.
string	FontFamily `[set]`
	Sets the font family.
int	FontStyle `[set]`
	Sets the given fontstyle.
double	Alpha `[set]`
	Sets the given alpha.
string	FillColor `[set]`
	Sets the given fillcolor.
bool	Shadow `[set]`
	Default value mxConstants#NONE.
string	ShadowColor `[set]`
	Default value mxConstants#NONE.
double	ShadowAlpha `[set]`
	Default value 1. This method may add rendering overhead and should be used with care.

Detailed Description

Used for exporting images. To render to an image from a given XML string, graph size and and background color, the following code is used:

        Image image = mxUtils.CreateImage(width, height, background);
        Graphics g = Graphics.FromImage(image);
        g.SmoothingMode = SmoothingMode.HighQuality;
        mxSaxOutputHandler handler = new mxSaxOutputHandler(new mxGdiCanvas2D(g));
        handler.Read(new XmlTextReader(new StringReader(xml)));

Text rendering is available for plain text only, with optional word wrapping.

Constructor & Destructor Documentation

com.mxgraph.mxGdiCanvas2D.mxGdiCanvas2D ( Graphics g ) [inline]

Constructs a new graphics export canvas.

Member Function Documentation

void com.mxgraph.mxGdiCanvas2D.Begin ( ) [inline]

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Close ( ) [inline]

Closes the current path.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.ConfigureImageGraphics	(	double	x,
		double	y,
		double	w,
		double	h,
		bool	flipH,
		bool	flipV
	)		`[inline, protected]`

Creates a graphic instance for rendering an image.

Font com.mxgraph.mxGdiCanvas2D.CreateFont	(	String	family,
		FontStyle	style,
		float	size
	)		`[inline, protected]`

Hook for subclassers to implement font caching.

static StringFormat com.mxgraph.mxGdiCanvas2D.CreateStringFormat	(	string	align,
		string	valign,
		bool	wrap,
		bool	clip
	)		`[inline, static]`

Creates the specified string format.

void com.mxgraph.mxGdiCanvas2D.CurveTo	(	double	x1,
		double	y1,
		double	x2,
		double	y2,
		double	x3,
		double	y3
	)		`[inline]`

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.DrawImage	(	Image	image,
		Rectangle	bounds
	)		`[inline, protected]`

Implements the call to the graphics API.

void com.mxgraph.mxGdiCanvas2D.Ellipse	(	double	x,
		double	y,
		double	w,
		double	h
	)		`[inline]`

Draws an ellipse.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Fill ( ) [inline]

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.FillAndStroke ( ) [inline]

Implements com.mxgraph.mxICanvas2D.

String com.mxgraph.mxGdiCanvas2D.GetFontName ( String family ) [inline, protected]

Returns a font name for the given font family.

Rectangle com.mxgraph.mxGdiCanvas2D.GetImageBounds	(	Image	img,
		double	x,
		double	y,
		double	w,
		double	h,
		bool	aspect
	)		`[inline, protected]`

Returns the bounds for the given image.

Size com.mxgraph.mxGdiCanvas2D.GetImageSize ( Image image ) [inline, protected]

Returns the size for the given image.

void com.mxgraph.mxGdiCanvas2D.Image	(	double	x,
		double	y,
		double	w,
		double	h,
		String	src,
		bool	aspect,
		bool	flipH,
		bool	flipV
	)		`[inline]`

Draws an image.

void com.mxgraph.mxGdiCanvas2D.LineTo	(	double	x,
		double	y
	)		`[inline]`

Implements com.mxgraph.mxICanvas2D.

Image com.mxgraph.mxGdiCanvas2D.LoadImage ( String src ) [inline, protected]

Loads the specified image.

void com.mxgraph.mxGdiCanvas2D.MoveTo	(	double	x,
		double	y
	)		`[inline]`

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.PaintCurrentPath	(	bool	filled,
		bool	stroked
	)		`[inline, protected]`

Parameters:

value

void com.mxgraph.mxGdiCanvas2D.PaintShadow	(	bool	filled,
		bool	stroked
	)		`[inline, protected]`

Parameters:

value

Color com.mxgraph.mxGdiCanvas2D.ParseColor ( string hex ) [inline, protected]

Helper method that uses mxUtils#parseColor(String). Subclassers.

can override this to implement caching for frequently used colors.

void com.mxgraph.mxGdiCanvas2D.QuadTo	(	double	x1,
		double	y1,
		double	x2,
		double	y2
	)		`[inline]`

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Rect	(	double	x,
		double	y,
		double	w,
		double	h
	)		`[inline]`

Draws a rectangle.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Restore ( ) [inline]

Restores the last canvas state.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Rotate	(	double	theta,
		bool	flipH,
		bool	flipV,
		double	cx,
		double	cy
	)		`[inline]`

Rotates the canvas.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Roundrect	(	double	x,
		double	y,
		double	w,
		double	h,
		double	dx,
		double	dy
	)		`[inline]`

Draws a rounded rectangle.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Save ( ) [inline]

Saves the current canvas state.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Scale ( double value ) [inline]

Sets the given scale.

Parameters:

value

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.SetGradient	(	String	color1,
		String	color2,
		double	x,
		double	y,
		double	w,
		double	h,
		String	direction,
		double	alpha1,
		double	alpha2
	)		`[inline]`

Sets the given gradient.

void com.mxgraph.mxGdiCanvas2D.SetShadowOffset	(	double	dx,
		double	dy
	)		`[inline]`

Prepares the canvas to draw a gradient.

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Stroke ( ) [inline]

Implements com.mxgraph.mxICanvas2D.

void com.mxgraph.mxGdiCanvas2D.Text	(	double	x,
		double	y,
		double	w,
		double	h,
		string	str,
		string	align,
		string	valign,
		bool	wrap,
		string	format,
		string	overflow,
		bool	clip,
		double	rotation
	)		`[inline]`