Implementation of a canvas that uses GDI for painting. More...

Inheritance diagram for com.mxgraph.mxGdiCanvas:

Public Member Functions
	mxGdiCanvas ()
	Constructs a new GDI canvas.
	mxGdiCanvas (Graphics g)
	Constructs a new GDI canvas for the given graphics instance.
override Object	DrawCell (mxCellState state)
	see com.mxgraph.mxICanvas.DrawCell()
override Object	DrawLabel (string text, mxCellState state, bool html)
	see com.mxgraph.mxICanvas.DrawLabel()
void	DrawShape (int x, int y, int w, int h, Dictionary< string, Object > style)
	Draws the shape specified with the STYLE_SHAPE key in the given style.
void	DrawLine (List< mxPoint > pts, Dictionary< string, Object > style)
	Draws the given lines as segments between all points of the given list of mxPoints.
mxPoint	DrawMarker (Object type, mxPoint p0, mxPoint pe, float size, Pen pen)
	Draws the given type of marker.
void	DrawText (string text, int x, int y, int w, int h, Dictionary< string, Object > style)
	Draws the specified text either using drawHtmlString or using drawString.
void	Destroy ()
	Destroys the canvas and frees all allocated resources.
Static Public Member Functions
static int	getArcSize (int w, int h)
	Computes the arc size for the given dimension.
Static Public Attributes
static bool	PRESERVE_IMAGE_ASPECT = true
	Specifies if image aspect should be preserved in drawImage.
Protected Member Functions
Image	LoadImage (String image)
	Returns an image instance for the given URL. If the URL has been loaded before than an instance of the same instance is returned as in the previous call.
void	DrawGlassEffect (int x, int y, int w, int h, Dictionary< string, Object > style)
	Draws the glass effect.
void	DrawPolygon (Point[] polygon, Brush brush, Pen pen, bool shadow)
	Draws a a polygon for the given parameters.
void	DrawPath (GraphicsPath path, Brush brush, Pen pen, bool shadow)
	Draws a path for the given parameters.
void	DrawRect (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow, bool rounded)
	Draws a rectangle for the given parameters.
void	DrawImage (int x, int y, int w, int h, String image)
	Draws an image for the given parameters.
void	DrawImage (int x, int y, int w, int h, String image, bool preserveAspect, bool flipH, bool flipV)
	Draws an image for the given parameters.
void	DrawOval (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow)
	Draws an oval for the given parameters.
void	DrawRhombus (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow)
	Draws an rhombus (aka. diamond) for the given parameters.
void	DrawCylinder (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow)
	Draws a cylinder for the given parameters.
void	DrawActor (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow)
	Draws an actor shape for the given parameters.
void	DrawCloud (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow)
	Draws a cloud shape for the given parameters.
void	DrawTriangle (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow, string direction)
	Draws a triangle shape for the given parameters.
void	DrawHexagon (int x, int y, int w, int h, Brush brush, Pen pen, bool shadow, string direction)
	Draws a hexagon shape for the given parameters.
Protected Attributes
Dictionary< string, Image >	imageCache = new Dictionary<string, Image>()
	Cache for loading images.
Graphics	g
	Global graphics handle to the image.
Properties
Graphics	Graphics `[get, set]`
	Sets or gets the graphics object to paint the canvas.

Detailed Description

Implementation of a canvas that uses GDI for painting.

Constructor & Destructor Documentation

com.mxgraph.mxGdiCanvas.mxGdiCanvas ( ) [inline]

Constructs a new GDI canvas.

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

Constructs a new GDI canvas for the given graphics instance.

Member Function Documentation

void com.mxgraph.mxGdiCanvas.Destroy ( ) [inline]

Destroys the canvas and frees all allocated resources.

void com.mxgraph.mxGdiCanvas.DrawActor	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow
	)		`[inline, protected]`

Draws an actor shape for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.

override Object com.mxgraph.mxGdiCanvas.DrawCell ( mxCellState state ) [inline, virtual]

see com.mxgraph.mxICanvas.DrawCell()

Implements com.mxgraph.mxBasicCanvas.

void com.mxgraph.mxGdiCanvas.DrawCloud	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow
	)		`[inline, protected]`

Draws a cloud shape for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.

void com.mxgraph.mxGdiCanvas.DrawCylinder	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow
	)		`[inline, protected]`

Draws a cylinder for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.

void com.mxgraph.mxGdiCanvas.DrawGlassEffect	(	int	x,
		int	y,
		int	w,
		int	h,
		Dictionary< string, Object >	style
	)		`[inline, protected]`

Draws the glass effect.

void com.mxgraph.mxGdiCanvas.DrawHexagon	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow,
		string	direction
	)		`[inline, protected]`

Draws a hexagon shape for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.
direction	Specifies the direction of the hexagon.

void com.mxgraph.mxGdiCanvas.DrawImage	(	int	x,
		int	y,
		int	w,
		int	h,
		String	image
	)		`[inline, protected]`

Draws an image for the given parameters.

Parameters:

x	X-coordinate of the image.
y	Y-coordinate of the image.
w	Width of the image.
h	Height of the image.
image	URL of the image.

void com.mxgraph.mxGdiCanvas.DrawImage	(	int	x,
		int	y,
		int	w,
		int	h,
		String	image,
		bool	preserveAspect,
		bool	flipH,
		bool	flipV
	)		`[inline, protected]`

Draws an image for the given parameters.

Parameters:

x	X-coordinate of the image.
y	Y-coordinate of the image.
w	Width of the image.
h	Height of the image.
image	URL of the image.

override Object com.mxgraph.mxGdiCanvas.DrawLabel	(	string	text,
		mxCellState	state,
		bool	html
	)		`[inline, virtual]`

see com.mxgraph.mxICanvas.DrawLabel()

Implements com.mxgraph.mxBasicCanvas.

void com.mxgraph.mxGdiCanvas.DrawLine	(	List< mxPoint >	pts,
		Dictionary< string, Object >	style
	)		`[inline]`

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.

mxPoint com.mxgraph.mxGdiCanvas.DrawMarker	(	Object	type,
		mxPoint	p0,
		mxPoint	pe,
		float	size,
		Pen	pen
	)		`[inline]`

Draws the given type of marker.

Parameters:

type
p0
pe
size
pen

Returns:

void com.mxgraph.mxGdiCanvas.DrawOval	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow
	)		`[inline, protected]`

Draws an oval for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.

void com.mxgraph.mxGdiCanvas.DrawPath	(	GraphicsPath	path,
		Brush	brush,
		Pen	pen,
		bool	shadow
	)		`[inline, protected]`

Draws a path for the given parameters.

Parameters:

path	Path object to be drawn.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.

void com.mxgraph.mxGdiCanvas.DrawPolygon	(	Point[]	polygon,
		Brush	brush,
		Pen	pen,
		bool	shadow
	)		`[inline, protected]`

Draws a a polygon for the given parameters.

Parameters:

polygon	Points of the polygon.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.

void com.mxgraph.mxGdiCanvas.DrawRect	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow,
		bool	rounded
	)		`[inline, protected]`

Draws a rectangle for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.
rounded	Boolean indicating if the rectangle is rounded.

void com.mxgraph.mxGdiCanvas.DrawRhombus	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow
	)		`[inline, protected]`

Draws an rhombus (aka. diamond) for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.

void com.mxgraph.mxGdiCanvas.DrawShape	(	int	x,
		int	y,
		int	w,
		int	h,
		Dictionary< string, Object >	style
	)		`[inline]`

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.

void com.mxgraph.mxGdiCanvas.DrawText	(	string	text,
		int	x,
		int	y,
		int	w,
		int	h,
		Dictionary< string, Object >	style
	)		`[inline]`

Draws the specified text either using drawHtmlString or using drawString.

Parameters:

text
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.

void com.mxgraph.mxGdiCanvas.DrawTriangle	(	int	x,
		int	y,
		int	w,
		int	h,
		Brush	brush,
		Pen	pen,
		bool	shadow,
		string	direction
	)		`[inline, protected]`

Draws a triangle shape for the given parameters.

Parameters:

x	X-coordinate of the shape.
y	Y-coordinate of the shape.
w	Width of the shape.
h	Height of the shape.
brush	Optional brush for painting the background.
pen	Optional pen for painting the border.
shadow	Boolean indicating if a shadow should be painted.
direction	Specifies the direction of the triangle.

static int com.mxgraph.mxGdiCanvas.getArcSize	(	int	w,
		int	h
	)		`[inline, static]`

Computes the arc size for the given dimension.

Parameters:

w	Width of the rectangle.
h	Height of the rectangle.

Returns:: Returns the arc size for the given dimension.

Image com.mxgraph.mxGdiCanvas.LoadImage ( String image ) [inline, protected]

Returns an image instance for the given URL. If the URL has been loaded before than an instance of the same instance is returned as in the previous call.