Graphics

Functions
int	pvSetZoomX (PARAM *p, int id, float zoom)
int	pvSetZoomY (PARAM *p, int id, float zoom)
int	gWriteFile (const char *file)
int	gCloseFile ()
int	gBeginDraw (PARAM *p, int id)
int	gBox (PARAM *p, int x, int y, int w, int h)
int	gRect (PARAM *p, int x, int y, int w, int h)
int	gEndDraw (PARAM *p)
int	gLineTo (PARAM *p, int x, int y)
int	gBufferedLine (PARAM *p)
int	gLine (PARAM *p, float *x, float *y, int n)
int	gMoveTo (PARAM *p, int x, int y)
int	gRightYAxis (PARAM *p, float start, float delta, float end, int draw)
int	gSetColor (PARAM *p, int r, int g, int b)
int	gSetWidth (PARAM *p, int w)
int	gSetStyle (PARAM *p, int style)
int	gDrawArc (PARAM *p, int x, int y, int w, int h, int start_angle, int angle_length)
int	gDrawPie (PARAM *p, int x, int y, int w, int h, int start_angle, int angle_length)
int	gDrawPolygon (PARAM *p, int *x, int *y, int n)
int	gSetFont (PARAM *p, const char *family, int size, int weight, int italic)
int	gSetLinestyle (PARAM *p, int style)
int	gText (PARAM *p, int x, int y, const char *text, int alignment)
int	gTextInAxis (PARAM *p, float x, float y, const char *text, int alignment)
int	gSetFloatFormat (PARAM *p, const char *text)
int	gXAxis (PARAM *p, float start, float delta, float end, int draw)
int	gYAxis (PARAM *p, float start, float delta, float end, int draw)
int	gXGrid (PARAM *p)
int	gYGrid (PARAM *p)
int	gBoxWithText (PARAM *p, int x, int y, int w, int h, int fontsize, const char *xlabel, const char *ylabel, const char *rylabel)
int	gComment (PARAM *p, const char *comment)
int	gPlaySVG (PARAM *p, const char *filename)
int	gSocketPlaySVG (PARAM *p, const char *svgstring)
int	gTranslate (PARAM *p, float x, float y)
int	gRotate (PARAM *p, float angle)
int	gScale (PARAM *p, float sx, float sy)
int	pvSetSelector (PARAM *p, int id, int state)
int	pvPrintSvgOnPrinter (PARAM *p, int id)

Detailed Description

These are the graphis routines usable with pyQDrawWidget()

Function Documentation

gBeginDraw()

int gBeginDraw	(	PARAM *	p,
		int	id
	)

Call this function before you start drawing the widget.

gBox()

int gBox	(	PARAM *	p,
		int	x,
		int	y,
		int	w,
		int	h
	)

Draws a rectangle frame. Later you can use it's coordinates to draw xAxis, yAxiy and ryAxis.

gBoxWithText()

int gBoxWithText	(	PARAM *	p,
		int	x,
		int	y,
		int	w,
		int	h,
		int	fontsize,
		const char *	xlabel,
		const char *	ylabel,
		const char *	rylabel
	)

This is a convenience function that draws a box and write the xlabel ylabel and rylabel
in the given font.
If one of the text parameters is NULL no text is drawn for that item.

gBufferedLine()

int gBufferedLine

(

PARAM *

p

)

Draw a line in a Axis.
See pvXYAllocate
See also Linestyle.

gCloseFile()

int gCloseFile

(

)

Call this function after you have written graphical commands to a file.

gComment()

int gComment	(	PARAM *	p,
		const char *	comment
	)

Write a comment in the metafile

gDrawArc()

int gDrawArc	(	PARAM *	p,
		int	x,
		int	y,
		int	w,
		int	h,
		int	start_angle,
		int	angle_length
	)

Draw an arc. For circle write:
  gDrawArc(p,x-radius/2,y-radius/2,radius/2,radius/2,0,360);

gDrawPie()

int gDrawPie	(	PARAM *	p,
		int	x,
		int	y,
		int	w,
		int	h,
		int	start_angle,
		int	angle_length
	)

Draw an pie (filled part of a circle) . For filled circle write:
  gDrawArc(p,x-radius/2,y-radius/2,radius/2,radius/2,0,360);

gDrawPolygon()

int gDrawPolygon	(	PARAM *	p,
		int *	x,
		int *	y,
		int	n
	)

x,y is an array with the edge points.
n is the number of points

gEndDraw()

int gEndDraw

(

PARAM *

p

)

Call this function when you are finished with drawing.

gLine()

int gLine	(	PARAM *	p,
		float *	x,
		float *	y,
		int	n
	)

Draw a line in a Axis n=number of values in x,y.
See also Linestyle.

gLineTo()

int gLineTo	(	PARAM *	p,
		int	x,
		int	y
	)

Draw a line from the actual position to x,y.

gMoveTo()

int gMoveTo	(	PARAM *	p,
		int	x,
		int	y
	)

Move to x,y.

gPlaySVG()

int gPlaySVG	(	PARAM *	p,
		const char *	filename
	)

Play SVG file
You have to download the file first using:
int pvDownloadFile(PARAM *p, const char *filename);

Attention:
This is a deprecated function.
It only works with the Qt3 version of pvbrowser client.
Now use rlSvgAnumator from rllib.

gRect()

int gRect	(	PARAM *	p,
		int	x,
		int	y,
		int	w,
		int	h
	)

Draws a filled rectangle.

gRightYAxis()

int gRightYAxis	(	PARAM *	p,
		float	start,
		float	delta,
		float	end,
		int	draw
	)

Draw a Axis on the right side of the diagram.
It starts with start in steps of delta until end is reached.

gRotate()

int gRotate	(	PARAM *	p,
		float	angle
	)

Rotate the graphic
Rotates the coordinate system angle degrees counterclockwise.

gScale()

int gScale	(	PARAM *	p,
		float	sx,
		float	sy
	)

Scale the graphic

gSetColor()

int gSetColor	(	PARAM *	p,
		int	r,
		int	g,
		int	b
	)

Set the drawing color.

gSetFloatFormat()

int gSetFloatFormat	(	PARAM *	p,
		const char *	text
	)

Set the format in which the Axis is drawn.
default: "%f"
For example set
"%5.2f"
if you want two digits behind the .

gSetFont()

int gSetFont	(	PARAM *	p,
		const char *	family,
		int	size,
		int	weight,
		int	italic
	)

Set a font. For the availabe fonts see Definitions (Events, Fonts, Colors ...)

gSetLinestyle()

int gSetLinestyle	(	PARAM *	p,
		int	style
	)

Set the linestyle of a line in the Axis. You can draw a simple line or a line with centered symbols.

gSetStyle()

int gSetStyle	(	PARAM *	p,
		int	style
	)

style = PenStyle.

gSetWidth()

int gSetWidth	(	PARAM *	p,
		int	w
	)

Set the line width

gSocketPlaySVG()

int gSocketPlaySVG	(	PARAM *	p,
		const char *	svgstring
	)

Play SVG string over the socket

Attention:
This is a deprecated function.
It only works with the Qt3 version of pvbrowser client.
Now use rlSvgAnumator from rllib.

gText()

int gText	(	PARAM *	p,
		int	x,
		int	y,
		const char *	text,
		int	alignment
	)

Draw a text at x,y.
For alignment see Definitions (Events, Fonts, Colors ...)

gTextInAxis()

int gTextInAxis	(	PARAM *	p,
		float	x,
		float	y,
		const char *	text,
		int	alignment
	)

Draw a text at x,y in Axis.
For alignment see Definitions (Events, Fonts, Colors ...)

gTranslate()

int gTranslate	(	PARAM *	p,
		float	x,
		float	y
	)

Translate the graphic

gWriteFile()

int gWriteFile

(

const char *

file

)

Call this function before you write graphical commands to a file.

gXAxis()

int gXAxis	(	PARAM *	p,
		float	start,
		float	delta,
		float	end,
		int	draw
	)

Draw a Axis on the bottom of the diagram.
It starts with start in steps of delta until end is reached.

gXGrid()

int gXGrid

(

PARAM *

p

)

Draw a grid orthogonal to the x-axis in the diagram.

gYAxis()

int gYAxis	(	PARAM *	p,
		float	start,
		float	delta,
		float	end,
		int	draw
	)

Draw a Axis on the left side of the diagram.
It starts with start in steps of delta until end is reached.

gYGrid()

int gYGrid

(

PARAM *

p

)

Draw a grid orthogonal to the y-axis in the diagram.

pvPrintSvgOnPrinter()

int pvPrintSvgOnPrinter	(	PARAM *	p,
		int	id
	)

Print the SVG on the QDraw widget on a printer

pvSetSelector()

int pvSetSelector	(	PARAM *	p,
		int	id,
		int	state
	)

Set Selector in QDraw Widget 0|1
default 1

pvSetZoomX()

int pvSetZoomX	(	PARAM *	p,
		int	id,
		float	zoom
	)

Zoom the image in X direction. (default: zoom=1.0)
If zoom < 0.0 then keep aspect ratio, factor = |zoom|.

pvSetZoomY()

int pvSetZoomY	(	PARAM *	p,
		int	id,
		float	zoom
	)

Zoom the image in Y direction. (default: zoom=1.0)
If zoom < 0.0 then keep aspect ratio, factor = |zoom|.