org.das2.graph.GraphUtil

Utilities for drawing graphics and establishing standard behavior. This provides functions to get a 16x16 icon for a color, getting a Path from a series of data points, and a "visualize" method for simply looking at some data.

GraphUtil( )

FILL_TEXTURE_CROSSHASH

FILL_TEXTURE_HASH

FILL_TEXTURE_BACKHASH

FILL_TEXTURE_SOLID

FILL_TEXTURE_NONE

CONNECT_MODE_HISTOGRAM

draw the lines in histogram mode, horizontal to the half-way point, then vertical, then horizontal the rest of the way.

CONNECT_MODE_SCATTER

don't draw connecting lines.

CONNECT_MODE_SERIES

the normal connecting mode from point-to-point in a series.

MAX_TICKS

limit the number of ticks which are computed

blurImage

blur the image with a Guassian blur.

Parameters

Returns:

calculateAT

calculates the AffineTransform between two sets of x and y axes, if possible.

Parameters

Returns:

calculateManualTicks

calculate a TickVDescriptor for the ticks. Example specifications:

• +20 - every 20 units, whatever the data units are.
• +20s - every 20 seconds
• 0,20,40,60,100 - explicit locations.
• +20s/4 - every 20 seconds, with four minor divisions.
• +20s/5,10,15 - minor ticks repeat each 20s.
• 100,200,300/50,150,250,350 - explicit list of major and minor ticks.
• *10/+1 - log ticks with linear minor ticks.
• none - no ticks

Parameters

Returns:

See Also:

clipPath

clip the path to within the clip rectangle. Note this may introduce breaks where the path was continuous before. Note this does not work with quadTo etc. This was motivated by an old version of Adobe Illustrator which didn't respect the clip set in the PDF, and with the journal Nature, which apparently uses an old version of Illustrator.

Parameters

Returns:

colorIcon

return an icon block with the color and size.

Parameters

Returns:

colorImageIcon

return an ImageIcon with the color and size.

Parameters

Returns:

copyAxis

return a copy of the plot. It does not have the row and column set to its own row and column.

Parameters

Returns:

copyColorBar

return a copy of the plot. It does not have the row and column set to its own row and column.

Parameters

Returns:

copyPlot

return a copy of the plot. This will include the Renderers and the data they contain. The plot is not attached to a canvas or row and column.

 
   cnvsNew= new DasCanvas(500,500);
   row= new DasRow(cnvsNew,0.2,0.8);
   column= new DasColumn(cnvsNew,0.2,0.8);
   p= GraphUtil.copyPlot(dp); 
   cnvsNew.add(p,row,column); 
 
 

Parameters

Returns:

describe

describe the path for debugging.

Parameters

Returns:

fillWithTexture

fill the region using the specified fillTexture.

Parameters

Returns:

See Also:

getATScaleTranslateString

return a string representation of the affine transforms used in DasPlot for debugging.

Parameters

Returns:

getFontConverter

converts forward from relative font spec to point size, used by the annotation and axis nodes.

Parameters

Returns:

getGaussianBlurFilter

return a Gaussian filter for blurring images.

Parameters

Returns:

getPath

get the path for the points, checking for breaks in the data from fill values.

Parameters

Returns:

getRicePaperColor

return translucent white color for indicating the application is busy.

Returns:

getSegNameFor

print the name for the segment type

Parameters

Returns:

getSlopeIntercept

calculates the slope and intercept of a line going through two points.

Parameters

Returns:

guessPlot

get a plot and renderer for the dataset.

Parameters

Returns:

guessRenderer

legacy guess that is used who-knows-where. Autoplot has much better code for guessing, refer to it.

Parameters

Returns:

guessXAxis

Parameters

Returns:

guessYAxis

Parameters

Returns:

guessZAxis

Parameters

Returns:

invTransformRange

Parameters

Returns:

lineIntersection

returns the point where the two line segments intersect, or null.

Parameters

Returns:

lineRectangleIntersection

return the intersection of a line segment and the edge of a rectangle, where one point is outside of the rectangle and one is inside.

Parameters

Returns:

lineRectangleMask

return the line segment which is within the rectangle mask.

Parameters

Returns:

newDasPlot

create a plot for the canvas, along with the row and column for layout.

Parameters

Returns:

newGrannyTextEditor

return a GrannyTextEditor with the Das2Core extras added.

Returns:

newGrannyTextRenderer

return a GrannyTextEditor with the Das2Core extras added. Examples include:

psym;circles;size=0.5em;color=red
• block
• img;https://autoplot.org/Logo96.png;50%

Returns:

parseLayoutLength

parse strings like "14em+2pt" into a length in pixels.

• "1em",0,8 -> 8
• "50%",240,0 -> 120
• "4pt",240,8 -> 4
• "4px",240,8 -> 4
• "1em+4pt",240,8 -> 12

Parameters

Returns:

See Also:

perpendicularLine

create a line perpendicular to the line segment line, which would go through p, and have length abs(len). If len is negative, then line.p1,line.p2,p is counter-clockwise. This is left unimplemented as it's a nice student project.

Parameters

Returns:

pointsAlongCurve

return the points along a curve. Used by ContourRenderer. The returned result is the remaining path length. Elements of pathlen that are beyond the total path length are not computed, and the result points will be null. Note that CUBICTO and QUADTO are not supported.

Parameters

Returns:

reducePath

Returns the input GeneralPath filled with new points which will be rendered identically to the input path, but contains a minimal number of points. We bin average the points within a cell, because discretization would mess up the label orientation in contour plotting. a new GeneralPath which will be rendered identically to the input path, but contains a minimal number of points.

Parameters

Returns:

reducePath20140622

New ReducePath reduces a path by keeping track of vertically collinear points, and reducing them to an entry point, an exit point, min and max. This can be all four in one point. We also limit the resolution and combine points that are basically the same value, using resn and resd (numerator and denominator). For example (1/5) would mean that points within x of 1/5 of one another are considered vertically collinear.

Parameters

Returns:

shortenLine

return line shorted by so many pixels at each end.

Parameters

Returns:

shrinkRectangle

return rectangle with same center that is percent/100 of the original width and height.

Parameters

Returns:

transformRange

returns pixel range of the datum range, guarenteeing that the first element will be less than or equal to the second.

Parameters

Returns:

visualize

get a plot and add it to a JFrame.

Parameters

Returns: