home *** CD-ROM | disk | FTP | other *** search
Text File | 1995-07-01 | 54.1 KB | 1,346 lines |
- '\"
- '\" Copyright 1991-1994 by AT&T Bell Laboratories.
- '\"
- '\" Permission to use, copy, modify, and distribute this software
- '\" and its documentation for any purpose and without fee is hereby
- '\" granted, provided that the above copyright notice appear in all
- '\" copies and that both that the copyright notice and warranty
- '\" disclaimer appear in supporting documentation, and that the
- '\" names of AT&T Bell Laboratories any of their entities not be used
- '\" in advertising or publicity pertaining to distribution of the
- '\" software without specific, written prior permission.
- '\"
- '\" AT&T disclaims all warranties with regard to this software, including
- '\" all implied warranties of merchantability and fitness. In no event
- '\" shall AT&T be liable for any special, indirect or consequential
- '\" damages or any damages whatsoever resulting from loss of use, data
- '\" or profits, whether in an action of contract, negligence or other
- '\" tortuous action, arising out of or in connection with the use or
- '\" performance of this software.
- '\"
- '\" Graph widget created by Sani Nassif and George Howlett.
- '\"
- .so man.macros
- .HS blt_graph cmds
- .BS
- '\" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- blt_graph \- Create and manipulate graph widgets
- .SH SYNOPSIS
- \fBblt_graph\fI \fIpathName \fR?\fIoptions\fR?
- .SH "STANDARD OPTIONS"
- .LP
- .nf
- .ta 4c 8c 12c
- \fBbackground\fR \fBcursor\fR \fBforeground\fR
- \fBborderWidth\fR \fBfont\fR \fBrelief\fR
- .fi
- .LP
- See the ``options'' manual entry for details on the standard options.
- .ta 4c
- .SH "WIDGET-SPECIFIC OPTIONS"
- .LP
- .nf
- .ta 4c 8c 12c
- \fBbottomMargin\fR \fBleftMargin\fR \fBtitle\fR
- \fBbufferElements\fR \fBplotBackground\fR \fBtopMargin\fR
- \fBhalo\fR \fBplotBorderWidth\fR \fBwidth\fR
- \fBheight\fR \fBplotRelief\fR
- \fBinvertxy\fR \fBrightMargin\fR
- .fi
- .BE
- .SH DESCRIPTION
- .PP
- The \fBblt_graph\fR command creates a new window (given by the
- \fIpathName\fR argument) and makes it into an graph widget.
- Additional
- options, described above, may be specified on the command line
- or in the option database
- to configure aspects of the graph such as its colors and font.
- The \fBblt_graph\fR command returns its
- \fIpathName\fR argument. At the time this command is invoked,
- there must not exist a window named \fIpathName\fR, but
- \fIpathName\fR's parent must exist.
- .PP
- The \fBblt_graph\fR widget plots two-variable data in a window.
- It has of several components; coordinate axes,
- crosshairs, a legend, and a collection of elements and tags.
- .SS "COORDINATE AXES"
- The graph widget has four axes, two standard (x and y) and two alternate
- (x2 and y2). Graph elements and tags are mapped onto one x-axis and
- y-axis (by default, they are mapped onto the standard axes).
- .PP
- Each axis consists of the axis line and major and minor
- ticks placed at set intervals. At major ticks, labels (text strings)
- representing the coordinate value of the tick are drawn.
- By default, the tick labels are simply numeric strings. However,
- a Tcl procedure can be supplied to individually format each
- tick label.
- .PP
- The scale of the axis is determined its minimum and maximum limits.
- By default, each axis is auto-scaled using the data limits.
- However either limit can be set to manually scale the graph.
- .SS "CROSSHAIRS"
- Crosshairs are a set of two lines (vertical and horizontal) which
- intersect on the graph. They are implemented using XOR drawing
- primitives, so they do not require the graph to be redrawn when
- they are moved or redisplayed.
- .SS "ELEMENTS"
- A graph element is a set of data points and configuration options
- which determine how the data is displayed. Elements are created
- by the \fBelement create\fP widget command. The configuration options may
- be specified as the element is created or later by the \fBelement configure\fR
- widget command. There is an internal display list of element names which
- controls the drawing order of the elements. By default, elements are
- appended to the display list as they are created. The element display list
- can be managed by the \fBelement show\fR command.
- .SS "LEGEND"
- The legend consists of a list of entries, where each entry is an element
- symbol and label. By default, the legend is located in the right
- margin of the graph. However, the legend may appear anywhere in the
- plotting area of the graph by specifying its window coordinates.
- .SS "TAGS"
- Tags are simple drawing procedures used to annotate or highlight
- areas of the graph. A tag may be either a text string, bitmap,
- line, window, or polygon. A tag may be associated with a particular
- element, so that the tag is displayed only if the element is
- displayed. Tags are the first items drawn when the graph is displayed,
- so that elements, symbols, legend, and axes always appear in front of them.
- .PP
- Tags differ from elements in that they do not affect the auto-scaling of
- coordinate axes. Furthermore, tags can have \fIelastic\fR coordinates
- (specified by \fC-Inf\fR and \fCInf\fR respectively) which translate into
- the axis minimum or maximum limit. For example, to place a tag so it
- always remains in the lower left corner of the plot, use the coordinates
- \fC-Inf\fR,\fC-Inf\fR.
- .SH "WIDGET COMMANDS"
- .PP
- The \fBblt_graph\fR command creates a new Tcl command whose
- name is \fIpathName\fR. This
- command may be used to invoke various
- operations on the widget. It has the general form:
- .DS C
- \fIpathName option \fR?\fIarg arg ...\fR?
- .DE
- \fIOption\fR and the \fIarg\fRs
- determine the exact behavior of the command. The following
- commands are valid for \fBblt_graph\fR widgets:
- .TP
- \fIpathName \fBconfigure \fR?\fIoptions...\fR?
- Queries or modifies the configuration options of the widget.
- Valids options are described in
- .SB WIDGET OPTIONS.
- .TP
- \fIpathName \fBcrosshairs configure\fR ?\fIoptions...\fR?
- Queries or modifies the configuration options of the crosshairs.
- This command is similar to the \fBconfigure\fR command, except that it
- applies to the options of the crosshairs, whereas \fBconfigure\fR applies
- to the options for the graph as a whole. See
- .SB CROSSHAIRS OPTIONS
- for a description of valid options.
- .TP
- \fIpathName \fBcrosshairs toggle\fR
- Toggles the current state of the crosshairs, turning them on or off.
- This command returns an empty string.
- .TP
- \fIpathName \fBelement activate \fIname \fR?\fIindex...?\fR
- Specifies which data points of element \fIname\fR are to be drawn
- using active foreground and background colors. \fIName\fR is the name
- of the element and \fIindex\fR is a number representing the index of
- the data point. If no indices are present then all data points become
- active. This command returns the empty string.
- .TP
- \fIpathName \fBelement append \fIname coords\fR
- Appends pairs of x,y data points to element \fIname\fR.
- \fIcoords\fR is a list of numeric expressions (x,y graph coordinates)
- representing data points. It returns the empty string.
- .TP
- \fIpathName \fBelement closest \fIwinX winY ?name...?\fR
- Finds the data point closest to the window coordinates \fIwinX\fR and
- \fIwinY\fR in the element \fIname\fR. It returns a list containing the
- name of the closest element, the index of its closest point,
- and the graph x,y coordinates of the point. If no data point
- within a threshold distance can be found (see the \fB-halo\fR option),
- then the empty list is returned. \fIName\fR is the name of an
- element, which must be mapped. If no elements are specified, then
- all mapped elements are searched.
- .TP
- \fIpathName \fBelement configure \fIname \fR?\fIoptions...\fR?
- This command is similar to the \fBconfigure\fR command, except that it
- applies to the options of an individual element, whereas
- \fBconfigure\fR applies to the options for the graph as a whole.
- \fIOptions\fR may have any of the values accepted by the
- \fBelement create\fR widget command. See
- .SB ELEMENT OPTIONS
- for a description of valid options.
- .TP
- \fIpathName \fBelement create \fIname \fR?\fIoptions...\fR?
- Creates a new element \fIname\fP in the graph. Element names must be
- unique, so \fIname\fR can not already exist in the graph.
- If additional arguments are present, they specify any of the
- element options (see
- .SB ELEMENT OPTIONS
- ).
- .TP
- \fIpathName \fBelement deactivate \fIname ?name...?\fR
- .VS
- Deactivate the named elements. The elements will be redrawn using
- their normal foreground and background colors. \fIName\fR is the name
- of the element. This command returns the empty string.
- .VE
- .TP
- \fIpathName \fBelement delete ?\fIname ...\fR?
- Deletes the element \fIname\fR from the graph.
- Returns the empty string.
- .TP
- \fIpathName \fBelement names\fR
- Returns a list of all elements. This differs from
- \fBelement show\fR in that it returns the names of all elements, not
- just those in the element display list.
- .TP
- \fIpathName \fBelement show \fR?\fInames\fR?
- Queries or resets the element display list.
- The element display
- list defines which elements are drawn and in what order.
- \fINames\fR is a list of the elements to
- be displayed. If there is no \fInames\fR argument, the list of elements
- currently being displayed is returned.
- .TP
- \fIpathName \fBinvtransform \fIwinX winY\fP
- Performs an inverse coordinate transformation, mapping x,y window
- coordinates to graph coordinates (using the standard x and y axes).
- Returns a list of containing the x and y graph coordinates.
- .TP
- \fIpathName \fBlegend activate \fIname...\fR
- .VS
- Specifies that the legend entries of the named elements should be drawn
- with the active legend background and foreground colors. The entries may
- also be drawn with a different relief (using the \fB-activerelief\fR and
- \fB-activeborderwidth\fR options).
- \fIName\fR is the name of an element in the graph.
- .VE
- .TP
- \fIpathName \fBlegend configure \fR?\fIoptions...\fR?
- This command is similar to the \fBconfigure\fR command, except that it
- applies to the options for the legend, whereas \fBconfigure\fR applies
- to the options for the graph as a whole. See
- .SB LEGEND OPTIONS
- for a description of valid options.
- .TP
- \fIpathName \fBlegend deactivate \fIname...\fR
- .VS
- Specifies that the legend enties of the named elements should be drawn
- with the legend background and foreground colors. \fIName\fR is the
- name of an element in the graph.
- .VE
- .TP
- \fIpathName \fBlegend get \fIstring\fR
- .VS
- Returns the name of the graph element at the current screen position
- in the legend. \fIString\fR must be in the form "\fI@x,y\fR", where
- \fIx\fR and \fIy\fR are the window coordinates. If the given screen
- coordinates do not lie over a legend entry, the empty string is returned.
- .VE
- .TP
- \fIpathName \fBpostscript \fR?\fIfileName\fR? ?\fIoptions...\fR?
- Generates PostScript commands to print the graph. If no \fIfileName\fR
- argument is present, the PostScript output is returned. Otherwise,
- \fIfileName\fR is created and will contain the PostScript output. In
- this case the empty string is returned. If any \fIoption-value\fR
- pairs are present, they set configuration options controlling how the
- PostScript is generated. See
- .SB POSTSCRIPT OPTIONS
- for a description of valid options.
- .TP
- \fIpathName \fBpsconfigure \fR?\fIoptions...\fR?
- Queries or modifies the options of the \fBpostscript\fR command.
- See
- .SB POSTSCRIPT OPTIONS
- for a description of valid options.
- .TP
- \fIpathName \fBtag after \fItagId\fR ?\fItagId\fR?
- Reorders the tag display list placing the first tag specified after
- the second. If no second \fItagId\fR argument is specified, the tag
- is placed at the end of the list. This command can be used to control
- how tags are displayed since tags are drawn in the order of this
- display list. The empty string is returned.
- .TP
- \fIpathName \fBtag before \fItagId\fR ?\fItagId\fR?
- Reorders the tag display list placing the first tag specified before
- the second. If no second \fItagId\fR argument is specified, the tag
- is placed at the beginning of the list. This command can be used to
- control how tags are displayed since tags are drawn in the order of
- this display list. The empty string is returned.
- .TP
- \fIpathName \fBtag configure \fItagId\fR ?\fIoptions...\fR?
- Queries or modifies the configuration options of the particular tag.
- See
- .SB TAG OPTIONS
- for a description of valid options.
- .TP
- \fIpathName \fBtag coords \fItagId\fR ?\fIcoords\fR?
- Queries or resets the coordinates of the tag designated by
- \fItagId\fR. If \fIcoords\fR is present, it is a list of coordinate pairs
- representing the points of the tag. This list is used to re-position the tag.
- If the \fIcoords\fR argument is not present, the current list of
- coordinates for \fItagId\fR is returned.
- .TP
- \fIpathName \fBtag create \fItype\fR ?\fIcoords\fR? ?\fIoptions...\fR?
- Creates a tag of the selected type. \fIType\fR may be either
- \fCtext\fR, \fCline\fR, \fCbitmap\fR, \fCpolygon\fR, or \fCwindow\fR.
- \fIcoords\fR is a list of coordinate pairs of points used
- to position the tag. See
- .SB TAG OPTIONS
- for a description of valid options. This command returns a
- unique tag identifier, which is used as the \fItagId\fR argument in
- other tag-related commands.
- .TP
- \fIpathName \fBtag delete \fItagId\fR ?\fItagId..\fR?
- Deletes each of the specified tags. This command returns the empty string.
- .TP
- \fIpathName \fBtag ids\fR ?\fIpattern\fR?
- Returns a list of IDs of tags created. If \fIpattern\fR is supplied,
- only those tags whose IDs matching it will be returned.
- .TP
- \fIpathName \fBtag type \fItagId\fR
- Returns the type of the tag given by \fItagId\fR, such as
- \fCLine\fR or \fCText\fR.
- If \fItagId\fR is not a valid a tag identifier, the empty string is returned.
- .TP
- \fIpathName \fBtransform \fIx y\fP
- Transforms the graph coordinates into window coordinates, by mapping
- the \fIx\fR and \fIy\fR values onto the standard axes (x and y).
- Returns a list containing the x and y window coordinates.
- Please note that graph coordinates far outside of the axis range are
- not guarenteed to be accurate.
- .TP
- \fIpathName \fBxaxis configure\fR ?\fIoptions...\fR?
- .TP
- \fIpathName \fByaxis configure\fR ?\fIoptions...\fR?
- .TP
- \fIpathName \fBx2axis configure\fR ?\fIoptions...\fR?
- .TP
- \fIpathName \fBy2axis configure\fR ?\fIoptions...\fR?
- Queries or modifies the configuration options of the coordinate axis.
- See
- .SB AXIS OPTIONS
- for a description of valid options.
- .TP
- \fIpathName \fBxaxis limits\fR
- .TP
- \fIpathName \fByaxis limits\fR
- .TP
- \fIpathName \fBx2axis limits\fR
- .TP
- \fIpathName \fBy2axis limits\fR
- Returns a list of two graph coordinates representing the minimum and maximum
- limits of the x-axis. The format of the list returned is \fCmin max\fR.
- .sp 1
- .SH "CONFIGURATION OPTIONS"
- .SS "WIDGET OPTIONS"
- The following widget options are valid for the \fBconfigure\fR command.
- .DS
- \fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR?
- .DE
- The \fBconfigure\fR command queries or modifies the configuration options
- of the widget. If no \fIoption\fR is specified, returns a list
- describing all of the
- available options for \fIpathName\fR (see \fBTk_ConfigureInfo\fR for
- information on the format of this list).
- If \fIoption\fR is specified with no \fIvalue\fR, then the command
- returns a list describing the one named option (this list will be
- identical to the corresponding sublist of the value returned if
- no \fIoption\fR is specified). If one or more \fIoption\-value\fR
- pairs are specified, then the command
- modifies the given widget option(s) to have the given value(s); in
- this case the command returns the empty string.
- .TP
- \fB\-bottommargin \fIpixels\fR
- Specifies the size of the margin from the x-coordinate axis to the
- bottom of the window. The x-axis title is displayed in this margin.
- \fIPixels\fR may be specified in any of the forms described in
- \fBTk_GetPixels\fR. If \fIpixels\fR is less than one pixel, the
- the margin size is selected automatically.
- .TP
- \fB\-bufferelements \fIboolean\fR
- .VS
- Specifies whether to use a pixmap to cache the display of elements.
- This is especially useful when there are many data points or the
- graph is redrawn frequently. \fIBoolean\fR is \fCtrue\fR by default.
- .VE
- .TP
- \fB\-halo \fIpixels\fR
- Specifies a threshold distance when searching for the closest data
- point (see the \fBelement closest\fR command). Only data points
- within this distance are considered in the search.
- If this option isn't specified, it defaults to \fC0.5i\fR.
- .TP
- \fB\-height \fIpixels\fR
- Specifies a desired window height that the graph widget should
- request from its geometry manager. The default height is \fC400\fR.
- .TP
- \fB\-invertxy \fIboolean\fR
- .VS
- Specifies that placement of the x and y axes should be inverted.
- If \fIboolean\fR is \fCtrue\fR, the x-axis is exchanged with the
- y-axis. By default \fIboolean\fR is \fCfalse\fR.
- .VE
- .TP
- \fB\-leftmargin \fIpixels\fR
- Sets the size of the margin from the left edge of the window to the
- the y-coordinate axis. The y-axis title is displayed in this
- margin. If \fIpixels\fR is less than one pixel,
- the margin size is selected automatically.
- .TP
- \fB\-plotbackground \fIcolor\fR
- Sets the background color of the plotting area.
- .TP
- \fB\-plotborderwidth \fIpixels\fR
- Sets the width of the 3-D border to draw around the outside of
- the plotting area (if such border is being drawn; the \fBplotrelief\fR option
- determines this). By default is the plot border width is \fC2\fR.
- .TP
- \fB\-plotrelief \fIstring\fR
- Specifies the 3-D effect desired for the plotting area.
- \fIString\fR must be in a form accepted by \fBTk_GetRelief\fR.
- It indicates how the interior of the plotting area should appear
- relative to rest of the graph; for example, \fCraised\fR means the
- plot should appear to protrude from the graph, relative to the surface
- of the graph. By default, the plot relief is \fCsunken\fR.
- .TP
- \fB\-rightmargin \fIpixels\fR
- Sets the size of marging from the plotting area to the right edge
- of the window. By default, the legend is displayed in this margin.
- If \Ipixels\fR is than 1, the margin size
- is selected automatically.
- .TP
- \fB\-title \fIstring\fR
- Specifies the title of the graph. If \fIstring\fR is the empty string
- (the default), no title is displayed.
- .TP
- \fB\-topmargin \fIpixels\fR
- Sets the size of the marging the top edge of the window to the plotting area.
- The graph title is displayed in this margin.
- If \fIpixels\fR is less than 1, the margin size
- is selected automatically.
- .TP
- \fB\-width \fIpixels\fR
- Specifies a desired window width that the graph widget should
- request from its geometry manager. The default width is \fC400\fR.
- .sp 1
- .SS "AXIS OPTIONS"
- The following options are valid for the \fBxaxis configure\fR,
- \fByaxis configure\fR, \fBx2axis configure\fR, and the \fBy2axis configure\fR commands.
- .DS
- \fIpathName \fBxaxis configure \fR?\fIoptions...\fR?
-
- \fIpathName \fByaxis configure \fR?\fIoptions...\fR?
-
- \fIpathName \fBx2axis configure \fR?\fIoptions...\fR?
-
- \fIpathName \fBy2axis configure \fR?\fIoptions...\fR?
- .DE
- In addition, axis configuration options may be initialized by the
- \fBoption\fR command. The name fields in the \fBblt_graph\fR
- option database are
- prefixed by \fCx\fR, \fCy\fR, \fCx2\fR, or \fCy2\fR while
- the class fields are prefixed by \fCAxis\fR. The following example sets
- the color of all axes to blue and the x-axis scale to logarithmic.
- .DS
- \fCoption add *Blt_graph.AxisColor blue\fR
- \fCoption add *Blt_graph.xLogscale true\fR
- .DE
- .TP
- \fB\-color \fIcolor\fR
- Sets the color of the axis and its labels.
- This option defaults to \fCblack\fR.
- .TP
- \fB\-command \fIprefix\fR
- Specifies a Tcl command to be invoked when formatting the axis labels.
- \fIPrefix\fR is typically just the name of a Tcl procedure, but the string
- may also contain extra arguments for the procedure. When invoked, two
- arguments (the path name of the graph widget and the numeric value of
- the axis label) are appended to the end of the command. The procedure
- value should be a string representing the formatted label. If the value is
- the empty string or if \fIprefix\fR is the empty string, the default axis
- label is displayed. Please note that this procedure is invoked during
- the display of the graph. Resetting graph configurations within this
- procedure can cause unexpected results.
- .TP
- \fB\-descending \fIboolean\fR
- .VS
- Specifies whether the values along the axis are increasing or decreasing.
- If \fIboolean\fR is true, the axis values will decrease.
- By default, the axis values increase.
- .VE
- .TP
- \fB\-font \fIfontName\fR
- Specifies the font for axis labels. If
- \fIfontName\fR isn't specified then it defaults to
- \fC*-Courier-Bold-R-Normal-*-100-*\fR.
- .TP
- \fB\-linewidth \fIpixels\fR
- Sets the line width of the axis and its ticks. The default line
- width is \fC0\fR.
- .TP
- \fB\-logscale \fIboolean\fR
- Sets the scale of the coordinate axis (either logarithmically or
- linearly). If \fIboolean\fR is \fCtrue\fR, the axis will be displayed
- in logarithmic scale. \fIBoolean\fR must be a value accepted by
- \fBTcl_GetBoolean\fR. By default, the scale is linear.
- .TP
- \fB\-loose \fIboolean\fR
- Indicates that when auto-scaling the axis, the axis range
- should fit loosely around the data points at the outer tick intervals.
- Otherwise the axis range fits tightly at the limits of the data displayed.
- By default, the range is tight.
- .TP
- \fB\-mapped \fIboolean\fR
- Specifies if the axis should be displayed. By default, the standard
- axes are displayed (x and y), but not the alternate (x2 and y2).
- .TP
- \fB\-max \fIvalue\fR
- Sets the maximum limit of the axis. Data points exceeding this
- limit are clipped at this value. If \fIvalue\fR is the empty string
- (the default), the axis is auto-scaled whereby the maximum limit is
- determined from the data points of the displayed elements.
- .TP
- \fB\-min \fIvalue\fR
- Sets the minimum limit of the axis. Data points less than this
- limit are clipped at this value. If \fIvalue\fR is the empty string
- (the default), the axis is auto-scaled whereby the minimum limit is
- determined from the data points of the displayed elements.
- .TP
- \fB\-rotate \fItheta\fR
- Specifies the rotation of the axis labels. \fITheta\fR is a
- real number representing the angle of rotation in degrees.
- The default rotation is \fC0.0\fR degrees.
- .TP
- \fB\-showticks \fIboolean\fR
- Indicates if axis ticks should be displayed. If \fIboolean\fR is
- \fCtrue\fR (the default), ticks are displayed.
- .TP
- \fB\-stepsize \fIvalue\fR
- Sets the step size between major axis ticks. \fIValue\fR must be
- greater than zero and less than the axis range, or the requested step size
- is ignored and the step size is automatically calculated based
- upon the element data points.
- .TP
- \fB\-subticks \fInumber\fR
- Sets the number of minor axis ticks to be displayed. By default, the
- number of minor ticks is \fC5\fR. If \fInumber\fR is zero, no subticks
- will be displayed.
- .TP
- \fB\-ticklength \fIpixels\fR
- .VS
- Sets the length of the ticks and subticks (subticks are one-half \fIpixels\fR).
- If \fIpixels\fR is negative, ticks will point towards the plot, instead
- of away from it. The tick length is \fC0.1i\fR.
- .VE
- .TP
- \fB\-title \fIstring\fR
- Sets the title of the axis. If \fIstring\fR is the
- empty string, no axis title will be displayed.
- .sp 1
- .SS "CROSSHAIRS OPTIONS"
- .PP
- The following options are valid for the \fBcrosshair configure\fR command.
- .DS
- \fIpathName \fBcrosshairs configure\fR ?\fIoptions...\fR?
- .DE
- In addition, crosshairs configuration options may be initialized by the
- \fBoption\fR command. The name fields in the \fBblt_graph\fR option database
- are prefixed by
- by \fCxhairs\fR and classfields are prefixed by \fCXhairs\fR.
- The following example sets the line width of the crosshairs to \fC2\fR.
- .DS
- \fCoption add *Blt_graph.xhairsLinewidth 2\fR
- .DE
- .TP
- \fB\-color \fIcolor\fR
- Sets the color of the crosshairs.
- If this option isn't specified, then it defaults to \fCblack\fR.
- .TP
- \fB\-dashes \fIdashes\fR
- Sets the dash style of the crosshairs. \fIdashes\fR
- is the number of alternatingly displayed pixels. If \fIdashes\fR is
- \fC0\fR (the default), the crosshairs will be drawn as a solid line.
- .TP
- \fB\-linewidth \fIpixels\fR
- Set the line width of crosshairs. The default line width is \fC0\fR.
- .TP
- \fB\-mapped \fIboolean\fR
- Specifies if the crosshairs should be displayed. By default,
- the crosshairs are not displayed.
- .TP
- \fB\-position \fIstring\fR
- Specifies the position of the crosshairs. \fIString\fR must be in the
- format "\fI@x,y\fR", where \fIx\fR and \fIy\fR
- are window coordinates.
- .sp 1
- .SS "ELEMENT OPTIONS"
- .PP
- The following options are valid for the \fBelement create\fR and
- \fBelement configure\fR commands.
- \fIName\fR is the name of the element to be configured.
- .DS
- \fIpathName \fBelement create \fIname\fR ?\fIoptions...\fR?
-
- \fIpathName \fBelement configure \fIname\fR ?\fIoptions...\fR?
- .DE
- In addition, element configuration options may be initialized by the
- \fBoption\fR command. The name fields in the \fBblt_graph\fR option database
- are prefixed by \fCelem\fR.
- The following example sets the symbol type of all elements to \fBline\fR
- and the line width of all elements to \fC2\fR.
- .DS
- \fCoption add *Blt_graph.elemSymbol line\fR
- \fCoption add *Blt_graph.LineWidth 2\fR
- .DE
- .TP
- \fB\-activebackground \fIcolor\fR
- Like the \fB-background\fR option, but specifies the background
- color to use when drawing data points which are active
- (see the \fBelement activate\fR command).
- .TP
- \fB\-activeforeground \fIcolor\fR
- Like the \fB-foreground\fR option, but specifies the foreground
- color to use when drawing data points which are active
- (see the \fBelement activate\fR command).
- .TP
- \fB\-activelinewidth \fIpixels\fR
- .VS
- Sets the width of the lines drawn when the element is active.
- If \fIpixels\fR is zero and the symbol is not \fCline\fR, no line
- will be drawn when the element is active.
- The default line width is \fC1\fR.
- .VE
- .TP
- \fB\-background \fIcolor\fR
- If the symbol type is \fCline\fR, then \fIcolor\fR specifies the
- background color for dashed lines. For non-line symbols, \fIcolor\fR
- specifies the fill color for the symbol (the foreground color is the
- outline). If this option isn't specified then it defaults to
- \fCwhite\fR.
- .TP
- \fB\-dashes \fIdashes\fR
- Sets the dash style for lines. \fIdashes\fR is the number of
- alternatingly colored (foreground/background) pixels. If \fIdashes\fR
- is \fC0\fR (the default), the line is drawn in a solid fashion. This
- option only has effect only if the symbol type is \fCline\fR or if the
- line width is greater than zero.
- .TP
- \fB\-data \fIvalues\fR
- Specifies the graph coordinates of the the data points to be plotted.
- \fIValues\fR is a list of valid numeric expressions.
- It this option isn't specified, it defaults to the empty string.
- .TP
- \fB\-foreground \fIcolor\fR
- Sets the foreground color of the element.
- If this option isn't specified then it defaults to \fCblack\fR.
- .TP
- \fB\-label \fIstring\fR
- Sets the element label. Labels are displayed in the
- legend next to the element symbol. If \fIstring\fR is the empty
- string, no legend entry will be displayed for the element. By
- default, the label is the name of the element.
- .TP
- \fB\-linewidth \fIpixels\fR
- Sets the width of the lines drawn. For non-\fCline\fR symbols,
- if \fIpixels\fR is greater than zero, a line is drawn between
- the symbols. The default line width is \fC0\fR.
- .TP
- \fB\-mapx \fItype\fR
- Specifies which x-axis to map the element's x-coordinates onto.
- \fIType\fR must be either \fCx\fR, \fCx2\fR, or \fCboth\fR. The default
- axis is \fCx\fR.
- .TP
- \fB\-mapy \fItype\fR
- Specifies which y-axis to map the element's y-coordinates onto.
- \fIType\fR must be either \fCy\fR, \fCy2\fR, or \fCboth\fR. The default
- axis is \fCy\fR.
- .TP
- \fB\-noretrace \fIboolean\fR
- If \fIboolean\fR is \fCtrue\fR, data points where x-coordinate values
- are not monotonically increasing (where the current x-coordinate value
- is less than the previous) indicate the start of a new line. In this
- case, no connecting line segment will be drawn from the last to the
- current point. If \fIboolean\fR is \fCfalse\fR, all points will be
- connected by line segments, regardless of their order.
- The default value is \fCfalse\fR.
- .TP
- \fB\-scale \fIvalue\fR
- Specifies a scale factor for the size of the element's symbol. The default
- scale factor is \fC1.0\fR.
- .TP
- \fB\-symbol \fItype\fR
- \fIType\fR specifies the type of symbol to use for plotting data
- points. Valid symbol types are \fCline\fR, \fCsquare\fR, \fCcircle\fR,
- \fCdiamond\fR, \fCplus\fR, \fCcross\fR, \fCsplus\fR,
- and \fCscross\fR. The default
- symbol type is \fCline\fR.
- .TP
- \fB\-trace \fIstring\fR
- .VS
- Indicates if to trace (draw lines) between data points where values
- are increasing or decreasing.
- \fIString\fR must be either
- \fCincreasing\fR, \fCdecreasing\fC, or \fCboth\fR.
- For example, if
- \fIstring\fR is \fCincreasing\fR, data points where x-coordinate
- values are not monotonically increasing (where the current
- x-coordinate value is less than the previous) indicate the start of a
- new line. In this case, no connecting line segment will be drawn from
- the last to the current point. If \fIstring\fR is \fCboth\fR, all
- points will be connected by line segments, regardless of their order.
- The default value is \fCboth\fR.
- .VE
- .TP
- \fB\-xdata \fIvalues\fR
- Specifies the x-coordinates of the data points to be plotted.
- \fIValues\fR is a list of valid numeric expressions. It this
- option isn't specified, it defaults to the empty string.
- .TP
- \fB\-ydata \fIvalues\fR
- Specifies the y-coordinates of the data points to be plotted.
- \fIValues\fR is a valid list of numeric expressions. It this
- option isn't specified, it defaults to the empty string.
- .sp 1
- .SS "LEGEND OPTIONS"
- The following options are valid for the \fBlegend configure\fR command.
- .DS
- \fIpathName \fBlegend configure \fR?\fIoptions...\fR?
- .DE
- In addition, legend configuration options may be initialized by the
- \fBoption\fR command. The name fields in the \fBblt_graph\fR
- option database are
- prefixed by \fClegend\fR. The following example initializes the
- legend foreground color to blue in the option database.
- .DS
- \fCoption add *Blt_graph.legendForeground blue\fR
- .DE
- .TP
- \fB\-activebackground \fIcolor\fR
- .VS
- Sets the active background color of the legend. All legend entries
- marked as active (see \fBlegend activate\fR command) are drawn with
- this background color.
- .VE
- .TP
- \fB\-activeborderwidth \fIpixels\fR
- .VS
- Sets the width of the 3-D border to draw around the outside of
- the each active legend entry (if such border is being drawn;
- the \fB-activerelief\fR option determines this). By default is the
- active border width is \fC2\fR.
- .VE
- .TP
- \fB\-activeforeground \fIcolor\fR
- .VS
- Sets the active foreground color of the legend. All legend entries
- marked as active (see \fBlegend activate\fR command) are drawn with
- this foreground color.
- .VE
- .TP
- \fB\-activerelief \fIstring\fR
- .VS
- Specifies the 3-D effect desired for active legend entries. \fIString\fR
- must be in a form accepted by \fBTk_GetRelief\fR.
- It indicates how the interior of the entry should appear relative to
- the legend; for
- example, \fCraised\fR means the entry should appear to protrude from
- the legend, relative to the surface of the legend. By default, the
- active legend relief is \fCflat\fR.
- .VE
- .TP
- \fB\-anchor \fIanchorPos\fR
- Tells how to position the legend relative to the positioning point for
- the legend; \fIanchorPos\fR may have any of the forms accepted by
- \fBTk_GetAnchor\fR. For example, if \fIanchorPos\fR is \fCcenter\fR
- then the legend is centered on the point; if \fIanchorPos\fR is
- \fCn\fR then the legend will be drawn such that the top center point
- of the rectangular region occupied by the legend will be at the
- positioning point. This option defaults to \fCcenter\fR.
- .TP
- \fB\-background \fIcolor\fR
- .VS
- Sets the background color of the legend. \fIcolor\fR must be a valid
- color, it can not be the empty string.
- .VE
- .TP
- \fB\-borderwidth \fIpixels\fR
- Sets the width of the 3-D border to draw around the outside of
- the legend (if such border is being drawn; the \fBrelief\fR option
- determines this). By default is the legend border width is \fC2\fR.
- .TP
- \fB\-font \fIfontName\fR
- \fIFontName\fR specifies a font to use when drawing the labels of each
- element into the legend. If this option isn't specified then it
- defaults to \fC*-Helvetica-Bold-R-Normal-*-120-*\fR.
- .TP
- \fB\-foreground \fIcolor\fR
- Sets the foreground color of the element labels in the legend.
- If this option isn't specified, then it defaults to \fCblack\fR.
- .TP
- \fB\-ipadx \fIpixels\fR
- Sets the internal padding to the width of the legend.
- Padding will be added to both the left and right and
- between the elements symbol and label.
- By default is the legend border width is \fC2\fR.
- .TP
- \fB\-ipady \fIpixels\fR
- Sets the internal padding to the height of the legend.
- Padding will be added to both the top and bottom and
- between the elements labels.
- By default is the legend border width is \fC2\fR.
- .TP
- \fB\-mapped \fIboolean\fR
- Indicates if the legend should be displayed. If \fIboolean\fR is
- \fCtrue\fR (the default), the legend will be mapped.
- .TP
- \fB\-padx \fIpixels\fR
- Specifies extra padding on the left and right of the legend.
- The default is \fC4\fR.
- .TP
- \fB\-pady \fIpixels\fR
- Specifies extra padding on the top and bottom of the legend.
- The default is \fC0\fR.
- .TP
- \fB\-position \fIstring\fR
- Sets the positioning point of the legend in window coordinates.
- This option in conjunction with the \fB-anchor\fR option, determines
- where the legend is positioned. The format of \fIstring\fR is
- "\fI@x,y\fR", where \fIx\fR and \fIy\fR are the window coordinate
- values. If \fIstring\fR is the empty string (the default), the legend
- will be displayed in the right margin (which is automatically extended
- to accommodate the legend).
- .TP
- \fB\-relief \fIstring\fR
- Specifies the 3-D effect desired for the legend. \fIString\fR must be
- in a form accepted by \fBTk_GetRelief\fR.
- It indicates how the interior of the legend should appear relative to
- the graph; for
- example, \fCraised\fR means the legend should appear to protrude from
- the graph, relative to the surface of the graph. By default, the
- legend relief is \fCsunken\fR.
- .sp 1
- .SS "TAG OPTIONS"
- .PP
- The following options are valid for the \fBtag create\fR and \fBtag configure\fR commands.
- \fITagid\fR is the identifier returned by the \fBtag create\fR command.
- .DS
- \fIpathName \fBtag create \fItype\fR ?\fIcoords\fR? ?\fIoptions...\fR?
-
- \fIpathName \fBtag configure \fItagId\fR ?\fIoptions...\fR?
- .DE
- Tag configuration options may be initialized by the
- \fBoption\fR command. The name fields in the \fBblt_graph\fR
- option database are
- prefixed by \fCbmTag\fR, \fCtextTag\fR, \fClineTag\fR,
- \fCpolyTag\fR, or \fCwinTag\fR with respect to the tag type.
- Class fields are prefixed by \fCTag\fR. The following example sets
- the background color of all tags to blue and the foreground color of
- all text tags to white.
- .DS
- \fCoption add *Blt_graph.TagBackground blue\fR
- \fCoption add *Blt_graph.textTagForeground white\fR
- .DE
- The description of tag options is broken into subsections for each tag type.
- .sp 1
- .SS "TEXT TAGS"
- A text tag displays a string of characters on a single line. They may
- be used to annotate regions of the graph. Text tags are
- created with the following widget command:
- .DS
- \fIpathName \fBtag create text \fR?\fIcoords\fR? ?\fIoptions...\fR?
- .DE
- The argument \fIcoords\fR specifies a list of two numeric
- expressions representing the graph coordinates of a point
- used to position the text on the graph.
- .P
- After the coordinate list there may be any number of
- \fIoption\fR-\fIvalue\fR pairs, each of which sets one of the
- configuration options for the tag. These same
- \fIoption\fR\-\fIvalue\fR pairs may be used in the \fBtag configure\fR
- command to change the tag's configuration. The following
- options are supported for text tags:
- .TP
- \fB\-anchor \fIanchorPos\fR
- \fIAnchorPos\fR tells how to position the text relative to the
- positioning point for the text; it may have any of the forms accepted
- by \fBTk_GetAnchor\fR. For example, if \fIanchorPos\fR is
- \fCcenter\fR then the text is centered on the point; if
- \fIanchorPos\fR is \fCn\fR then the text will be drawn such that the
- top center point of the rectangular region occupied by the text will
- be at the positioning point. This option defaults to \fCcenter\fR.
- .TP
- \fB\-background \fIcolor\fR
- Sets the background color of the text string.
- If \fIcolor\fR is the empty string, the background will be transparent.
- If this option isn't specified then it defaults to \fCwhite\fR.
- .TP
- \fB\-font \fIfontName\fR
- Specifies the text font.
- If this option isn't specified, it defaults
- \fC*-Helvetica-Bold-R-Normal-*-120-*\fR.
- .TP
- \fB\-foreground \fIcolor\fR
- Sets the foreground color of the text.
- If this option isn't specified then it defaults to \fCblack\fR.
- .TP
- \fB\-element \fIname\fR
- Associates the tag with the element \fIname\fR. If \fIname\fR is not
- the empty string (the default), the tag is displayed only if
- \fIname\fR exists and is currently being displayed (see \fBelement show\fR).
- .TP
- \fB\-mapx \fItype\fR
- Specifies which x-axis to map the tag's x-coordinates onto.
- \fIType\fR must be either \fCx\fR, \fCx2\fR, or \fCboth\fR. The default
- axis is \fCx\fR.
- .TP
- \fB\-mapy \fItype\fR
- Specifies which y-axis to map the tag's y-coordinates onto.
- \fIType\fR must be either \fCy\fR, \fCy2\fR, or \fCboth\fR. The default
- axis is \fCy\fR.
- .TP
- \fB\-rotate \fItheta\fR
- Specifies how the tag is rotated.
- \fITheta\fR is a real number representing the angle of rotation in degrees.
- The tag is first rotated along its center and is then displayed according
- to its
- anchor position. The default rotation is \fC0.0\fR degrees.
- .TP
- \fB\-text \fIstring\fR
- Sets the text string. The exact way
- in which the text string is displayed may be affected by other options
- such as \fB-anchor\fR or \fB-rotate\fR. This option defaults to the
- empty string.
- .TP
- \fB\-xoffset \fIpixels\fR
- Specifies a x-coordinate offset (in window coordinates) from the
- specified position.
- .TP
- \fB\-yoffset \fIpixels\fR
- Specifies a y-coordinate offset (in window coordinates) from the
- specified position.
- .sp 1
- .SS "LINE TAGS"
- A line tag displays one or more connected line segments on the graph.
- Line tags are created with widget commands in the form:
- .DS
- \fIpathName \fBtag create line \fR?\fIcoords\fR? ?\fIoptions...\fR?
- .DE
- The argument \fIcoords\fR specifies a list of numeric
- expressions representing the graph coordinate pairs of the points
- connecting the line.
- .P
- After the \fIcoords\fR there may be any number of \fIoption\fR-\fIvalue\fR
- pairs, each of which sets one of the configuration options
- for the tag. These same \fIoption\fR\-\fIvalue\fR pairs may be
- used in the \fBtag configure\fR command to change the tag's
- configuration.
- The following options are supported for line tags:
- .TP
- \fB\-background \fIcolor\fR
- Sets the background color of the line.
- The option is affects the line color only when the \fB-stipple\fR option
- is set.
- If this option isn't specified then it defaults to \fCwhite\fR.
- .TP
- \fB\-dashes \fIdashes\fR
- Sets the dash style of the line. \fIDashes\fR
- is the number of alternatingly displayed pixels. If \fIdashes\fR is
- \fC0\fR (the default), the tag will be drawn as a solid line.
- .TP
- \fB\-element \fIname\fR
- Associates the tag with the element \fIname\fR. The tag is displayed
- only if an element \fIname\fR exists and is currently displayed (see
- \fBelement show\fR). If \fIname\fR is the empty
- string (the default), the tag is displayed.
- .TP
- \fB\-foreground \fIcolor\fR
- Sets the foreground color. The default foreground color is \fCblack\fR.
- .TP
- \fB\-linewidth \fIpixels\fR
- Sets the width of the lines.
- The default width is \fC0\fR.
- .TP
- \fB\-mapx \fItype\fR
- Specifies which x-axis to map the tag's x-coordinates onto.
- \fIType\fR must be either \fCx\fR, \fCx2\fR, or \fCboth\fR. The default
- axis is \fCx\fR.
- .TP
- \fB\-mapy \fItype\fR
- Specifies which y-axis to map the tag's y-coordinates onto.
- \fIType\fR must be either \fCy\fR, \fCy2\fR, or \fCboth\fR. The default
- axis is \fCy\fR.
- .TP
- \fB\-stipple \fIbitmap\fR
- Indicates that the line should be drawn with a stippled pattern rather
- than solid; \fIbitmap\fR specifies the stipple pattern to use, may be
- in any of the forms accepted by \fBTk_GetBitmap\fR. If \fIbitmap\fR is
- the empty string (the default) then the line is drawn in a solid fashion.
- .TP
- \fB\-xoffset \fIpixels\fR
- Specifies an offset in the x-coordinate direction
- (in window coordinates) from the specified position.
- The default offset is \fC0\fR.
- .TP
- \fB\-yoffset \fIpixels\fR
- Specifies an offset in the y-coordinate direction
- (in window coordinates) from the specified position.
- The default offset ifs \fC0\fR.
- .sp 1
- .SS "BITMAP TAGS"
- A bitmap tag displays a bitmap on the graph. Bitmap tags are
- created with widget commands in the form:
- .DS
- \fIpathName \fBtag create bitmap \fR?\fIcoords\fR? ?\fIoptions...\fR?
- .DE
- The argument \fIcoords\fR specifies a list containing the graph
- coordinates of a point used to position the bitmap on the display.
- After the coordinate list there may be any number of \fIoption\fR-\fIvalue\fR
- pairs, each of which sets one of the configuration options
- for the tag. These same \fIoption\fR\-\fIvalue\fR pairs may be
- used in the \fBtag configure\fR command to change the tag's
- configuration.
- The following options are supported for bitmap tags:
- .TP
- \fB\-anchor \fIanchorPos\fR
- \fIAnchorPos\fR tells how to position the bitmap relative to the
- positioning point for the bitmap; it may have any of the forms
- accepted by \fBTk_GetAnchor\fR. For example, if \fIanchorPos\fR
- is \fCcenter\fR then the bitmap is centered on the point; if
- \fIanchorPos\fR is \fCn\fR then the bitmap will be drawn such that
- the top center point of the rectangular region occupied by the
- bitmap will be at the positioning point.
- This option defaults to \fCcenter\fR.
- .TP
- \fB\-background \fIcolor\fR
- Sets the background color of the bitmap.
- If \fIcolor\fR is the empty string,
- the background color will be transparent.
- The default background color is \fCwhite\fR.
- .TP
- \fB\-foreground \fIcolor\fR
- Sets the foreground color of the bitmap.
- The default foreground color is \fCblack\fR.
- .TP
- \fB\-bitmap \fIbitmap\fR
- Specifies the bitmap to be displayed.
- \fIBitmap\fR may have any of the forms accepted by \fBTk_GetBitmap\fR.
- If \fIbitmap\fR is the empty string (the default), the tag will not be
- displayed.
- .TP
- \fB\-element \fIname\fR
- Associates the tag with the element \fIname\fR.
- If \fIname\fR is not the empty string (the default), the tag is displayed
- only if \fIname\fR exists and is being plotted
- (see \fBelement show\fR).
- .TP
- \fB\-mapx \fItype\fR
- Specifies which x-axis to map the tag's x-coordinates onto.
- \fIType\fR must be either \fCx\fR, \fCx2\fR, or \fCboth\fR. The default
- axis is \fCx\fR.
- .TP
- \fB\-mapy \fItype\fR
- Specifies which y-axis to map the tag's y-coordinates onto.
- \fIType\fR must be either \fCy\fR, \fCy2\fR, or \fCboth\fR. The default
- axis is \fCy\fR.
- .TP
- \fB\-rotate \fItheta\fR
- Sets the rotation of the bitmap.
- \fITheta\fR is a
- real number representing the angle of rotation in degrees.
- The tag is first rotated and then placed according to its anchor position.
- The default rotation is \fC0.0\fR.
- .TP
- \fB\-xoffset \fIpixels\fR
- Specifies an offset in the x-coordinate direction
- (in window coordinates) from the specified position.
- The default offset is \fC0\fR.
- .TP
- \fB\-yoffset \fIpixels\fR
- Specifies an offset in the y-coordinate direction
- (in window coordinates) from the specified position.
- The default offset is \fC0\fR.
- .sp 1
- .SS "POLYGON TAGS"
- A polygon tag displays a closed region described as two or more
- connected line segments on the graph.
- Polygon tags are created with the widget command:
- .DS
- \fIpathName \fBtag create polygon \fR?\fIcoords\fR? ?\fIoptions...\fR?
- .DE
- The argument \fIcoords\fR specifies a list of numeric
- expressions representing graph coordinates which
- describe the closed polygon.
- It is assumed the first and last points are connected.
- .P
- After the coordinate list there may be any number of \fIoption\fR-\fIvalue\fR
- pairs, each of which sets one of the configuration options
- for the tag. These same \fIoption\fR\-\fIvalue\fR pairs may be
- used in the \fBtag configure\fR command to change the tag's
- configuration.
- The following options are supported for polygon tags:
- .TP
- \fB\-background \fIcolor\fR
- Sets the background color of the polygon.
- The default background color is \fCwhite\fR.
- .TP
- \fB\-dashes \fIdashes\fR
- .VS
- Sets the dash style of the outline around the polygon. \fIDashes\fR
- is the number of alternatingly displayed pixels. If \fIdashes\fR is
- \fC0\fR (the default), the outline will be drawn as a solid line.
- .VE
- .TP
- \fB\-element \fIname\fR
- Associates the tag with the element \fIname\fR.
- If \fIname\fR is not the empty string (the default), the tag is displayed
- only if \fIname\fR exists and is currently being displayed
- (see \fBelement show\fR).
- .TP
- \fB\-foreground \fIcolor\fR
- Sets the foreground color of the polygon.
- The default foreground color is \fCblack\fR.
- .TP
- \fB\-linewidth \fIpixels\fR
- .VS
- Sets the width of the outline of the polygon. If \fIpixels\fR is zero,
- no outline
- is drawn. The default width is \fC0\fR.
- .VE
- .TP
- \fB\-mapx \fItype\fR
- Specifies which x-axis to map the tag's x-coordinates onto.
- \fIType\fR must be either \fCx\fR, \fCx2\fR, or \fCboth\fR. The default
- axis is \fCx\fR.
- .TP
- \fB\-mapy \fItype\fR
- Specifies which y-axis to map the tag's y-coordinates onto.
- \fIType\fR must be either \fCy\fR, \fCy2\fR, or \fCboth\fR. The default
- axis is \fCy\fR.
- .TP
- \fB\-stipple \fIbitmap\fR
- Indicates that the polygon should be drawn with a stippled pattern
- rather than a solid color;
- \fIbitmap\fR specifies the stipple pattern to use, in any of the
- forms accepted by \fBTk_GetBitmap\fR.
- If \fIbitmap\fR is the empty string (the default), then the polygon
- is filled with a solid (foreground) color.
- .TP
- \fB\-xoffset \fIpixels\fR
- Specifies an x-coordinate offset (in window coordinates)
- from the specified position.
- The default offset is \fC0\fR.
- .TP
- \fB\-yoffset \fIpixels\fR
- Specifies a y-coordinate offset (in window coordinates)
- from the specified position.
- The default is offset \fC0\fR.
- .sp 1
- .SS "WINDOW TAGS"
- A window tag displays a particular window at a given position on the graph.
- Window tags are created with the widget command:
- .DS
- \fIpathName \fBtag create window \fR?\fIcoords\fR? ?\fIoptions...\fR?
- .DE
- The argument \fIcoords\fR specifies a list containing the graph
- coordinates of a point used to position the window on the display
- After \fIcoords\fR, there may be any number of \fIoption\fR-\fIvalue\fR
- pairs, each of which sets one of the configuration options
- for the tag. These same \fIoption\fR\-\fIvalue\fR pairs may be
- used in the \fBtag configure\fR command to change the tag's
- configuration.
- The following options are supported for window tags:
- .TP
- \fB\-anchor \fIanchorPos\fR
- \fIAnchorPos\fR tells how to position the window relative to the
- positioning point for the window; it may have any of the forms
- accepted by \fBTk_GetAnchor\fR. For example, if \fIanchorPos\fR
- is \fCcenter\fR then the window is centered on the point; if
- \fIanchorPos\fR is \fCn\fR then the window will be displayed such that
- the top center point of the rectangular region occupied by the
- window will be at the positioning point.
- This option defaults to \fCcenter\fR.
- .TP
- \fB\-element \fIname\fR
- Associates the tag with the element \fIname\fR.
- If \fIname\fR is not the empty string, the tag is displayed
- only if \fIname\fR exists and is currently being displayed
- (see \fBelement show\fR).
- This option defaults to the empty string.
- .TP
- \fB\-height \fIpixels\fR
- Specifies the height to assign to the tag's window.
- If this option isn't specified, or if it is specified as the empty
- string, then the window is given whatever height it requests internally.
- .TP
- \fB\-mapx \fItype\fR
- Specifies which x-axis to map the tag's x-coordinates onto.
- \fIType\fR must be either \fCx\fR, \fCx2\fR, or \fCboth\fR. The default
- axis is \fCx\fR.
- .TP
- \fB\-mapy \fItype\fR
- Specifies which y-axis to map the tag's y-coordinates onto.
- \fIType\fR must be either \fCy\fR, \fCy2\fR, or \fCboth\fR. The default
- axis is \fCy\fR.
- .TP
- \fB\-width \fIpixels\fR
- Specifies the width to assign to the tag's window.
- If this option isn't specified, or if it is specified as the empty
- string, then the window is given whatever width it requests internally.
- .TP
- \fB\-window \fIpathName\fR
- Specifies the window to be managed by the graph.
- The window specified by \fIpathName\fR must be a child of
- the \fBblt_graph\fR widget.
- .TP
- \fB\-xoffset \fIpixels\fR
- Specifies an x-coordinate offset (in window coordinates)
- from the specified position.
- The default offset is \fC0\fR.
- .TP
- \fB\-yoffset \fIpixels\fR
- Specifies a y-coordinate offset (in window coordinates)
- from the specified position.
- The default offset is \fC0\fR.
- .sp 1
- .SS "POSTSCRIPT OPTIONS"
- The following options are valid for configuring PostScript output using either
- the \fBpostscript\fR or the \fBpsconfigure\fR command.
- .DS
- \fIpathName \fBpostscript \fR?\fIfileName\fR? \fIoptions...\fR?
-
- \fIpathName \fBpsconfigure ?\fIoptions...\fR?
- .DE
- .TP
- \fB\-colormap \fIvarName\fR
- \fIVarName\fR must be the name of a global array variable
- that specifies a color mapping from the X color name to PostScript.
- Each element of \fIvarName\fR must consist of PostScript
- code to set a particular color value (e.g. ``\fC1.0 1.0 0.0 setrgbcolor\fR'').
- When outputting color information in PostScript, it checks
- to see if there is an element of \fIvarName\fR with the same
- name as the color. If so, it uses the value of the element as the
- PostScript command to set the color.
- If this option hasn't been specified, or if there isn't an entry
- in \fIvarName\fR for a given color, then it uses the red, green,
- and blue intensities from the X color.
- .TP
- \fB\-colormode \fImode\fR
- Specifies how to output color information. \fIMode\fR must be either
- \fBcolor\fR (for full color output), \fCgray\fR (convert all colors
- to their gray-scale equivalents) or \fCmono\fR (convert foreground colors
- to black and background colors to white). The default mode is \fCcolor\fR.
- .TP
- \fB\-fontmap \fIvarName\fR
- \fIVarName\fR must be the name of a global array variable
- that specifies a font mapping from the X font name to PostScript.
- Each element of \fIvarName\fR must consist of a Tcl list with
- one or two elements, which are the name and point size of a PostScript font.
- When outputting PostScript commands for a particular font, Tk
- checks to see if \fIvarName\fR contains an element with the same
- name as the specified font.
- If there is such an element, then the font information contained in
- that element is used in the PostScript output. (If the point size
- is omitted from the list, the point size of the X font is used).
- Otherwise the X font is examined in an attempt to guess what PostScript
- font to use. This works only for fonts whose foundry property is
- \fIAdobe\fR (such as Times, Helvetica, Courier, etc.). If all of
- this fails then the font defaults to \fCHelvetica-Bold\fR.
- .TP
- \fB\-landscape \fIboolean\fR
- If \fIboolean\fR is \fCtrue\fR, this specifies the printed area is to
- be rotated 90 degrees.
- In non-rotated output the \f(BIx\fR axis of the printed area runs along
- the short dimension of the page (``portrait'' orientation);
- in rotated output the \f(BIx\fR axis runs along the long dimension of the
- page (``landscape'' orientation).
- Defaults to \fCfalse\fR.
- .TP
- \fB\-pageanchor \fIanchor\fR
- Specifies which point of the printed area should be appear over
- the positioning point on the page (which is given by the \fB\-pagex\fR
- and \fB\-pagey\fR options).
- For example, \fB\-pageanchor n\fR means that the top center of the
- printed area should be over the positioning point.
- Defaults to \fCnw\fR.
- .TP
- \fB\-pageheight \fIsize\fR
- Specifies that the height of the graph drawn in PostScript.
- The graph is \fInot\fR uniformly scaled since this also scales
- the fonts. \fISize\fR may be any value accepted by \fBTk_GetPixels\fR.
- The resulting pixel value is then converted to postscript printer
- points. This means that a height \fI8i\fR will be properly
- converted to 8 inches. This options defaults to the height of the graph window.
- .TP
- \fB\-pagewidth \fIsize\fR
- Specifies that the width of the graph drawn in PostScript.
- The graph is \fInot\fR uniformly scaled since this also scales
- the fonts. \fISize\fR may be any value accepted by \fBTk_GetPixels\fR.
- The resulting pixel value is then converted to postscript printer
- points. This means that a width \fI6.5i\fR will be properly
- converted to 6.5 inches. This options defaults to the width of the graph window.
- .TP
- \fB\-pagex \fIposition\fR
- Specifies the x-coordinate of the page positioning point.
- This (with the \fB-pageanchor\fR option) indicates
- where the graph is placed on the PostScript page.
- \fIPosition\fR may be any value accepted by
- \fBTk_GetPixels\fR. The resulting pixel value is then converted to
- postscript printer points. The default is \fC1i\fR.
- .TP
- \fB\-pagey \fIposition\fR
- Specifies the y-coordinate of the page positioning point.
- This (with the \fB-pageanchor\fR option) indicates
- where the graph is placed on the PostScript page.
- \fIPosition\fR may be any value accepted by
- \fBTk_GetPixels\fR. The resulting pixel value is then converted to
- postscript printer points. The default is \fC1i\fR.
- .SH "SETTING DATA FROM C"
- The data points of any element can be reset from a C routine using
- the convenience function \fBBlt_GraphElement\fR. This can be useful
- in situations where it is too expensive to translate the data values
- from string representations. Another possible use could be to read in
- special data file formats.
- .sp 1
- .nf
- \fCint Blt_GraphElement(interp, pathName, elemName, numValues, valueArr)
- Tcl_Interp *interp; /* Interpreter of the graph widget */
- char *pathName; /* Path name of the graph widget */
- char *elemName; /* Name of the element to reset */
- int numValues; /* Number of values in array */
- double *valueArr; /* Array of x,y coordinate pairs */
- \fR
- .fi
- The interpreter must be the same as the one containing the graph
- widget and both the graph and the element specified must
- already exist.
- The data array must contain pairs of x,y coordinates. The number
- specified is the total number values in this array. The data values
- in the array are copied into the graph widget for that element.
- You don't need to worry about allocating space for them.
- .PP
- \fBBlt_GraphElement\fR will return TCL_OK if successful.
- The graph will be redrawn with the new data points at the next idle point.
- Otherwise it returns TCL_ERROR and "\fCinterp->result\fR"
- will contain an error message.
- .SH BINDINGS
- There are no default bindings.
- .SH BUGS
- Auto-scale routines do not use requested min/max limits
- as boundaries when the axis is logarithmically scaled.
- .PP
- The needs to be a special mapping for undefined log scale values (>= 0.0).
- Possibly set up a "red zone" of undefined values which divides the
- positive and negative values.
- .PP
- The PostScript output generated for polygons with more than 1500 points
- may exceed the limits of some printers (See PostScript Language Reference
- Manual, page 568). The work-around is to break the polygon into
- separate pieces.
- .SH KEYWORDS
- graph, widget
-