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canvasprintbox - Create and manipulate a canvas print box widget

Synopsis

canvasprintbox pathName ?options?

Inheritance

itk::Widget <- Canvasprintbox

Standard Options

activeBackground
background borderWidthcursor foreground highlightBackground highlightColorhighlightThickness
insertBackground
insertBorderWidthinsertOffTimeinsertOnTime insertWidth relief repeatDelay repeatInterval
selectBackground
selectBorderWidthselectForeground

See the «options» manual entry for details on the standard

options.

Associated Options

Widget-specific Options

Name: filename

Class: FileName

Command-Line Switch: -filename

The file to write the postscript output to (Only when output is

set to «file"). If posterizing is turned on and hpagecnt and/or vpagecnt is more than 1, x.y is appended to the filename where x is the horizontal page number and y the vertical page number.

Name: hpagecnt

Class: PageCnt

Command-Line Switch: -hpagecnt

Is used in combination with posterize to determine over how many

pages the output should be distributed. This attribute specifies how many pages should be used horizontaly. Any change to this attribute will automatically update the «stamp". Defaults to 1.

Name: orient

Class: Orient

Command-Line Switch: -orient

Determines the orientation of the output to the printer (or

file). It can take the value «portrait» or «landscape" (default). Changes to this attribute will be reflected immedi- ately in the «stamp". Defaults to «landscape» but will be changed automaticaly to the value deemed appropiate for the cur- rent canvas. Setting this attribute when the canvasprintbox is first constructed (instead of using the «configure» method) will turn off the auto adjustment of this attribute.

Name: output

Class: Output

Command-Line Switch: -output

Specifies where the postscript output should go: to the printer

or to a file. Can take on the values «printer» or «file". The corresponding entry-widget will reflect the contents of either the printcmd attribute or the filename attribute. Defaults to «printer".

Name: pageSize

Class: PageSize

Command-Line Switch: -pagesize

The pagesize the printer supports. Changes to this attribute will

be reflected immediately in the «stamp". Defaults to «a4".

Name: posterize

Class: Posterize

Command-Line Switch: -posterize

Indicates if posterizing is turned on or not. Posterizing the

output means that it is possible to distribute the output over more than one page. This way it is possible to print a can- vas/region which is larger than the specified pagesize without stretching. If used in combination with stretching it can be used to «blow up» the contents of a canvas to as large as size as you want (See attributes: hpagecnt and vpagecnt). Any change to this attribute will automatically update the «stamp". Defaults to 0.

Name: printCmd

Class: PrintCmd

Command-Line Switch: -printcmd

The command to execute when printing the postscript output. The

command will get the postscript directed to its standard input (Only when output is set to «printer"). Defaults to «lpr".

Name: printRegion

Class: PrintRegion

Command-Line Switch: -printregion

A list of four coordinates specifying which part of the canvas to

print. An empty list means that the canvas' entire scrollregion should be printed. Any change to this attribute will automati- cally update the «stamp". Defaults to an empty list.

Name: stretch

Class: Stretch

Command-Line Switch: -stretch

Determines if the output should be stretched to fill the page (as

defined by the attribute pagesize) as large as possible. The aspect-ratio of the output will be retained and the output will never fall outside of the boundaries of the page. Defaults to 0 but will be changed automaticaly to the value deemed appropiate for the current canvas. Setting this attribute when the can- vasprintbox is first constructed (instead of using the «config- ure» method) will turn off the auto adjustment of this attribute.

Name: vPageCnt

Class: PageCnt

Command-Line Switch: -vpagecnt

Is used in combination with «posterize» to determine over how

many pages the output should be distributed. This attribute spec- ifies how many pages should be used verticaly. Any change to this attribute will automatically update the «stamp". Defaults to 1.
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Description

Implements a print box for printing the contents of a canvas wid-

get to a printer or a file. It is possible to specify page orien- tation, the number of pages to print the image on and if the out- put should be stretched to fit the page. Options exist to control the appearance and actions of the widget.

Methods

The canvasprintbox command creates a new Tcl command whose name

is pathName. This command may be used to invoke various opera- tions on the widget. It has the following general form:

pathName option ?arg arg ...?

Option and the args determine the exact behavior of the command.

The following commands are possible for canvasprintbox widgets:

Widget-specific Methods

pathName cget option

Returns the current value of the configuration option given by

option. Option may have any of the values accepted by the can- vasprintbox command.
pathName configure ?option? ?value option value ...?

Query or modify the configuration options of the widget. If no

option is specified, returns a list describing all of the avail- able options for pathName (see Tk_ConfigureInfo for information on the format of this list). If option is specified with no value, 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 option is specified). If one or more option-value pairs are specified, then the command modifies the given widget option(s) to have the given value(s); in this case the command returns an empty string. Option may have any of the values accepted by the canvasprintbox command. pathName getoutput

Returns the value of the printercmd or filename option depending

on the current setting of output.
pathName print

Perfrom the actual printing of the canvas using the current set-

tings of all the attributes. Returns a boolean indicating wether the printing was successful or not.
pathName refresh

Retrieves the current value for all edit fields and updates the

stamp accordingly. Is useful for Apply-buttons. pathName setcanvas canvas

This is used to set the canvas that has to be printed. A stamp-

sized copy will automatically be drawn to show how the output would look with the current settings.
pathName stop

Stops the drawing of the «stamp". I'm currently unable to detect

when a Canvasprintbox gets destroyed or withdrawn. It's therefore advised that you perform a stop before you do something like that.

Components

Name: prtflentry

Class: Entry

The prtflentry component is the entry field for user input of the

filename or printer command (depending on the value of output).

Name: hpcnt

Class: Entry

The hpcnt component is the entry field for user input of the num-

ber of pages to use horizontaly when posterize is turned on.

Name: vpcnt

Class: Entry

The vpcnt component is the entry field for user input of the num-

ber of pages to use verticaly when posterize is turned on.

Example

canvasprintbox .fsb -orient landscape -stretch 1 pack .fsb -padx 10 -pady 10 -fill both -expand yes

Author

Tako Schotanus

Tako.Schotanus@bouw.tno.nl

Keywords

canvasprintbox, widget

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