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#
# Scrolledcanvas
# ----------------------------------------------------------------------
# Implements horizontal and vertical scrollbars around a canvas childsite
# Includes options to control display of scrollbars. The standard
# canvas options and methods are supported.
#
# ----------------------------------------------------------------------
# AUTHOR: Mark Ulferts mulferts@austin.dsccc.com
#
# @(#) $Id: scrolledcanvas.itk,v 1.3 2001/08/17 19:04:06 smithc Exp $
# ----------------------------------------------------------------------
# Copyright (c) 1995 DSC Technologies Corporation
# ======================================================================
# Permission to use, copy, modify, distribute and license this software
# and its documentation for any purpose, and without fee or written
# agreement with DSC, is hereby granted, provided that the above copyright
# notice appears in all copies and that both the copyright notice and
# warranty disclaimer below appear in supporting documentation, and that
# the names of DSC Technologies Corporation or DSC Communications
# Corporation not be used in advertising or publicity pertaining to the
# software without specific, written prior permission.
#
# DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
# INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
# AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL
# DSC 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.
# ======================================================================
#
# Usual options.
#
itk::usual Scrolledcanvas {
keep -activebackground -activerelief -background -borderwidth -cursor \
-elementborderwidth -foreground -highlightcolor -highlightthickness \
-insertbackground -insertborderwidth -insertofftime -insertontime \
-insertwidth -jump -labelfont -selectbackground -selectborderwidth \
-selectforeground -textbackground -troughcolor
}
# ------------------------------------------------------------------
# SCROLLEDCANVAS
# ------------------------------------------------------------------
itcl::class iwidgets::Scrolledcanvas {
inherit iwidgets::Scrolledwidget
constructor {args} {}
destructor {}
itk_option define -autoresize autoResize AutoResize 1
itk_option define -automargin autoMargin AutoMargin 0
public method childsite {}
public method justify {direction}
public method addtag {args}
public method bbox {args}
public method bind {args}
public method canvasx {args}
public method canvasy {args}
public method coords {args}
public method create {args}
public method dchars {args}
public method delete {args}
public method dtag {args}
public method find {args}
public method focus {args}
public method gettags {args}
public method icursor {args}
public method index {args}
public method insert {args}
public method itemconfigure {args}
public method itemcget {args}
public method lower {args}
public method move {args}
public method postscript {args}
public method raise {args}
public method scale {args}
public method scan {args}
public method select {args}
public method type {args}
public method xview {args}
public method yview {args}
}
#
# Provide a lowercased access method for the Scrolledcanvas class.
#
proc ::iwidgets::scrolledcanvas {pathName args} {
uplevel ::iwidgets::Scrolledcanvas $pathName $args
}
#
# Use option database to override default resources of base classes.
#
option add *Scrolledcanvas.width 200 widgetDefault
option add *Scrolledcanvas.height 230 widgetDefault
option add *Scrolledcanvas.labelPos n widgetDefault
# ------------------------------------------------------------------
# CONSTRUCTOR
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::constructor {args} {
#
# Create a clipping frame which will provide the border for
# relief display.
#
itk_component add clipper {
frame $itk_interior.clipper
} {
usual
keep -borderwidth -relief -highlightthickness -highlightcolor
rename -highlightbackground -background background Background
}
grid $itk_component(clipper) -row 0 -column 0 -sticky nsew
grid rowconfigure $_interior 0 -weight 1
grid columnconfigure $_interior 0 -weight 1
#
# Create a canvas to scroll
#
itk_component add canvas {
canvas $itk_component(clipper).canvas \
-height 1.0 -width 1.0 \
-scrollregion "0 0 1 1" \
-xscrollcommand \
[itcl::code $this _scrollWidget $itk_interior.horizsb] \
-yscrollcommand \
[itcl::code $this _scrollWidget $itk_interior.vertsb]
} {
usual
ignore -highlightthickness -highlightcolor
keep -closeenough -confine -scrollregion
keep -xscrollincrement -yscrollincrement
rename -background -textbackground textBackground Background
}
grid $itk_component(canvas) -row 0 -column 0 -sticky nsew
grid rowconfigure $itk_component(clipper) 0 -weight 1
grid columnconfigure $itk_component(clipper) 0 -weight 1
#
# Configure the command on the vertical scroll bar in the base class.
#
$itk_component(vertsb) configure \
-command [itcl::code $itk_component(canvas) yview]
#
# Configure the command on the horizontal scroll bar in the base class.
#
$itk_component(horizsb) configure \
-command [itcl::code $itk_component(canvas) xview]
#
# Initialize the widget based on the command line options.
#
eval itk_initialize $args
}
# ------------------------------------------------------------------
# DESTURCTOR
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::destructor {} {
}
# ------------------------------------------------------------------
# OPTIONS
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# OPTION: -autoresize
#
# Automatically adjusts the scrolled region to be the bounding
# box covering all the items in the canvas following the execution
# of any method which creates or destroys items. Thus, as new
# items are added, the scrollbars adjust accordingly.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Scrolledcanvas::autoresize {
if {$itk_option(-autoresize)} {
set bbox [$itk_component(canvas) bbox all]
if {$bbox != {}} {
set marg $itk_option(-automargin)
set bbox [lreplace $bbox 0 0 [expr {[lindex $bbox 0] - $marg}]]
set bbox [lreplace $bbox 1 1 [expr {[lindex $bbox 1] - $marg}]]
set bbox [lreplace $bbox 2 2 [expr {[lindex $bbox 2] + $marg}]]
set bbox [lreplace $bbox 3 3 [expr {[lindex $bbox 3] + $marg}]]
}
$itk_component(canvas) configure -scrollregion $bbox
}
}
# ------------------------------------------------------------------
# METHODS
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# METHOD: childsite
#
# Returns the path name of the child site widget.
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::childsite {} {
return $itk_component(canvas)
}
# ------------------------------------------------------------------
# METHOD: justify
#
# Justifies the canvas scrolled region in one of four directions: top,
# bottom, left, or right.
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::justify {direction} {
if {[winfo ismapped $itk_component(canvas)]} {
update idletasks
switch $direction {
left {
$itk_component(canvas) xview moveto 0
}
right {
$itk_component(canvas) xview moveto 1
}
top {
$itk_component(canvas) yview moveto 0
}
bottom {
$itk_component(canvas) yview moveto 1
}
default {
error "bad justify argument \"$direction\": should be\
left, right, top, or bottom"
}
}
}
}
# ------------------------------------------------------------------
# CANVAS METHODS:
#
# The following methods are thin wraps of standard canvas methods.
# Consult the Tk canvas man pages for functionallity and argument
# documentation
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# METHOD: addtag tag searchSpec ?arg arg ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::addtag {args} {
return [eval $itk_component(canvas) addtag $args]
}
# ------------------------------------------------------------------
# METHOD: bbox tagOrId ?tagOrId tagOrId ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::bbox {args} {
return [eval $itk_component(canvas) bbox $args]
}
# ------------------------------------------------------------------
# METHOD: bind tagOrId ?sequence? ?command?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::bind {args} {
return [eval $itk_component(canvas) bind $args]
}
# ------------------------------------------------------------------
# METHOD: canvasx screenx ?gridspacing?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::canvasx {args} {
return [eval $itk_component(canvas) canvasx $args]
}
# ------------------------------------------------------------------
# METHOD: canvasy screeny ?gridspacing?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::canvasy {args} {
return [eval $itk_component(canvas) canvasy $args]
}
# ------------------------------------------------------------------
# METHOD: coords tagOrId ?x0 y0 ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::coords {args} {
return [eval $itk_component(canvas) coords $args]
}
# ------------------------------------------------------------------
# METHOD: create type x y ?x y ...? ?option value ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::create {args} {
set retval [eval $itk_component(canvas) create $args]
configure -autoresize $itk_option(-autoresize)
return $retval
}
# ------------------------------------------------------------------
# METHOD: dchars tagOrId first ?last?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::dchars {args} {
return [eval $itk_component(canvas) dchars $args]
}
# ------------------------------------------------------------------
# METHOD: delete tagOrId ?tagOrId tagOrId ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::delete {args} {
set retval [eval $itk_component(canvas) delete $args]
configure -autoresize $itk_option(-autoresize)
return $retval
}
# ------------------------------------------------------------------
# METHOD: dtag tagOrId ?tagToDelete?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::dtag {args} {
eval $itk_component(canvas) dtag $args
configure -autoresize $itk_option(-autoresize)
}
# ------------------------------------------------------------------
# METHOD: find searchCommand ?arg arg ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::find {args} {
return [eval $itk_component(canvas) find $args]
}
# ------------------------------------------------------------------
# METHOD: focus ?tagOrId?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::focus {args} {
return [eval $itk_component(canvas) focus $args]
}
# ------------------------------------------------------------------
# METHOD: gettags tagOrId
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::gettags {args} {
return [eval $itk_component(canvas) gettags $args]
}
# ------------------------------------------------------------------
# METHOD: icursor tagOrId index
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::icursor {args} {
eval $itk_component(canvas) icursor $args
}
# ------------------------------------------------------------------
# METHOD: index tagOrId index
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::index {args} {
return [eval $itk_component(canvas) index $args]
}
# ------------------------------------------------------------------
# METHOD: insert tagOrId beforeThis string
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::insert {args} {
eval $itk_component(canvas) insert $args
}
# ------------------------------------------------------------------
# METHOD: itemconfigure tagOrId ?option? ?value? ?option value ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::itemconfigure {args} {
set retval [eval $itk_component(canvas) itemconfigure $args]
configure -autoresize $itk_option(-autoresize)
return $retval
}
# ------------------------------------------------------------------
# METHOD: itemcget tagOrId ?option?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::itemcget {args} {
set retval [eval $itk_component(canvas) itemcget $args]
return $retval
}
# ------------------------------------------------------------------
# METHOD: lower tagOrId ?belowThis?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::lower {args} {
eval $itk_component(canvas) lower $args
}
# ------------------------------------------------------------------
# METHOD: move tagOrId xAmount yAmount
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::move {args} {
eval $itk_component(canvas) move $args
configure -autoresize $itk_option(-autoresize)
}
# ------------------------------------------------------------------
# METHOD: postscript ?option value ...?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::postscript {args} {
#
# Make sure the fontmap is in scope.
#
set fontmap ""
regexp -- {-fontmap +([^ ]+)} $args all fontmap
if {$fontmap != ""} {
global $fontmap
}
return [eval $itk_component(canvas) postscript $args]
}
# ------------------------------------------------------------------
# METHOD: raise tagOrId ?aboveThis?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::raise {args} {
eval $itk_component(canvas) raise $args
}
# ------------------------------------------------------------------
# METHOD: scale tagOrId xOrigin yOrigin xScale yScale
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::scale {args} {
eval $itk_component(canvas) scale $args
}
# ------------------------------------------------------------------
# METHOD: scan option args
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::scan {args} {
eval $itk_component(canvas) scan $args
}
# ------------------------------------------------------------------
# METHOD: select option ?tagOrId arg?
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::select {args} {
eval $itk_component(canvas) select $args
}
# ------------------------------------------------------------------
# METHOD: type tagOrId
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::type {args} {
return [eval $itk_component(canvas) type $args]
}
# ------------------------------------------------------------------
# METHOD: xview index
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::xview {args} {
eval $itk_component(canvas) xview $args
}
# ------------------------------------------------------------------
# METHOD: yview index
# ------------------------------------------------------------------
itcl::body iwidgets::Scrolledcanvas::yview {args} {
eval $itk_component(canvas) yview $args
}