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446 lines
14 KiB
Plaintext
446 lines
14 KiB
Plaintext
15 years ago
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#
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# Labeledwidget
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# ----------------------------------------------------------------------
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# Implements a labeled widget which contains a label and child site.
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# The child site is a frame which can filled with any widget via a
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# derived class or though the use of the childsite method. This class
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# was designed to be a general purpose base class for supporting the
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# combination of label widget and a childsite, where a label may be
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# text, bitmap or image. The options include the ability to position
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# the label around the childsite widget, modify the font and margin,
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# and control the display of the label.
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#
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# ----------------------------------------------------------------------
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# AUTHOR: Mark L. Ulferts EMAIL: mulferts@austin.dsccc.com
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#
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# @(#) $Id: labeledwidget.itk,v 1.4 2001/08/20 20:02:53 smithc Exp $
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# ----------------------------------------------------------------------
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# Copyright (c) 1995 DSC Technologies Corporation
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# ======================================================================
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# Permission to use, copy, modify, distribute and license this software
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# and its documentation for any purpose, and without fee or written
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# agreement with DSC, is hereby granted, provided that the above copyright
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# notice appears in all copies and that both the copyright notice and
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# warranty disclaimer below appear in supporting documentation, and that
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# the names of DSC Technologies Corporation or DSC Communications
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# Corporation not be used in advertising or publicity pertaining to the
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# software without specific, written prior permission.
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#
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# DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
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# INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
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# AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE,
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# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL
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# DSC BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION,
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# ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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# SOFTWARE.
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# ======================================================================
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#
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# Usual options.
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#
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itk::usual Labeledwidget {
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keep -background -cursor -foreground -labelfont
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}
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# ------------------------------------------------------------------
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# LABELEDWIDGET
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# ------------------------------------------------------------------
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itcl::class iwidgets::Labeledwidget {
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inherit itk::Widget
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constructor {args} {}
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destructor {}
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itk_option define -disabledforeground disabledForeground \
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DisabledForeground \#a3a3a3
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itk_option define -labelpos labelPos Position w
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itk_option define -labelmargin labelMargin Margin 2
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itk_option define -labeltext labelText Text {}
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itk_option define -labelvariable labelVariable Variable {}
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itk_option define -labelbitmap labelBitmap Bitmap {}
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itk_option define -labelimage labelImage Image {}
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itk_option define -state state State normal
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itk_option define -sticky sticky Sticky nsew
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public method childsite
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private method _positionLabel {{when later}}
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proc alignlabels {args} {}
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protected variable _reposition "" ;# non-null => _positionLabel pending
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}
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#
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# Provide a lowercased access method for the Labeledwidget class.
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#
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proc ::iwidgets::labeledwidget {pathName args} {
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uplevel ::iwidgets::Labeledwidget $pathName $args
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}
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# ------------------------------------------------------------------
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# CONSTRUCTOR
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# ------------------------------------------------------------------
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itcl::body iwidgets::Labeledwidget::constructor {args} {
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#
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# Create a frame for the childsite widget.
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#
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itk_component add -protected lwchildsite {
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frame $itk_interior.lwchildsite
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}
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#
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# Create label.
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#
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itk_component add label {
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label $itk_interior.label
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} {
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usual
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rename -font -labelfont labelFont Font
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ignore -highlightcolor -highlightthickness
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}
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#
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# Set the interior to be the childsite for derived classes.
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#
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set itk_interior $itk_component(lwchildsite)
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#
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# Initialize the widget based on the command line options.
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#
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eval itk_initialize $args
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#
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# When idle, position the label.
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#
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_positionLabel
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}
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# ------------------------------------------------------------------
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# DESTRUCTOR
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# ------------------------------------------------------------------
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itcl::body iwidgets::Labeledwidget::destructor {} {
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if {$_reposition != ""} {after cancel $_reposition}
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}
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# ------------------------------------------------------------------
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# OPTIONS
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# ------------------------------------------------------------------
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# ------------------------------------------------------------------
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# OPTION: -disabledforeground
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#
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# Specified the foreground to be used on the label when disabled.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::disabledforeground {}
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# ------------------------------------------------------------------
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# OPTION: -labelpos
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#
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# Set the position of the label on the labeled widget. The margin
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# between the label and childsite comes along for the ride.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::labelpos {
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_positionLabel
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}
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# ------------------------------------------------------------------
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# OPTION: -labelmargin
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#
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# Specifies the distance between the widget and label.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::labelmargin {
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_positionLabel
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}
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# ------------------------------------------------------------------
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# OPTION: -labeltext
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#
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# Specifies the label text.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::labeltext {
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$itk_component(label) configure -text $itk_option(-labeltext)
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_positionLabel
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}
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# ------------------------------------------------------------------
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# OPTION: -labelvariable
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#
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# Specifies the label text variable.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::labelvariable {
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$itk_component(label) configure -textvariable $itk_option(-labelvariable)
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_positionLabel
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}
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# ------------------------------------------------------------------
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# OPTION: -labelbitmap
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#
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# Specifies the label bitmap.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::labelbitmap {
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$itk_component(label) configure -bitmap $itk_option(-labelbitmap)
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_positionLabel
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}
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# ------------------------------------------------------------------
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# OPTION: -labelimage
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#
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# Specifies the label image.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::labelimage {
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$itk_component(label) configure -image $itk_option(-labelimage)
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_positionLabel
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}
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# ------------------------------------------------------------------
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# OPTION: -sticky
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#
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# Specifies the stickyness of the child site. This option was added
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# by James Bonfield (committed by Chad Smith 8/20/01).
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::sticky {
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grid $itk_component(lwchildsite) -sticky $itk_option(-sticky)
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}
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# ------------------------------------------------------------------
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# OPTION: -state
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#
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# Specifies the state of the label.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Labeledwidget::state {
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_positionLabel
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}
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# ------------------------------------------------------------------
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# METHODS
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# ------------------------------------------------------------------
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# ------------------------------------------------------------------
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# METHOD: childsite
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#
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# Returns the path name of the child site widget.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Labeledwidget::childsite {} {
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return $itk_component(lwchildsite)
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}
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# ------------------------------------------------------------------
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# PROCEDURE: alignlabels widget ?widget ...?
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#
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# The alignlabels procedure takes a list of widgets derived from
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# the Labeledwidget class and adjusts the label margin to align
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# the labels.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Labeledwidget::alignlabels {args} {
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update
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set maxLabelWidth 0
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#
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# Verify that all the widgets are of type Labeledwidget and
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# determine the size of the maximum length label string.
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#
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foreach iwid $args {
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set objcmd [itcl::find objects -isa Labeledwidget *::$iwid]
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if {$objcmd == ""} {
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error "$iwid is not a \"Labeledwidget\""
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}
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set csWidth [winfo reqwidth $iwid.lwchildsite]
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set shellWidth [winfo reqwidth $iwid]
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if {($shellWidth - $csWidth) > $maxLabelWidth} {
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set maxLabelWidth [expr {$shellWidth - $csWidth}]
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}
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}
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#
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# Adjust the margins for the labels such that the child sites and
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# labels line up.
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#
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foreach iwid $args {
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set csWidth [winfo reqwidth $iwid.lwchildsite]
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set shellWidth [winfo reqwidth $iwid]
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set labelSize [expr {$shellWidth - $csWidth}]
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if {$maxLabelWidth > $labelSize} {
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set objcmd [itcl::find objects -isa Labeledwidget *::$iwid]
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set dist [expr {$maxLabelWidth - \
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($labelSize - [$objcmd cget -labelmargin])}]
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$objcmd configure -labelmargin $dist
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}
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}
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}
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# ------------------------------------------------------------------
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# PROTECTED METHOD: _positionLabel ?when?
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#
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# Packs the label and label margin. If "when" is "now", the
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# change is applied immediately. If it is "later" or it is not
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# specified, then the change is applied later, when the application
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# is idle.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Labeledwidget::_positionLabel {{when later}} {
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if {$when == "later"} {
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if {$_reposition == ""} {
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set _reposition [after idle [itcl::code $this _positionLabel now]]
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}
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return
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} elseif {$when != "now"} {
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error "bad option \"$when\": should be now or later"
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}
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#
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# If we have a label, be it text, bitmap, or image continue.
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#
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if {($itk_option(-labeltext) != {}) || \
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($itk_option(-labelbitmap) != {}) || \
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($itk_option(-labelimage) != {}) || \
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($itk_option(-labelvariable) != {})} {
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#
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# Set the foreground color based on the state.
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#
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if {[info exists itk_option(-state)]} {
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switch -- $itk_option(-state) {
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disabled {
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$itk_component(label) configure \
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-foreground $itk_option(-disabledforeground)
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}
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normal {
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$itk_component(label) configure \
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-foreground $itk_option(-foreground)
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}
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}
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}
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set parent [winfo parent $itk_component(lwchildsite)]
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#
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# Switch on the label position option. Using the grid,
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# adjust the row/column setting of the label, margin, and
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# and childsite. The margin height/width is adjust based
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# on the orientation as well. Finally, set the weights such
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# that the childsite takes the heat on expansion and shrinkage.
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#
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switch $itk_option(-labelpos) {
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nw -
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n -
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ne {
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grid $itk_component(label) -row 0 -column 0 \
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-sticky $itk_option(-labelpos)
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grid $itk_component(lwchildsite) -row 2 -column 0 \
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-sticky $itk_option(-sticky)
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grid rowconfigure $parent 0 -weight 0 -minsize 0
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grid rowconfigure $parent 1 -weight 0 -minsize \
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[winfo pixels $itk_component(label) \
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$itk_option(-labelmargin)]
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grid rowconfigure $parent 2 -weight 1 -minsize 0
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grid columnconfigure $parent 0 -weight 1 -minsize 0
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grid columnconfigure $parent 1 -weight 0 -minsize 0
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grid columnconfigure $parent 2 -weight 0 -minsize 0
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}
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en -
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e -
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es {
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grid $itk_component(lwchildsite) -row 0 -column 0 \
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-sticky $itk_option(-sticky)
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grid $itk_component(label) -row 0 -column 2 \
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-sticky $itk_option(-labelpos)
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grid rowconfigure $parent 0 -weight 1 -minsize 0
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grid rowconfigure $parent 1 -weight 0 -minsize 0
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grid rowconfigure $parent 2 -weight 0 -minsize 0
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grid columnconfigure $parent 0 -weight 1 -minsize 0
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grid columnconfigure $parent 1 -weight 0 -minsize \
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[winfo pixels $itk_component(label) \
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$itk_option(-labelmargin)]
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grid columnconfigure $parent 2 -weight 0 -minsize 0
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}
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se -
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s -
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sw {
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grid $itk_component(lwchildsite) -row 0 -column 0 \
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-sticky $itk_option(-sticky)
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grid $itk_component(label) -row 2 -column 0 \
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-sticky $itk_option(-labelpos)
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grid rowconfigure $parent 0 -weight 1 -minsize 0
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grid rowconfigure $parent 1 -weight 0 -minsize \
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[winfo pixels $itk_component(label) \
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$itk_option(-labelmargin)]
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grid rowconfigure $parent 2 -weight 0 -minsize 0
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|
|
grid columnconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
grid columnconfigure $parent 2 -weight 0 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
wn -
|
||
|
|
w -
|
||
|
|
ws {
|
||
|
|
grid $itk_component(lwchildsite) -row 0 -column 2 \
|
||
|
|
-sticky $itk_option(-sticky)
|
||
|
|
grid $itk_component(label) -row 0 -column 0 \
|
||
|
|
-sticky $itk_option(-labelpos)
|
||
|
|
|
||
|
|
grid rowconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid rowconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
grid rowconfigure $parent 2 -weight 0 -minsize 0
|
||
|
|
|
||
|
|
grid columnconfigure $parent 0 -weight 0 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 0 -minsize \
|
||
|
|
[winfo pixels $itk_component(label) \
|
||
|
|
$itk_option(-labelmargin)]
|
||
|
|
grid columnconfigure $parent 2 -weight 1 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
default {
|
||
|
|
error "bad labelpos option\
|
||
|
|
\"$itk_option(-labelpos)\": should be\
|
||
|
|
nw, n, ne, sw, s, se, en, e, es, wn, w, or ws"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# Else, neither the label text, bitmap, or image have a value, so
|
||
|
|
# forget them so they don't appear and manage only the childsite.
|
||
|
|
#
|
||
|
|
} else {
|
||
|
|
grid forget $itk_component(label)
|
||
|
|
|
||
|
|
grid $itk_component(lwchildsite) -row 0 -column 0 -sticky $itk_option(-sticky)
|
||
|
|
|
||
|
|
set parent [winfo parent $itk_component(lwchildsite)]
|
||
|
|
|
||
|
|
grid rowconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid rowconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
grid rowconfigure $parent 2 -weight 0 -minsize 0
|
||
|
|
grid columnconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
grid columnconfigure $parent 2 -weight 0 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# Reset the resposition flag.
|
||
|
|
#
|
||
|
|
set _reposition ""
|
||
|
|
}
|