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376 lines
12 KiB
Plaintext
376 lines
12 KiB
Plaintext
15 years ago
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# Shell
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# ----------------------------------------------------------------------
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# This class is implements a shell which is a top level widget
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# giving a childsite and providing activate, deactivate, and center
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# methods.
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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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# Kris Raney EMAIL: kraney@spd.dsccc.com
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#
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# @(#) $Id: shell.itk,v 1.7 2002/02/25 06:43:26 mgbacke Exp $
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# ----------------------------------------------------------------------
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# Copyright (c) 1996 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 Shell {
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keep -background -cursor -modality
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}
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# ------------------------------------------------------------------
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# SHELL
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# ------------------------------------------------------------------
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itcl::class iwidgets::Shell {
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inherit itk::Toplevel
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constructor {args} {}
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itk_option define -master master Window ""
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itk_option define -modality modality Modality none
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itk_option define -padx padX Pad 0
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itk_option define -pady padY Pad 0
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itk_option define -width width Width 0
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itk_option define -height height Height 0
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public method childsite {}
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public method activate {}
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public method deactivate {args}
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public method center {{widget {}}}
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private variable _result {} ;# Resultant value for modal activation.
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private variable _busied {} ;# List of busied top level widgets.
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common grabstack {}
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common _wait
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}
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#
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# Provide a lowercased access method for the Shell class.
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#
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proc ::iwidgets::shell {pathName args} {
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uplevel ::iwidgets::Shell $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::Shell::constructor {args} {
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itk_option add hull.width hull.height
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#
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# Maintain a withdrawn state until activated.
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#
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wm withdraw $itk_component(hull)
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#
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# Create the user child site
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#
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itk_component add -protected shellchildsite {
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frame $itk_interior.shellchildsite
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}
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pack $itk_component(shellchildsite) -fill both -expand yes
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#
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# Set the itk_interior variable to be the childsite for derived
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# classes.
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#
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set itk_interior $itk_component(shellchildsite)
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#
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# Bind the window manager delete protocol to deactivation of the
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# widget. This can be overridden by the user via the execution
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# of a similar command outside the class.
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#
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wm protocol $itk_component(hull) WM_DELETE_WINDOW [itcl::code $this deactivate]
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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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# ------------------------------------------------------------------
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# OPTIONS
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# ------------------------------------------------------------------
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# ------------------------------------------------------------------
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# OPTION: -master
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#
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# Specifies the master window for the shell. The window manager is
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# informed that the shell is a transient window whose master is
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# -masterwindow.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Shell::master {}
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# ------------------------------------------------------------------
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# OPTION: -modality
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#
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# Specify the modality of the dialog.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Shell::modality {
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switch $itk_option(-modality) {
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none -
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application -
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global {
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}
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default {
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error "bad modality option \"$itk_option(-modality)\":\
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should be none, application, or global"
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}
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}
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}
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# ------------------------------------------------------------------
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# OPTION: -padx
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#
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# Specifies a padding distance for the childsite in the X-direction.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Shell::padx {
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pack config $itk_component(shellchildsite) -padx $itk_option(-padx)
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}
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# ------------------------------------------------------------------
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# OPTION: -pady
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#
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# Specifies a padding distance for the childsite in the Y-direction.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Shell::pady {
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pack config $itk_component(shellchildsite) -pady $itk_option(-pady)
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}
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# ------------------------------------------------------------------
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# OPTION: -width
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#
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# Specifies the width of the shell. The value may be specified in
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# any of the forms acceptable to Tk_GetPixels. A value of zero
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# causes the width to be adjusted to the required value based on
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# the size requests of the components placed in the childsite.
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# Otherwise, the width is fixed.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Shell::width {
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#
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# The width option was added to the hull in the constructor.
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# So, any width value given is passed automatically to the
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# hull. All we have to do is play with the propagation.
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#
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if {$itk_option(-width) != 0} {
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pack propagate $itk_component(hull) no
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} else {
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pack propagate $itk_component(hull) yes
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}
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}
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# ------------------------------------------------------------------
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# OPTION: -height
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#
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# Specifies the height of the shell. The value may be specified in
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# any of the forms acceptable to Tk_GetPixels. A value of zero
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# causes the height to be adjusted to the required value based on
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# the size requests of the components placed in the childsite.
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# Otherwise, the height is fixed.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Shell::height {
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#
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# The height option was added to the hull in the constructor.
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# So, any height value given is passed automatically to the
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# hull. All we have to do is play with the propagation.
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#
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if {$itk_option(-height) != 0} {
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pack propagate $itk_component(hull) no
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} else {
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pack propagate $itk_component(hull) yes
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}
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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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# Return the pathname of the user accessible area.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Shell::childsite {} {
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return $itk_component(shellchildsite)
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}
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# ------------------------------------------------------------------
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# METHOD: activate
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#
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# Display the dialog and wait based on the modality. For application
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# and global modal activations, perform a grab operation, and wait
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# for the result. The result may be returned via an argument to the
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# "deactivate" method.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Shell::activate {} {
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if {[winfo ismapped $itk_component(hull)]} {
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raise $itk_component(hull)
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return
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}
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if {($itk_option(-master) != {}) && \
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[winfo exists $itk_option(-master)]} {
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wm transient $itk_component(hull) $itk_option(-master)
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}
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set _wait($this) 0
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raise $itk_component(hull)
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wm deiconify $itk_component(hull)
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tkwait visibility $itk_component(hull)
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# Need to flush the event loop. This line added as a result of
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# SF ticket #227885.
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update idletasks
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if {$itk_option(-modality) == "application"} {
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if {$grabstack != {}} {
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grab release [lindex $grabstack end]
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}
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set err 1
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while {$err == 1} {
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set err [catch [list grab $itk_component(hull)]]
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if {$err == 1} {
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after 1000
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}
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}
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lappend grabstack [list grab $itk_component(hull)]
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tkwait variable [itcl::scope _wait($this)]
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return $_result
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} elseif {$itk_option(-modality) == "global" } {
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if {$grabstack != {}} {
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grab release [lindex $grabstack end]
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}
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set err 1
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while {$err == 1} {
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set err [catch [list grab -global $itk_component(hull)]]
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if {$err == 1} {
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after 1000
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}
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}
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lappend grabstack [list grab -global $itk_component(hull)]
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tkwait variable [itcl::scope _wait($this)]
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return $_result
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}
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}
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# ------------------------------------------------------------------
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# METHOD: deactivate
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#
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# Deactivate the display of the dialog. The method takes an optional
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# argument to passed to the "activate" method which returns the value.
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# This is only effective for application and global modal dialogs.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Shell::deactivate {args} {
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if {! [winfo ismapped $itk_component(hull)]} {
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return
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}
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if {$itk_option(-modality) == "none"} {
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wm withdraw $itk_component(hull)
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} elseif {$itk_option(-modality) == "application"} {
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grab release $itk_component(hull)
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if {$grabstack != {}} {
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if {[set grabstack [lreplace $grabstack end end]] != {}} {
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eval [lindex $grabstack end]
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}
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}
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wm withdraw $itk_component(hull)
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} elseif {$itk_option(-modality) == "global"} {
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grab release $itk_component(hull)
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if {$grabstack != {}} {
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if {[set grabstack [lreplace $grabstack end end]] != {}} {
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eval [lindex $grabstack end]
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}
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}
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wm withdraw $itk_component(hull)
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}
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if {[llength $args]} {
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set _result $args
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} else {
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set _result {}
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}
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set _wait($this) 1
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return
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}
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# ------------------------------------------------------------------
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# METHOD: center
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#
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# Centers the dialog with respect to another widget or the screen
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# as a whole.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Shell::center {{widget {}}} {
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update idletasks
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set hull $itk_component(hull)
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set w [winfo width $hull]
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set h [winfo height $hull]
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set sh [winfo screenheight $hull] ;# display screen's height/width
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set sw [winfo screenwidth $hull]
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#
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# User can request it centered with respect to root by passing in '{}'
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#
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if { $widget == "" } {
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set reqX [expr {($sw-$w)/2}]
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set reqY [expr {($sh-$h)/2}]
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} else {
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set wfudge 5 ;# wm width fudge factor
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set hfudge 20 ;# wm height fudge factor
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set widgetW [winfo width $widget]
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set widgetH [winfo height $widget]
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set reqX [expr {[winfo rootx $widget]+($widgetW-($widgetW/2))-($w/2)}]
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set reqY [expr {[winfo rooty $widget]+($widgetH-($widgetH/2))-($h/2)}]
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#
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# Adjust for errors - if too long or too tall
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#
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if { ($reqX+$w+$wfudge) > $sw } { set reqX [expr {$sw-$w-$wfudge}] }
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if { $reqX < $wfudge } { set reqX $wfudge }
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if { ($reqY+$h+$hfudge) > $sh } { set reqY [expr {$sh-$h-$hfudge}] }
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if { $reqY < $hfudge } { set reqY $hfudge }
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}
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wm geometry $hull +$reqX+$reqY
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}
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