482 lines
12 KiB
Tcl
482 lines
12 KiB
Tcl
# -*- mode: TCL; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
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#
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# $Id: Control.tcl,v 1.9 2004/03/28 02:44:57 hobbs Exp $
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#
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# Control.tcl --
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#
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# Implements the TixControl Widget. It is called the "SpinBox"
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# in other toolkits.
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#
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# Copyright (c) 1993-1999 Ioi Kim Lam.
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# Copyright (c) 2000-2001 Tix Project Group.
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# Copyright (c) 2004 ActiveState
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#
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# See the file "license.terms" for information on usage and redistribution
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# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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tixWidgetClass tixControl {
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-classname TixControl
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-superclass tixLabelWidget
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-method {
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incr decr invoke update
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}
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-flag {
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-allowempty -autorepeat -command -decrcmd -disablecallback
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-disabledforeground -incrcmd -initwait -integer -llimit
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-repeatrate -max -min -selectmode -step -state -validatecmd
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-value -variable -ulimit
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}
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-forcecall {
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-variable -state
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}
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-configspec {
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{-allowempty allowEmpty AllowEmpty false}
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{-autorepeat autoRepeat AutoRepeat true}
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{-command command Command ""}
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{-decrcmd decrCmd DecrCmd ""}
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{-disablecallback disableCallback DisableCallback 0 tixVerifyBoolean}
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{-disabledforeground disabledForeground DisabledForeground #303030}
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{-incrcmd incrCmd IncrCmd ""}
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{-initwait initWait InitWait 500}
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{-integer integer Integer false}
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{-max max Max ""}
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{-min min Min ""}
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{-repeatrate repeatRate RepeatRate 50}
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{-step step Step 1}
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{-state state State normal}
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{-selectmode selectMode SelectMode normal}
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{-validatecmd validateCmd ValidateCmd ""}
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{-value value Value 0}
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{-variable variable Variable ""}
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}
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-alias {
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{-llimit -min}
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{-ulimit -max}
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}
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-default {
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{.borderWidth 0}
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{*entry.relief sunken}
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{*entry.width 5}
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{*label.anchor e}
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{*label.borderWidth 0}
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{*Button.anchor c}
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{*Button.borderWidth 2}
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{*Button.highlightThickness 1}
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{*Button.takeFocus 0}
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}
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}
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proc tixControl:InitWidgetRec {w} {
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upvar #0 $w data
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tixChainMethod $w InitWidgetRec
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set data(varInited) 0
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set data(serial) 0
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}
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proc tixControl:ConstructFramedWidget {w frame} {
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upvar #0 $w data
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tixChainMethod $w ConstructFramedWidget $frame
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set data(w:entry) [entry $frame.entry]
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set data(w:incr) \
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[button $frame.incr -bitmap [tix getbitmap incr] -takefocus 0]
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set data(w:decr) \
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[button $frame.decr -bitmap [tix getbitmap decr] -takefocus 0]
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# tixForm $data(w:entry) -left 0 -top 0 -bottom -1 -right $data(w:decr)
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# tixForm $data(w:incr) -right -1 -top 0 -bottom %50
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# tixForm $data(w:decr) -right -1 -top $data(w:incr) -bottom -1
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pack $data(w:entry) -side left -expand yes -fill both
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pack $data(w:decr) -side bottom -fill both -expand yes
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pack $data(w:incr) -side top -fill both -expand yes
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$data(w:entry) delete 0 end
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$data(w:entry) insert 0 $data(-value)
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# This value is used to configure the disable/normal fg of the ebtry
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set data(entryfg) [$data(w:entry) cget -fg]
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set data(labelfg) [$data(w:label) cget -fg]
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}
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proc tixControl:SetBindings {w} {
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upvar #0 $w data
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tixChainMethod $w SetBindings
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bind $data(w:incr) <ButtonPress-1> \
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[list after idle tixControl:StartRepeat $w 1]
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bind $data(w:decr) <ButtonPress-1> \
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[list after idle tixControl:StartRepeat $w -1]
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# These bindings will stop the button autorepeat when the
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# mouse button is up
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foreach btn [list $data(w:incr) $data(w:decr)] {
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bind $btn <ButtonRelease-1> [list tixControl:StopRepeat $w]
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}
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tixSetMegaWidget $data(w:entry) $w
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# If user press <return>, verify the value and call the -command
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#
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tixAddBindTag $data(w:entry) TixControl:Entry
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}
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proc tixControlBind {} {
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tixBind TixControl:Entry <Return> {
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tixControl:Invoke [tixGetMegaWidget %W] 1
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}
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tixBind TixControl:Entry <Escape> {
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tixControl:Escape [tixGetMegaWidget %W]
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}
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tixBind TixControl:Entry <Up> {
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[tixGetMegaWidget %W] incr
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}
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tixBind TixControl:Entry <Down> {
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[tixGetMegaWidget %W] decr
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}
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tixBind TixControl:Entry <FocusOut> {
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if {"%d" eq "NotifyNonlinear" || "%d" eq "NotifyNonlinearVirtual"} {
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tixControl:Tab [tixGetMegaWidget %W] %d
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}
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}
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tixBind TixControl:Entry <Any-KeyPress> {
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tixControl:KeyPress [tixGetMegaWidget %W]
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}
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tixBind TixControl:Entry <Any-Tab> {
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# This has a higher priority than the <Any-KeyPress> binding
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# --> so that data(edited) is not set
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}
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}
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#----------------------------------------------------------------------
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# CONFIG OPTIONS
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#----------------------------------------------------------------------
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proc tixControl:config-state {w arg} {
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upvar #0 $w data
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if {$arg eq "normal"} {
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$data(w:incr) config -state $arg
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$data(w:decr) config -state $arg
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catch {
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$data(w:label) config -fg $data(labelfg)
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}
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$data(w:entry) config -state $arg -fg $data(entryfg)
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} else {
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$data(w:incr) config -state $arg
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$data(w:decr) config -state $arg
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catch {
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$data(w:label) config -fg $data(-disabledforeground)
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}
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$data(w:entry) config -state $arg -fg $data(-disabledforeground)
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}
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}
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proc tixControl:config-value {w value} {
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upvar #0 $w data
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tixControl:SetValue $w $value 0 1
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# This will tell the Intrinsics: "Please use this value"
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# because "value" might be altered by SetValues
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#
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return $data(-value)
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}
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proc tixControl:config-variable {w arg} {
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upvar #0 $w data
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if {[tixVariable:ConfigVariable $w $arg]} {
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# The value of data(-value) is changed if tixVariable:ConfigVariable
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# returns true
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tixControl:SetValue $w $data(-value) 1 1
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}
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catch {
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unset data(varInited)
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}
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set data(-variable) $arg
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}
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#----------------------------------------------------------------------
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# User Commands
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#----------------------------------------------------------------------
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proc tixControl:incr {w {by 1}} {
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upvar #0 $w data
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if {$data(-state) ne "disabled"} {
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if {![catch {$data(w:entry) index sel.first}]} {
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$data(w:entry) select from end
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$data(w:entry) select to end
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}
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# CYGNUS - why set value before changing it?
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#tixControl:SetValue $w [$data(w:entry) get] 0 1
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tixControl:AdjustValue $w $by
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}
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}
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proc tixControl:decr {w {by 1}} {
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upvar #0 $w data
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if {$data(-state) ne "disabled"} {
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if {![catch {$data(w:entry) index sel.first}]} {
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$data(w:entry) select from end
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$data(w:entry) select to end
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}
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# CYGNUS - why set value before changing it?
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#tixControl:SetValue $w [$data(w:entry) get] 0 1
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tixControl:AdjustValue $w [expr {0 - $by}]
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}
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}
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proc tixControl:invoke {w} {
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upvar #0 $w data
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tixControl:Invoke $w 0
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}
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proc tixControl:update {w} {
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upvar #0 $w data
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if {[info exists data(edited)]} {
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tixControl:invoke $w
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}
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}
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#----------------------------------------------------------------------
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# Internal Commands
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#----------------------------------------------------------------------
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# Change the value by a multiple of the data(-step)
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#
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proc tixControl:AdjustValue {w amount} {
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upvar #0 $w data
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if {$amount == 1 && [llength $data(-incrcmd)]} {
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set newValue [tixEvalCmdBinding $w $data(-incrcmd) "" $data(-value)]
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} elseif {$amount == -1 && [llength $data(-decrcmd)]} {
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set newValue [tixEvalCmdBinding $w $data(-decrcmd) "" $data(-value)]
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} else {
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set newValue [expr {$data(-value) + $amount * $data(-step)}]
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}
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if {$data(-state) ne "disabled"} {
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tixControl:SetValue $w $newValue 0 1
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}
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}
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proc tixControl:SetValue {w newvalue noUpdate forced} {
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upvar #0 $w data
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if {[$data(w:entry) selection present]} {
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set oldSelection [list [$data(w:entry) index sel.first] \
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[$data(w:entry) index sel.last]]
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}
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set oldvalue $data(-value)
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set oldCursor [$data(w:entry) index insert]
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set changed 0
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if {[llength $data(-validatecmd)]} {
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# Call the user supplied validation command
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#
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set data(-value) [tixEvalCmdBinding $w $data(-validatecmd) "" $newvalue]
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} else {
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# Here we only allow int or floating numbers
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#
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# If the new value is not a valid number, the old value will be
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# kept due to the "catch" statements
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#
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if {[catch {expr 0+$newvalue}]} {
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set newvalue 0
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set data(-value) 0
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set changed 1
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}
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if {$newvalue == ""} {
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if {![string is true -strict $data(-allowempty)]} {
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set newvalue 0
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set changed 1
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} else {
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set data(-value) ""
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}
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}
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if {$newvalue != ""} {
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# Change this to a valid decimal string (trim leading 0)
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#
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regsub -- {^[0]*} $newvalue "" newvalue
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if {[catch {expr 0+$newvalue}]} {
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set newvalue 0
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set data(-value) 0
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set changed 1
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}
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if {$newvalue == ""} {
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set newvalue 0
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}
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if {[string is true -strict $data(-integer)]} {
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set data(-value) [tixGetInt -nocomplain $newvalue]
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} else {
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if {[catch {set data(-value) [format "%d" $newvalue]}]} {
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if {[catch {set data(-value) [expr $newvalue+0.0]}]} {
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set data(-value) $oldvalue
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}
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}
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}
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# Now perform boundary checking
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#
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if {$data(-max) != "" && $data(-value) > $data(-max)} {
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set data(-value) $data(-max)
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}
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if {$data(-min) != "" && $data(-value) < $data(-min)} {
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set data(-value) $data(-min)
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}
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}
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}
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if {! $noUpdate} {
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tixVariable:UpdateVariable $w
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}
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if {$forced || ($newvalue ne $data(-value)) || $changed} {
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$data(w:entry) delete 0 end
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$data(w:entry) insert 0 $data(-value)
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$data(w:entry) icursor $oldCursor
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if {[info exists oldSelection]} {
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eval [list $data(w:entry) selection range] $oldSelection
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}
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}
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if {!$data(-disablecallback) && $data(-command) != ""} {
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if {![info exists data(varInited)]} {
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set bind(specs) ""
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tixEvalCmdBinding $w $data(-command) bind $data(-value)
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}
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}
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}
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proc tixControl:Invoke {w forced} {
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upvar #0 $w data
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catch {
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unset data(edited)
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}
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if {[catch {$data(w:entry) index sel.first}] == 0} {
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# THIS ENTRY OWNS SELECTION --> TURN IT OFF
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#
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$data(w:entry) select from end
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$data(w:entry) select to end
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}
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tixControl:SetValue $w [$data(w:entry) get] 0 $forced
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}
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#----------------------------------------------------------------------
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# The three functions StartRepeat, Repeat and StopRepeat make use of the
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# data(serial) variable to discard spurious repeats: If a button is clicked
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# repeatedly but is not hold down, the serial counter will increase
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# successively and all "after" time event handlers will be discarded
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#----------------------------------------------------------------------
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proc tixControl:StartRepeat {w amount} {
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if {![winfo exists $w]} {
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return
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}
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upvar #0 $w data
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incr data(serial)
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# CYGNUS bug fix
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# Need to set a local variable because otherwise the buttonrelease
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# callback could change the value of data(serial) between now and
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# the time the repeat is scheduled.
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set serial $data(serial)
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if {![catch {$data(w:entry) index sel.first}]} {
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$data(w:entry) select from end
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$data(w:entry) select to end
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}
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if {[info exists data(edited)]} {
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unset data(edited)
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tixControl:SetValue $w [$data(w:entry) get] 0 1
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}
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tixControl:AdjustValue $w $amount
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if {$data(-autorepeat)} {
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after $data(-initwait) tixControl:Repeat $w $amount $serial
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}
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focus $data(w:entry)
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}
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proc tixControl:Repeat {w amount serial} {
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if {![winfo exists $w]} {
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return
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}
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upvar #0 $w data
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if {$serial eq $data(serial)} {
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tixControl:AdjustValue $w $amount
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if {$data(-autorepeat)} {
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after $data(-repeatrate) tixControl:Repeat $w $amount $serial
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}
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}
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}
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proc tixControl:StopRepeat {w} {
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upvar #0 $w data
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incr data(serial)
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}
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proc tixControl:Destructor {w} {
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tixVariable:DeleteVariable $w
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# Chain this to the superclass
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#
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tixChainMethod $w Destructor
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}
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# ToDo: maybe should return -code break if the value is not good ...
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#
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proc tixControl:Tab {w detail} {
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upvar #0 $w data
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if {![info exists data(edited)]} {
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return
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} else {
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unset data(edited)
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}
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tixControl:invoke $w
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}
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proc tixControl:Escape {w} {
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upvar #0 $w data
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$data(w:entry) delete 0 end
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$data(w:entry) insert 0 $data(-value)
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}
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proc tixControl:KeyPress {w} {
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upvar #0 $w data
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if {$data(-selectmode) eq "normal"} {
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set data(edited) 0
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return
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} else {
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# == "immediate"
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after 1 tixControl:invoke $w
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}
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}
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