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# -*- mode: TCL; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
#
# $Id: Balloon.tcl,v 1.7 2008/02/27 22:17:28 hobbs Exp $
#
# Balloon.tcl --
#
# The help widget. It provides both "balloon" type of help
# message and "status bar" type of help message. You can use
# this widget to indicate the function of the widgets inside
# your application.
#
# Copyright (c) 1993-1999 Ioi Kim Lam.
# Copyright (c) 2000-2001 Tix Project Group.
# Copyright (c) 2004 ActiveState
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
tixWidgetClass tixBalloon {
-classname TixBalloon
-superclass tixShell
-method {
bind post unbind
}
-flag {
-installcolormap -initwait -state -statusbar -cursor
}
-configspec {
{-installcolormap installColormap InstallColormap false}
{-initwait initWait InitWait 1000}
{-state state State both}
{-statusbar statusBar StatusBar ""}
{-cursor cursor Cursor {}}
}
-default {
{*background #ffff60}
{*foreground black}
{*borderWidth 0}
{.borderWidth 1}
{.background black}
{*Label.anchor w}
{*Label.justify left}
}
}
# static seem to be -installcolormap -initwait -statusbar -cursor
# Class Record
#
global tixBalloon
set tixBalloon(bals) ""
proc tixBalloon:InitWidgetRec {w} {
upvar #0 $w data
global tixBalloon
tixChainMethod $w InitWidgetRec
set data(isActive) 0
set data(client) ""
lappend tixBalloon(bals) $w
}
proc tixBalloon:ConstructWidget {w} {
upvar #0 $w data
tixChainMethod $w ConstructWidget
if {[tk windowingsystem] eq "aqua"} {
::tk::unsupported::MacWindowStyle style $w help none
} else {
wm overrideredirect $w 1
}
catch {wm attributes $w -topmost 1}
wm positionfrom $w program
wm withdraw $w
# Frame 1 : arrow
frame $w.f1 -bd 0
set data(w:label) [label $w.f1.lab -bd 0 -relief flat \
-bitmap [tix getbitmap balarrow]]
pack $data(w:label) -side left -padx 1 -pady 1
# Frame 2 : Message
frame $w.f2 -bd 0
set data(w:message) [label $w.f2.message -padx 0 -pady 0 -bd 0]
pack $data(w:message) -side left -expand yes -fill both -padx 10 -pady 1
# Pack all
pack $w.f1 -fill both
pack $w.f2 -fill both
# This is an event tag used by the clients
#
bind TixBal$w <Destroy> [list tixBalloon:ClientDestroy $w %W]
}
proc tixBalloon:Destructor {w} {
global tixBalloon
set bals ""
foreach b $tixBalloon(bals) {
if {$w != $b} {
lappend bals $b
}
}
set tixBalloon(bals) $bals
tixChainMethod $w Destructor
}
#----------------------------------------------------------------------
# Config:
#----------------------------------------------------------------------
proc tixBalloon:config-state {w value} {
upvar #0 $w data
set re {^(none|balloon|status|both)$}
if {![regexp -- $re $value]} {
error "invalid value $value, must be none, balloon, status, or both"
}
}
#----------------------------------------------------------------------
# "RAW" event bindings:
#----------------------------------------------------------------------
bind all <B1-Motion> "+tixBalloon_XXMotion %X %Y 1"
bind all <B2-Motion> "+tixBalloon_XXMotion %X %Y 2"
bind all <B3-Motion> "+tixBalloon_XXMotion %X %Y 3"
bind all <B4-Motion> "+tixBalloon_XXMotion %X %Y 4"
bind all <B5-Motion> "+tixBalloon_XXMotion %X %Y 5"
bind all <Any-Motion> "+tixBalloon_XXMotion %X %Y 0"
# Should %b be 0? %b is illegal
bind all <Leave> "+tixBalloon_XXMotion %X %Y 0"
bind all <Button> "+tixBalloon_XXButton %X %Y %b"
bind all <ButtonRelease> "+tixBalloon_XXButtonUp %X %Y %b"
proc tixBalloon_XXMotion {rootX rootY b} {
global tixBalloon
foreach w $tixBalloon(bals) {
tixBalloon:XXMotion $w $rootX $rootY $b
}
}
proc tixBalloon_XXButton {rootX rootY b} {
global tixBalloon
foreach w $tixBalloon(bals) {
tixBalloon:XXButton $w $rootX $rootY $b
}
}
proc tixBalloon_XXButtonUp {rootX rootY b} {
global tixBalloon
foreach w $tixBalloon(bals) {
tixBalloon:XXButtonUp $w $rootX $rootY $b
}
}
# return true if d is a descendant of w
#
proc tixIsDescendant {w d} {
return [expr {$w eq "." || [string match $w.* $d]}]
}
# All the button events are fine if the ballooned widget is
# a descendant of the grabbing widget
#
proc tixBalloon:GrabBad {w cw} {
global tixBalloon
set g [grab current $w]
if {$g == ""} {
return 0
}
if {[info exists tixBalloon(g_ignore,$g)]} {
return 1
}
if {[info exists tixBalloon(g_ignore,[winfo class $g])]} {
return 1
}
if {$g == $cw || [tixIsDescendant $g $cw]} {
return 0
}
return 1
}
proc tixBalloon:XXMotion {w rootX rootY b} {
upvar #0 $w data
if {![info exists data(-state)]} {
# puts "tixBalloon:XXMotion called without a state\n$w"
set data(state) none
return
}
if {$data(-state) eq "none"} {
return
}
if {$b == 0} {
if {[info exists data(b:1)]} {unset data(b:1)}
if {[info exists data(b:2)]} {unset data(b:2)}
if {[info exists data(b:3)]} {unset data(b:3)}
if {[info exists data(b:4)]} {unset data(b:4)}
if {[info exists data(b:5)]} {unset data(b:5)}
}
if {[llength [array names data b:*]]} {
# Some buttons are down. Do nothing
#
return
}
set cw [winfo containing -displayof $w $rootX $rootY]
if {[tixBalloon:GrabBad $w $cw]} {
return
}
# Find the a client window that matches
#
if {$w eq $cw || [string match $w.* $cw]} {
# Cursor moved over the balloon -- Ignore
return
}
while {$cw != ""} {
if {[info exists data(m:$cw)]} {
set client $cw
break
} else {
set cw [winfo parent $cw]
}
}
if {![info exists client]} {
# The cursor is at a position covered by a non-client
# Popdown the balloon if it is up
if {$data(isActive)} {
tixBalloon:Deactivate $w
}
set data(client) ""
if {[info exists data(cancel)]} {
unset data(cancel)
}
return
}
if {$data(client) ne $client} {
if {$data(isActive)} {
tixBalloon:Deactivate $w
}
set data(client) $client
after $data(-initwait) tixBalloon:SwitchToClient $w $client
}
}
proc tixBalloon:XXButton {w rootX rootY b} {
upvar #0 $w data
tixBalloon:XXMotion $w $rootX $rootY $b
set data(b:$b) 1
if {$data(isActive)} {
tixBalloon:Deactivate $w
} else {
set data(cancel) 1
}
}
proc tixBalloon:XXButtonUp {w rootX rootY b} {
upvar #0 $w data
tixBalloon:XXMotion $w $rootX $rootY $b
if {[info exists data(b:$b)]} {
unset data(b:$b)
}
}
#----------------------------------------------------------------------
# "COOKED" event bindings:
#----------------------------------------------------------------------
# switch the balloon to a new client
#
proc tixBalloon:SwitchToClient {w client} {
upvar #0 $w data
if {![winfo exists $w]} {
return
}
if {![winfo exists $client]} {
return
}
if {$client ne $data(client)} {
return
}
if {[info exists data(cancel)]} {
unset data(cancel)
return
}
if {[tixBalloon:GrabBad $w $w]} {
return
}
tixBalloon:Activate $w
}
proc tixBalloon:ClientDestroy {w client} {
if {![winfo exists $w]} {
return
}
upvar #0 $w data
if {$data(client) eq $client} {
tixBalloon:Deactivate $w
set data(client) ""
}
# Maybe thses have already been unset by the Destroy method
#
if {[info exists data(m:$client)]} {unset data(m:$client)}
if {[info exists data(s:$client)]} {unset data(s:$client)}
}
#----------------------------------------------------------------------
# Popping up balloon:
#----------------------------------------------------------------------
proc tixBalloon:Activate {w} {
upvar #0 $w data
if {[tixBalloon:GrabBad $w $w]} {
return
}
if {[winfo containing -displayof $w \
[winfo pointerx $w] [winfo pointery $w]] == ""} {
return
}
if {![info exists data(-state)]} {
# puts "tixBalloon:Activate called without a state\n$w"
set data(state) none
return
}
if {$data(-state) eq "none"} {
return
}
switch -exact -- $data(-state) {
"both" {
tixBalloon:PopUp $w
tixBalloon:SetStatus $w
}
"balloon" {
tixBalloon:PopUp $w
}
"status" {
tixBalloon:SetStatus $w
}
}
set data(isActive) 1
after 200 tixBalloon:Verify $w
}
# %% Perhaps this is no more needed
#
proc tixBalloon:Verify {w} {
upvar #0 $w data
if {![winfo exists $w]} {
return
}
if {!$data(isActive)} {
return
}
if {[tixBalloon:GrabBad $w $w]} {
tixBalloon:Deactivate $w
return
}
if {[winfo containing -displayof $w \
[winfo pointerx $w] [winfo pointery $w]] == ""} {
tixBalloon:Deactivate $w
return
}
after 200 tixBalloon:Verify $w
}
proc tixBalloon:Deactivate {w} {
upvar #0 $w data
tixBalloon:PopDown $w
tixBalloon:ClearStatus $w
set data(isActive) 0
if {[info exists data(cancel)]} {
unset data(cancel)
}
}
proc tixBalloon:PopUp {w} {
upvar #0 $w data
if {[string is true -strict $data(-installcolormap)]} {
wm colormapwindows [winfo toplevel $data(client)] $w
}
# trick: the following lines allow the balloon window to
# acquire a stable width and height when it is finally
# put on the visible screen
#
set client $data(client)
if {$data(m:$client) == ""} {return ""}
$data(w:message) config -text $data(m:$client)
wm geometry $w +10000+10000
wm deiconify $w
raise $w
update
# The windows may become destroyed as a result of the "update" command
#
if {![winfo exists $w]} {
return
}
if {![winfo exists $client]} {
return
}
# Put it on the visible screen
#
set x [expr {[winfo rootx $client]+[winfo width $client]/2}]
set y [expr {int([winfo rooty $client]+[winfo height $client]/1.3)}]
set width [winfo reqwidth $w]
set height [winfo reqheight $w]
set scrwidth [winfo vrootwidth $w]
set scrheight [winfo vrootheight $w]
# If the balloon is too far right, pull it back to the left
#
if {($x + $width) > $scrwidth} {
set x [expr {$scrwidth - $width}]
}
# If the balloon is too far left, pull it back to the right
#
if {$x < 0} {
set x 0
}
# If the listbox is below bottom of screen, put it upwards
#
if {($y + $height) > $scrheight} {
set y [expr {$scrheight-$height}]
}
if {$y < 0} {
set y 0
}
wm geometry $w +$x+$y
after idle raise $w
}
proc tixBalloon:PopDown {w} {
upvar #0 $w data
# Close the balloon
#
wm withdraw $w
# We don't set the data(client) to be zero, so that the balloon
# will re-appear only if you move out then in the client window
# set data(client) ""
}
proc tixBalloon:SetStatus {w} {
upvar #0 $w data
if {![winfo exists $data(-statusbar)]
|| ![info exists data(s:$data(client))]} {
return
}
set vv [$data(-statusbar) cget -textvariable]
if {$vv == ""} {
$data(-statusbar) config -text $data(s:$data(client))
} else {
uplevel #0 set $vv [list $data(s:$data(client))]
}
}
proc tixBalloon:ClearStatus {w} {
upvar #0 $w data
if {![winfo exists $data(-statusbar)]} {
return
}
# Clear the StatusBar widget
#
set vv [$data(-statusbar) cget -textvariable]
if {$vv == ""} {
$data(-statusbar) config -text ""
} else {
uplevel #0 set $vv [list ""]
}
}
#----------------------------------------------------------------------
# PublicMethods:
#----------------------------------------------------------------------
# %% if balloon is already popped-up for this client, change mesage
#
proc tixBalloon:bind {w client args} {
upvar #0 $w data
set alreadyBound [info exists data(m:$client)]
set opt(-balloonmsg) ""
set opt(-statusmsg) ""
set opt(-msg) ""
tixHandleOptions opt {-balloonmsg -msg -statusmsg} $args
if {$opt(-balloonmsg) != ""} {
set data(m:$client) $opt(-balloonmsg)
} else {
set data(m:$client) $opt(-msg)
}
if {$opt(-statusmsg) != ""} {
set data(s:$client) $opt(-statusmsg)
} else {
set data(s:$client) $opt(-msg)
}
tixAppendBindTag $client TixBal$w
}
proc tixBalloon:post {w client} {
upvar #0 $w data
if {![info exists data(m:$client)] || $data(m:$client) == ""} {
return
}
tixBalloon:Enter $w $client
incr data(fakeEnter)
}
proc tixBalloon:unbind {w client} {
upvar #0 $w data
if {[info exists data(m:$client)]} {
if {[info exists data(m:$client)]} {unset data(m:$client)}
if {[info exists data(s:$client)]} {unset data(s:$client)}
if {[winfo exists $client]} {
catch {tixDeleteBindTag $client TixBal$w}
}
}
}
#----------------------------------------------------------------------
#
# Utility function
#
#----------------------------------------------------------------------
#
# $w can be a widget name or a classs name
proc tixBalIgnoreWhenGrabbed {wc} {
global tixBalloon
set tixBalloon(g_ignore,$wc) ""
}
tixBalIgnoreWhenGrabbed TixComboBox
tixBalIgnoreWhenGrabbed Menu
tixBalIgnoreWhenGrabbed Menubutton