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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