306 lines
13 KiB
Tcl
306 lines
13 KiB
Tcl
#
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# This Tcl/Tk script is quoted from <http://wiki.tcl.tk/10615>.
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#
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package require Tk
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namespace eval ::tktree {
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# Images used for open and close state of subgroups
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set ::tktree::imgcollapse [image create photo .tktreeopenbm -data {
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R0lGODdhCQAJAIAAAAEBAf///ywAAAAACQAJAAACEISPoRvG614D80x5ZXyogwIAOw==}]
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set ::tktree::imgexpand [image create photo .tktreeclosebm -data {
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R0lGODdhCQAJAIAAAAEBAf///ywAAAAACQAJAAACEYSPoRu28KCSDSJLc44s3lMAADs=}]
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###Default images for groups and children
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set ::tktree::imgsubgroups [image create photo .tktreeimgfolder -data {
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R0lGODlhEAANAKIAANnZ2Xh4eLi4uPj4APj4+AAAAP///////yH5BAEAAAAA
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LAAAAAAQAA0AAANkCIChiqDLITgyEgi6GoIjIyMYugCBpMsaWBA0giMjIzgy
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UYBBMjIoIyODEgVBODIygiMjE1gQJIMyMjIoI1GAQSMjODIyghMFQSgjI4My
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MhJYEDSCIyMjODJRgKHLXAiApcsMmAA7}]
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set ::tktree::imgchildren [image create photo .tktreeimgfile -data {
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R0lGODlhDQAQAKIAANnZ2Xh4ePj4+Li4uAAAAP///////////yH5BAEAAAAA
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LAAAAAANABAAAANSGLoLgACBoqsRCBAoujqCASGDojtESCEihCREIjgUKLo8
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hCGCpCsySIGiy0MYIki6IoMUKLo8hCGCpCsySIGiy0MYKLo8hIGiy0MYOLo8
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SLrMCQA7}]
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#### Swtich all subgroups of a layer to open or close
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proc ::tktree::switchlayer {win opn {layer /}} {
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variable cfg
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foreach child $cfg($win,$layer:subgroups) {
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set cfg($win,$child:open) $opn
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switchlayer $win $opn $child
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}
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buildwhenidle $win
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}
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#### will open or close the item given
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proc ::tktree::switchstate {win item} {
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set ::tktree::cfg($win,$item:open) [expr ! $::tktree::cfg($win,$item:open)]
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buildwhenidle $win
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}
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#### Select the next item up or down
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proc ::tktree::updown {win down} {
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variable cfg
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set index [lsearch -exact $cfg($win,sortlist) $cfg($win,selection)]
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if {$down} {incr index} {incr index -1}
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if {$index < 0} {set index end} elseif {$index >= [llength $cfg($win,sortlist)]} {set index 0}
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setselection $win [lindex $cfg($win,sortlist) $index]
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}
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#### left-right button binding commands
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proc ::tktree::leftright {win right} {
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variable cfg
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set item $cfg($win,selection)
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set index [lsearch -exact $cfg($win,sortlist) $item]
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set parentindex [lsearch -exact $cfg($win,sortlist) [file dirname $item]]
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if {$parentindex == -1} {set parentindex [expr $index - 1]}
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if {$cfg($win,$item:group)} {
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if {$right} {
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if {$cfg($win,$item:open)} {incr index} {set cfg($win,$item:open) 1}
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} else {
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if {$cfg($win,$item:open)} {set cfg($win,$item:open) 0} {set index $parentindex}
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}
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} else {
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if {$right} {incr index} {set index $parentindex}
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}
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if {$index < 0} {set index end} elseif {$index >= [llength $cfg($win,sortlist)]} {set index 0}
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setselection $win [lindex $cfg($win,sortlist) $index]
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buildwhenidle $win
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}
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#### will return the pathname of the item at x and y cooridinates
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proc ::tktree::labelat {win x y} {
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set x [$win canvasx $x]; set y [$win canvasy $y]
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foreach m [$win find overlapping $x $y $x $y] {
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if {[info exists ::tktree::cfg($win,tag:$m)]} {return $::tktree::cfg($win,tag:$m)}
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}
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return ""
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}
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#### will return the path of the current selection in the given tree widget
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proc ::tktree::getselection {win} {
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return $::tktree::cfg($win,selection)
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}
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#### adjust the scrollview to show the selected item as needed
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proc ::tktree::scrolladjust {win tag} {
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update
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set item [$win bbox $tag]
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set region [$win cget -scrollregion]
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foreach {axis idx1 idx2} {yview 1 3 xview 0 2} {
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set range [expr abs([lindex $region $idx2]) - abs([lindex $region $idx1])]
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set itemtop [lindex $item $idx1]; set itembot [lindex $item $idx2]
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set viewtop [expr $range * [lindex [$win $axis] 0]]
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set viewbot [expr $range * [lindex [$win $axis] 1]]
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if {$itembot > $viewbot} {$win $axis moveto [expr ($itembot. - $viewbot + $viewtop) / $range]}
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if {$itemtop < $viewtop} {$win $axis moveto [expr $itemtop. / $range]}
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}
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}
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#### will set the current selection to the given item on the given tree
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proc ::tktree::setselection {win item} {
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variable cfg
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if {![llength $cfg($win,sortlist)]} {return}
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if {$item eq ""} {set item [lindex $cfg($win,sortlist) 0]}
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if {![info exists cfg($win,$item:tag)]} {set item [lindex $cfg($win,sortlist) 0]}
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if {[$win gettags $cfg($win,$item:tag)] ne ""} {
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$win select from $cfg($win,$item:tag) 0
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$win select to $cfg($win,$item:tag) end
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set cfg($win,selection) $item
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scrolladjust $win $cfg($win,$item:tag)
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} {
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setselection $win "/[lindex $cfg($win,/:sortlist) 0]"
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}
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}
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#### will delete the item given from the tree given
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proc ::tktree::delitem {win item} {
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variable cfg
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if {$item eq "/"} {
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array unset cfg $win,* ; catch {destroy $win}
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} {
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set group [file dirname $item]
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if {$cfg($win,$item:group)} {set type subgroups} {set type children}
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set index [lsearch -exact $cfg($win,$group:$type) $item]
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set cfg($win,$group:$type) [lreplace $cfg($win,$group:$type) $index $index]
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array unset cfg $win,$item*
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buildwhenidle $win
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}
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}
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#### create a new item in the tree and rebuild the widget
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proc ::tktree::newitem {win item args} {
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variable cfg
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if {[string index $item 0] ne "/"} {set item /$item}
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if {[string index $item end] eq "/"} {
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set subgroup 1
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set type subgroups
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set item [string range $item 0 end-1]
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set cfg($win,$item:command) [list ::tktree::switchstate $win $item]
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} {
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set subgroup 0
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set type children
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set cfg($win,$item:command) {}
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}
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#Build parent group if needed
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set group [file dirname $item]
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if {![info exists cfg($win,$group:open)]} {newitem $win "$group\/"}
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lappend cfg($win,$group:$type) $item
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#Configure the new item
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set cfg($win,$item:group) $subgroup
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set cfg($win,$item:subgroups) {}
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set cfg($win,$item:children) {}
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set cfg($win,$item:sortlist) {}
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set cfg($win,$item:tags) {}
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set cfg($win,$item:open) 0
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set cfg($win,$item:image) {}
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set cfg($win,$item:textcolor) $cfg($win,textcolor)
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set cfg($win,$item:font) $cfg($win,font)
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if {$cfg($win,images)} {set cfg($win,$item:image) [eval list \$::tktree::img$type]}
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foreach {confitem confval} $args {
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switch -exact -- $confitem {
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-textcolor {set cfg($win,$item:textcolor) $confval}
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-command {set cfg($win,$item:command) $confval}
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-image {set cfg($win,$item:image) $confval}
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-font {set cfg($win,$item:font) $confval}
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}
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}
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buildwhenidle $win
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}
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#### Draw the given layer of the tree on the canvas starting at xposition
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proc ::tktree::buildlayer {win layer xpos} {
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variable cfg
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#Record y positions for vertical line later on
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set ystart $cfg($win,y); set yend $cfg($win,y)
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if {$layer eq "/"} {set cfg($win,sortlist) ""}
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foreach child $cfg($win,$layer:sortlist) {
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lappend cfg($win,sortlist) $child
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#Check spacing required for images
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set imgwidth 0; set imgheight 0
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if {[string length $cfg($win,$child:image)]} {
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set imgwidth [expr ([image width $cfg($win,$child:image)] + 2) / 2]
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set imgheight [expr ([image height $cfg($win,$child:image)] + 2) / 2]
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}
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#find X-axis points for image, horiz line, and text
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if {$imgwidth} {
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set centerX [expr $imgwidth + $xpos + 7]
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set rightX [expr $xpos + 7]
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set textX [expr ($imgwidth * 2) + $xpos + 10]
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} {
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set centerX [expr $xpos + 10]
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set rightX [expr $centerX + 4]
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set textX [expr $rightX + 1]
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}
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#Find the proper amount to increment the y axis
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set fontheight [lindex [font metrics $cfg($win,$child:font)] 5]
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set yincr [expr ($fontheight + 1) / 2]
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if {$imgheight > $yincr} {set yincr $imgheight}
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incr cfg($win,y) $yincr
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#Draw the horizonal line
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$win create line $xpos $cfg($win,y) $rightX $cfg($win,y) -fill $cfg($win,linecolor)
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set yend $cfg($win,y)
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#Draw the image, if it exists
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if {$imgwidth} {
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set it [$win create image $centerX $cfg($win,y) -image $cfg($win,$child:image)]
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$win bind $it <1> [list ::tktree::setselection $win $child]
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}
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#Draw text and store tags for reference
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set cfg($win,$child:tag) [$win create text $textX $cfg($win,y) \
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-text [file tail $child] -font $cfg($win,$child:font) -anchor w -tags x -fill $cfg($win,$child:textcolor)]
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set cfg($win,tag:$cfg($win,$child:tag)) $child
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#Command binding
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$win bind $cfg($win,$child:tag) <1> [list ::tktree::setselection $win $child]
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$win bind $cfg($win,$child:tag) <Double-1> $cfg($win,$child:command)
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#next step up on the y axis
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incr cfg($win,y) $yincr
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#If its a group, add open-close functionality
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if {$cfg($win,$child:group)} {
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if {$cfg($win,$child:open)} {set img collapse} {set img expand}
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set ocimg [$win create image $xpos [expr $cfg($win,y) - $yincr] -image [eval list \$::tktree::img$img]]
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$win bind $ocimg <1> [list ::tktree::switchstate $win $child]
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if {$cfg($win,$child:open)} {buildlayer $win $child $centerX}
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}
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}
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#Vertical line
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$win lower [$win create line $xpos [expr $ystart - 7] $xpos $yend -fill $cfg($win,linecolor)]
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}
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#### sort the layer by subgroups then children
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proc ::tktree::sortlayer {win {layer /}} {
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variable cfg
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set cfg($win,$layer:subgroups) [lsort -dictionary $cfg($win,$layer:subgroups)]
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set cfg($win,$layer:children) [lsort -dictionary $cfg($win,$layer:children)]
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set cfg($win,$layer:sortlist) [join [list $cfg($win,$layer:subgroups) $cfg($win,$layer:children)]]
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foreach group $cfg($win,$layer:subgroups) {sortlayer $win $group}
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}
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#### build the tree at the given path
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proc ::tktree::buildtree {win} {
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variable cfg
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$win delete all
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sortlayer $win
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set xpos 5
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set cfg($win,y) 5
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#Draw global expand/contract button, if needed
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if {[string length $cfg($win,/:subgroups)] && $cfg($win,expandall)} {
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set exp 0
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foreach subgroup $cfg($win,/:subgroups) {incr exp $cfg($win,$subgroup:open)}
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if {$exp} {set type collapse} {set type expand}
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set ocimg [$win create image 1 1 -image [eval list \$::tktree::img$type] -anchor w]
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$win bind $ocimg <1> [list ::tktree::switchlayer $win [expr ! $exp]]
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}
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#Build the layers and set initial selection
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buildlayer $win / $xpos
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$win config -scrollregion [$win bbox all]
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setselection $win $cfg($win,selection)
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}
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#### internal use - set up a handle to build the tree when everything is idle
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proc ::tktree::buildwhenidle {win} {
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catch {after cancel $::tktree::cfg($win,buildHandle)}
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set ::tktree::cfg($win,buildHandle) [after idle [list ::tktree::buildtree $win]]
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}
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#### will create a new tree widget at the given path
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proc ::tktree::treecreate {win args} {
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variable cfg
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#Default configuration for new tree
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set cfg($win,selection) {}
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set cfg($win,selidx) {}
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set cfg($win,/:subgroups) {}
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set cfg($win,/:children) {}
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set cfg($win,/:open) 1
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set cfg($win,images) 1
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set cfg($win,expandall) 1
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set cfg($win,linecolor) black
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set cfg($win,textcolor) black
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set cfg($win,font) {-family Helvetica -size 10}
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#Parse and setup custom configuration options
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set canvascfg ""
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foreach {item val} $args {
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switch -- $item {
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-linecolor {set cfg($win,linecolor) $val}
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-textcolor {set cfg($win,textcolor) $val}
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-font {set cfg($win,font) $val}
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-images {set cfg($win,images) $val}
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-expandall {set cfg($win,expandall) $val}
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default {lappend canvascfg $item $val}
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}
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}
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#Build the canvas
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eval {canvas $win -takefocus 1} $canvascfg
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bind $win <Destroy> [list ::tktree::delitem $win /]
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bind $win <1> [list focus $win]
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bind $win <Return> {eval $::tktree::cfg(%W,[::tktree::getselection %W]:command)}
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bind $win <space> {eval $::tktree::cfg(%W,[::tktree::getselection %W]:command)}
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bind $win <Up> [list ::tktree::updown $win 0]
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bind $win <Down> [list ::tktree::updown $win 1]
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bind $win <Left> [list ::tktree::leftright $win 0]
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bind $win <Right> [list ::tktree::leftright $win 1]
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#Build the tree when idle
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buildwhenidle $win
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}
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}
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