| 1 | # ---------------------------------------------------------------------- |
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| 2 | # COMPONENT: hierlist - hierarchical list of elements |
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| 3 | # |
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| 4 | # This widget is similar to the BLT hierbox or treeview, but it |
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| 5 | # allows for embedded windows at each node. |
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| 6 | # ====================================================================== |
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| 7 | # AUTHOR: Michael McLennan, Purdue University |
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| 8 | # Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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| 9 | # |
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| 10 | # See the file "license.terms" for information on usage and |
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| 11 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 12 | # ====================================================================== |
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| 13 | package require Itk |
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| 14 | package require BLT |
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| 15 | |
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| 16 | option add *Hierlist.width 2i widgetDefault |
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| 17 | option add *Hierlist.height 3i widgetDefault |
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| 18 | option add *Hierlist.indent 20 widgetDefault |
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| 19 | option add *Hierlist.icon {treepl treemn} widgetDefault |
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| 20 | option add *Hierlist.selectBackground cyan widgetDefault |
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| 21 | option add *Hierlist.dropLineColor blue widgetDefault |
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| 22 | option add *Hierlist.font {helvetica -12} widgetDefault |
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| 23 | |
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| 24 | itcl::class Rappture::Hierlist { |
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| 25 | inherit itk::Widget Rappture::Dragdrop |
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| 26 | |
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| 27 | itk_option define -indent indent Indent 10 |
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| 28 | itk_option define -padding padding Padding 4 |
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| 29 | itk_option define -icon icon Icon "" |
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| 30 | itk_option define -font font Font "" |
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| 31 | itk_option define -title title Title "%type: %id" |
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| 32 | itk_option define -selectbackground selectBackground Foreground "" |
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| 33 | itk_option define -droplinecolor dropLineColor Foreground "" |
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| 34 | |
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| 35 | constructor {args} { # defined below } |
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| 36 | destructor { # defined below } |
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| 37 | |
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| 38 | public method tree {option args} |
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| 39 | public method select {what {how "-notify"}} |
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| 40 | public method curselection {args} |
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| 41 | public method toggle {what} |
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| 42 | |
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| 43 | public method xview {args} { eval $itk_component(area) xview $args } |
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| 44 | public method yview {args} { eval $itk_component(area) yview $args } |
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| 45 | |
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| 46 | protected method _redraw {args} |
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| 47 | protected method _redrawChildren {node indent ypos} |
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| 48 | protected method _edit {option node field args} |
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| 49 | |
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| 50 | # define these for drag-n-drop support of items |
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| 51 | protected method dd_get_source {widget x y} |
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| 52 | protected method dd_scan_target {x y data} |
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| 53 | protected method dd_finalize {option args} |
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| 54 | |
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| 55 | private variable _dispatcher "" ;# dispatcher for !events |
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| 56 | private variable _tree "" ;# BLT tree object for node data |
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| 57 | private variable _current "" ;# current selected node |
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| 58 | private variable _droppos "" ;# node index for dragdrop target pos |
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| 59 | private variable _imh ;# open/close images |
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| 60 | } |
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| 61 | |
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| 62 | itk::usual Hierlist { |
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| 63 | keep -cursor -font -foreground -background |
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| 64 | } |
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| 65 | |
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| 66 | # ---------------------------------------------------------------------- |
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| 67 | # CONSTRUCTOR |
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| 68 | # ---------------------------------------------------------------------- |
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| 69 | itcl::body Rappture::Hierlist::constructor {args} { |
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| 70 | itk_option add hull.width hull.height |
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| 71 | pack propagate $itk_component(hull) off |
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| 72 | |
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| 73 | # create a dispatcher for events |
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| 74 | Rappture::dispatcher _dispatcher |
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| 75 | $_dispatcher register !redraw |
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| 76 | $_dispatcher dispatch $this !redraw [itcl::code $this _redraw] |
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| 77 | |
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| 78 | # create a root node |
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| 79 | set _tree [blt::tree create] |
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| 80 | $_tree set 0 terminal yes ;# so you can't drop at the top level |
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| 81 | |
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| 82 | itk_component add area { |
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| 83 | canvas $itk_interior.area -highlightthickness 0 |
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| 84 | } { |
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| 85 | usual |
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| 86 | ignore -borderwidth -relief |
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| 87 | ignore -highlightthickness -highlightbackground -highlightcolor |
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| 88 | keep -xscrollcommand -yscrollcommand |
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| 89 | } |
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| 90 | pack $itk_component(area) -expand yes -fill both |
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| 91 | |
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| 92 | # this widget exports nodes via drag-n-drop |
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| 93 | dragdrop source $itk_component(area) |
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| 94 | |
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| 95 | set _imh(open) [image create photo] |
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| 96 | set _imh(close) [image create photo] |
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| 97 | |
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| 98 | eval itk_initialize $args |
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| 99 | } |
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| 100 | |
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| 101 | # ---------------------------------------------------------------------- |
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| 102 | # DESTRUCTOR |
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| 103 | # ---------------------------------------------------------------------- |
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| 104 | itcl::body Rappture::Hierlist::destructor {} { |
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| 105 | foreach name [array names _imh] { |
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| 106 | image delete $_imh($name) |
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| 107 | } |
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| 108 | blt::tree destroy $_tree |
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| 109 | } |
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| 110 | |
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| 111 | # ---------------------------------------------------------------------- |
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| 112 | # USAGE: tree insert <node> <pos> ?<field1> <val1> <field2> <val2> ...? |
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| 113 | # USAGE: tree delete ?<node> <node> ...? |
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| 114 | # USAGE: tree get <node> <field> |
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| 115 | # USAGE: tree set <node> <field> <value> |
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| 116 | # USAGE: tree path <node> ?<pattern>? |
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| 117 | # USAGE: tree children <node> |
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| 118 | # |
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| 119 | # Clients use this to manipulate items in the tree being displayed |
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| 120 | # within the widget. Each <node> is an integer node number in the |
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| 121 | # underlying BLT tree object. The root node is node 0. Each node |
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| 122 | # has a series of <field>'s with values. The fields are used for the |
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| 123 | # -title of each node, and the "terminal" field controls whether or |
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| 124 | # not a node can have children added. |
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| 125 | # ---------------------------------------------------------------------- |
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| 126 | itcl::body Rappture::Hierlist::tree {option args} { |
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| 127 | switch -- $option { |
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| 128 | insert { |
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| 129 | set node [lindex $args 0] |
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| 130 | set pos [lindex $args 1] |
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| 131 | if {$pos == "end"} {set pos [llength [$_tree children $node]]} |
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| 132 | set args [lrange $args 2 end] |
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| 133 | set newnode [$_tree insert $node -at $pos -data [eval list open yes terminal yes dragdrop yes $args]] |
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| 134 | |
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| 135 | # make sure we fix up the layout at some point |
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| 136 | $_dispatcher event -idle !redraw |
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| 137 | |
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| 138 | return $newnode |
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| 139 | } |
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| 140 | delete { |
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| 141 | if {$args == "all"} { |
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| 142 | $_tree delete 0 |
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| 143 | } else { |
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| 144 | foreach node $args { |
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| 145 | $_tree delete $node |
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| 146 | } |
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| 147 | } |
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| 148 | |
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| 149 | # make sure we fix up the layout at some point |
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| 150 | $_dispatcher event -idle !redraw |
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| 151 | } |
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| 152 | get { |
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| 153 | return [eval $_tree get $args] |
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| 154 | } |
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| 155 | set { |
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| 156 | # changed an option -- may be %type or %id -- update display |
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| 157 | $_dispatcher event -idle !redraw |
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| 158 | |
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| 159 | return [eval $_tree set $args] |
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| 160 | } |
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| 161 | path { |
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| 162 | if {[llength $args] < 1 || [llength $args] > 2} { |
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| 163 | error "wrong # args: should be \"tree path node ?pattern?\"" |
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| 164 | } |
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| 165 | set node [lindex $args 0] |
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| 166 | set pattern [lindex $args 1] |
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| 167 | if {$pattern == ""} { set pattern %id } |
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| 168 | |
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| 169 | set path "" |
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| 170 | while {$node > 0} { |
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| 171 | catch {unset info} |
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| 172 | foreach {name val} [$_tree get $node] { |
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| 173 | set info(%$name) $val |
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| 174 | set info(%lc:$name) [string tolower $val] |
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| 175 | set info(%uc:$name) [string toupper $val] |
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| 176 | } |
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| 177 | set name [string map [array get info] $pattern] |
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| 178 | set path "$name.$path" |
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| 179 | set node [$_tree parent $node] |
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| 180 | } |
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| 181 | return [string trimright $path .] |
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| 182 | } |
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| 183 | children { |
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| 184 | set node [lindex $args 0] |
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| 185 | return [$_tree children $node] |
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| 186 | } |
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| 187 | default { |
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| 188 | error "bad option \"$option\": should be insert, delete, get, set, path, children" |
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| 189 | } |
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| 190 | } |
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| 191 | } |
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| 192 | |
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| 193 | # ---------------------------------------------------------------------- |
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| 194 | # USAGE: select <what> ?-notify|-silent? |
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| 195 | # |
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| 196 | # Called when you click on an item to select it. Highlights the item |
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| 197 | # and returns information about it for the curselection. This normally |
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| 198 | # triggers a <<Selection>> event on the widget, but that is suppressed |
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| 199 | # if the -silent option is given. |
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| 200 | # ---------------------------------------------------------------------- |
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| 201 | itcl::body Rappture::Hierlist::select {what {how "-notify"}} { |
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| 202 | set c $itk_component(area) |
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| 203 | if {$what == "none"} { |
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| 204 | set what "" |
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| 205 | } |
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| 206 | set same [string equal $what $_current] |
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| 207 | |
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| 208 | if {"" != $_current} { |
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| 209 | # clear any current selection |
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| 210 | $c itemconfigure item:$_current-bg -fill "" |
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| 211 | set _current "" |
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| 212 | } |
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| 213 | |
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| 214 | if {"" != $what} { |
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| 215 | $c itemconfigure item:$what-bg -fill $itk_option(-selectbackground) |
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| 216 | set _current $what |
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| 217 | } |
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| 218 | |
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| 219 | if {!$same && ![string equal $how "-silent"]} { |
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| 220 | # selection changed? then tell clients |
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| 221 | event generate $itk_component(hull) <<Selection>> |
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| 222 | } |
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| 223 | } |
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| 224 | |
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| 225 | # ---------------------------------------------------------------------- |
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| 226 | # USAGE: curselection |
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| 227 | # USAGE: curselection -path <string> |
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| 228 | # USAGE: curselection -field <name> |
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| 229 | # |
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| 230 | # Returns information about the current selection. Returns "" if |
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| 231 | # there is no selection. If "-field <name>" is specified, then it |
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| 232 | # returns the value of that field for the current selection. If |
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| 233 | # the "-path <string>" is specified, then it returns the path to |
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| 234 | # the current node, using <string> as a pattern for each node name |
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| 235 | # and filling in any %field items for each node. With no extra args, |
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| 236 | # it returns the node number from the underlying BLT tree. |
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| 237 | # ---------------------------------------------------------------------- |
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| 238 | itcl::body Rappture::Hierlist::curselection {args} { |
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| 239 | if {"" == $_current} { |
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| 240 | return "" |
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| 241 | } |
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| 242 | |
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| 243 | if {[llength $args] == 0} { |
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| 244 | return $_current |
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| 245 | |
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| 246 | } elseif {[llength $args] == 2} { |
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| 247 | switch -- [lindex $args 0] { |
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| 248 | -path { |
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| 249 | set pattern [lindex $args 1] |
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| 250 | return [tree path $_current $pattern] |
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| 251 | } |
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| 252 | -field { |
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| 253 | return [$_tree get $_current [lindex $args 1]] |
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| 254 | } |
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| 255 | default { |
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| 256 | error "bad option \"[lindex $args 0]\": should be -field, -path" |
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| 257 | } |
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| 258 | } |
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| 259 | } else { |
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| 260 | error "wrong # args: should be \"curselection ?-path str? ?-field name?\"" |
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| 261 | } |
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| 262 | } |
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| 263 | |
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| 264 | # ---------------------------------------------------------------------- |
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| 265 | # USAGE: toggle <what> |
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| 266 | # |
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| 267 | # Called when you click on an item to select it. Highlights the item |
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| 268 | # and returns information about it for the curselection. |
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| 269 | # ---------------------------------------------------------------------- |
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| 270 | itcl::body Rappture::Hierlist::toggle {what} { |
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| 271 | set flipped [expr {![$_tree get $what open]}] |
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| 272 | $_tree set $what open $flipped |
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| 273 | $_dispatcher event -idle !redraw |
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| 274 | } |
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| 275 | |
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| 276 | # ---------------------------------------------------------------------- |
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| 277 | # USAGE: _redraw ?<eventArgs>...? |
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| 278 | # |
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| 279 | # Used internally to redraw all items in the hierarchy after the |
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| 280 | # tree has changed somehow. |
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| 281 | # ---------------------------------------------------------------------- |
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| 282 | itcl::body Rappture::Hierlist::_redraw {args} { |
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| 283 | set c $itk_component(area) |
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| 284 | $c delete all |
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| 285 | |
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| 286 | set lineht [font metrics $itk_option(-font) -linespace] |
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| 287 | set ypos [expr {0.5*$lineht + $itk_option(-padding)}] |
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| 288 | _redrawChildren 0 0 ypos |
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| 289 | |
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| 290 | foreach {x0 y0 x1 y1} [$c bbox text] break |
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| 291 | $c configure -scrollregion [list 0 0 [expr {$x1+10}] [expr {$y1+10}]] |
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| 292 | |
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| 293 | # did a selected node get folded up when the parent closed? |
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| 294 | if {"" == [$c find withtag selected]} { |
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| 295 | select none |
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| 296 | } |
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| 297 | } |
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| 298 | |
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| 299 | # ---------------------------------------------------------------------- |
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| 300 | # USAGE: _redrawChildren <node> <indent> <yposVar> |
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| 301 | # |
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| 302 | # Used internally to redraw all items in the hierarchy after the |
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| 303 | # tree has changed somehow. |
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| 304 | # ---------------------------------------------------------------------- |
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| 305 | itcl::body Rappture::Hierlist::_redrawChildren {node indent yposVar} { |
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| 306 | set c $itk_component(area) |
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| 307 | upvar $yposVar ypos |
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| 308 | |
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| 309 | set xmid [expr {$indent + $itk_option(-indent)/2}] |
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| 310 | set xtxt [expr {$indent + $itk_option(-indent)}] |
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| 311 | set lineht [font metrics $itk_option(-font) -linespace] |
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| 312 | |
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| 313 | foreach n [$_tree children $node] { |
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| 314 | # background rectangle for selection highlight |
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| 315 | set tlist [list item:$n item:$n-bg] |
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| 316 | if {[string equal $n $_current]} { |
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| 317 | set bg $itk_option(-selectbackground) |
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| 318 | lappend tlist selected |
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| 319 | } else { |
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| 320 | set bg "" |
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| 321 | } |
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| 322 | $c create rect 0 [expr {$ypos-0.5*$lineht-1}] 1000 [expr {$ypos+0.5*$lineht+1}] -outline "" -fill $bg -tags $tlist |
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| 323 | |
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| 324 | $c bind item:$n <ButtonRelease> [itcl::code $this select $n] |
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| 325 | |
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| 326 | # +/- button for expanding the hierarchy |
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| 327 | if {![$_tree get $n terminal]} { |
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| 328 | if {[$_tree get $n open]} { |
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| 329 | set imh $_imh(open) |
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| 330 | } else { |
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| 331 | set imh $_imh(close) |
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| 332 | } |
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| 333 | $c create image $xmid $ypos -anchor c -image $imh -tags plus:$n |
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| 334 | $c bind plus:$n <ButtonPress> [itcl::code $this toggle $n] |
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| 335 | } |
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| 336 | |
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| 337 | # label for this node |
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| 338 | catch {unset data} |
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| 339 | array set data [$_tree get $n] |
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| 340 | set xpos $xtxt |
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| 341 | |
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| 342 | set subs(%type) "" |
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| 343 | set subs(%id) "" |
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| 344 | foreach {name val} [$_tree get $n] { |
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| 345 | set subs(%$name) $val |
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| 346 | set subs(%lc:$name) [string tolower $val] |
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| 347 | set subs(%uc:$name) [string toupper $val] |
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| 348 | } |
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| 349 | |
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| 350 | set str [string map [array get subs] $itk_option(-title)] |
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| 351 | $c create text $xpos $ypos -anchor w -text $str -font $itk_option(-font) -tags [list text item:$n item:$n-text] |
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| 352 | |
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| 353 | set ypos [expr {$ypos+$lineht+$itk_option(-padding)}] |
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| 354 | |
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| 355 | # indent and draw all children |
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| 356 | if {![$_tree get $n terminal] && [$_tree get $n open]} { |
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| 357 | # if this node has children, draw them here |
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| 358 | _redrawChildren $n $xtxt ypos |
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| 359 | } |
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| 360 | } |
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| 361 | } |
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| 362 | |
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| 363 | # ---------------------------------------------------------------------- |
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| 364 | # USAGE: dd_get_source <widget> <x> <y> |
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| 365 | # |
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| 366 | # Looks at the given <widget> and <x>,<y> coordinate to figure out |
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| 367 | # what data value the source is exporting. Returns a string that |
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| 368 | # identifies the type of the data. This string is passed along to |
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| 369 | # targets via the dd_scan_target method. If the target may check |
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| 370 | # the source type and reject the data. |
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| 371 | # ---------------------------------------------------------------------- |
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| 372 | itcl::body Rappture::Hierlist::dd_get_source {widget x y} { |
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| 373 | # convert from screen coords to canvas coords (for scrollbars) |
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| 374 | set x [$widget canvasx $x] |
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| 375 | set y [$widget canvasy $y] |
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| 376 | |
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| 377 | set data "" |
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| 378 | foreach id [$widget find overlapping $x $y $x $y] { |
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| 379 | foreach tag [$widget gettags $id] { |
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| 380 | # search for a tag like item:NNN and make sure it's selected |
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| 381 | if {[regexp {^item:([0-9]+)$} $tag match node] |
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| 382 | && $node == $_current} { |
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| 383 | |
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| 384 | # some nodes have drag-n-drop turned off |
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| 385 | if {[$_tree get $node dragdrop]} { |
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| 386 | set data [list node:$node [$_tree get $node]] |
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| 387 | } |
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| 388 | break |
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| 389 | } |
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| 390 | } |
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| 391 | } |
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| 392 | # return drag-n-drop data, if we found it |
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| 393 | return $data |
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| 394 | } |
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| 395 | |
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| 396 | # ---------------------------------------------------------------------- |
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| 397 | # USAGE: dd_scan_target <x> <y> <data> |
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| 398 | # |
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| 399 | # Looks at the given <x>,<y> coordinate and checks to see if the |
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| 400 | # dragdrop <data> can be accepted at that point. Returns 1 if so, |
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| 401 | # and 0 if the data is rejected. |
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| 402 | # ---------------------------------------------------------------------- |
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| 403 | itcl::body Rappture::Hierlist::dd_scan_target {x y data} { |
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| 404 | set c $itk_component(area) |
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| 405 | set _droppos "" ;# assume no place to drop |
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| 406 | |
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| 407 | switch -glob -- $data { |
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| 408 | node:* { |
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| 409 | # convert from screen coords to canvas coords (for scrollbars) |
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| 410 | set x [$c canvasx $x] |
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| 411 | set y [$c canvasy $y] |
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| 412 | |
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| 413 | # search a little above the hot-spot |
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| 414 | set y [expr {$y-5}] |
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| 415 | |
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| 416 | foreach id [$c find overlapping $x $y $x $y] { |
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| 417 | foreach tag [$c gettags $id] { |
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| 418 | if {[regexp {^item:([0-9]+)$} $tag match node]} { |
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| 419 | # draw the dropline beneath the item found |
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| 420 | if {"" == [$c find withtag dropline]} { |
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| 421 | $c create line 0 0 0 0 \ |
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| 422 | -fill $itk_option(-droplinecolor) -tags dropline |
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| 423 | } |
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| 424 | |
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| 425 | foreach {x0 y0 x1 y1} [$c bbox item:$node-bg] break |
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| 426 | if {![$_tree get $node terminal]} { |
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| 427 | # drop on a node with children |
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| 428 | if {$y > $y0 + 0.6*($y1-$y0)} { |
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| 429 | # drop near the bottom -- insert as first child |
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| 430 | set _droppos "$node -at 0" |
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| 431 | set d [$_tree depth $node] |
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| 432 | set x0 [expr {($d+1)*$itk_option(-indent)}] |
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| 433 | $c coords dropline $x0 $y1 $x1 $y1 |
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| 434 | } else { |
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| 435 | # drop on top -- insert as last child |
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| 436 | set x0 [expr {$x0+1}] |
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| 437 | set x1 [expr {[winfo width $c]-1}] |
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| 438 | $c coords dropline $x0 $y0 $x1 $y0 $x1 $y1 $x0 $y1 $x0 $y0 |
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| 439 | set last [llength [$_tree children $node]] |
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| 440 | set _droppos "$node -at $last" |
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| 441 | } |
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| 442 | } else { |
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| 443 | set pnode [$_tree parent $node] |
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| 444 | if {![$_tree get $pnode terminal]} { |
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| 445 | set pos [expr {[$_tree position $node]+1}] |
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| 446 | set _droppos "$pnode -at $pos" |
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| 447 | set d [$_tree depth $node] |
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| 448 | set x0 [expr {$d*$itk_option(-indent)}] |
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| 449 | $c coords dropline $x0 $y1 $x1 $y1 |
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| 450 | } |
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| 451 | } |
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| 452 | |
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| 453 | break |
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| 454 | } |
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| 455 | } |
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| 456 | } |
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| 457 | if {"" != $_droppos} { |
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| 458 | return 1 |
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| 459 | } |
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| 460 | $c coords dropline -1 -1 -1 -1 |
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| 461 | return 0 |
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| 462 | } |
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| 463 | } |
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| 464 | return 0 |
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| 465 | } |
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| 466 | |
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| 467 | # ---------------------------------------------------------------------- |
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| 468 | # USAGE: dd_finalize drop -op start|end -from <w> -to <w> \ |
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| 469 | # -x <x> -y <y> -data <data> |
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| 470 | # USAGE: dd_finalize cancel |
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| 471 | # |
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| 472 | # Handles the end of a drag and drop operation. The operation can be |
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| 473 | # completed with a successful drop of data, or cancelled. |
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| 474 | # ---------------------------------------------------------------------- |
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| 475 | itcl::body Rappture::Hierlist::dd_finalize {option args} { |
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| 476 | $itk_component(area) delete dropline |
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| 477 | |
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| 478 | if {$option == "drop" && "" != $_droppos} { |
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| 479 | array set params $args |
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| 480 | switch -glob -- $params(-data) { |
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| 481 | node:* { |
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| 482 | if {$params(-op) == "end" |
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| 483 | && [string equal $params(-from) $params(-to)]} { |
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| 484 | |
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| 485 | regexp {node:([0-9]+)} $params(-data) match node |
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| 486 | eval $_tree move $node $_droppos |
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| 487 | event generate $itk_component(hull) <<SelectionPath>> |
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| 488 | } else { |
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| 489 | set dlist [list open yes terminal yes dragdrop yes] |
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| 490 | eval lappend dlist [lrange $params(-data) 1 end] |
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| 491 | eval $_tree insert $_droppos -data [list $dlist] |
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| 492 | } |
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| 493 | # make sure the parent is open so we can see this node |
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| 494 | set parent [lindex $_droppos 0] |
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| 495 | if {![$_tree get $parent open]} { |
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| 496 | $_tree set $parent open 1 |
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| 497 | } |
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| 498 | |
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| 499 | $_dispatcher event -idle !redraw |
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| 500 | return 1 |
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| 501 | } |
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| 502 | } |
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| 503 | return 0 |
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| 504 | } |
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| 505 | } |
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| 506 | |
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| 507 | # ---------------------------------------------------------------------- |
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| 508 | # CONFIGURATION OPTION: -icon |
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| 509 | # ---------------------------------------------------------------------- |
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| 510 | itcl::configbody Rappture::Hierlist::icon { |
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| 511 | set imh0 [lindex $itk_option(-icon) 0] |
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| 512 | set imh1 [lindex $itk_option(-icon) 1] |
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| 513 | if {$imh1 == ""} { set imh1 $imh0 } |
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| 514 | |
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| 515 | set imh0 [Rappture::icon $imh0] |
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| 516 | if {$imh0 == ""} { |
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| 517 | $_imh(open) configure -width 1 -height 1 |
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| 518 | $_imh(open) blank |
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| 519 | } else { |
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| 520 | $_imh(open) configure -width [image width $imh0] -height [image height $imh0] |
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| 521 | $_imh(open) copy $imh0 |
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| 522 | } |
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| 523 | |
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| 524 | set imh1 [Rappture::icon $imh1] |
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| 525 | if {$imh1 == ""} { |
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| 526 | $_imh(close) configure -width 1 -height 1 |
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| 527 | $_imh(close) blank |
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| 528 | } else { |
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| 529 | $_imh(close) configure -width [image width $imh1] -height [image height $imh1] |
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| 530 | $_imh(close) copy $imh1 |
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| 531 | } |
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| 532 | } |
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| 533 | |
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| 534 | # ---------------------------------------------------------------------- |
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| 535 | # CONFIGURATION OPTION: -selectbackground |
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| 536 | # ---------------------------------------------------------------------- |
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| 537 | itcl::configbody Rappture::Hierlist::selectbackground { |
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| 538 | $itk_component(area) itemconfigure select \ |
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| 539 | -background $itk_option(-selectbackground) |
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| 540 | } |
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