+proc mkfontdisp {font top which} {
+ global fontattr fontpref $font
+
+ set fontpref($font) [set $font]
+ button $top.${font}but -text $which -font optionfont \
+ -command [list choosefont $font $which]
+ label $top.$font -relief flat -font $font \
+ -text $fontattr($font,family) -justify left
+ grid x $top.${font}but $top.$font -sticky w
+}
+
+proc choosefont {font which} {
+ global fontparam fontlist fonttop fontattr
+
+ set fontparam(which) $which
+ set fontparam(font) $font
+ set fontparam(family) [font actual $font -family]
+ set fontparam(size) $fontattr($font,size)
+ set fontparam(weight) $fontattr($font,weight)
+ set fontparam(slant) $fontattr($font,slant)
+ set top .gitkfont
+ set fonttop $top
+ if {![winfo exists $top]} {
+ font create sample
+ eval font config sample [font actual $font]
+ toplevel $top
+ wm title $top "Gitk font chooser"
+ label $top.l -textvariable fontparam(which) -font uifont
+ pack $top.l -side top
+ set fontlist [lsort [font families]]
+ frame $top.f
+ listbox $top.f.fam -listvariable fontlist \
+ -yscrollcommand [list $top.f.sb set]
+ bind $top.f.fam <<ListboxSelect>> selfontfam
+ scrollbar $top.f.sb -command [list $top.f.fam yview]
+ pack $top.f.sb -side right -fill y
+ pack $top.f.fam -side left -fill both -expand 1
+ pack $top.f -side top -fill both -expand 1
+ frame $top.g
+ spinbox $top.g.size -from 4 -to 40 -width 4 \
+ -textvariable fontparam(size) \
+ -validatecommand {string is integer -strict %s}
+ checkbutton $top.g.bold -padx 5 \
+ -font {{Times New Roman} 12 bold} -text "B" -indicatoron 0 \
+ -variable fontparam(weight) -onvalue bold -offvalue normal
+ checkbutton $top.g.ital -padx 5 \
+ -font {{Times New Roman} 12 italic} -text "I" -indicatoron 0 \
+ -variable fontparam(slant) -onvalue italic -offvalue roman
+ pack $top.g.size $top.g.bold $top.g.ital -side left
+ pack $top.g -side top
+ canvas $top.c -width 150 -height 50 -border 2 -relief sunk \
+ -background white
+ $top.c create text 100 25 -anchor center -text $which -font sample \
+ -fill black -tags text
+ bind $top.c <Configure> [list centertext $top.c]
+ pack $top.c -side top -fill x
+ frame $top.buts
+ button $top.buts.ok -text "OK" -command fontok -default active \
+ -font uifont
+ button $top.buts.can -text "Cancel" -command fontcan -default normal \
+ -font uifont
+ grid $top.buts.ok $top.buts.can
+ grid columnconfigure $top.buts 0 -weight 1 -uniform a
+ grid columnconfigure $top.buts 1 -weight 1 -uniform a
+ pack $top.buts -side bottom -fill x
+ trace add variable fontparam write chg_fontparam
+ } else {
+ raise $top
+ $top.c itemconf text -text $which
+ }
+ set i [lsearch -exact $fontlist $fontparam(family)]
+ if {$i >= 0} {
+ $top.f.fam selection set $i
+ $top.f.fam see $i
+ }
+}
+
+proc centertext {w} {
+ $w coords text [expr {[winfo width $w] / 2}] [expr {[winfo height $w] / 2}]
+}
+
+proc fontok {} {
+ global fontparam fontpref prefstop
+
+ set f $fontparam(font)
+ set fontpref($f) [list $fontparam(family) $fontparam(size)]
+ if {$fontparam(weight) eq "bold"} {
+ lappend fontpref($f) "bold"
+ }
+ if {$fontparam(slant) eq "italic"} {
+ lappend fontpref($f) "italic"
+ }
+ set w $prefstop.$f
+ $w conf -text $fontparam(family) -font $fontpref($f)
+
+ fontcan
+}
+
+proc fontcan {} {
+ global fonttop fontparam
+
+ if {[info exists fonttop]} {
+ catch {destroy $fonttop}
+ catch {font delete sample}
+ unset fonttop
+ unset fontparam
+ }
+}
+
+proc selfontfam {} {
+ global fonttop fontparam
+
+ set i [$fonttop.f.fam curselection]
+ if {$i ne {}} {
+ set fontparam(family) [$fonttop.f.fam get $i]
+ }
+}
+
+proc chg_fontparam {v sub op} {
+ global fontparam
+
+ font config sample -$sub $fontparam($sub)
+}
+