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364 lines
8.7 KiB
364 lines
8.7 KiB
#
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# ttk::treeview widget bindings and utilities.
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#
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namespace eval ttk::treeview {
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variable State
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# Enter/Leave/Motion
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#
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set State(activeWidget) {}
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set State(activeHeading) {}
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# Press/drag/release:
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#
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set State(pressMode) none
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set State(pressX) 0
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# For pressMode == "resize"
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set State(resizeColumn) #0
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# For pressmode == "heading"
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set State(heading) {}
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}
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### Widget bindings.
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#
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bind Treeview <Motion> { ttk::treeview::Motion %W %x %y }
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bind Treeview <B1-Leave> { #nothing }
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bind Treeview <Leave> { ttk::treeview::ActivateHeading {} {}}
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bind Treeview <ButtonPress-1> { ttk::treeview::Press %W %x %y }
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bind Treeview <Double-ButtonPress-1> { ttk::treeview::DoubleClick %W %x %y }
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bind Treeview <ButtonRelease-1> { ttk::treeview::Release %W %x %y }
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bind Treeview <B1-Motion> { ttk::treeview::Drag %W %x %y }
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bind Treeview <KeyPress-Up> { ttk::treeview::Keynav %W up }
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bind Treeview <KeyPress-Down> { ttk::treeview::Keynav %W down }
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bind Treeview <KeyPress-Right> { ttk::treeview::Keynav %W right }
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bind Treeview <KeyPress-Left> { ttk::treeview::Keynav %W left }
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bind Treeview <KeyPress-Prior> { %W yview scroll -1 pages }
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bind Treeview <KeyPress-Next> { %W yview scroll 1 pages }
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bind Treeview <KeyPress-Return> { ttk::treeview::ToggleFocus %W }
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bind Treeview <KeyPress-space> { ttk::treeview::ToggleFocus %W }
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bind Treeview <Shift-ButtonPress-1> \
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{ ttk::treeview::Select %W %x %y extend }
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bind Treeview <<ToggleSelection>> \
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{ ttk::treeview::Select %W %x %y toggle }
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ttk::copyBindings TtkScrollable Treeview
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### Binding procedures.
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#
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## Keynav -- Keyboard navigation
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#
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# @@@ TODO: verify/rewrite up and down code.
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#
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proc ttk::treeview::Keynav {w dir} {
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set focus [$w focus]
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if {$focus eq ""} { return }
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switch -- $dir {
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up {
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if {[set up [$w prev $focus]] eq ""} {
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set focus [$w parent $focus]
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} else {
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while {[$w item $up -open] && [llength [$w children $up]]} {
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set up [lindex [$w children $up] end]
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}
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set focus $up
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}
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}
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down {
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if {[$w item $focus -open] && [llength [$w children $focus]]} {
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set focus [lindex [$w children $focus] 0]
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} else {
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set up $focus
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while {$up ne "" && [set down [$w next $up]] eq ""} {
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set up [$w parent $up]
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}
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set focus $down
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}
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}
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left {
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if {[$w item $focus -open] && [llength [$w children $focus]]} {
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CloseItem $w $focus
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} else {
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set focus [$w parent $focus]
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}
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}
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right {
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OpenItem $w $focus
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}
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}
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if {$focus != {}} {
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SelectOp $w $focus choose
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}
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}
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## Motion -- pointer motion binding.
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# Sets cursor, active element ...
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#
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proc ttk::treeview::Motion {w x y} {
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set cursor {}
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set activeHeading {}
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switch -- [$w identify region $x $y] {
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separator { set cursor hresize }
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heading { set activeHeading [$w identify column $x $y] }
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}
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ttk::setCursor $w $cursor
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ActivateHeading $w $activeHeading
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}
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## ActivateHeading -- track active heading element
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#
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proc ttk::treeview::ActivateHeading {w heading} {
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variable State
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if {$w != $State(activeWidget) || $heading != $State(activeHeading)} {
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if {$State(activeHeading) != {}} {
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$State(activeWidget) heading $State(activeHeading) state !active
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}
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if {$heading != {}} {
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$w heading $heading state active
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}
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set State(activeHeading) $heading
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set State(activeWidget) $w
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}
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}
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## Select $w $x $y $selectop
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# Binding procedure for selection operations.
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# See "Selection modes", below.
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#
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proc ttk::treeview::Select {w x y op} {
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if {[set item [$w identify row $x $y]] ne "" } {
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SelectOp $w $item $op
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}
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}
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## DoubleClick -- Double-ButtonPress-1 binding.
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#
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proc ttk::treeview::DoubleClick {w x y} {
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if {[set row [$w identify row $x $y]] ne ""} {
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Toggle $w $row
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} else {
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Press $w $x $y ;# perform single-click action
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}
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}
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## Press -- ButtonPress binding.
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#
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proc ttk::treeview::Press {w x y} {
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focus $w
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switch -- [$w identify region $x $y] {
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nothing { }
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heading { heading.press $w $x $y }
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separator { resize.press $w $x $y }
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tree -
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cell {
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set item [$w identify item $x $y]
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SelectOp $w $item choose
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switch -glob -- [$w identify element $x $y] {
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*indicator -
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*disclosure { Toggle $w $item }
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}
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}
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}
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}
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## Drag -- B1-Motion binding
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#
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proc ttk::treeview::Drag {w x y} {
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variable State
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switch $State(pressMode) {
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resize { resize.drag $w $x }
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heading { heading.drag $w $x $y }
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}
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}
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proc ttk::treeview::Release {w x y} {
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variable State
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switch $State(pressMode) {
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resize { resize.release $w $x }
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heading { heading.release $w }
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}
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set State(pressMode) none
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Motion $w $x $y
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}
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### Interactive column resizing.
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#
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proc ttk::treeview::resize.press {w x y} {
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variable State
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set State(pressMode) "resize"
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set State(resizeColumn) [$w identify column $x $y]
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}
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proc ttk::treeview::resize.drag {w x} {
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variable State
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$w drag $State(resizeColumn) $x
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}
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proc ttk::treeview::resize.release {w x} {
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# no-op
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}
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### Heading activation.
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#
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proc ttk::treeview::heading.press {w x y} {
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variable State
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set column [$w identify column $x $y]
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set State(pressMode) "heading"
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set State(heading) $column
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$w heading $column state pressed
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}
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proc ttk::treeview::heading.drag {w x y} {
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variable State
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if { [$w identify region $x $y] eq "heading"
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&& [$w identify column $x $y] eq $State(heading)
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} {
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$w heading $State(heading) state pressed
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} else {
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$w heading $State(heading) state !pressed
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}
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}
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proc ttk::treeview::heading.release {w} {
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variable State
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if {[lsearch -exact [$w heading $State(heading) state] pressed] >= 0} {
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after 0 [$w heading $State(heading) -command]
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}
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$w heading $State(heading) state !pressed
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}
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### Selection modes.
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#
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## SelectOp $w $item [ choose | extend | toggle ] --
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# Dispatch to appropriate selection operation
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# depending on current value of -selectmode.
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#
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proc ttk::treeview::SelectOp {w item op} {
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select.$op.[$w cget -selectmode] $w $item
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}
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## -selectmode none:
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#
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proc ttk::treeview::select.choose.none {w item} { $w focus $item }
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proc ttk::treeview::select.toggle.none {w item} { $w focus $item }
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proc ttk::treeview::select.extend.none {w item} { $w focus $item }
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## -selectmode browse:
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#
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proc ttk::treeview::select.choose.browse {w item} { BrowseTo $w $item }
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proc ttk::treeview::select.toggle.browse {w item} { BrowseTo $w $item }
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proc ttk::treeview::select.extend.browse {w item} { BrowseTo $w $item }
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## -selectmode multiple:
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#
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proc ttk::treeview::select.choose.extended {w item} {
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BrowseTo $w $item
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}
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proc ttk::treeview::select.toggle.extended {w item} {
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$w selection toggle [list $item]
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}
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proc ttk::treeview::select.extend.extended {w item} {
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if {[set anchor [$w focus]] ne ""} {
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$w selection set [between $w $anchor $item]
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} else {
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BrowseTo $w $item
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}
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}
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### Tree structure utilities.
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#
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## between $tv $item1 $item2 --
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# Returns a list of all items between $item1 and $item2,
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# in preorder traversal order. $item1 and $item2 may be
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# in either order.
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#
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# NOTES:
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# This routine is O(N) in the size of the tree.
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# There's probably a way to do this that's O(N) in the number
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# of items returned, but I'm not clever enough to figure it out.
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#
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proc ttk::treeview::between {tv item1 item2} {
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variable between [list]
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variable selectingBetween 0
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ScanBetween $tv $item1 $item2 {}
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return $between
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}
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## ScanBetween --
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# Recursive worker routine for ttk::treeview::between
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#
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proc ttk::treeview::ScanBetween {tv item1 item2 item} {
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variable between
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variable selectingBetween
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if {$item eq $item1 || $item eq $item2} {
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lappend between $item
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set selectingBetween [expr {!$selectingBetween}]
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} elseif {$selectingBetween} {
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lappend between $item
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}
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foreach child [$tv children $item] {
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ScanBetween $tv $item1 $item2 $child
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}
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}
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### User interaction utilities.
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#
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## OpenItem, CloseItem -- Set the open state of an item, generate event
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#
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proc ttk::treeview::OpenItem {w item} {
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$w focus $item
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event generate $w <<TreeviewOpen>>
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$w item $item -open true
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}
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proc ttk::treeview::CloseItem {w item} {
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$w item $item -open false
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$w focus $item
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event generate $w <<TreeviewClose>>
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}
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## Toggle -- toggle opened/closed state of item
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#
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proc ttk::treeview::Toggle {w item} {
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if {[$w item $item -open]} {
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CloseItem $w $item
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} else {
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OpenItem $w $item
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}
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}
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## ToggleFocus -- toggle opened/closed state of focus item
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#
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proc ttk::treeview::ToggleFocus {w} {
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set item [$w focus]
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if {$item ne ""} {
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Toggle $w $item
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}
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}
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## BrowseTo -- navigate to specified item; set focus and selection
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#
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proc ttk::treeview::BrowseTo {w item} {
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$w see $item
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$w focus $item
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$w selection set [list $item]
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}
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#*EOF*
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