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| Current File : //usr/share/tk8.5/panedwindow.tcl |
# panedwindow.tcl --
#
# This file defines the default bindings for Tk panedwindow widgets and
# provides procedures that help in implementing those bindings.
bind Panedwindow <Button-1> { ::tk::panedwindow::MarkSash %W %x %y 1 }
bind Panedwindow <Button-2> { ::tk::panedwindow::MarkSash %W %x %y 0 }
bind Panedwindow <B1-Motion> { ::tk::panedwindow::DragSash %W %x %y 1 }
bind Panedwindow <B2-Motion> { ::tk::panedwindow::DragSash %W %x %y 0 }
bind Panedwindow <ButtonRelease-1> {::tk::panedwindow::ReleaseSash %W 1}
bind Panedwindow <ButtonRelease-2> {::tk::panedwindow::ReleaseSash %W 0}
bind Panedwindow <Motion> { ::tk::panedwindow::Motion %W %x %y }
bind Panedwindow <Leave> { ::tk::panedwindow::Leave %W }
# Initialize namespace
namespace eval ::tk::panedwindow {}
# ::tk::panedwindow::MarkSash --
#
# Handle marking the correct sash for possible dragging
#
# Arguments:
# w the widget
# x widget local x coord
# y widget local y coord
# proxy whether this should be a proxy sash
# Results:
# None
#
proc ::tk::panedwindow::MarkSash {w x y proxy} {
variable ::tk::Priv
if {[$w cget -opaqueresize]} {
set proxy 0
}
set what [$w identify $x $y]
if { [llength $what] == 2 } {
lassign $what index which
if {!$::tk_strictMotif || $which eq "handle"} {
if {!$proxy} {
$w sash mark $index $x $y
}
set Priv(sash) $index
lassign [$w sash coord $index] sx sy
set Priv(dx) [expr {$sx-$x}]
set Priv(dy) [expr {$sy-$y}]
# Do this to init the proxy location
DragSash $w $x $y $proxy
}
}
}
# ::tk::panedwindow::DragSash --
#
# Handle dragging of the correct sash
#
# Arguments:
# w the widget
# x widget local x coord
# y widget local y coord
# proxy whether this should be a proxy sash
# Results:
# Moves sash
#
proc ::tk::panedwindow::DragSash {w x y proxy} {
variable ::tk::Priv
if {[$w cget -opaqueresize]} {
set proxy 0
}
if {[info exists Priv(sash)]} {
if {$proxy} {
$w proxy place [expr {$x+$Priv(dx)}] [expr {$y+$Priv(dy)}]
} else {
$w sash place $Priv(sash) \
[expr {$x+$Priv(dx)}] [expr {$y+$Priv(dy)}]
}
}
}
# ::tk::panedwindow::ReleaseSash --
#
# Handle releasing of the sash
#
# Arguments:
# w the widget
# proxy whether this should be a proxy sash
# Results:
# Returns ...
#
proc ::tk::panedwindow::ReleaseSash {w proxy} {
variable ::tk::Priv
if {[$w cget -opaqueresize]} {
set proxy 0
}
if {[info exists Priv(sash)]} {
if {$proxy} {
lassign [$w proxy coord] x y
$w sash place $Priv(sash) $x $y
$w proxy forget
}
unset Priv(sash) Priv(dx) Priv(dy)
}
}
# ::tk::panedwindow::Motion --
#
# Handle motion on the widget. This is used to change the cursor
# when the user moves over the sash area.
#
# Arguments:
# w the widget
# x widget local x coord
# y widget local y coord
# Results:
# May change the cursor. Sets up a timer to verify that we are still
# over the widget.
#
proc ::tk::panedwindow::Motion {w x y} {
variable ::tk::Priv
set id [$w identify $x $y]
if {([llength $id] == 2) && \
(!$::tk_strictMotif || [lindex $id 1] eq "handle")} {
if {![info exists Priv($w,panecursor)]} {
set Priv($w,panecursor) [$w cget -cursor]
if {[$w cget -sashcursor] ne ""} {
$w configure -cursor [$w cget -sashcursor]
} elseif {[$w cget -orient] eq "horizontal"} {
$w configure -cursor sb_h_double_arrow
} else {
$w configure -cursor sb_v_double_arrow
}
if {[info exists Priv($w,pwAfterId)]} {
after cancel $Priv($w,pwAfterId)
}
set Priv($w,pwAfterId) [after 150 \
[list ::tk::panedwindow::Cursor $w]]
}
return
}
if {[info exists Priv($w,panecursor)]} {
$w configure -cursor $Priv($w,panecursor)
unset Priv($w,panecursor)
}
}
# ::tk::panedwindow::Cursor --
#
# Handles returning the normal cursor when we are no longer over the
# sash area. This needs to be done this way, because the panedwindow
# won't see Leave events when the mouse moves from the sash to a
# paned child, although the child does receive an Enter event.
#
# Arguments:
# w the widget
# Results:
# May restore the default cursor, or schedule a timer to do it.
#
proc ::tk::panedwindow::Cursor {w} {
variable ::tk::Priv
# Make sure to check window existence in case it is destroyed.
if {[info exists Priv($w,panecursor)] && [winfo exists $w]} {
if {[winfo containing [winfo pointerx $w] [winfo pointery $w]] eq $w} {
set Priv($w,pwAfterId) [after 150 \
[list ::tk::panedwindow::Cursor $w]]
} else {
$w configure -cursor $Priv($w,panecursor)
unset Priv($w,panecursor)
if {[info exists Priv($w,pwAfterId)]} {
after cancel $Priv($w,pwAfterId)
unset Priv($w,pwAfterId)
}
}
}
}
# ::tk::panedwindow::Leave --
#
# Return to default cursor when leaving the pw widget.
#
# Arguments:
# w the widget
# Results:
# Restores the default cursor
#
proc ::tk::panedwindow::Leave {w} {
variable ::tk::Priv
if {[info exists Priv($w,panecursor)]} {
$w configure -cursor $Priv($w,panecursor)
unset Priv($w,panecursor)
}
}