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#==============================================================================
# Main Scrollutil and Scrollutil_tile package module.
#
# Copyright (c) 2019-2022 Csaba Nemethi (E-mail: csaba.nemethi@t-online.de)
#==============================================================================
package require Tk 8
namespace eval ::scrollutil {
#
# Public variables:
#
variable version 1.17
variable library
if {$::tcl_version >= 8.4} {
set library [file dirname [file normalize [info script]]]
} else {
set library [file dirname [info script]] ;# no "file normalize" yet
}
#
# Creates a new scrollarea/scrollsync/scrollableframe/pagesman widget:
#
namespace export scrollarea scrollsync scrollableframe pagesman
#
# Queries the scrollarea/scrollsync to which a given widget belongs:
#
namespace export getscrollarea getscrollsync
#
# Public procedures for mouse wheel event handling in
# scrollable widgets and scrollable widget containers:
#
namespace export addMouseWheelSupport createWheelEventBindings \
enableScrollingByWheel disableScrollingByWheel \
adaptWheelEventHandling setFocusCheckWindow \
focusCheckWindow
}
package provide scrollutil::common $::scrollutil::version
#
# The following procedure, invoked in "scrollutil.tcl" and
# "scrollutil_tile.tcl", sets the variable ::scrollutil::usingTile to the given
# value and sets a trace on this variable.
#
proc ::scrollutil::useTile {bool} {
variable usingTile $bool
trace variable usingTile wu [list ::scrollutil::restoreUsingTile $bool]
}
#
# The following trace procedure is executed whenever the variable
# ::scrollutil::usingTile is written or unset. It restores the variable to its
# original value, given by the first argument.
#
proc ::scrollutil::restoreUsingTile {origVal varName index op} {
variable usingTile $origVal
switch $op {
w {
return -code error "it is not supported to use both Scrollutil and\
Scrollutil_tile in the same application"
}
u {
trace variable usingTile wu \
[list ::scrollutil::restoreUsingTile $origVal]
}
}
}
proc ::scrollutil::createTkAliases {} {
foreach cmd {frame scrollbar} {
if {[llength [info commands ::tk::$cmd]] == 0} {
interp alias {} ::tk::$cmd {} ::$cmd
}
}
}
::scrollutil::createTkAliases
#
# Everything else needed is lazily loaded on demand, via the dispatcher
# set up in the subdirectory "scripts" (see the file "tclIndex").
#
lappend auto_path [file join $::scrollutil::library scripts]
#
# Load the packages mwutil and scaleutil from the directory
# "scripts/utils". Take into account that mwutil is also included
# in Mentry and Tablelist, and scaleutil is also included in Tablelist.
#
proc ::scrollutil::loadUtils {} {
if {[catch {package present mwutil} version] == 0 && $version < 2.19} {
package forget mwutil
}
package require mwutil 2.19
if {[catch {package present scaleutil} version] == 0 && $version < 1.9} {
package forget scaleutil
}
package require scaleutil 1.9
}
::scrollutil::loadUtils
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