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# -*- mode: TCL; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
#
# $Id: VResize.tcl,v 1.3 2004/03/28 02:44:57 hobbs Exp $
#
# VResize.tcl --
#
# tixVResize:
# Virtual base class for all classes that provide resize capability,
# such as the resize handle and the MDI client window.
#
# Copyright (c) 1993-1999 Ioi Kim Lam.
# Copyright (c) 2000-2001 Tix Project Group.
# Copyright (c) 2004 ActiveState
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
tixWidgetClass tixVResize {
-virtual true
-classname TixVResize
-superclass tixPrimitive
-method {
drag dragend dragstart
}
-flag {
-gridded -gridx -gridy -minwidth -minheight
}
-configspec {
{-gridded gridded Gridded false}
{-gridx gridX Grid 10}
{-gridy gridY Grid 10}
{-minwidth minWidth MinWidth 0}
{-minheight minHeight MinHeight 0}
}
}
proc tixVResize:InitWidgetRec {w} {
upvar #0 $w data
tixChainMethod $w InitWidgetRec
set data(movePending) 0
set data(aborted) 0
set data(depress) 0
}
#----------------------------------------------------------------------
# Public methods
#----------------------------------------------------------------------
# Start dragging a window
#
proc tixVResize:dragstart {w win depress rootx rooty wrect mrect} {
upvar #0 $w data
set data(rootx) $rootx
set data(rooty) $rooty
set data(mx) [lindex $mrect 0]
set data(my) [lindex $mrect 1]
set data(mw) [lindex $mrect 2]
set data(mh) [lindex $mrect 3]
set data(fx) [lindex $wrect 0]
set data(fy) [lindex $wrect 1]
set data(fw) [lindex $wrect 2]
set data(fh) [lindex $wrect 3]
set data(old_x) [lindex $wrect 0]
set data(old_y) [lindex $wrect 1]
set data(old_w) [lindex $wrect 2]
set data(old_h) [lindex $wrect 3]
if {$data(mw) < 0} {
set data(maxx) [expr {$data(fx) + $data(old_w) - $data(-minwidth)}]
} else {
set data(maxx) 32000
}
if {$data(mh) < 0} {
set data(maxy) [expr {$data(fy) + $data(old_h) - $data(-minheight)}]
} else {
set data(maxy) 32000
}
set data(aborted) 0
tixCallMethod $w ShowHintFrame
tixCallMethod $w SetHintFrame $data(fx) $data(fy) $data(fw) $data(fh)
# Grab so that all button events are captured
#
grab $win
focus $win
set data(depress) $depress
if {$depress} {
set data(oldRelief) [$win cget -relief]
$win config -relief sunken
}
}
proc tixVResize:drag {w rootx rooty} {
upvar #0 $w data
if {$data(aborted) == 0} {
set data(newrootx) $rootx
set data(newrooty) $rooty
if {$data(movePending) == 0} {
set data(movePending) 1
after 2 tixVResize:DragCompressed $w
}
}
}
proc tixVResize:dragend {w win isAbort rootx rooty} {
upvar #0 $w data
if {$data(aborted)} {
if {$isAbort == 0} {
grab release $win
}
return
}
# Just in case some draggings are not applied.
#
update
tixCallMethod $w HideHintFrame
if {$isAbort} {
set data(aborted) 1
} else {
# Apply the changes
#
tixCallMethod $w UpdateSize $data(fx) $data(fy) $data(fw) $data(fh)
# Release the grab
#
grab release $win
}
if {$data(depress)} {
$win config -relief $data(oldRelief)
}
}
#----------------------------------------------------------------------
# Internal methods
#----------------------------------------------------------------------
proc tixVResize:DragCompressed {w} {
if {![winfo exists $w]} {
return
}
upvar #0 $w data
if {$data(aborted) == 1 || $data(movePending) == 0} {
return
}
set dx [expr {$data(newrootx) - $data(rootx)}]
set dy [expr {$data(newrooty) - $data(rooty)}]
set data(fx) [expr {$data(old_x) + ($dx * $data(mx))}]
set data(fy) [expr {$data(old_y) + ($dy * $data(my))}]
set data(fw) [expr {$data(old_w) + ($dx * $data(mw))}]
set data(fh) [expr {$data(old_h) + ($dy * $data(mh))}]
if {$data(fw) < $data(-minwidth)} {
set data(fw) $data(-minwidth)
}
if {$data(fh) < $data(-minheight)} {
set data(fh) $data(-minheight)
}
if {$data(fx) > $data(maxx)} {
set data(fx) $data(maxx)
}
if {$data(fy) > $data(maxy)} {
set data(fy) $data(maxy)
}
# If we need grid, set x,y,w,h to fit the grid
#
# *note* grid overrides minwidth and maxwidth ...
#
if {$data(-gridded)} {
set data(fx) [expr {round(double($data(fx))/$data(-gridx)) * $data(-gridx)}]
set data(fy) [expr {round(double($data(fy))/$data(-gridy)) * $data(-gridy)}]
set fx2 [expr {$data(fx) + $data(fw) - 2}]
set fy2 [expr {$data(fy) + $data(fh) - 2}]
set fx2 [expr {round(double($fx2)/$data(-gridx)) * $data(-gridx)}]
set fy2 [expr {round(double($fy2)/$data(-gridy)) * $data(-gridy)}]
set data(fw) [expr {$fx2 - $data(fx) + 1}]
set data(fh) [expr {$fy2 - $data(fy) + 1}]
}
tixCallMethod $w SetHintFrame $data(fx) $data(fy) $data(fw) $data(fh)
update idletasks
set data(movePending) 0
}