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#
# $Id: sizegrip.tcl,v 1.1 2006/10/31 01:42:27 hobbs Exp $
#
# Ttk widget set -- sizegrip widget bindings.
#
# Dragging a sizegrip widget resizes the containing toplevel.
#
# NOTE: the sizegrip widget must be in the lower right hand corner.
#
option add *TSizegrip.cursor $::ttk::Cursors(seresize)
namespace eval ttk::sizegrip {
variable State
array set State {
pressed 0
pressX 0
pressY 0
width 0
height 0
widthInc 1
heightInc 1
toplevel {}
}
}
bind TSizegrip <ButtonPress-1> { ttk::sizegrip::Press %W %X %Y }
bind TSizegrip <B1-Motion> { ttk::sizegrip::Drag %W %X %Y }
bind TSizegrip <ButtonRelease-1> { ttk::sizegrip::Release %W %X %Y }
proc ttk::sizegrip::Press {W X Y} {
variable State
set top [winfo toplevel $W]
# Sanity-checks:
# If a negative X or Y position was specified for [wm geometry],
# just bail out -- there's no way to handle this cleanly.
#
if {[scan [wm geometry $top] "%dx%d+%d+%d" width height _x _y] != 4} {
return;
}
# Account for gridded geometry:
#
set grid [wm grid $top]
if {[llength $grid]} {
set State(widthInc) [lindex $grid 2]
set State(heightInc) [lindex $grid 3]
} else {
set State(widthInc) [set State(heightInc) 1]
}
set State(toplevel) $top
set State(pressX) $X
set State(pressY) $Y
set State(width) $width
set State(height) $height
set State(pressed) 1
}
proc ttk::sizegrip::Drag {W X Y} {
variable State
if {!$State(pressed)} { return }
set w [expr {$State(width) + ($X - $State(pressX))/$State(widthInc)}]
set h [expr {$State(height) + ($Y - $State(pressY))/$State(heightInc)}]
if {$w <= 0} { set w 1 }
if {$h <= 0} { set h 1 }
wm geometry $State(toplevel) ${w}x${h}
}
proc ttk::sizegrip::Release {W X Y} {
variable State
set State(pressed) 0
}
#*EOF*
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