晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //proc/thread-self/root/usr/share/tk8.6/ttk/sizegrip.tcl
#
# Sizegrip widget bindings.
#
# Dragging a sizegrip widget resizes the containing toplevel.
#
# NOTE: the sizegrip widget must be in the lower right hand corner.
#

switch -- [tk windowingsystem] {
    x11 -
    win32 {
	option add *TSizegrip.cursor [ttk::cursor seresize]
    }
    aqua {
    	# Aqua sizegrips use default Arrow cursor.
    }
}

namespace eval ttk::sizegrip {
    variable State
    array set State {
	pressed 	0
	pressX 		0
	pressY 		0
	width 		0
	height 		0
	widthInc	1
	heightInc	1
        resizeX         1
        resizeY         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

    if {[$W instate disabled]} { return }

    set top [winfo toplevel $W]

    # If the toplevel is not resizable then bail
    foreach {State(resizeX) State(resizeY)} [wm resizable $top] break
    if {!$State(resizeX) && !$State(resizeY)} {
        return
    }

    # 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(x)      $x
    set State(y)      $y
    set State(pressed) 1
}

proc ttk::sizegrip::Drag {W X Y} {
    variable State
    if {!$State(pressed)} { return }
    set w $State(width)
    set h $State(height)
    if {$State(resizeX)} {
        set w [expr {$w + ($X - $State(pressX))/$State(widthInc)}]
    }
    if {$State(resizeY)} {
        set h [expr {$h + ($Y - $State(pressY))/$State(heightInc)}]
    }
    if {$w <= 0} { set w 1 }
    if {$h <= 0} { set h 1 }
    set x $State(x) ; set y $State(y)
    wm geometry $State(toplevel) ${w}x${h}+${x}+${y}
}

proc ttk::sizegrip::Release {W X Y} {
    variable State
    set State(pressed) 0
}

#*EOF*

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