#
# Demo: Layout
#
proc DemoLayout {} {

	set T .f2.f1.t

	$T configure -showroot no -showrootbutton yes -showbuttons yes \
		-showlines yes -itemheight 0 -selectmode browse

	$T column configure 0 -text Layout

	$T element create e1 rect -width 30 -height 30 -fill gray20
	$T element create e2 rect -width 30 -height 30 -fill gray40 \
		-outline blue -outlinewidth 3
	$T element create e3 rect -fill gray60
	$T element create e4 rect -fill [list $::SystemHighlight {selected focus} gray80 {}] \
		-showfocus yes
	$T element create e5 rect -fill {"sky blue"} -width 20 -height 20
	$T element create e6 rect -fill {"sea green"} -width 30 -height 16
	$T element create e7 rect -fill {"sky blue"} -width 30 -height 16
	$T element create e8 rect -fill gray70 -height 1

	set S [$T style create s1]
	$T style elements $S {e4 e3 e1 e2 e5 e6 e7}
	$T style layout $S e1 -padx {28 4} -pady 4
	$T style layout $S e2 -expand es -padx {0 38}
	$T style layout $S e3 -union [list e1 e2] -ipadx 4 -ipady 4 -pady 2
	$T style layout $S e4 -detach yes -iexpand es
	$T style layout $S e5 -detach yes -padx {2 0} -pady 2 -iexpand s
	$T style layout $S e6 -detach yes -expand ws -padx {0 2} -pady {2 0}
	$T style layout $S e7 -detach yes -expand wn -padx {0 2} -pady {0 2}

	set I [$T item create]
	$T item hasbutton $I yes
	$T item style set $I 0 $S
	$T item lastchild root $I
	set parent $I

	set I [$T item create]
	$T item hasbutton $I no
	$T item style set $I 0 $S
	$T item lastchild $parent $I

	###

	set S [$T style create s2]
	$T style elements $S {e4 e3 e1}
	$T style layout $S e1 -padx 8 -pady 8 -iexpand e
	$T style layout $S e3 -union e1 -ipadx {20 4} -ipady {4 12}
	$T style layout $S e4 -detach yes -iexpand es

	set I [$T item create]
	$T item hasbutton $I yes
	$T item style set $I 0 $S
	$T item lastchild root $I

	set I2 [$T item create]
	$T item hasbutton $I2 no
	$T item style set $I2 0 $S
	$T item lastchild $I $I2

	###

	set S [$T style create s3]
	$T style elements $S {e4 e3 e1 e5 e6}
	$T style layout $S e4 -union {e1 e6} -ipadx 8 -ipady {8 0}
	$T style layout $S e3 -union {e1 e5} -ipadx 4 -ipady 4
	$T style layout $S e5 -ipady {0 20}

	set I [$T item create]
	$T item hasbutton $I yes
	$T item style set $I 0 $S
	$T item lastchild root $I

	set I2 [$T item create]
	$T item hasbutton $I2 no
	$T item style set $I2 0 $S
	$T item lastchild $I $I2

	###

	$T element create eb border -background $::SystemButtonFace \
		-relief {sunken {selected} raised {}} -thickness 2 -filled yes
	$T element create et text

	set text "Here is a text element surrounded by a border element.\nResize the column to watch me wrap."

	set S [$T style create s4]
	$T style elements $S {eb et}
	$T style layout $S eb -union et -ipadx 2 -ipady 2
	$T style layout $S et -squeeze x

	set I [$T item create]
	$T item hasbutton $I yes
	$T item style set $I 0 $S
	$T item text $I 0 $text
	$T item lastchild root $I
	set parent $I

	set I [$T item create]
	$T item hasbutton $I no
	$T item style set $I 0 $S
	$T item text $I 0 $text
	$T item lastchild $parent $I

	###

	set styleNum 5
	foreach {orient expandList} {horizontal {s ns n} vertical {e we w}} {
		foreach expand $expandList {

			set S [$T style create s$styleNum -orient $orient]
			$T style elements $S {e4 e8 e2 e5 e6}
			$T style layout $S e4 -detach yes -iexpand es
			$T style layout $S e8 -detach yes -expand n -iexpand e
			$T style layout $S e2 -expand $expand
			$T style layout $S e5 -expand $expand
			$T style layout $S e6 -expand $expand
			incr styleNum

			set I [$T item create]
			$T item style set $I 0 $S
			$T item lastchild root $I
		}
	}

	return
}