FM / demos

/usr/share/tk8.6/demos

Name	Size	Mode	Actions
images/	-	0755	rm
anilabel.tcl	6670	0644	edit dl rm
aniwave.tcl	3494	0644	edit dl rm
arrow.tcl	7984	0644	edit dl rm
bind.tcl	2948	0644	edit dl rm
bitmap.tcl	1411	0644	edit dl rm
browse	1758	0755	edit dl rm
button.tcl	1504	0644	edit dl rm
check.tcl	2278	0644	edit dl rm
clrpick.tcl	1431	0644	edit dl rm
colors.tcl	4995	0644	edit dl rm
combo.tcl	1963	0644	edit dl rm
cscroll.tcl	3389	0644	edit dl rm
ctext.tcl	6019	0644	edit dl rm
dialog1.tcl	660	0644	edit dl rm
dialog2.tcl	613	0644	edit dl rm
en.msg	3867	0644	edit dl rm
entry1.tcl	1385	0644	edit dl rm
entry2.tcl	2081	0644	edit dl rm
entry3.tcl	6104	0644	edit dl rm
filebox.tcl	2351	0644	edit dl rm
floor.tcl	79108	0644	edit dl rm
fontchoose.tcl	1752	0644	edit dl rm
form.tcl	1046	0644	edit dl rm
goldberg.tcl	56556	0644	edit dl rm
hello	512	0755	edit dl rm
hscale.tcl	1497	0644	edit dl rm
icon.tcl	2063	0644	edit dl rm
image1.tcl	1002	0644	edit dl rm
image2.tcl	3352	0644	edit dl rm
items.tcl	10133	0644	edit dl rm
ixset	8068	0755	edit dl rm
knightstour.tcl	9140	0644	edit dl rm
label.tcl	1379	0644	edit dl rm
labelframe.tcl	1847	0644	edit dl rm
license.terms	2267	0644	edit dl rm
mclist.tcl	4357	0644	edit dl rm
menu.tcl	6778	0644	edit dl rm
menubu.tcl	4476	0644	edit dl rm
msgbox.tcl	1998	0644	edit dl rm
nl.msg	6750	0644	edit dl rm
paned1.tcl	1110	0644	edit dl rm
paned2.tcl	2244	0644	edit dl rm
pendulum.tcl	7596	0644	edit dl rm
plot.tcl	2758	0644	edit dl rm
puzzle.tcl	2596	0644	edit dl rm
radio.tcl	2752	0644	edit dl rm
README	2082	0644	edit dl rm
rmt	5319	0755	edit dl rm
rolodex	8300	0755	edit dl rm
ruler.tcl	5211	0644	edit dl rm
sayings.tcl	2273	0644	edit dl rm
search.tcl	4403	0644	edit dl rm
spin.tcl	1820	0644	edit dl rm
states.tcl	2048	0644	edit dl rm
style.tcl	6943	0644	edit dl rm
tclIndex	4354	0644	edit dl rm
tcolor	11250	0755	edit dl rm
text.tcl	4267	0644	edit dl rm
textpeer.tcl	2188	0644	edit dl rm
timer	1095	0755	edit dl rm
toolbar.tcl	3264	0644	edit dl rm
tree.tcl	3162	0644	edit dl rm
ttkbut.tcl	3405	0644	edit dl rm
ttkmenu.tcl	2391	0644	edit dl rm
ttknote.tcl	2317	0644	edit dl rm
ttkpane.tcl	4172	0644	edit dl rm
ttkprogress.tcl	1536	0644	edit dl rm
ttkscale.tcl	1420	0644	edit dl rm
twind.tcl	11045	0644	edit dl rm
unicodeout.tcl	4399	0644	edit dl rm
vscale.tcl	1477	0644	edit dl rm
widget	23267	0755	edit dl rm

Edit: /usr/share/tk8.6/demos/arrow.tcl (7984B)

# arrow.tcl --
#
# This demonstration script creates a canvas widget that displays a
# large line with an arrowhead whose shape can be edited interactively.

if {![info exists widgetDemo]} {
    error "This script should be run from the \"widget\" demo."
}

package require Tk

# arrowSetup --
# This procedure regenerates all the text and graphics in the canvas
# window.  It's called when the canvas is initially created, and also
# whenever any of the parameters of the arrow head are changed
# interactively.
#
# Arguments:
# c -		Name of the canvas widget.

proc arrowSetup c {
    upvar #0 demo_arrowInfo v

# Remember the current box, if there is one.

set tags [$c gettags current]
    if {$tags != ""} {
	set cur [lindex $tags [lsearch -glob $tags box?]]
    } else {
	set cur ""
    }

# Create the arrow and outline.

$c delete all
    eval {$c create line $v(x1) $v(y) $v(x2) $v(y)  -arrow last \
	    -width [expr {10*$v(width)}] -arrowshape [list \
	    [expr {10*$v(a)}] [expr {10*$v(b)}] [expr {10*$v(c)}]]} \
	    $v(bigLineStyle)
    set xtip [expr {$v(x2)-10*$v(b)}]
    set deltaY [expr {10*$v(c)+5*$v(width)}]
    $c create line $v(x2) $v(y) $xtip [expr {$v(y)+$deltaY}] \
	    [expr {$v(x2)-10*$v(a)}] $v(y) $xtip [expr {$v(y)-$deltaY}] \
	    $v(x2) $v(y) -width 2 -capstyle round -joinstyle round

# Create the boxes for reshaping the line and arrowhead.

eval {$c create rect [expr {$v(x2)-10*$v(a)-5}] [expr {$v(y)-5}] \
	    [expr {$v(x2)-10*$v(a)+5}] [expr {$v(y)+5}] \
	    -tags {box1 box}} $v(boxStyle)
    eval {$c create rect [expr {$xtip-5}] [expr {$v(y)-$deltaY-5}] \
	    [expr {$xtip+5}] [expr {$v(y)-$deltaY+5}] \
	    -tags {box2 box}} $v(boxStyle)
    eval {$c create rect [expr {$v(x1)-5}] [expr {$v(y)-5*$v(width)-5}] \
	    [expr {$v(x1)+5}] [expr {$v(y)-5*$v(width)+5}] \
	    -tags {box3 box}} $v(boxStyle)
    if {$cur != ""} {
	eval $c itemconfigure $cur $v(activeStyle)
    }

# Create three arrows in actual size with the same parameters

$c create line [expr {$v(x2)+50}] 0 [expr {$v(x2)+50}] 1000 \
	    -width 2
    set tmp [expr {$v(x2)+100}]
    $c create line $tmp [expr {$v(y)-125}] $tmp [expr {$v(y)-75}] \
	    -width $v(width) \
	    -arrow both -arrowshape "$v(a) $v(b) $v(c)"
    $c create line [expr {$tmp-25}] $v(y) [expr {$tmp+25}] $v(y) \
	    -width $v(width) \
	    -arrow both -arrowshape "$v(a) $v(b) $v(c)"
    $c create line [expr {$tmp-25}] [expr {$v(y)+75}] [expr {$tmp+25}] \
	    [expr {$v(y)+125}] -width $v(width) \
	    -arrow both -arrowshape "$v(a) $v(b) $v(c)"

# Create a bunch of other arrows and text items showing the
    # current dimensions.

set tmp [expr {$v(x2)+10}]
    $c create line $tmp [expr {$v(y)-5*$v(width)}] \
	    $tmp [expr {$v(y)-$deltaY}] \
	    -arrow both -arrowshape $v(smallTips)
    $c create text [expr {$v(x2)+15}] [expr {$v(y)-$deltaY+5*$v(c)}] \
	    -text $v(c) -anchor w
    set tmp [expr {$v(x1)-10}]
    $c create line $tmp [expr {$v(y)-5*$v(width)}] \
	    $tmp [expr {$v(y)+5*$v(width)}] \
	    -arrow both -arrowshape $v(smallTips)
    $c create text [expr {$v(x1)-15}] $v(y) -text $v(width) -anchor e
    set tmp [expr {$v(y)+5*$v(width)+10*$v(c)+10}]
    $c create line [expr {$v(x2)-10*$v(a)}] $tmp $v(x2) $tmp \
	    -arrow both -arrowshape $v(smallTips)
    $c create text [expr {$v(x2)-5*$v(a)}] [expr {$tmp+5}] \
	    -text $v(a) -anchor n
    set tmp [expr {$tmp+25}]
    $c create line [expr {$v(x2)-10*$v(b)}] $tmp $v(x2) $tmp \
	    -arrow both -arrowshape $v(smallTips)
    $c create text [expr {$v(x2)-5*$v(b)}] [expr {$tmp+5}] \
	    -text $v(b) -anchor n

$c create text $v(x1) 310 -text "-width  $v(width)" \
	    -anchor w -font {Helvetica 18}
    $c create text $v(x1) 330 -text "-arrowshape  {$v(a)  $v(b)  $v(c)}" \
	    -anchor w -font {Helvetica 18}

incr v(count)
}

set w .arrow
catch {destroy $w}
toplevel $w
wm title $w "Arrowhead Editor Demonstration"
wm iconname $w "arrow"
positionWindow $w
set c $w.c

label $w.msg -font $font -wraplength 5i -justify left -text "This widget allows you to experiment with different widths and arrowhead shapes for lines in canvases.  To change the line width or the shape of the arrowhead, drag any of the three boxes attached to the oversized arrow.  The arrows on the right give examples at normal scale.  The text at the bottom shows the configuration options as you'd enter them for a canvas line item."
pack $w.msg -side top

## See Code / Dismiss buttons
set btns [addSeeDismiss $w.buttons $w]
pack $btns -side bottom -fill x

canvas $c -width 500 -height 350 -relief sunken -borderwidth 2
pack $c -expand yes -fill both

set demo_arrowInfo(a) 8
set demo_arrowInfo(b) 10
set demo_arrowInfo(c) 3
set demo_arrowInfo(width) 2
set demo_arrowInfo(motionProc) arrowMoveNull
set demo_arrowInfo(x1) 40
set demo_arrowInfo(x2) 350
set demo_arrowInfo(y) 150
set demo_arrowInfo(smallTips) {5 5 2}
set demo_arrowInfo(count) 0
if {[winfo depth $c] > 1} {
    set demo_arrowInfo(bigLineStyle) "-fill SkyBlue1"
    set demo_arrowInfo(boxStyle) "-fill {} -outline black -width 1"
    set demo_arrowInfo(activeStyle) "-fill red -outline black -width 1"
} else {
    # Main widget program sets variable tk_demoDirectory
    set demo_arrowInfo(bigLineStyle) "-fill black \
	-stipple @[file join $tk_demoDirectory images grey.25]"
    set demo_arrowInfo(boxStyle) "-fill {} -outline black -width 1"
    set demo_arrowInfo(activeStyle) "-fill black -outline black -width 1"
}
arrowSetup $c
$c bind box <Enter> "$c itemconfigure current $demo_arrowInfo(activeStyle)"
$c bind box <Leave> "$c itemconfigure current $demo_arrowInfo(boxStyle)"
$c bind box <B1-Enter> " "
$c bind box <B1-Leave> " "
$c bind box1 <1> {set demo_arrowInfo(motionProc) arrowMove1}
$c bind box2 <1> {set demo_arrowInfo(motionProc) arrowMove2}
$c bind box3 <1> {set demo_arrowInfo(motionProc) arrowMove3}
$c bind box <B1-Motion> "\$demo_arrowInfo(motionProc) $c %x %y"
bind $c <Any-ButtonRelease-1> "arrowSetup $c"

# arrowMove1 --
# This procedure is called for each mouse motion event on box1 (the
# one at the vertex of the arrow).  It updates the controlling parameters
# for the line and arrowhead.
#
# Arguments:
# c -		The name of the canvas window.
# x, y -	The coordinates of the mouse.

proc arrowMove1 {c x y} {
    upvar #0 demo_arrowInfo v
    set newA [expr {($v(x2)+5-round([$c canvasx $x]))/10}]
    if {$newA < 0} {
	set newA 0
    }
    if {$newA > 25} {
	set newA 25
    }
    if {$newA != $v(a)} {
	$c move box1 [expr {10*($v(a)-$newA)}] 0
	set v(a) $newA
    }
}

# arrowMove2 --
# This procedure is called for each mouse motion event on box2 (the
# one at the trailing tip of the arrowhead).  It updates the controlling
# parameters for the line and arrowhead.
#
# Arguments:
# c -		The name of the canvas window.
# x, y -	The coordinates of the mouse.

proc arrowMove2 {c x y} {
    upvar #0 demo_arrowInfo v
    set newB [expr {($v(x2)+5-round([$c canvasx $x]))/10}]
    if {$newB < 0} {
	set newB 0
    }
    if {$newB > 25} {
	set newB 25
    }
    set newC [expr {($v(y)+5-round([$c canvasy $y])-5*$v(width))/10}]
    if {$newC < 0} {
	set newC 0
    }
    if {$newC > 20} {
	set newC 20
    }
    if {($newB != $v(b)) || ($newC != $v(c))} {
	$c move box2 [expr {10*($v(b)-$newB)}] [expr {10*($v(c)-$newC)}]
	set v(b) $newB
	set v(c) $newC
    }
}

# arrowMove3 --
# This procedure is called for each mouse motion event on box3 (the
# one that controls the thickness of the line).  It updates the
# controlling parameters for the line and arrowhead.
#
# Arguments:
# c -		The name of the canvas window.
# x, y -	The coordinates of the mouse.

proc arrowMove3 {c x y} {
    upvar #0 demo_arrowInfo v
    set newWidth [expr {($v(y)+2-round([$c canvasy $y]))/5}]
    if {$newWidth < 0} {
	set newWidth 0
    }
    if {$newWidth > 20} {
	set newWidth 20
    }
    if {$newWidth != $v(width)} {
	$c move box3 0 [expr {5*($v(width)-$newWidth)}]
	set v(width) $newWidth
    }
}

cmd: