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File ruler.tcl

# ruler.tcl --
#
# This demonstration script creates a canvas widget that displays a ruler
# with tab stops that can be set, moved, and deleted.

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

package require Tk

# rulerMkTab --
# This procedure creates a new triangular polygon in a canvas to
# represent a tab stop.
#
# Arguments:
# c -		The canvas window.
# x, y -	Coordinates at which to create the tab stop.

proc rulerMkTab {c x y} {
    upvar #0 demo_rulerInfo v
    $c create polygon $x $y [expr {$x+$v(size)}] [expr {$y+$v(size)}] \
	    [expr {$x-$v(size)}] [expr {$y+$v(size)}]
}

set w .ruler
catch {destroy $w}
toplevel $w
wm title $w "Ruler Demonstration"
wm iconname $w "ruler"
positionWindow $w
set c $w.c

label $w.msg -font $font -wraplength 5i -justify left -text "This canvas widget shows a mock-up of a ruler.  You can create tab stops by dragging them out of the well to the right of the ruler.  You can also drag existing tab stops.  If you drag a tab stop far enough up or down so that it turns dim, it will be deleted when you release the mouse button."
pack $w.msg -side top

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

canvas $c -width 14.8c -height 2.5c
pack $w.c -side top -fill x

set demo_rulerInfo(grid) .25c
set demo_rulerInfo(left) [winfo fpixels $c 1c]
set demo_rulerInfo(right) [winfo fpixels $c 13c]
set demo_rulerInfo(top) [winfo fpixels $c 1c]
set demo_rulerInfo(bottom) [winfo fpixels $c 1.5c]
set demo_rulerInfo(size) [winfo fpixels $c .2c]
set demo_rulerInfo(normalStyle) "-fill black"
# Main widget program sets variable tk_demoDirectory
if {[winfo depth $c] > 1} {
    set demo_rulerInfo(activeStyle) "-fill red -stipple {}"
    set demo_rulerInfo(deleteStyle) [list -fill red \
	    -stipple @[file join $tk_demoDirectory images gray25.xbm]]
} else {
    set demo_rulerInfo(activeStyle) "-fill black -stipple {}"
    set demo_rulerInfo(deleteStyle) [list -fill black \
	    -stipple @[file join $tk_demoDirectory images gray25.xbm]]
}

$c create line 1c 0.5c 1c 1c 13c 1c 13c 0.5c -width 1
for {set i 0} {$i < 12} {incr i} {
    set x [expr {$i+1}]
    $c create line ${x}c 1c ${x}c 0.6c -width 1
    $c create line $x.25c 1c $x.25c 0.8c -width 1
    $c create line $x.5c 1c $x.5c 0.7c -width 1
    $c create line $x.75c 1c $x.75c 0.8c -width 1
    $c create text $x.15c .75c -text $i -anchor sw
}
$c addtag well withtag [$c create rect 13.2c 1c 13.8c 0.5c \
	-outline black -fill [lindex [$c config -bg] 4]]
$c addtag well withtag [rulerMkTab $c [winfo pixels $c 13.5c] \
	[winfo pixels $c .65c]]

$c bind well <1> "rulerNewTab $c %x %y"
$c bind tab <1> "rulerSelectTab $c %x %y"
bind $c <B1-Motion> "rulerMoveTab $c %x %y"
bind $c <Any-ButtonRelease-1> "rulerReleaseTab $c"

# rulerNewTab --
# Does all the work of creating a tab stop, including creating the
# triangle object and adding tags to it to give it tab behavior.
#
# Arguments:
# c -		The canvas window.
# x, y -	The coordinates of the tab stop.

proc rulerNewTab {c x y} {
    upvar #0 demo_rulerInfo v
    $c addtag active withtag [rulerMkTab $c $x $y]
    $c addtag tab withtag active
    set v(x) $x
    set v(y) $y
    rulerMoveTab $c $x $y
}

# rulerSelectTab --
# This procedure is invoked when mouse button 1 is pressed over
# a tab.  It remembers information about the tab so that it can
# be dragged interactively.
#
# Arguments:
# c -		The canvas widget.
# x, y -	The coordinates of the mouse (identifies the point by
#		which the tab was picked up for dragging).

proc rulerSelectTab {c x y} {
    upvar #0 demo_rulerInfo v
    set v(x) [$c canvasx $x $v(grid)]
    set v(y) [expr {$v(top)+2}]
    $c addtag active withtag current
    eval "$c itemconf active $v(activeStyle)"
    $c raise active
}

# rulerMoveTab --
# This procedure is invoked during mouse motion events to drag a tab.
# It adjusts the position of the tab, and changes its appearance if
# it is about to be dragged out of the ruler.
#
# Arguments:
# c -		The canvas widget.
# x, y -	The coordinates of the mouse.

proc rulerMoveTab {c x y} {
    upvar #0 demo_rulerInfo v
    if {[$c find withtag active] == ""} {
	return
    }
    set cx [$c canvasx $x $v(grid)]
    set cy [$c canvasy $y]
    if {$cx < $v(left)} {
	set cx $v(left)
    }
    if {$cx > $v(right)} {
	set cx $v(right)
    }
    if {($cy >= $v(top)) && ($cy <= $v(bottom))} {
	set cy [expr {$v(top)+2}]
	eval "$c itemconf active $v(activeStyle)"
    } else {
	set cy [expr {$cy-$v(size)-2}]
	eval "$c itemconf active $v(deleteStyle)"
    }
    $c move active [expr {$cx-$v(x)}] [expr {$cy-$v(y)}]
    set v(x) $cx
    set v(y) $cy
}

# rulerReleaseTab --
# This procedure is invoked during button release events that end
# a tab drag operation.  It deselects the tab and deletes the tab if
# it was dragged out of the ruler.
#
# Arguments:
# c -		The canvas widget.
# x, y -	The coordinates of the mouse.

proc rulerReleaseTab c {
    upvar #0 demo_rulerInfo v
    if {[$c find withtag active] == {}} {
	return
    }
    if {$v(y) != $v(top)+2} {
	$c delete active
    } else {
	eval "$c itemconf active $v(normalStyle)"
	$c dtag active
    }
}

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2024-03-13 04:40:23
..	DIR	-	drwxr-xr-x	2024-03-13 04:40:23
images	DIR	-	drwxr-xr-x	2024-03-13 04:40:23
README	text/plain	2.03 KB	-rw-r--r--	2019-10-16 05:25:12
anilabel.tcl	text/plain	6.51 KB	-rw-r--r--	2019-10-16 05:25:12
aniwave.tcl	text/plain	3.41 KB	-rw-r--r--	2019-10-16 05:25:12
arrow.tcl	text/plain	7.8 KB	-rw-r--r--	2019-10-16 05:25:12
bind.tcl	text/plain	2.88 KB	-rw-r--r--	2019-10-16 05:25:12
bitmap.tcl	text/plain	1.38 KB	-rw-r--r--	2019-10-16 05:25:12
browse	text/x-shellscript	1.72 KB	-rwxr-xr-x	2019-10-16 05:25:12
button.tcl	text/plain	1.47 KB	-rw-r--r--	2019-10-16 05:25:12
check.tcl	text/plain	2.22 KB	-rw-r--r--	2019-10-16 05:25:12
clrpick.tcl	text/plain	1.4 KB	-rw-r--r--	2019-10-16 05:25:12
colors.tcl	text/plain	4.88 KB	-rw-r--r--	2019-10-16 05:25:12
combo.tcl	text/plain	1.92 KB	-rw-r--r--	2019-10-16 05:25:12
cscroll.tcl	text/plain	3.31 KB	-rw-r--r--	2019-10-16 05:25:12
ctext.tcl	text/plain	5.88 KB	-rw-r--r--	2019-10-16 05:25:12
dialog1.tcl	text/plain	660 B	-rw-r--r--	2019-10-16 05:25:12
dialog2.tcl	text/plain	613 B	-rw-r--r--	2019-10-16 05:25:12
en.msg	text/plain	3.78 KB	-rw-r--r--	2019-10-16 05:25:12
entry1.tcl	text/plain	1.35 KB	-rw-r--r--	2019-10-16 05:25:12
entry2.tcl	text/plain	2.03 KB	-rw-r--r--	2019-10-16 05:25:12
entry3.tcl	text/plain	5.96 KB	-rw-r--r--	2019-10-16 05:25:12
filebox.tcl	text/plain	2.3 KB	-rw-r--r--	2019-10-16 05:25:12
floor.tcl	text/plain	77.25 KB	-rw-r--r--	2019-10-16 05:25:12
fontchoose.tcl	text/plain	1.71 KB	-rw-r--r--	2019-10-16 05:25:12
form.tcl	text/plain	1.02 KB	-rw-r--r--	2019-10-16 05:25:12
goldberg.tcl	text/plain	55.23 KB	-rw-r--r--	2019-10-16 05:25:12
hello	text/x-shellscript	512 B	-rwxr-xr-x	2019-10-16 05:25:12
hscale.tcl	text/plain	1.46 KB	-rw-r--r--	2019-10-16 05:25:12
icon.tcl	text/plain	2.01 KB	-rw-r--r--	2019-10-16 05:25:12
image1.tcl	text/plain	1002 B	-rw-r--r--	2019-10-16 05:25:12
image2.tcl	text/plain	3.27 KB	-rw-r--r--	2019-10-16 05:25:12
items.tcl	text/plain	9.9 KB	-rw-r--r--	2019-10-16 05:25:12
ixset	text/x-shellscript	7.88 KB	-rwxr-xr-x	2019-10-16 05:25:12
knightstour.tcl	text/plain	8.93 KB	-rw-r--r--	2019-10-16 05:25:12
label.tcl	text/plain	1.35 KB	-rw-r--r--	2019-10-16 05:25:12
labelframe.tcl	text/plain	1.8 KB	-rw-r--r--	2019-10-16 05:25:12
license.terms	text/plain	2.21 KB	-rw-r--r--	2019-10-16 05:25:12
mclist.tcl	text/plain	4.25 KB	-rw-r--r--	2019-10-16 05:25:12
menu.tcl	text/plain	6.62 KB	-rw-r--r--	2019-10-16 05:25:12
menubu.tcl	text/plain	4.37 KB	-rw-r--r--	2019-10-16 05:25:12
msgbox.tcl	text/plain	1.95 KB	-rw-r--r--	2019-10-16 05:25:12
nl.msg	text/plain	6.59 KB	-rw-r--r--	2019-10-16 05:25:12
paned1.tcl	text/plain	1.08 KB	-rw-r--r--	2019-10-16 05:25:12
paned2.tcl	text/plain	2.19 KB	-rw-r--r--	2019-10-16 05:25:12
pendulum.tcl	text/plain	7.42 KB	-rw-r--r--	2019-10-16 05:25:12
plot.tcl	text/plain	2.69 KB	-rw-r--r--	2019-10-16 05:25:12
puzzle.tcl	text/plain	2.54 KB	-rw-r--r--	2019-10-16 05:25:12
radio.tcl	text/plain	2.69 KB	-rw-r--r--	2019-10-16 05:25:12
rmt	text/x-shellscript	5.19 KB	-rwxr-xr-x	2019-10-16 05:25:12
rolodex	text/x-shellscript	8.11 KB	-rwxr-xr-x	2019-10-16 05:25:12
ruler.tcl	text/plain	5.09 KB	-rw-r--r--	2019-10-16 05:25:12
sayings.tcl	text/plain	2.22 KB	-rw-r--r--	2019-10-16 05:25:12
search.tcl	text/plain	4.3 KB	-rw-r--r--	2019-10-16 05:25:12
spin.tcl	text/plain	1.78 KB	-rw-r--r--	2019-10-16 05:25:12
states.tcl	text/plain	2 KB	-rw-r--r--	2019-10-16 05:25:12
style.tcl	text/plain	6.78 KB	-rw-r--r--	2019-10-16 05:25:12
tclIndex	text/plain	4.25 KB	-rw-r--r--	2019-10-16 05:25:12
tcolor	text/x-shellscript	10.99 KB	-rwxr-xr-x	2019-10-16 05:25:12
text.tcl	text/plain	4.17 KB	-rw-r--r--	2019-10-16 05:25:12
textpeer.tcl	text/plain	2.14 KB	-rw-r--r--	2019-10-16 05:25:12
timer	text/x-shellscript	1.07 KB	-rwxr-xr-x	2019-10-16 05:25:12
toolbar.tcl	text/plain	3.19 KB	-rw-r--r--	2019-10-16 05:25:12
tree.tcl	text/plain	3.09 KB	-rw-r--r--	2019-10-16 05:25:12
ttkbut.tcl	text/plain	3.33 KB	-rw-r--r--	2019-10-16 05:25:12
ttkmenu.tcl	text/plain	2.33 KB	-rw-r--r--	2019-10-16 05:25:12
ttknote.tcl	text/plain	2.26 KB	-rw-r--r--	2019-10-16 05:25:12
ttkpane.tcl	text/plain	4.07 KB	-rw-r--r--	2019-10-16 05:25:12
ttkprogress.tcl	text/plain	1.5 KB	-rw-r--r--	2019-10-16 05:25:12
ttkscale.tcl	text/plain	1.39 KB	-rw-r--r--	2019-10-16 05:25:12
twind.tcl	text/plain	10.79 KB	-rw-r--r--	2019-10-16 05:25:12
unicodeout.tcl	text/plain	4.3 KB	-rw-r--r--	2019-10-16 05:25:12
vscale.tcl	text/plain	1.44 KB	-rw-r--r--	2019-10-16 05:25:12
widget	text/x-shellscript	22.72 KB	-rwxr-xr-x	2019-10-16 05:25:12

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