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📄 README(2.03 KB)
📄 anilabel.tcl(6.51 KB)
📄 aniwave.tcl(3.41 KB)
📄 arrow.tcl(7.8 KB)
📄 bind.tcl(2.87 KB)
📄 bitmap.tcl(1.38 KB)
📄 browse(1.72 KB)
📄 button.tcl(1.47 KB)
📄 check.tcl(2.22 KB)
📄 clrpick.tcl(1.4 KB)
📄 colors.tcl(4.88 KB)
📄 combo.tcl(1.94 KB)
📄 cscroll.tcl(3.31 KB)
📄 ctext.tcl(4.76 KB)
📄 dialog1.tcl(660 B)
📄 dialog2.tcl(613 B)
📄 en.msg(3.8 KB)
📄 entry1.tcl(1.35 KB)
📄 entry2.tcl(2.06 KB)
📄 entry3.tcl(5.95 KB)
📄 filebox.tcl(2.2 KB)
📄 floor.tcl(77.24 KB)
📄 form.tcl(1.02 KB)
📄 goldberg.tcl(55.23 KB)
📄 hello(512 B)
📄 hscale.tcl(1.46 KB)
📄 icon.tcl(2.01 KB)
📄 image1.tcl(1002 B)
📄 image2.tcl(3.28 KB)
📁 images
📄 items.tcl(9.5 KB)
📄 ixset(7.91 KB)
📄 knightstour.tcl(8.38 KB)
📄 label.tcl(1.29 KB)
📄 labelframe.tcl(1.8 KB)
📄 license.terms(2.16 KB)
📄 mclist.tcl(3.89 KB)
📄 menu.tcl(6.57 KB)
📄 menubu.tcl(4.37 KB)
📄 msgbox.tcl(1.98 KB)
📄 nl.msg(6.61 KB)
📄 paned1.tcl(1.08 KB)
📄 paned2.tcl(2.18 KB)
📄 pendulum.tcl(7.46 KB)
📄 plot.tcl(2.69 KB)
📄 puzzle.tcl(2.54 KB)
📄 radio.tcl(2.69 KB)
📄 rmt(5.22 KB)
📄 rolodex(8.11 KB)
📄 ruler.tcl(5.09 KB)
📄 sayings.tcl(2.21 KB)
📄 search.tcl(4.29 KB)
📄 spin.tcl(1.78 KB)
📄 states.tcl(1.63 KB)
📄 style.tcl(6.78 KB)
📄 tclIndex(4.25 KB)
📄 tcolor(10.99 KB)
📄 text.tcl(3.34 KB)
📄 textpeer.tcl(2.13 KB)
📄 timer(1.09 KB)
📄 toolbar.tcl(3.19 KB)
📄 tree.tcl(3.29 KB)
📄 ttkbut.tcl(3.34 KB)
📄 ttkmenu.tcl(2.35 KB)
📄 ttknote.tcl(2.41 KB)
📄 ttkpane.tcl(3.95 KB)
📄 ttkprogress.tcl(1.52 KB)
📄 ttkscale.tcl(1.39 KB)
📄 twind.tcl(10.57 KB)
📄 unicodeout.tcl(3.45 KB)
📄 vscale.tcl(1.44 KB)
📄 widget(22.83 KB)

Editing: aniwave.tcl

# aniwave.tcl --
#
# This demonstration script illustrates how to adjust canvas item
# coordinates in a way that does something fairly similar to waveform
# display.

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

package require Tk

set w .aniwave
catch {destroy $w}
toplevel $w
wm title $w "Animated Wave Demonstration"
wm iconname $w "aniwave"
positionWindow $w

label $w.msg -font $font -wraplength 4i -justify left -text "This demonstration contains a canvas widget with a line item inside it. The animation routines work by adjusting the coordinates list of the line; a trace on a variable is used so updates to the variable result in a change of position of the line." 
pack $w.msg -side top

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

# Create a canvas large enough to hold the wave. In fact, the wave
# sticks off both sides of the canvas to prevent visual glitches.
pack [canvas $w.c -width 300 -height 200 -background black] -padx 10 -pady 10 -expand yes

# Ensure that this this is an array
array set animationCallbacks {}

# Creates a coordinates list of a wave. This code does a very sketchy
# job and relies on Tk's line smoothing to make things look better.
set waveCoords {}
for {set x -10} {$x<=300} {incr x 5} {
    lappend waveCoords $x 100
}
lappend waveCoords $x 0 [incr x 5] 200

# Create a smoothed line and arrange for its coordinates to be the
# contents of the variable waveCoords.
$w.c create line $waveCoords -tags wave -width 1 -fill green -smooth 1
proc waveCoordsTracer {w args} {
    global waveCoords
    # Actual visual update will wait until we have finished
    # processing; Tk does that for us automatically.
    $w.c coords wave $waveCoords
}
trace add variable waveCoords write [list waveCoordsTracer $w]

# Basic motion handler. Given what direction the wave is travelling
# in, it advances the y coordinates in the coordinate-list one step in
# that direction.
proc basicMotion {} {
    global waveCoords direction
    set oc $waveCoords
    for {set i 1} {$i<[llength $oc]} {incr i 2} {
	if {$direction eq "left"} {
	    lset waveCoords $i [lindex $oc \
		    [expr {$i+2>[llength $oc] ? 1 : $i+2}]]
	} else {
	    lset waveCoords $i \
		    [lindex $oc [expr {$i-2<0 ? "end" : $i-2}]]
	}
    }
}

# Oscillation handler. This detects whether to reverse the direction
# of the wave by checking to see if the peak of the wave has moved off
# the screen (whose size we know already.)
proc reverser {} {
    global waveCoords direction
    if {[lindex $waveCoords 1] < 10} {
	set direction "right"
    } elseif {[lindex $waveCoords end] < 10} {
	set direction "left"
    }
}

# Main animation "loop". This calls the two procedures that handle the
# movement repeatedly by scheduling asynchronous calls back to itself
# using the [after] command. This procedure is the fundamental basis
# for all animated effect handling in Tk.
proc move {} {
    basicMotion
    reverser

# Theoretically 100 frames-per-second (==10ms between frames)
    global animationCallbacks
    set animationCallbacks(simpleWave) [after 10 move]
}

# Initialise our remaining animation variables
set direction "left"
set animateAfterCallback {}
# Arrange for the animation loop to stop when the canvas is deleted
bind $w.c <Destroy> {
    after cancel $animationCallbacks(simpleWave)
    unset animationCallbacks(simpleWave)
}
# Start the animation processing
move

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Editing: aniwave.tcl

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