diff options
Diffstat (limited to 'library/demos/plot.tcl')
| -rw-r--r-- | library/demos/plot.tcl | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/library/demos/plot.tcl b/library/demos/plot.tcl index a1109c2..011f140 100644 --- a/library/demos/plot.tcl +++ b/library/demos/plot.tcl @@ -3,7 +3,7 @@ # This demonstration script creates a canvas widget showing a 2-D # plot with data points that can be dragged with the mouse. # -# RCS: @(#) $Id: plot.tcl,v 1.2 1998/09/14 18:23:29 stanton Exp $ +# RCS: @(#) $Id: plot.tcl,v 1.3 2001/06/14 10:56:58 dkf Exp $ if {![info exists widgetDemo]} { error "This script should be run from the \"widget\" demo." @@ -38,20 +38,21 @@ $c create text 225 20 -text "A Simple Plot" -font $plotFont -fill brown for {set i 0} {$i <= 10} {incr i} { set x [expr {100 + ($i*30)}] $c create line $x 250 $x 245 -width 2 - $c create text $x 254 -text [expr 10*$i] -anchor n -font $plotFont + $c create text $x 254 -text [expr {10*$i}] -anchor n -font $plotFont } for {set i 0} {$i <= 5} {incr i} { set y [expr {250 - ($i*40)}] $c create line 100 $y 105 $y -width 2 - $c create text 96 $y -text [expr $i*50].0 -anchor e -font $plotFont + $c create text 96 $y -text [expr {$i*50}].0 -anchor e -font $plotFont } -foreach point {{12 56} {20 94} {33 98} {32 120} {61 180} - {75 160} {98 223}} { +foreach point { + {12 56} {20 94} {33 98} {32 120} {61 180} {75 160} {98 223} +} { set x [expr {100 + (3*[lindex $point 0])}] set y [expr {250 - (4*[lindex $point 1])/5}] - set item [$c create oval [expr $x-6] [expr $y-6] \ - [expr $x+6] [expr $y+6] -width 1 -outline black \ + set item [$c create oval [expr {$x-6}] [expr {$y-6}] \ + [expr {$x+6}] [expr {$y+6}] -width 1 -outline black \ -fill SkyBlue2] $c addtag point withtag $item } @@ -92,7 +93,7 @@ proc plotDown {w x y} { proc plotMove {w x y} { global plot - $w move selected [expr $x-$plot(lastX)] [expr $y-$plot(lastY)] + $w move selected [expr {$x-$plot(lastX)}] [expr {$y-$plot(lastY)}] set plot(lastX) $x set plot(lastY) $y } |