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Diffstat (limited to 'library/demos/twind.tcl')
| -rw-r--r-- | library/demos/twind.tcl | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/library/demos/twind.tcl b/library/demos/twind.tcl new file mode 100644 index 0000000..75e732c --- /dev/null +++ b/library/demos/twind.tcl @@ -0,0 +1,196 @@ +# twind.tcl -- +# +# This demonstration script creates a text widget with a bunch of +# embedded windows. +# +# SCCS: @(#) twind.tcl 1.7 97/03/02 16:28:22 + +if {![info exists widgetDemo]} { + error "This script should be run from the \"widget\" demo." +} + +set w .twind +catch {destroy $w} +toplevel $w +wm title $w "Text Demonstration - Embedded Windows" +wm iconname $w "Embedded Windows" +positionWindow $w + +frame $w.buttons +pack $w.buttons -side bottom -fill x -pady 2m +button $w.buttons.dismiss -text Dismiss -command "destroy $w" +button $w.buttons.code -text "See Code" -command "showCode $w" +pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 + +frame $w.f -highlightthickness 2 -borderwidth 2 -relief sunken +set t $w.f.text +text $t -yscrollcommand "$w.scroll set" -setgrid true -font $font -width 70 \ + -height 35 -wrap word -highlightthickness 0 -borderwidth 0 +pack $t -expand yes -fill both +scrollbar $w.scroll -command "$t yview" +pack $w.scroll -side right -fill y +pack $w.f -expand yes -fill both +$t tag configure center -justify center -spacing1 5m -spacing3 5m +$t tag configure buttons -lmargin1 1c -lmargin2 1c -rmargin 1c \ + -spacing1 3m -spacing2 0 -spacing3 0 + +button $t.on -text "Turn On" -command "textWindOn $w" \ + -cursor top_left_arrow +button $t.off -text "Turn Off" -command "textWindOff $w" \ + -cursor top_left_arrow +button $t.click -text "Click Here" -command "textWindPlot $t" \ + -cursor top_left_arrow +button $t.delete -text "Delete" -command "textWindDel $w" \ + -cursor top_left_arrow + +$t insert end "A text widget can contain other widgets embedded " +$t insert end "it. These are called \"embedded windows\", " +$t insert end "and they can consist of arbitrary widgets. " +$t insert end "For example, here are two embedded button " +$t insert end "widgets. You can click on the first button to " +$t window create end -window $t.on +$t insert end " horizontal scrolling, which also turns off " +$t insert end "word wrapping. Or, you can click on the second " +$t insert end "button to\n" +$t window create end -window $t.off +$t insert end " horizontal scrolling and turn back on word wrapping.\n\n" + +$t insert end "Or, here is another example. If you " +$t window create end -window $t.click +$t insert end " a canvas displaying an x-y plot will appear right here." +$t mark set plot insert +$t mark gravity plot left +$t insert end " You can drag the data points around with the mouse, " +$t insert end "or you can click here to " +$t window create end -window $t.delete +$t insert end " the plot again.\n\n" + +$t insert end "You may also find it useful to put embedded windows in " +$t insert end "a text without any actual text. In this case the " +$t insert end "text widget acts like a geometry manager. For " +$t insert end "example, here is a collection of buttons laid out " +$t insert end "neatly into rows by the text widget. These buttons " +$t insert end "can be used to change the background color of the " +$t insert end "text widget (\"Default\" restores the color to " +$t insert end "its default). If you click on the button labeled " +$t insert end "\"Short\", it changes to a longer string so that " +$t insert end "you can see how the text widget automatically " +$t insert end "changes the layout. Click on the button again " +$t insert end "to restore the short string.\n" + +button $t.default -text Default -command "embDefBg $t" \ + -cursor top_left_arrow +$t window create end -window $t.default -padx 3 +global embToggle +set embToggle Short +checkbutton $t.toggle -textvariable embToggle -indicatoron 0 \ + -variable embToggle -onvalue "A much longer string" \ + -offvalue "Short" -cursor top_left_arrow -pady 5 -padx 2 +$t window create end -window $t.toggle -padx 3 -pady 2 +set i 1 +foreach color {AntiqueWhite3 Bisque1 Bisque2 Bisque3 Bisque4 + SlateBlue3 RoyalBlue1 SteelBlue2 DeepSkyBlue3 LightBlue1 + DarkSlateGray1 Aquamarine2 DarkSeaGreen2 SeaGreen1 + Yellow1 IndianRed1 IndianRed2 Tan1 Tan4} { + button $t.color$i -text $color -cursor top_left_arrow -command \ + "$t configure -bg $color" + $t window create end -window $t.color$i -padx 3 -pady 2 + incr i +} +$t tag add buttons $t.default end + +proc textWindOn w { + catch {destroy $w.scroll2} + set t $w.f.text + scrollbar $w.scroll2 -orient horizontal -command "$t xview" + pack $w.scroll2 -after $w.buttons -side bottom -fill x + $t configure -xscrollcommand "$w.scroll2 set" -wrap none +} + +proc textWindOff w { + catch {destroy $w.scroll2} + set t $w.f.text + $t configure -xscrollcommand {} -wrap word +} + +proc textWindPlot t { + set c $t.c + if [winfo exists $c] { + return + } + canvas $c -relief sunken -width 450 -height 300 -cursor top_left_arrow + + set font {Helvetica 18} + + $c create line 100 250 400 250 -width 2 + $c create line 100 250 100 50 -width 2 + $c create text 225 20 -text "A Simple Plot" -font $font -fill brown + + for {set i 0} {$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 $font + } + for {set i 0} {$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 $font + } + + 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 \ + -fill SkyBlue2] + $c addtag point withtag $item + } + + $c bind point <Any-Enter> "$c itemconfig current -fill red" + $c bind point <Any-Leave> "$c itemconfig current -fill SkyBlue2" + $c bind point <1> "embPlotDown $c %x %y" + $c bind point <ButtonRelease-1> "$c dtag selected" + bind $c <B1-Motion> "embPlotMove $c %x %y" + while {[string first [$t get plot] " \t\n"] >= 0} { + $t delete plot + } + $t insert plot "\n" + $t window create plot -window $c + $t tag add center plot + $t insert plot "\n" +} + +set embPlot(lastX) 0 +set embPlot(lastY) 0 + +proc embPlotDown {w x y} { + global embPlot + $w dtag selected + $w addtag selected withtag current + $w raise current + set embPlot(lastX) $x + set embPlot(lastY) $y +} + +proc embPlotMove {w x y} { + global embPlot + $w move selected [expr $x-$embPlot(lastX)] [expr $y-$embPlot(lastY)] + set embPlot(lastX) $x + set embPlot(lastY) $y +} + +proc textWindDel w { + set t $w.f.text + if [winfo exists $t.c] { + $t delete $t.c + while {[string first [$t get plot] " \t\n"] >= 0} { + $t delete plot + } + $t insert plot " " + } +} + +proc embDefBg t { + $t configure -background [lindex [$t configure -background] 3] +} |