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Diffstat (limited to 'Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl')
-rw-r--r-- | Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl b/Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl new file mode 100644 index 00000000000..443b102bef0 --- /dev/null +++ b/Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl @@ -0,0 +1,142 @@ +# cscroll.tcl -- +# +# This demonstration script creates a simple canvas that can be +# scrolled in two dimensions. + +if {![info exists widgetDemo]} { + error "This script should be run from the \"widget\" demo." +} + +package require Tk + +set w .cscroll +catch {destroy $w} +toplevel $w +wm title $w "Scrollable Canvas Demonstration" +wm iconname $w "cscroll" +positionWindow $w +set c $w.c + +label $w.msg -font $font -wraplength 4i -justify left -text "This window displays a canvas widget that can be scrolled either using the scrollbars or by dragging with button 2 in the canvas. If you click button 1 on one of the rectangles, its indices will be printed on stdout." +pack $w.msg -side top + +## See Code / Dismiss buttons +set btns [addSeeDismiss $w.buttons $w] +pack $btns -side bottom -fill x + +frame $w.grid +scrollbar $w.hscroll -orient horiz -command "$c xview" +scrollbar $w.vscroll -command "$c yview" +canvas $c -relief sunken -borderwidth 2 -scrollregion {-11c -11c 50c 20c} \ + -xscrollcommand "$w.hscroll set" \ + -yscrollcommand "$w.vscroll set" +pack $w.grid -expand yes -fill both -padx 1 -pady 1 +grid rowconfig $w.grid 0 -weight 1 -minsize 0 +grid columnconfig $w.grid 0 -weight 1 -minsize 0 + +grid $c -padx 1 -in $w.grid -pady 1 \ + -row 0 -column 0 -rowspan 1 -columnspan 1 -sticky news +grid $w.vscroll -in $w.grid -padx 1 -pady 1 \ + -row 0 -column 1 -rowspan 1 -columnspan 1 -sticky news +grid $w.hscroll -in $w.grid -padx 1 -pady 1 \ + -row 1 -column 0 -rowspan 1 -columnspan 1 -sticky news + + +set bg [lindex [$c config -bg] 4] +for {set i 0} {$i < 20} {incr i} { + set x [expr {-10 + 3*$i}] + for {set j 0; set y -10} {$j < 10} {incr j; incr y 3} { + $c create rect ${x}c ${y}c [expr {$x+2}]c [expr {$y+2}]c \ + -fill $bg -tags rect + $c create text [expr {$x+1}]c [expr {$y+1}]c -text "$i,$j" \ + -anchor center -tags text + } +} + +$c bind all <Any-Enter> "scrollEnter $c" +$c bind all <Any-Leave> "scrollLeave $c" +$c bind all <1> "scrollButton $c" +bind $c <2> "$c scan mark %x %y" +bind $c <B2-Motion> "$c scan dragto %x %y" +if {[tk windowingsystem] eq "aqua"} { + bind $c <MouseWheel> { + %W yview scroll [expr {-(%D)}] units + } + bind $c <Option-MouseWheel> { + %W yview scroll [expr {-10 * (%D)}] units + } + bind $c <Shift-MouseWheel> { + %W xview scroll [expr {-(%D)}] units + } + bind $c <Shift-Option-MouseWheel> { + %W xview scroll [expr {-10 * (%D)}] units + } +} else { + bind $c <MouseWheel> { + %W yview scroll [expr {-(%D / 30)}] units + } + bind $c <Shift-MouseWheel> { + %W xview scroll [expr {-(%D / 30)}] units + } +} + +if {[tk windowingsystem] eq "x11"} { + # Support for mousewheels on Linux/Unix commonly comes through mapping + # the wheel to the extended buttons. If you have a mousewheel, find + # Linux configuration info at: + # http://linuxreviews.org/howtos/xfree/mouse/ + bind $c <4> { + if {!$tk_strictMotif} { + %W yview scroll -5 units + } + } + bind $c <Shift-4> { + if {!$tk_strictMotif} { + %W xview scroll -5 units + } + } + bind $c <5> { + if {!$tk_strictMotif} { + %W yview scroll 5 units + } + } + bind $c <Shift-5> { + if {!$tk_strictMotif} { + %W xview scroll 5 units + } + } +} + + +proc scrollEnter canvas { + global oldFill + set id [$canvas find withtag current] + if {[lsearch [$canvas gettags current] text] >= 0} { + set id [expr {$id-1}] + } + set oldFill [lindex [$canvas itemconfig $id -fill] 4] + if {[winfo depth $canvas] > 1} { + if {[tk windowingsystem] eq "aqua"} { + $canvas itemconfigure $id -fill systemSelectedTextBackgroundColor + } else { + $canvas itemconfigure $id -fill LightSeaGreen + } + } +} + +proc scrollLeave canvas { + global oldFill + set id [$canvas find withtag current] + if {[lsearch [$canvas gettags current] text] >= 0} { + set id [expr {$id-1}] + } + $canvas itemconfigure $id -fill $oldFill +} + +proc scrollButton canvas { + set id [$canvas find withtag current] + if {[lsearch [$canvas gettags current] text] < 0} { + set id [expr {$id+1}] + } + puts stdout "You buttoned at [lindex [$canvas itemconf $id -text] 4]" +} |