summaryrefslogtreecommitdiff
path: root/Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl
diff options
context:
space:
mode:
Diffstat (limited to 'Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl')
-rw-r--r--Master/tlpkg/tltcl/lib/tk8.6/demos/cscroll.tcl142
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]"
+}