Removed the Requirement to Install Python and NodeJS (Now Bundled with Borealis)

Dependencies/Python/tcl/tk8.6/demos/cscroll.tcl

@@ -0,0 +1,171 @@
+# 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 $w.hscroll -orient horizontal -command "$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 <Enter> "scrollEnter $c"
+$c bind all <Leave> "scrollLeave $c"
+$c bind all <Button-1> "scrollButton $c"
+if {([tk windowingsystem] eq "aqua") && ![package vsatisfies [package provide Tk] 8.7-]} {
+    bind $c <Button-3> "$c scan mark %x %y"
+    bind $c <B3-Motion> "$c scan dragto %x %y"
+    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 $c <Button-2> "$c scan mark %x %y"
+    bind $c <B2-Motion> "$c scan dragto %x %y"
+    # We must make sure that positive and negative movements are rounded
+    # equally to integers, avoiding the problem that
+    #     (int)1/-30 = -1,
+    # but
+    #     (int)-1/-30 = 0
+    # The following code ensures equal +/- behaviour.
+    bind $c <MouseWheel> {
+	if {%D >= 0} {
+	    %W yview scroll [expr {%D/-30}] units
+	} else {
+	    %W yview scroll [expr {(%D-29)/-30}] units
+	}
+    }
+    bind $c <Option-MouseWheel> {
+	if {%D >= 0} {
+	    %W yview scroll [expr {%D/-12}] units
+	} else {
+	    %W yview scroll [expr {(%D-11)/-12}] units
+	}
+    }
+    bind $c <Shift-MouseWheel> {
+	if {%D >= 0} {
+	    %W xview scroll [expr {%D/-30}] units
+	} else {
+	    %W xview scroll [expr {(%D-29)/-30}] units
+	}
+    }
+    bind $c <Shift-Option-MouseWheel> {
+	if {%D >= 0} {
+	    %W xview scroll [expr {%D/-12}] units
+	} else {
+	    %W xview scroll [expr {(%D-11)/-12}] units
+	}
+    }
+}
+
+if {[tk windowingsystem] eq "x11" && ![package vsatisfies [package provide Tk] 8.7-]} {
+    # 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:
+    #	https://linuxreviews.org/HOWTO_change_the_mouse_speed_in_X
+    bind $c <Button-4> {
+	if {!$tk_strictMotif} {
+	    %W yview scroll -5 units
+	}
+    }
+    bind $c <Shift-Button-4> {
+	if {!$tk_strictMotif} {
+	    %W xview scroll -5 units
+	}
+    }
+    bind $c <Button-5> {
+	if {!$tk_strictMotif} {
+	    %W yview scroll 5 units
+	}
+    }
+    bind $c <Shift-Button-5> {
+	if {!$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]"
+}