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[eos/base.git] / util / src / TclTk / tk8.6.12 / library / ttk / scrollbar.tcl

diff --git a/util/src/TclTk/tk8.6.12/library/ttk/scrollbar.tcl b/util/src/TclTk/tk8.6.12/library/ttk/scrollbar.tcl
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+++ b/util/src/TclTk/tk8.6.12/library/ttk/scrollbar.tcl
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+#
+# Bindings for TScrollbar widget
+#
+
+namespace eval ttk::scrollbar {
+    variable State
+    # State(xPress)    --
+    # State(yPress)    -- initial position of mouse at start of drag.
+    # State(first)     -- value of -first at start of drag.
+}
+
+bind TScrollbar <Button-1>             { ttk::scrollbar::Press %W %x %y }
+bind TScrollbar <B1-Motion>            { ttk::scrollbar::Drag %W %x %y }
+bind TScrollbar <ButtonRelease-1>      { ttk::scrollbar::Release %W %x %y }
+
+bind TScrollbar <Button-2>             { ttk::scrollbar::Jump %W %x %y }
+bind TScrollbar <B2-Motion>            { ttk::scrollbar::Drag %W %x %y }
+bind TScrollbar <ButtonRelease-2>      { ttk::scrollbar::Release %W %x %y }
+
+# Redirect scrollwheel bindings to the scrollbar widget
+#
+# The shift-bindings scroll left/right (not up/down)
+# if a widget has both possibilities
+set eventList [list <MouseWheel> <Shift-MouseWheel>]
+switch [tk windowingsystem] {
+    aqua {
+        lappend eventList <Option-MouseWheel> <Shift-Option-MouseWheel>
+    }
+    x11 {
+        lappend eventList <Button-4> <Button-5> \
+                <Shift-Button-4> <Shift-Button-5>
+    }
+}
+foreach event $eventList {
+    bind TScrollbar $event [bind Scrollbar $event]
+}
+unset eventList event
+
+proc ttk::scrollbar::Scroll {w n units} {
+    set cmd [$w cget -command]
+    if {$cmd ne ""} {
+       uplevel #0 $cmd scroll $n $units
+    }
+}
+
+proc ttk::scrollbar::Moveto {w fraction} {
+    set cmd [$w cget -command]
+    if {$cmd ne ""} {
+       uplevel #0 $cmd moveto $fraction
+    }
+}
+
+proc ttk::scrollbar::Press {w x y} {
+    variable State
+
+    set State(xPress) $x
+    set State(yPress) $y
+
+    switch -glob -- [$w identify $x $y] {
+       *uparrow -
+       *leftarrow {
+           ttk::Repeatedly Scroll $w -1 units
+       }
+       *downarrow -
+       *rightarrow {
+           ttk::Repeatedly Scroll $w  1 units
+       }
+       *grip -
+       *thumb {
+           set State(first) [lindex [$w get] 0]
+       }
+       *trough {
+           set f [$w fraction $x $y]
+           if {$f < [lindex [$w get] 0]} {
+               # Clicked in upper/left trough
+               ttk::Repeatedly Scroll $w -1 pages
+           } elseif {$f > [lindex [$w get] 1]} {
+               # Clicked in lower/right trough
+               ttk::Repeatedly Scroll $w 1 pages
+           } else {
+               # Clicked on thumb (???)
+               set State(first) [lindex [$w get] 0]
+           }
+       }
+    }
+}
+
+proc ttk::scrollbar::Drag {w x y} {
+    variable State
+    if {![info exists State(first)]} {
+       # Initial buttonpress was not on the thumb,
+       # or something screwy has happened.  In either case, ignore:
+       return;
+    }
+    set xDelta [expr {$x - $State(xPress)}]
+    set yDelta [expr {$y - $State(yPress)}]
+    Moveto $w [expr {$State(first) + [$w delta $xDelta $yDelta]}]
+}
+
+proc ttk::scrollbar::Release {w x y} {
+    variable State
+    unset -nocomplain State(xPress) State(yPress) State(first)
+    ttk::CancelRepeat
+}
+
+# scrollbar::Jump -- Button-2 binding for scrollbars.
+#      Behaves exactly like scrollbar::Press, except that
+#      clicking in the trough jumps to the the selected position.
+#
+proc ttk::scrollbar::Jump {w x y} {
+    variable State
+
+    switch -glob -- [$w identify $x $y] {
+       *grip -
+       *thumb -
+       *trough {
+           set State(first) [$w fraction $x $y]
+           Moveto $w $State(first)
+           set State(xPress) $x
+           set State(yPress) $y
+       }
+       default {
+           Press $w $x $y
+       }
+    }
+}