watch.itk

windows下的GDB insight前端

#
# Watch
# ----------------------------------------------------------------------
# Implements a a clock widget in a canvas.
#
# ----------------------------------------------------------------------
#  AUTHOR: John A. Tucker               EMAIL: [e-mail]
#
# ======================================================================
#            Copyright (c) 1997 DSC Technologies Corporation
# ======================================================================
# Permission to use, copy, modify, distribute and license this software 
# and its documentation for any purpose, and without fee or written 
# agreement with DSC, is hereby granted, provided that the above copyright 
# notice appears in all copies and that both the copyright notice and 
# warranty disclaimer below appear in supporting documentation, and that 
# the names of DSC Technologies Corporation or DSC Communications 
# Corporation not be used in advertising or publicity pertaining to the 
# software without specific, written prior permission.
# 
# DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
# INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
# AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, 
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL 
# DSC BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 
# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION,
# ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 
# SOFTWARE.
# ======================================================================

#
# Default resources.
#
option add *Watch.labelFont		\
    -*-Courier-Medium-R-Normal--*-120-*-*-*-*-*-*	widgetDefault

#
# Usual options.
#
itk::usual Watch {
    keep -background -cursor -labelfont -foreground
}

itcl::class iwidgets::Watch {

    inherit itk::Widget

    itk_option define -hourradius hourRadius Radius .50
    itk_option define -hourcolor hourColor Color red

    itk_option define -minuteradius minuteRadius Radius .80
    itk_option define -minutecolor minuteColor Color yellow

    itk_option define -pivotradius pivotRadius Radius .10
    itk_option define -pivotcolor pivotColor Color white

    itk_option define -secondradius secondRadius Radius .90
    itk_option define -secondcolor secondColor Color black

    itk_option define -clockcolor clockColor Color white
    itk_option define -clockstipple clockStipple ClockStipple {}

    itk_option define -state state State normal
    itk_option define -showampm showAmPm ShowAmPm true

    itk_option define -tickcolor tickColor Color black

    constructor {args} {}
    destructor {}

    #
    # Public methods
    #
    public {
	method get {{format "-string"}}
	method show {{time "now"}}
	method watch {args}
    }

    #
    # Private methods
    #
    private {
	method _handMotionCB {tag x y}
	method _drawHand {tag}
	method _handReleaseCB {tag x y}
	method _displayClock {{when "later"}}

	variable _interior
	variable _radius
	variable _theta
	variable _extent
	variable _reposition ""  ;# non-null => _displayClock pending
	variable _timeVar
	variable _x0 1
	variable _y0 1

	common _ampmVar
	common PI [expr {2*asin(1.0)}]
    }
}

#
# Provide a lowercased access method for the Watch class.
# 
proc ::iwidgets::watch {pathName args} {
    uplevel ::iwidgets::Watch $pathName $args
}

#
# Use option database to override default resources of base classes.
#
option add *Watch.width 155 widgetDefault
option add *Watch.height 175 widgetDefault

# -----------------------------------------------------------------------------
#                        CONSTRUCTOR
# -----------------------------------------------------------------------------
itcl::body iwidgets::Watch::constructor { args } {
    #
    # Add back to the hull width and height options and make the
    # borderwidth zero since we don't need it.
    #
    set _interior $itk_interior

    itk_option add hull.width hull.height
    component hull configure -borderwidth 0
    grid propagate $itk_component(hull) no

    set _ampmVar($this) "AM"
    set _radius(outer) 1

    set _radius(hour) 1
    set _radius(minute) 1
    set _radius(second) 1

    set _theta(hour) 30
    set _theta(minute) 6
    set _theta(second) 6

    set _extent(hour) 14
    set _extent(minute) 14
    set _extent(second) 2

    set _timeVar(hour) 12
    set _timeVar(minute) 0
    set _timeVar(second) 0

    #
    # Create the frame in which the "AM" and "PM" radiobuttons will be drawn
    #
    itk_component add frame {
	frame $itk_interior.frame
    } 

    #
    # Create the canvas in which the clock will be drawn
    #
    itk_component add canvas {
	canvas $itk_interior.canvas
    }
    bind $itk_component(canvas) <Map> +[itcl::code $this _displayClock]
    bind $itk_component(canvas) <Configure> +[itcl::code $this _displayClock]

    #
    # Create the "AM" and "PM" radiobuttons to be drawn in the canvas
    #
    itk_component add am {
	radiobutton $itk_component(frame).am \
	    -text "AM" \
	    -value "AM" \
	    -variable [itcl::scope _ampmVar($this)]
    } {
	usual
	rename -font -labelfont labelFont Font
    }

    itk_component add pm {
	radiobutton $itk_component(frame).pm \
	    -text "PM" \
	    -value "PM" \
	    -variable [itcl::scope _ampmVar($this)]
    } {
	usual
	rename -font -labelfont labelFont Font
    }

    #
    # Create the canvas item for displaying the main oval which encapsulates
    # the entire clock.
    #
    watch create oval 0 0 2 2 -width 5 -tags clock

    #
    # Create the canvas items for displaying the 60 ticks marks around the
    # inner perimeter of the watch.
    #
    set extent 3
    for {set i 0} {$i < 60} {incr i} {
	set start [expr {$i*6-1}]
	set tag [expr {[expr {$i%5}] == 0 ? "big" : "little"}]
	watch create arc 0 0 0 0 \
	    -style arc \
	    -extent $extent \
	    -start $start \
	    -tags "tick$i tick $tag"
    }

    #
    # Create the canvas items for displaying the hour, minute, and second hands
    # of the watch.  Add bindings to allow the mouse to move and set the
    # clock hands.
    #
    watch create arc 1 1 1 1 -extent 30 -tags minute
    watch create arc 1 1 1 1 -extent 30 -tags hour
    watch create arc 1 1 1 1 -tags second

    #
    # Create the canvas item for displaying the center of the watch in which
    # the hour, minute, and second hands will pivot.
    #
    watch create oval 0 0 1 1 -width 5 -fill black -tags pivot

    #
    # Position the "AM/PM" button frame and watch canvas.
    #
    grid $itk_component(frame) -row 0 -column 0 -sticky new
    grid $itk_component(canvas) -row 1 -column 0 -sticky nsew

    grid rowconfigure    $itk_interior 0 -weight 0
    grid rowconfigure    $itk_interior 1 -weight 1
    grid columnconfigure $itk_interior 0 -weight 1

    eval itk_initialize $args
}

# -----------------------------------------------------------------------------
#                           DESTURCTOR
# -----------------------------------------------------------------------------
itcl::body iwidgets::Watch::destructor {} {
    if {$_reposition != ""} {
	after cancel $_reposition
    }
}

# -----------------------------------------------------------------------------
#                            METHODS
# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# METHOD: _handReleaseCB tag x y
#
# -----------------------------------------------------------------------------
itcl::body iwidgets::Watch::_handReleaseCB {tag x y} {

    set atanab [expr {atan2(double($y-$_y0),double($x-$_x0))*(180/$PI)}]
    set degrees [expr {$atanab > 0 ? [expr {360-$atanab}] : abs($atanab)}]
    set ticks [expr {round($degrees/$_theta($tag))}]
    set _timeVar($tag) [expr {((450-$ticks*$_theta($tag))%360)/$_theta($tag)}]

    if {$tag == "hour" && $_timeVar(hour) == 0} {
	set _timeVar($tag) 12
    }

    _drawHand $tag
}

# -----------------------------------------------------------------------------
# PROTECTED METHOD: _handMotionCB tag x y
#
# -----------------------------------------------------------------------------
itcl::body iwidgets::Watch::_handMotionCB {tag x y} {
    if {$x == $_x0 || $y == $_y0} {
	return
    }

    set a [expr {$y-$_y0}]
    set b [expr {$x-$_x0}]
    set c [expr {hypot($a,$b)}]

    set atanab [expr {atan2(double($a),double($b))*(180/$PI)}]
    set degrees [expr {$atanab > 0 ? [expr 360-$atanab] : abs($atanab)}]

    set x2 [expr {$_x0+$_radius($tag)*($b/double($c))}]
    set y2 [expr {$_y0+$_radius($tag)*($a/double($c))}]
    watch coords $tag \
	[expr {$x2-$_radius($tag)}] \
	[expr {$y2-$_radius($tag)}] \
	[expr {$x2+$_radius($tag)}] \
	[expr {$y2+$_radius($tag)}]
    set start [expr {$degrees-180-($_extent($tag)/2)}]
    watch itemconfigure $tag -start $start -extent $_extent($tag)
}

# -----------------------------------------------------------------------------
# PROTECTED METHOD: get ?format?
#
# -----------------------------------------------------------------------------
itcl::body iwidgets::Watch::get {{format "-string"}} {
    set timestr [format "%02d:%02d:%02d %s" \
		     $_timeVar(hour) $_timeVar(minute) \
		     $_timeVar(second) $_ampmVar($this)]

    switch -- $format {
	"-string" {
	    return $timestr
	}
	"-clicks" {
	    return [clock scan $timestr]
	}
	default {
	    error "bad format option \"$format\":\