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#

# Dateentry

# ----------------------------------------------------------------------

# Implements a quicken style date entry field with a popup calendar

# by combining the datefield and calendar widgets together.  This

# allows a user to enter the date via the keyboard or by using the

# mouse by selecting the calendar icon which brings up a popup calendar.

# ----------------------------------------------------------------------

#   AUTHOR:  Mark L. Ulferts          E-mail: mulferts@austin.dsccc.com

#

#   @(#) $Id: dateentry.itk,v 1.1.1.1 2002-01-16 10:24:50 markom Exp $

# ----------------------------------------------------------------------

#            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.

# ======================================================================

#

# Usual options.

#

itk::usual Dateentry {

    keep -background -borderwidth -currentdatefont -cursor \

        -datefont -dayfont -foreground -highlightcolor \

        -highlightthickness -labelfont -textbackground -textfont \

        -titlefont

}

# ------------------------------------------------------------------

#                              DATEENTRY

# ------------------------------------------------------------------

class iwidgets::Dateentry {

    inherit iwidgets::Datefield

    constructor {args} {}

    itk_option define -grab grab Grab "global"

    itk_option define -icon icon Icon {}

    #

    # The calendar widget isn't created until needed, yet we need

    # its options to be available upon creation of a dateentry widget.

    # So, we'll define them in these class now so they can just be

    # propagated onto the calendar later.

    #

    itk_option define -days days Days {Su Mo Tu We Th Fr Sa}

    itk_option define -forwardimage forwardImage Image {}

    itk_option define -backwardimage backwardImage Image {}

    itk_option define -weekdaybackground weekdayBackground Background \#d9d9d9

    itk_option define -weekendbackground weekendBackground Background \#d9d9d9

    itk_option define -outline outline Outline \#d9d9d9

    itk_option define -buttonforeground buttonForeground Foreground blue

    itk_option define -foreground foreground Foreground black

    itk_option define -selectcolor selectColor Foreground red

    itk_option define -selectthickness selectThickness SelectThickness 3

    itk_option define -titlefont titleFont Font \

        -*-helvetica-bold-r-normal--*-140-*

    itk_option define -dayfont dayFont Font \

        -*-helvetica-medium-r-normal--*-120-*

    itk_option define -datefont dateFont Font \

        -*-helvetica-medium-r-normal--*-120-*

    itk_option define -currentdatefont currentDateFont Font \

        -*-helvetica-bold-r-normal--*-120-*

    itk_option define -startday startDay Day sunday

    itk_option define -height height Height 165

    itk_option define -width width Width 200

    itk_option define -state state State normal

    protected {

        method _getPopupDate {date}

        method _releaseGrab {}

        method _releaseGrabCheck {rootx rooty}

        method _popup {}

        method _getDefaultIcon {}

        common _defaultIcon ""

    }

}

#

# Provide a lowercased access method for the dateentry class.

#

proc ::iwidgets::dateentry {pathName args} {

    uplevel ::iwidgets::Dateentry $pathName $args

}

# ------------------------------------------------------------------

#                        CONSTRUCTOR

# ------------------------------------------------------------------

body iwidgets::Dateentry::constructor {args} {

    #

    # Create an icon label to act as a button to bring up the

    # calendar popup.

    #

    itk_component add iconbutton {

        label $itk_interior.iconbutton -relief raised

    } {

        keep -borderwidth -cursor -foreground

    }

    grid $itk_component(iconbutton) -row 0 -column 0 -sticky ns

    #

    # Initialize the widget based on the command line options.

    #

    eval itk_initialize $args

}

# ------------------------------------------------------------------

#                             OPTIONS

# ------------------------------------------------------------------

# ------------------------------------------------------------------

# OPTION: -icon

#

# Specifies the calendar icon image to be used in the date.

# Should one not be provided, then a default pixmap will be used

# if possible, bitmap otherwise.

# ------------------------------------------------------------------

configbody iwidgets::Dateentry::icon {

    if {$itk_option(-icon) == {}} {

        $itk_component(iconbutton) configure -image [_getDefaultIcon]

    } else {

        if {[lsearch [image names] $itk_option(-icon)] == -1} {

            error "bad icon option \"$itk_option(-icon)\":\

                   should be an existing image"

        } else {

            $itk_component(iconbutton) configure -image $itk_option(-icon)

        }

    }

}

# ------------------------------------------------------------------

# OPTION: -grab

#

# Specifies the grab level, local or global, to be obtained when

# bringing up the popup calendar.  The default is global.

# ------------------------------------------------------------------

configbody iwidgets::Dateentry::grab {

    switch -- $itk_option(-grab) {

        "local" - "global" {}

        default {

            error "bad grab option \"$itk_option(-grab)\":\

                   should be local or global"

        }

    }

}

# ------------------------------------------------------------------

# OPTION: -state

#

# Specifies the state of the widget which may be disabled or

# normal.  A disabled state prevents selection of the date field

# or date icon button.

# ------------------------------------------------------------------

configbody iwidgets::Dateentry::state {

    switch -- $itk_option(-state) {

        normal {

            bind $itk_component(iconbutton)  [code $this _popup]

        }

        disabled {

            bind $itk_component(iconbutton)  {}

        }

    }

}

# ------------------------------------------------------------------

#                            METHODS

# ------------------------------------------------------------------

# ------------------------------------------------------------------

# PROTECTED METHOD: _getDefaultIcon

#

# This method is invoked uto retrieve the name of the default icon

# image displayed in the icon button.

# ------------------------------------------------------------------

body iwidgets::Dateentry::_getDefaultIcon {} {

    if {[lsearch [image types] pixmap] != -1} {

      set _defaultIcon [image create pixmap -data {

          /* XPM */

          static char *calendar[] = {

          /* width height num_colors chars_per_pixel */

          "    25    20        6            1",

          /* colors */

          ". c #808080",

          "# c #040404",

          "a c #848484",

          "b c #fc0404",

          "c c #fcfcfc",

          "d c #c0c0c0",

          /* pixels */

          "d##########d###########dd",

          "d#ccccccccc##ccccccccca#d",

          "##ccccccccc.#ccccccccc..#",

          "##cccbbcccca#cccbbbccca.#",

          "##cccbbcccc.#ccbbbbbcc..#",

          "##cccbbccc####ccccbbcc..#",

          "##cccbbcccca#ccccbbbcca.#",

          "##cccbbcccc.#cccbbbccc..#",

          "##cccbbcccca#ccbbbcccca.#",

          "##cccbbbccc.#ccbbbbbcc..#",

          "##ccccccccc.#ccccccccc..#",

          "##ccccccccca#ccccccccca.#",

          "##cc#####c#cd#c#####cc..#",

          "##cccccccc####cccccccca.#",

          "##cc#####cc.#cc#####cc..#",

          "##ccccccccc.#ccccccccc..#",

          "##ccccccccc.#ccccccccc..#",

          "##..........#...........#",

          "###..........#..........#",

          "#########################"

         };

        }]

    } else {

        set _defaultIcon [image create bitmap -data {

            #define calendr2_width 25

            #define calendr2_height 20

            static char calendr2_bits[] = {

                0xfe,0xf7,0x7f,0xfe,0x02,0x18,0xc0,0xfe,0x03,

                0x18,0x80,0xff,0x63,0x10,0x47,0xff,0x43,0x98,

                0x8a,0xff,0x63,0x3c,0x4c,0xff,0x43,0x10,0x8a,

                0xff,0x63,0x18,0x47,0xff,0x23,0x90,0x81,0xff,

                0xe3,0x98,0x4e,0xff,0x03,0x10,0x80,0xff,0x03,

                0x10,0x40,0xff,0xf3,0xa5,0x8f,0xff,0x03,0x3c,

                0x40,0xff,0xf3,0x99,0x8f,0xff,0x03,0x10,0x40,

                0xff,0x03,0x18,0x80,0xff,0x57,0x55,0x55,0xff,

                0x57,0xb5,0xaa,0xff,0xff,0xff,0xff,0xff};

        }]

    }

    #

    # Since this image will only need to be created once, we redefine

    # this method to just return the image name for subsequent calls.

    #

    body ::iwidgets::Dateentry::_getDefaultIcon {} {

        return $_defaultIcon

    }

    return $_defaultIcon

}

# ------------------------------------------------------------------

# PROTECTED METHOD: _popup

#

# This method is invoked upon selection of the icon button.  It

# creates a calendar widget within a toplevel popup, calculates

# the position at which to display the calendar, performs a grab

# and displays the calendar.

# ------------------------------------------------------------------

body iwidgets::Dateentry::_popup {} {

    #

    # First, let's nullify the icon binding so that any another

    # selections are ignored until were done with this one.  Next,

    # change the relief of the icon.

    #

    bind $itk_component(iconbutton)  {}

    $itk_component(iconbutton) configure -relief sunken

    #

    # Create a withdrawn toplevel widget and remove the window

    # decoration via override redirect.

    #

    itk_component add -private popup {

        toplevel $itk_interior.popup

    }

    $itk_component(popup) configure -borderwidth 2 -background black

    wm withdraw $itk_component(popup)

    wm overrideredirect $itk_component(popup) 1

    #

    # Add a binding to button 1 events in order to detect mouse

    # clicks off the calendar in which case we'll release the grab.

    # Also add a binding for Escape to always release.

    #

    bind $itk_component(popup) <1> [code $this _releaseGrabCheck %X %Y]

    bind $itk_component(popup)  [code $this _releaseGrab]

    #

    # Create the calendar widget and set its cursor properly.

    #

    itk_component add calendar {

        iwidgets::Calendar $itk_component(popup).calendar \

            -command [code $this _getPopupDate %d]

    } {

        usual

        keep -days -forwardimage -backwardimage -weekdaybackground \

            -weekendbackground -outline -buttonforeground -selectcolor \

            -selectthickness -titlefont -dayfont -datefont \

            -currentdatefont -startday -width -height

    }

    grid $itk_component(calendar) -row 0 -column 0

    $itk_component(calendar) configure -cursor top_left_arrow

    #

    # The icon button will be used as the basis for the position of the

    # popup on the screen.  We'll always attempt to locate the popup

    # off the lower right corner of the button.  If that would put

    # the popup off the screen, then we'll put above the upper left.

    #

    set rootx [winfo rootx $itk_component(iconbutton)]

    set rooty [winfo rooty $itk_component(iconbutton)]

    set popupwidth [winfo reqwidth $itk_component(popup)]

    set popupheight [winfo reqheight $itk_component(popup)]

    set popupx [expr $rootx + 3 + \

                    [winfo width $itk_component(iconbutton)]]

    set popupy [expr $rooty + 3 + \

                    [winfo height $itk_component(iconbutton)]]

    if {([expr $popupx + $popupwidth] > [winfo screenwidth .]) || \

            ([expr $popupy + $popupheight] > [winfo screenheight .])} {

        set popupx [expr $rootx - 3 - $popupwidth]

        set popupy [expr $rooty - 3 - $popupheight]

    }

    #

    # Get the current date from the datefield widget and both

    # show and select it on the calendar.

    #

    $itk_component(calendar) show [get]

    $itk_component(calendar) select [get]

    #

    # Display the popup at the calculated position.

    #

    wm geometry $itk_component(popup) +$popupx+$popupy

    wm deiconify $itk_component(popup)

    tkwait visibility $itk_component(popup)

    #

    # Perform either a local or global grab based on the -grab option.

    #

    if {$itk_option(-grab) == "local"} {

        grab $itk_component(popup)

    } else {

        grab -global $itk_component(popup)

    }

    #

    # Make sure the widget is above all others and give it focus.

    #

    raise $itk_component(popup)

    focus $itk_component(calendar)

}

# ------------------------------------------------------------------

# PROTECTED METHOD: _popupGetDate

#

# This method is the callback for selection of a date on the

# calendar.  It releases the grab and sets the date in the

# datefield widget.

# ------------------------------------------------------------------

body iwidgets::Dateentry::_getPopupDate {date} {

    _releaseGrab

    show $date

}

# ------------------------------------------------------------------

# PROTECTED METHOD: _releaseGrabCheck rootx rooty

#

# This method handles mouse button 1 events.  If the selection

# occured within the bounds of the calendar, then return normally

# and let the calendar handle the event.  Otherwise, we'll drop

# the calendar and release the grab.

# ------------------------------------------------------------------

body iwidgets::Dateentry::_releaseGrabCheck {rootx rooty} {

    set calx [winfo rootx $itk_component(calendar)]

    set caly [winfo rooty $itk_component(calendar)]

    set calwidth [winfo reqwidth $itk_component(calendar)]

    set calheight [winfo reqheight $itk_component(calendar)]

    if {($rootx < $calx) || ($rootx > [expr $calx + $calwidth]) || \

            ($rooty < $caly) || ($rooty > [expr $caly + $calheight])} {

        _releaseGrab

        return -code break

    }

}

# ------------------------------------------------------------------

# PROTECTED METHOD: _releaseGrab

#

# This method releases the grab, destroys the popup, changes the

# relief of the button back to raised and reapplies the binding

# to the icon button that engages the popup action.

# ------------------------------------------------------------------

body iwidgets::Dateentry::_releaseGrab {} {

    grab release $itk_component(popup)

    $itk_component(iconbutton) configure -relief raised

    destroy $itk_component(popup)

    unset itk_component(popup)

    bind $itk_component(iconbutton)  [code $this _popup]

}