tkfbox.tcl

genesis 2000 v9.1软件下载

# tkfbox.tcl --
#
#	Implements the "TK" standard file selection dialog box. This
#	dialog box is used on the Unix platforms whenever the tk_strictMotif
#	flag is not set.
#
#	The "TK" standard file selection dialog box is similar to the
#	file selection dialog box on Win95(TM). The user can navigate
#	the directories by clicking on the folder icons or by
#	selectinf the "Directory" option menu. The user can select
#	files by clicking on the file icons or by entering a filename
#	in the "Filename:" entry.
#
# RCS: @(#) $Id: tkfbox.tcl,v 1.8 1998/11/12 06:22:05 welch Exp $
#
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#

#----------------------------------------------------------------------
#
#		      I C O N   L I S T
#
# This is a pseudo-widget that implements the icon list inside the 
# tkFDialog dialog box.
#
#----------------------------------------------------------------------

# tkIconList --
#
#	Creates an IconList widget.
#
proc tkIconList {w args} {
    upvar #0 $w data

    tkIconList_Config $w $args
    tkIconList_Create $w
}

# tkIconList_Config --
#
#	Configure the widget variables of IconList, according to the command
#	line arguments.
#
proc tkIconList_Config {w argList} {
    upvar #0 $w data

    # 1: the configuration specs
    #
    set specs {
	{-browsecmd "" "" ""}
	{-command "" "" ""}
    }

    # 2: parse the arguments
    #
    tclParseConfigSpec $w $specs "" $argList
}

# tkIconList_Create --
#
#	Creates an IconList widget by assembling a canvas widget and a
#	scrollbar widget. Sets all the bindings necessary for the IconList's
#	operations.
#
proc tkIconList_Create {w} {
    upvar #0 $w data

    frame $w
    set data(sbar)   [scrollbar $w.sbar -orient horizontal \
	-highlightthickness 0 -takefocus 0]
    set data(canvas) [canvas $w.canvas -bd 2 -relief sunken \
	-width 400 -height 120 -takefocus 1]
    pack $data(sbar) -side bottom -fill x -padx 2
    pack $data(canvas) -expand yes -fill both

    $data(sbar) config -command "$data(canvas) xview"
    $data(canvas) config -xscrollcommand "$data(sbar) set"

    # Initializes the max icon/text width and height and other variables
    #
    set data(maxIW) 1
    set data(maxIH) 1
    set data(maxTW) 1
    set data(maxTH) 1
    set data(numItems) 0
    set data(curItem)  {}
    set data(noScroll) 1

    # Creates the event bindings.
    #
    bind $data(canvas) <Configure> "tkIconList_Arrange $w"

    bind $data(canvas) <1>         "tkIconList_Btn1 $w %x %y"
    bind $data(canvas) <B1-Motion> "tkIconList_Motion1 $w %x %y"
    bind $data(canvas) <Double-1>  "tkIconList_Double1 $w %x %y"
    bind $data(canvas) <ButtonRelease-1> "tkCancelRepeat"
    bind $data(canvas) <B1-Leave>  "tkIconList_Leave1 $w %x %y"
    bind $data(canvas) <B1-Enter>  "tkCancelRepeat"

    bind $data(canvas) <Up>        "tkIconList_UpDown $w -1"
    bind $data(canvas) <Down>      "tkIconList_UpDown $w  1"
    bind $data(canvas) <Left>      "tkIconList_LeftRight $w -1"
    bind $data(canvas) <Right>     "tkIconList_LeftRight $w  1"
    bind $data(canvas) <Return>    "tkIconList_ReturnKey $w"
    bind $data(canvas) <KeyPress>  "tkIconList_KeyPress $w %A"
    bind $data(canvas) <Control-KeyPress> ";"
    bind $data(canvas) <Alt-KeyPress>  ";"

    bind $data(canvas) <FocusIn>   "tkIconList_FocusIn $w"

    return $w
}

# tkIconList_AutoScan --
#
# This procedure is invoked when the mouse leaves an entry window
# with button 1 down.  It scrolls the window up, down, left, or
# right, depending on where the mouse left the window, and reschedules
# itself as an "after" command so that the window continues to scroll until
# the mouse moves back into the window or the mouse button is released.
#
# Arguments:
# w -		The IconList window.
#
proc tkIconList_AutoScan {w} {
    upvar #0 $w data
    global tkPriv

    if {![winfo exists $w]} return
    set x $tkPriv(x)
    set y $tkPriv(y)

    if {$data(noScroll)} {
	return
    }
    if {$x >= [winfo width $data(canvas)]} {
	$data(canvas) xview scroll 1 units
    } elseif {$x < 0} {
	$data(canvas) xview scroll -1 units
    } elseif {$y >= [winfo height $data(canvas)]} {
	# do nothing
    } elseif {$y < 0} {
	# do nothing
    } else {
	return
    }

    tkIconList_Motion1 $w $x $y
    set tkPriv(afterId) [after 50 tkIconList_AutoScan $w]
}

# Deletes all the items inside the canvas subwidget and reset the IconList's
# state.
#
proc tkIconList_DeleteAll {w} {
    upvar #0 $w data
    upvar #0 $w:itemList itemList

    $data(canvas) delete all
    catch {unset data(selected)}
    catch {unset data(rect)}
    catch {unset data(list)}
    catch {unset itemList}
    set data(maxIW) 1
    set data(maxIH) 1
    set data(maxTW) 1
    set data(maxTH) 1
    set data(numItems) 0
    set data(curItem)  {}
    set data(noScroll) 1
    $data(sbar) set 0.0 1.0
    $data(canvas) xview moveto 0
}

# Adds an icon into the IconList with the designated image and text
#
proc tkIconList_Add {w image text} {
    upvar #0 $w data
    upvar #0 $w:itemList itemList
    upvar #0 $w:textList textList

    set iTag [$data(canvas) create image 0 0 -image $image -anchor nw]
    set tTag [$data(canvas) create text  0 0 -text  $text  -anchor nw \
	-font $data(font)]
    set rTag [$data(canvas) create rect  0 0 0 0 -fill "" -outline ""]
    
    set b [$data(canvas) bbox $iTag]
    set iW [expr {[lindex $b 2]-[lindex $b 0]}]
    set iH [expr {[lindex $b 3]-[lindex $b 1]}]
    if {$data(maxIW) < $iW} {
	set data(maxIW) $iW
    }
    if {$data(maxIH) < $iH} {
	set data(maxIH) $iH
    }
    
    set b [$data(canvas) bbox $tTag]
    set tW [expr {[lindex $b 2]-[lindex $b 0]}]
    set tH [expr {[lindex $b 3]-[lindex $b 1]}]
    if {$data(maxTW) < $tW} {
	set data(maxTW) $tW
    }
    if {$data(maxTH) < $tH} {
	set data(maxTH) $tH
    }
    
    lappend data(list) [list $iTag $tTag $rTag $iW $iH $tW $tH $data(numItems)]
    set itemList($rTag) [list $iTag $tTag $text $data(numItems)]
    set textList($data(numItems)) [string tolower $text]
    incr data(numItems)
}

# Places the icons in a column-major arrangement.
#
proc tkIconList_Arrange {w} {
    upvar #0 $w data

    if {![info exists data(list)]} {
	if {[info exists data(canvas)] && [winfo exists $data(canvas)]} {
	    set data(noScroll) 1
	    $data(sbar) config -command ""
	}
	return
    }

    set W [winfo width  $data(canvas)]
    set H [winfo height $data(canvas)]
    set pad [expr {[$data(canvas) cget -highlightthickness] + \
	    [$data(canvas) cget -bd]}]
    if {$pad < 2} {
	set pad 2
    }

    incr W -[expr {$pad*2}]
    incr H -[expr {$pad*2}]

    set dx [expr {$data(maxIW) + $data(maxTW) + 8}]
    if {$data(maxTH) > $data(maxIH)} {
	set dy $data(maxTH)
    } else {
	set dy $data(maxIH)
    }
    incr dy 2
    set shift [expr {$data(maxIW) + 4}]

    set x [expr {$pad * 2}]
    set y [expr {$pad * 1}] ; # Why * 1 ?
    set usedColumn 0
    foreach sublist $data(list) {
	set usedColumn 1
	set iTag [lindex $sublist 0]
	set tTag [lindex $sublist 1]
	set rTag [lindex $sublist 2]
	set iW   [lindex $sublist 3]
	set iH   [lindex $sublist 4]
	set tW   [lindex $sublist 5]
	set tH   [lindex $sublist 6]

	set i_dy [expr {($dy - $iH)/2}]
	set t_dy [expr {($dy - $tH)/2}]

	$data(canvas) coords $iTag $x                    [expr {$y + $i_dy}]
	$data(canvas) coords $tTag [expr {$x + $shift}]  [expr {$y + $t_dy}]
	$data(canvas) coords $tTag [expr {$x + $shift}]  [expr {$y + $t_dy}]
	$data(canvas) coords $rTag $x $y [expr {$x+$dx}] [expr {$y+$dy}]

	incr y $dy
	if {($y + $dy) > $H} {
	    set y [expr {$pad * 1}] ; # *1 ?
	    incr x $dx
	    set usedColumn 0
	}
    }

    if {$usedColumn} {
	set sW [expr {$x + $dx}]
    } else {
	set sW $x
    }

    if {$sW < $W} {
	$data(canvas) config -scrollregion "$pad $pad $sW $H"
	$data(sbar) config -command ""
	$data(canvas) xview moveto 0
	set data(noScroll) 1
    } else {
	$data(canvas) config -scrollregion "$pad $pad $sW $H"
	$data(sbar) config -command "$data(canvas) xview"
	set data(noScroll) 0
    }

    set data(itemsPerColumn) [expr {($H-$pad)/$dy}]
    if {$data(itemsPerColumn) < 1} {
	set data(itemsPerColumn) 1
    }

    if {$data(curItem) != {}} {
	tkIconList_Select $w [lindex [lindex $data(list) $data(curItem)] 2] 0
    }
}

# Gets called when the user invokes the IconList (usually by double-clicking
# or pressing the Return key).
#
proc tkIconList_Invoke {w} {
    upvar #0 $w data

    if {[string compare $data(-command) ""] && [info exists data(selected)]} {
	eval $data(-command)
    }
}

# tkIconList_See --
#
#	If the item is not (completely) visible, scroll the canvas so that
#	it becomes visible.
proc tkIconList_See {w rTag} {
    upvar #0 $w data
    upvar #0 $w:itemList itemList

    if {$data(noScroll)} {
	return
    }
    set sRegion [$data(canvas) cget -scrollregion]
    if {![string compare $sRegion {}]} {
	return
    }

    if {![info exists itemList($rTag)]} {
	return
    }


    set bbox [$data(canvas) bbox $rTag]
    set pad [expr {[$data(canvas) cget -highlightthickness] + \
	    [$data(canvas) cget -bd]}]

    set x1 [lindex $bbox 0]
    set x2 [lindex $bbox 2]
    incr x1 -[expr {$pad * 2}]
    incr x2 -[expr {$pad * 1}] ; # *1 ?

    set cW [expr {[winfo width $data(canvas)] - $pad*2}]

    set scrollW [expr {[lindex $sRegion 2]-[lindex $sRegion 0]+1}]
    set dispX [expr {int([lindex [$data(canvas) xview] 0]*$scrollW)}]
    set oldDispX $dispX

    # check if out of the right edge
    #
    if {($x2 - $dispX) >= $cW} {
	set dispX [expr {$x2 - $cW}]
    }
    # check if out of the left edge
    #
    if {($x1 - $dispX) < 0} {
	set dispX $x1
    }

    if {$oldDispX != $dispX} {
	set fraction [expr {double($dispX)/double($scrollW)}]
	$data(canvas) xview moveto $fraction
    }
}

proc tkIconList_SelectAtXY {w x y} {
    upvar #0 $w data

    tkIconList_Select $w [$data(canvas) find closest \
	[$data(canvas) canvasx $x] [$data(canvas) canvasy $y]]
}

proc tkIconList_Select {w rTag {callBrowse 1}} {
    upvar #0 $w data
    upvar #0 $w:itemList itemList

    if {![info exists itemList($rTag)]} {
	return
    }
    set iTag   [lindex $itemList($rTag) 0]
    set tTag   [lindex $itemList($rTag) 1]
    set text   [lindex $itemList($rTag) 2]
    set serial [lindex $itemList($rTag) 3]

    if {![info exists data(rect)]} {
        set data(rect) [$data(canvas) create rect 0 0 0 0 \
	    -fill #a0a0ff -outline #a0a0ff]
    }
    $data(canvas) lower $data(rect)
    set bbox [$data(canvas) bbox $tTag]
    eval $data(canvas) coords $data(rect) $bbox

    set data(curItem) $serial
    set data(selected) $text
    
    if {$callBrowse} {
	if {[string compare $data(-browsecmd) ""]} {
	    eval $data(-browsecmd) [list $text]
	}
    }
}

proc tkIconList_Unselect {w} {
    upvar #0 $w data

    if {[info exists data(rect)]} {
	$data(canvas) delete $data(rect)
	unset data(rect)
    }
    if {[info exists data(selected)]} {
	unset data(selected)
    }
    set data(curItem)  {}
}

# Returns the selected item
#
proc tkIconList_Get {w} {
    upvar #0 $w data

    if {[info exists data(selected)]} {
	return $data(selected)
    } else {
	return ""
    }
}


proc tkIconList_Btn1 {w x y} {
    upvar #0 $w data

    focus $data(canvas)
    tkIconList_SelectAtXY $w $x $y
}

# Gets called on button-1 motions
#
proc tkIconList_Motion1 {w x y} {
    global tkPriv
    set tkPriv(x) $x
    set tkPriv(y) $y

    tkIconList_SelectAtXY $w $x $y
}

proc tkIconList_Double1 {w x y} {
    upvar #0 $w data

    if {$data(curItem) != {}} {
	tkIconList_Invoke $w
    }
}

proc tkIconList_ReturnKey {w} {
    tkIconList_Invoke $w
}

proc tkIconList_Leave1 {w x y} {
    global tkPriv

    set tkPriv(x) $x
    set tkPriv(y) $y
    tkIconList_AutoScan $w
}

proc tkIconList_FocusIn {w} {
    upvar #0 $w data

    if {![info exists data(list)]} {
	return
    }

    if {$data(curItem) == {}} {
	set rTag [lindex [lindex $data(list) 0] 2]
	tkIconList_Select $w $rTag
    }
}

# tkIconList_UpDown --
#
# Moves the active element up or down by one element
#
# Arguments: