buttonbox.itk

这是一个Linux下的集成开发环境

    set index [index $index]
    
    set defbtn [lindex $_buttonList $index]
    
    foreach knownButton $_displayList {
	if {$knownButton == $defbtn} {
	    $itk_component($knownButton) configure -defaultring yes
	} else {
	    $itk_component($knownButton) configure -defaultring no
	}
    }
}

# ------------------------------------------------------------------
# METHOD: hide index
#
# Hide the push button given by index.  This doesn't remove the button 
# permanently from the display list, just inhibits its display.
# ------------------------------------------------------------------
body iwidgets::Buttonbox::hide {index} {
    set index [index $index]
    set tag [lindex $_buttonList $index]
    
    if {[set dind [lsearch $_displayList $tag]] != -1} {
	place forget $itk_component($tag)
	set _displayList [lreplace $_displayList $dind $dind] 
	
	_setBoxSize
    }
}

# ------------------------------------------------------------------
# METHOD: show index
#
# Displays a previously hidden push button given by index.  Check if 
# the button is already in the display list.  If not then add it back 
# at it's original location and redisplay.
# ------------------------------------------------------------------
body iwidgets::Buttonbox::show {index} {
    set index [index $index]
    set tag [lindex $_buttonList $index]
    
    if {[lsearch $_displayList $tag] == -1} {
	set _displayList [linsert $_displayList $index $tag]
	
	_setBoxSize
    }
}

# ------------------------------------------------------------------
# METHOD: invoke ?index?
#
# Invoke the command associated with a push button.  If no arguments
# are given then the default button is invoked, otherwise the argument
# is expected to be a button index.
# ------------------------------------------------------------------
body iwidgets::Buttonbox::invoke {args} {
    if {[llength $args] == 0} {
	$itk_component([lindex $_buttonList [index default]]) invoke
	
    } else {
	$itk_component([lindex $_buttonList [index [lindex $args 0]]]) \
		invoke
    }
}

# ------------------------------------------------------------------
# METHOD: buttonconfigure index ?option? ?value option value ...?
#
# Configure a push button given by index.  This method allows 
# configuration of pushbuttons from the Buttonbox level.  The options
# may have any of the values accepted by the add method.
# ------------------------------------------------------------------
body iwidgets::Buttonbox::buttonconfigure {index args} {
    set tag [lindex $_buttonList [index $index]]
    
    set retstr [uplevel $itk_component($tag) configure $args]
    
    _setBoxSize
    
    return $retstr
}

# ------------------------------------------------------------------
# METHOD: buttonccget index option
#
# Return value of option for push button given by index.  Option may
# have any of the values accepted by the add method.
# ------------------------------------------------------------------
body iwidgets::Buttonbox::buttoncget {index option} {
    set tag [lindex $_buttonList [index $index]]
    
    set retstr [uplevel $itk_component($tag) cget [list $option]]
    
    return $retstr
}

# -----------------------------------------------------------------
# PRIVATE METHOD: _getMaxWidth
#
# Returns the required width of the largest button.
# -----------------------------------------------------------------
body iwidgets::Buttonbox::_getMaxWidth {} {
    set max 0
    
    foreach tag $_displayList {
	set w [winfo reqwidth $itk_component($tag)]
	
	if {$w > $max} {
	    set max $w
	}
    }
    
    return $max
}

# -----------------------------------------------------------------
# PRIVATE METHOD: _getMaxHeight
#
# Returns the required height of the largest button.
# -----------------------------------------------------------------
body iwidgets::Buttonbox::_getMaxHeight {} {
    set max 0
    
    foreach tag $_displayList {
	set h [winfo reqheight $itk_component($tag)]
	
	if {$h > $max} {
	    set max $h
	}
    }
    
    return $max
}

# ------------------------------------------------------------------
# METHOD: _setBoxSize ?when?
#
# Sets the proper size of the frame surrounding all the buttons.
# If "when" is "now", the change is applied immediately.  If it is 
# "later" or it is not specified, then the change is applied later, 
# when the application is idle.
# ------------------------------------------------------------------
body iwidgets::Buttonbox::_setBoxSize {{when later}} {
    if {[winfo ismapped $itk_component(hull)]} {
	if {$when == "later"} {
	    if {$_resizeFlag == ""} {
		set _resizeFlag [after idle [code $this _setBoxSize now]]
	    }
	    return
	} elseif {$when != "now"} {
	    error "bad option \"$when\": should be now or later"
	}

	set _resizeFlag ""

	set numBtns [llength $_displayList]
	
	if {$itk_option(-orient) == "horizontal"} {
	    set minw [expr $numBtns * [_getMaxWidth] \
		    + ($numBtns+1) * $itk_option(-padx)]
	    set minh [expr [_getMaxHeight] + 2 * $itk_option(-pady)]
	    
	} else {
	    set minw [expr [_getMaxWidth] + 2 * $itk_option(-padx)]
	    set minh [expr $numBtns * [_getMaxHeight] \
		    + ($numBtns+1) * $itk_option(-pady)]
	}
	
	#
	# Remove the configure event bindings on the hull while we adjust the
	# width/height and re-position the buttons.  Once we're through, we'll
	# update and reinstall them.  This prevents double calls to position
	# the buttons.
	#
	set tags [bindtags $itk_component(hull)]
	if {[set i [lsearch $tags bbox-config]] != -1} {
	    set tags [lreplace $tags $i $i]
	    bindtags $itk_component(hull) $tags
	}
	
	component hull configure -width $minw -height $minh
	
	update idletasks
	    
	_positionButtons
	
	bindtags $itk_component(hull) [linsert $tags 0 bbox-config]
    }
}
    
# ------------------------------------------------------------------
# METHOD: _positionButtons
# 
# This method is responsible setting the width/height of all the 
# displayed buttons to the same value and for placing all the buttons
# in equidistant locations.
# ------------------------------------------------------------------
body iwidgets::Buttonbox::_positionButtons {} {
    set bf $itk_component(hull)
    set numBtns [llength $_displayList]
    
    # 
    # First, determine the common width and height for all the 
    # displayed buttons.
    #
    if {$numBtns > 0} {
	set bfWidth [winfo width $itk_component(hull)]
	set bfHeight [winfo height $itk_component(hull)]
	
	if {$bfWidth >= [winfo reqwidth $itk_component(hull)]} {
	    set _btnWidth [_getMaxWidth] 
	    
	} else {
	    if {$itk_option(-orient) == "horizontal"} {
		set _btnWidth [expr $bfWidth / $numBtns]
	    } else {
		set _btnWidth $bfWidth
	    }
	}	    
	
	if {$bfHeight >= [winfo reqheight $itk_component(hull)]} {
	    set _btnHeight [_getMaxHeight]
	    
	} else {
	    if {$itk_option(-orient) == "vertical"} {
		set _btnHeight [expr $bfHeight / $numBtns]
	    } else {
		set _btnHeight $bfHeight
	    }
	}	    
    }
    
    #
    # Place the buttons at the proper locations.
    #
    if {$numBtns > 0} {
	if {$itk_option(-orient) == "horizontal"} {
	    set leftover [expr [winfo width $bf] \
		    - 2 * $itk_option(-padx) - $_btnWidth * $numBtns]
	    
	    if {$numBtns > 0} {
		set offset [expr $leftover / ($numBtns + 1)]
	    } else {
		set offset 0
	    }
	    if {$offset < 0} {set offset 0}
	    
	    set xDist [expr $itk_option(-padx) + $offset]
	    set incrAmount [expr $_btnWidth + $offset]
	    
	    foreach button $_displayList {
		place $itk_component($button) -anchor w \
			-x $xDist -rely .5 -y 0 -relx 0 \
			-width $_btnWidth -height $_btnHeight
		
		set xDist [expr $xDist + $incrAmount]
	    }
	    
	} else {
	    set leftover [expr [winfo height $bf] \
		    - 2 * $itk_option(-pady) - $_btnHeight * $numBtns]
	    
	    if {$numBtns > 0} {
		set offset [expr $leftover / ($numBtns + 1)]
	    } else {
		set offset 0
	    }
	    if {$offset < 0} {set offset 0}
	    
	    set yDist [expr $itk_option(-pady) + $offset]
	    set incrAmount [expr $_btnHeight + $offset]
	    
	    foreach button $_displayList {
		place $itk_component($button) -anchor n \
			-y $yDist -relx .5 -x 0 -rely 0 \
			-width $_btnWidth -height $_btnHeight
		
		set yDist [expr $yDist + $incrAmount]
	    }
	}
    }
}