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# -*- mode: TCL; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
#
# $Id: IconView.tcl,v 1.2 2001/12/09 05:04:02 idiscovery Exp $
#
# IconView.tcl --
#
# This file implements the Icon View widget: the "icon" view mode of
# the MultiView widget. It implements:
#
# (1) Creation of the icons in the canvas subwidget.
# (2) Automatic arrangement of the objects
#
# Copyright (c) 1993-1999 Ioi Kim Lam.
# Copyright (c) 2000-2001 Tix Project Group.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
tixWidgetClass tixIconView {
-classname TixIconView
-superclass tixCObjView
-method {
add arrange
}
-flag {
-autoarrange
}
-static {
}
-configspec {
{-autoarrange autoArrange AutoArrange 0 tixVerifyBoolean}
}
-default {
{.scrollbar auto}
{*borderWidth 1}
{*canvas.background #c3c3c3}
{*canvas.highlightBackground #d9d9d9}
{*canvas.relief sunken}
{*canvas.takeFocus 1}
{*Scrollbar.takeFocus 0}
}
-forcecall {
}
}
proc tixIconView:ConstructWidget {w} {
upvar #0 $w data
tixChainMethod $w ConstructWidget
}
proc tixIconView:SetBindings {w} {
upvar #0 $w data
tixChainMethod $w SetBindings
set c $data(w:canvas)
bind $c <1> "tixIconView:StartDrag $w %x %y"
bind $c <B1-Motion> "tixIconView:Drag $w %x %y"
bind $c <ButtonRelease-1> "tixIconView:EndDrag $w"
}
proc tixIconView:StartDrag {w x y} {
upvar #0 $w data
global lastX lastY
set c $data(w:canvas)
$c raise current
set lastX [$c canvasx $x]
set lastY [$c canvasy $y]
}
proc tixIconView:Drag {w x y} {
upvar #0 $w data
global lastX lastY
set c $data(w:canvas)
set x [$c canvasx $x]
set y [$c canvasy $y]
$c move current [expr $x-$lastX] [expr $y-$lastY]
set lastX $x
set lastY $y
}
proc tixIconView:EndDrag {w} {
upvar #0 $w data
tixCallMethod $w adjustscrollregion
}
#----------------------------------------------------------------------
#
# option configs
#----------------------------------------------------------------------
proc tixIconView:add {w tag image text} {
upvar #0 $w data
set cmp [image create compound -window $data(w:canvas)]
$cmp add image -image $image
$cmp add line
$cmp add text -text $text
set id [$data(w:canvas) create image 0 0 -image $cmp -anchor nw]
$data(w:canvas) addtag $tag withtag $id
if {$data(-autoarrange)} {
tixWidgetDoWhenIdle tixIconView:Arrange $w 1
}
}
# Do it in an idle handler, so that Arrange is not called before the window
# is properly mapped.
#
proc tixIconView:arrange {w} {
tixWidgetDoWhenIdle tixIconView:Arrange $w 1
}
proc tixIconView:PackOneRow {w row y maxH bd padX padY} {
upvar #0 $w data
set iX [expr $bd+$padX]
foreach i $row {
set box [$data(w:canvas) bbox $i]
set W [expr [lindex $box 2]-[lindex $box 0]+1]
set H [expr [lindex $box 3]-[lindex $box 1]+1]
set iY [expr $y + $maxH - $H]
$data(w:canvas) coords $i $iX $iY
incr iX [expr $W+$padX]
}
}
# virtual method
#
proc tixIconView:PlaceWindow {w} {
upvar #0 $w data
if {$data(-autoarrange)} {
tixWidgetDoWhenIdle tixIconView:Arrange $w 0
}
tixChainMethod $w PlaceWindow
}
proc tixIconView:Arrange {w adjust} {
upvar #0 $w data
set padX 2
set padY 2
tixIconView:ArrangeGrid $w $padX $padY
if {$adjust} {
tixCallMethod $w adjustscrollregion
}
}
# the items are not packed
#
proc tixIconView:ArrangeGrid {w padX padY} {
upvar #0 $w data
set maxW 0
set maxH 0
foreach item [$data(w:canvas) find all] {
set box [$data(w:canvas) bbox $item]
set itemW [expr [lindex $box 2]-[lindex $box 0]+1]
set itemH [expr [lindex $box 3]-[lindex $box 1]+1]
if {$maxW < $itemW} {
set maxW $itemW
}
if {$maxH < $itemH} {
set maxH $itemH
}
}
if {$maxW == 0 || $maxH == 0} {
return
}
set winW [tixWinWidth $data(w:canvas)]
set bd [expr [$data(w:canvas) cget -bd]+\
[$data(w:canvas) cget -highlightthickness]]
set cols [expr $winW / ($maxW+$padX)]
if {$cols < 1} {
set cols 1
}
set y $bd
set c 0
set x $bd
foreach item [$data(w:canvas) find all] {
set box [$data(w:canvas) bbox $item]
set itemW [expr [lindex $box 2]-[lindex $box 0]+1]
set itemH [expr [lindex $box 3]-[lindex $box 1]+1]
set iX [expr $x + $padX + ($maxW-$itemW)/2]
set iY [expr $y + $padY + ($maxH-$itemH) ]
$data(w:canvas) coords $item $iX $iY
incr c
incr x [expr $maxW + $padY]
if {$c == $cols} {
set c 0
incr y [expr $maxH + $padY]
set x $bd
}
}
}
# the items are packed
#
proc tixIconView:ArrangePack {w padX padY} {
upvar #0 $w data
set winW [tixWinWidth $data(w:canvas)]
set bd [expr [$data(w:canvas) cget -bd]+\
[$data(w:canvas) cget -highlightthickness]]
set y [expr $bd + $padY]
set maxH 0
set usedW $padX
set row ""
foreach item [$data(w:canvas) find all] {
set box [$data(w:canvas) bbox $item]
set itemW [expr [lindex $box 2]-[lindex $box 0]+1]
set itemH [expr [lindex $box 3]-[lindex $box 1]+1]
if {[expr $usedW + $itemW] > $winW} {
if {$row == ""} {
# only one item in this row
#
$data(w:canvas) coords $item [expr $bd + $padX] $y
incr y [expr $itemH+$padY]
continue
} else {
# this item is not in this row. Arrange the previous items
# first
#
tixIconView:PackOneRow $w $row $y $maxH $bd $padX $padY
incr y $maxH
set row ""
set maxH 0
set usedW $padX
}
}
lappend row $item
if {$maxH < $itemH} {
set maxH $itemH
}
incr usedW [expr $padX+$itemW]
}
if {$row != ""} {
tixIconView:PackOneRow $w $row $y $maxH $bd $padX $padY
}
}
#----------------------------------------------------------------------
#
# Widget commands
#----------------------------------------------------------------------
#----------------------------------------------------------------------
#
# Private Methods
#----------------------------------------------------------------------
........