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# copyright (C) 1997-2005 Jean-Luc Fontaine (mailto:jfontain@free.fr)
# this program is free software: please read the COPYRIGHT file enclosed in this package or use the Help Copyright menu
# $Id: bgchoose.tcl,v 1.11 2005/01/02 00:45:07 jfontain Exp $
class backgroundChooser {
set (positions) [list [mc center] [mc {upper left}]]
set (positionCodes) [list {} nw] ;# as in grid command
proc backgroundChooser {this parentPath args} composite {[new frame $parentPath] $args} {
set path $widget::($this,path)
set ($this,imageButton) [checkbutton $path.imageButton\
-text [mc {Image file:}] -variable backgroundChooser::($this,useImage)\
-command "composite::configure $this -useimage \$backgroundChooser::($this,useImage)"\
]
grid $($this,imageButton) -row 0 -column 0 -padx 2 -sticky e
set ($this,imageEntry) [entry $path.imageFile -textvariable backgroundChooser::($this,imageFile)]
grid $($this,imageEntry) -row 0 -column 1 -columnspan 2 -padx 2 -sticky ew
set ($this,imageChoose) [button $path.imageChoose -text [mc Choose]... -command "backgroundChooser::inquireImageFile $this"]
grid $($this,imageChoose) -row 0 -column 3 -padx 2 -sticky w
set ($this,positionsLabel) [label $path.positionsLabel -text [mc {Image position:}]]
grid $($this,positionsLabel) -row 1 -column 0 -padx 2 -sticky e
set entry [new comboEntry $path -editable 0 -command "backgroundChooser::setImagePosition $this" -list $(positions)]
composite::configure $entry entry -textvariable backgroundChooser::($this,position)
composite::configure $entry button -listheight [llength $(positions)]
composite::configure $entry button scroll -selectmode single
set ($this,imagePositions) $entry
grid $widget::($($this,imagePositions),path) -row 1 -column 1 -padx 2 -sticky w
set ($this,window) [new window $path]
grid $widget::($($this,window),path) -row 1 -column 2 -rowspan 2 -columnspan 2 -padx 5 -pady 5 -sticky e
set ($this,colorButton) [button $path.colorButton -text [mc Color]... -command "backgroundChooser::inquireColor $this"]
grid $($this,colorButton) -row 2 -column 1 -padx 2
grid columnconfigure $path 2 -weight 1
set ($this,image) {}
composite::complete $this
}
proc ~backgroundChooser {this} {
if {[string length $($this,image)] > 0} {image delete $($this,image)}
delete $($this,window)
}
proc options {this} {
set list [list [list [mc {image files}] .gif]]
return [list\
[list -color white]\
[list -font $widget::option(label,font)]\
[list -imagefile {}]\
[list -imagefiletypes $list $list]\
[list -position {}]\
[list -targetsize {0 0} {0 0}]\
[list -useimage 0]\
]
}
proc set-color {this value} {
$($this,colorButton) configure -background $value -foreground [visibleForeground $value]
composite::configure $($this,window) -background $value
}
proc set-font {this value} {
foreach path [list $($this,positionsLabel) $($this,imageButton) $($this,imageEntry)] {
$path configure -font $value
}
composite::configure $($this,imagePositions) -font $value
}
proc set-imagefile {this value} {
set ($this,imageFile) $value
if {[string length $($this,image)] > 0} {
image delete $($this,image)
set ($this,image) {}
}
if {[string length $value] > 0} {
set ($this,image) [image create photo -file $value]
}
if {$composite::($this,-useimage)} {
composite::configure $($this,window) -image $($this,image)
} else {
composite::configure $($this,window) -image {}
}
}
proc set-position {this value} {
set index [lsearch -exact $(positionCodes) $value]; if {$index < 0} {set index 0}
set ($this,position) [lindex $(positions) $index]
composite::configure $($this,window) -position $value
}
proc set-targetsize {this value} {
composite::configure $($this,window) -size $value
}
proc set-useimage {this value} {
set ($this,useImage) $value
if {$value} {
$($this,imageEntry) configure -state normal
$($this,imageChoose) configure -state normal
composite::configure $($this,imagePositions) -state normal
composite::configure $($this,window) -image $($this,image)
} else {
$($this,imageEntry) configure -state disabled
$($this,imageChoose) configure -state disabled
composite::configure $($this,imagePositions) -state disabled
composite::configure $($this,window) -image {}
}
}
proc inquireImageFile {this} {
set name $composite::($this,-imagefile)
if {[string length $name] == 0} {
set directory .
} else {
set directory [file dirname $name]; set name [file tail $name]
}
set file [tk_getOpenFile\
-title [mc {moodss: Image File}] -parent $widget::($this,path) -initialdir $directory -initialfile $name\
-filetypes $composite::($this,-imagefiletypes)\
] ;# note: returns the full pathname or nothing
if {[string length $file] > 0} { ;# not canceled
composite::configure $this -imagefile $file
}
}
proc inquireColor {this} {
set color [tk_chooseColor\
-title [mc {Choose background color:}] -parent $widget::($this,path) -initialcolor $composite::($this,-color)\
]
if {[string length $color] > 0} {
composite::configure $this -color $color
}
}
proc setImagePosition {this position} {
set index [lsearch -exact $(positions) $position]; if {$index < 0} {set index 0}
composite::configure $this -position [lindex $(positionCodes) $index]
}
proc applyFileEntry {this} { ;# public procedure: synchronize file entry in case of manual input from user
composite::configure $this -imagefile $($this,imageFile)
}
}
class backgroundChooser {
class window {
proc window {this parentPath args} composite {[new frame $parentPath -background black] $args} {
set ($this,frame) [frame $widget::($this,path).frame]
set ($this,label) [label $($this,frame).label -borderwidth 0]
pack $($this,frame) -fill both -padx 1 -pady 1
composite::complete $this
}
proc ~window {this} {
if {[info exists ($this,image)]} {image delete $($this,image)}
}
proc options {this} {
return [list\
[list -background white]\
[list -image {} {}]\
[list -position {} {}]\
[list -size [list [winfo screenwidth .] [winfo screenheight .]]]\
]
}
proc set-background {this value} {
$($this,frame) configure -background $value
$($this,label) configure -background $value
}
proc set-size {this value} { ;# target window width and height
update $this
}
proc set-image {this value} {
update $this
}
proc set-position {this value} {
update $this
}
proc update {this} { ;# possibly update image size and position
set scale 10.0 ;# must be a double
foreach {width height} $composite::($this,-size) {}
$($this,frame) configure -width [expr {round($width / $scale)}] -height [expr {round($height / $scale)}]
if {[info exists ($this,image)]} {
image delete $($this,image)
unset ($this,image)
}
set image $composite::($this,-image)
if {[string length $image] == 0} {
place forget $($this,label)
return
}
set ($this,image) [image create photo]
$($this,image) copy $image -subsample [expr {round($scale)}]\
-to 0 0 [expr {round([image width $image] / $scale)}] [expr {round([image height $image] / $scale)}]
$($this,label) configure -image $($this,image)
switch $composite::($this,-position) {
nw { ;# upper left corner
place $($this,label) -anchor nw -relx 0 -rely 0
}
default { ;# centered
place $($this,label) -anchor center -relx 0.5 -rely 0.5
}
}
}
}
}
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