# these simple samples have been developped by C. Mertz mertz@cena.fr in perl
# tcl version by Jean-Paul Imbert imbert@cena.fr

if {![info exists zincDemo]} {
    error "This script should be run from the zinc-widget demo."
}


set w .groupsPriority
catch {destroy $w}
toplevel $w
wm title $w "Zinc Groups priority Demonstration"
wm iconname $w Groups

set defaultfont "-adobe-helvetica-bold-r-normal-*-120-*-*-*-*-*-*"

frame $w.buttons
pack $w.buttons -side bottom -fill x -pady 2m
button $w.buttons.dismiss -text Dismiss -command "destroy $w"
button $w.buttons.code -text "See Code" -command "showCode $w"
pack $w.buttons.dismiss $w.buttons.code -side left -expand 1


###########################################
# Text zone
###########################################

text $w.text -relief sunken -borderwidth 2 -height 12
pack $w.text -expand yes -fill both

$w.text insert end "There are two groups (a red one and a green one) each containing\n4 rectangles. Those rectangles display their current priority.\nThe following operations are possible:\n Mouse Button 1 for dragging objects.\n Mouse Button 2 for dragging a colored group.\n Key + on a rectangle to raise it inside its group.\n Key - on a rectangle to lower it inside its group.\n Key l on a rectangle to lower its colored group.\n Key r on a rectangle to raise its colored group.\n Key t on a rectangle to change its group (but not its color!).\n Key 0-9 on a rectangle to set the priority to 0-9\nRaising or lowering an item inside a group modify its priority if necessary"

###########################################
# Zinc
###########################################
set zinc_width 600
set zinc_height 500
zinc $w.zinc -width $zinc_width -height $zinc_height -font 10x20 -borderwidth 3 -relief sunken
pack $w.zinc

#########################################################################"
# Creating the redish group
set group1 [$w.zinc add group 1 -visible 1]

set counter 0 
# Adding 4 rectangles with text to redish group
foreach data { {200 100 red} {210 210 red1} {390 110 red2} {395 215 red3} } {
    set counter [expr $counter+ 2]
    set centerx [lindex $data 0]
    set centery [lindex $data 1]
    set color [lindex $data 2]

    # this small group is for merging together :
    # the rectangle and the text showing its name
    set g [$w.zinc add group $group1 -visible 1 -atomic 1 -sensitive 1 -priority $counter]
    set rec [$w.zinc add rectangle $g "[expr $centerx-100] [expr $centery-60] [expr $centerx+100] [expr $centery+60]" -fillcolor $color -filled 1]

    set txt [$w.zinc add "text" $g -position "$centerx $centery" -text "pri=$counter" -anchor center]

    # Some bindings for dragging the rectangle or the full group
    $w.zinc bind $g <1> "itemStartDrag $g %x %y" 
    $w.zinc bind $g <B1-Motion> "itemDrag $g %x %y"
    $w.zinc bind $g <2> "itemStartDrag $g %x %y" 
    $w.zinc bind $g <B2-Motion> "groupDrag $g %x %y"
}

#########################################################################"
# Creating the greenish group
set group2 [$w.zinc add group 1 -visible 1]
set counter 0

# Adding 4 rectangles with text to greenish group
foreach data {{200 300 green1} {210 410 green2} {390 310 green3} {395 415 green4}} {
    incr counter
    set centerx [lindex $data 0]
    set centery [lindex $data 1]
    set color [lindex $data 2]

    # this small group is for merging together a rectangle
    # and the text showing its priority
    set g [$w.zinc add group $group2 -atomic 1 -sensitive 1 -priority $counter]

    set rec [$w.zinc add rectangle $g "[expr $centerx-100] [expr $centery-60] [expr $centerx+100] [expr $centery+60]" -fillcolor $color -filled 1]

    set txt [$w.zinc add text $g -position "$centerx $centery" -text "pri=$counter" -anchor center]

    # Some bindings for dragging the rectangle or the full group
    $w.zinc bind $g <1> "itemStartDrag $g %x %y" 
    $w.zinc bind $g <B1-Motion> "itemDrag $g %x %y"
    $w.zinc bind $g <2> "itemStartDrag $g %x %y" 
    $w.zinc bind $g <B2-Motion> "groupDrag $g %x %y"
}


#########################################################################"
# adding the key bindings

# the focus on the widget is ABSOLUTELY necessary for key bindings!
focus $w.zinc

bind $w.zinc <KeyPress-r> raiseGroup
bind $w.zinc <KeyPress-l> lowerGroup
bind $w.zinc <KeyPress-plus> raise

bind $w.zinc <KP_Add> raise
bind $w.zinc <KeyPress-minus> lower
bind $w.zinc <KP_Subtract> lower
bind $w.zinc <KeyPress-t> toggleItemGroup

for {set i 0} {$i<=9} {incr i} {
    bind $w.zinc <KeyPress-$i> "setPriorrity $i"
    bind $w.zinc <KeyPress-KP_$i> "setPriorrity $i"
}

# The following binding is currently not possible only text items
# with focus can get a KeyPress or KeyRelease event
# $zinc->bind($g '<KeyPress>' [\&raise $g]

####################################withtype#####################################"
# Definition of all callbacks


proc updateLabel {group} {
    global w
    set priority [$w.zinc itemcget $group -priority]
    # we get the text item from this group:
    set textitem [$w.zinc find withtype text ".$group."]
    $w.zinc itemconfigure $textitem -text "pri=$priority"
}

proc setPriorrity {priority} {
    global w
    set item [$w.zinc find withtag current]
    #return unless $item
    $w.zinc itemconfigure $item -priority $priority
    updateLabel $item
}


# Callback to lower a small group of a rectangle and a text
proc lower {} {
    global w
    # to get the item under the cursor!
    set item [$w.zinc find withtag current]
    #return unless $item
    $w.zinc lower $item
    updateLabel $item
}


# Callback to raise a small group of a rectangle and a text
proc raise {} {
    global w
    # to get the item under the cursor!
    set item [$w.zinc find withtag current]
    #return unless $item
    $w.zinc raise $item
    updateLabel $item
}

# Callback to raise the group of groups of a rectangle and a text
proc lowerGroup {} {
    global w 
    # to get the item under the cursor!
    set item [$w.zinc find withtag current]
    #return unless $item
    set coloredGroup [$w.zinc group $item]
    $w.zinc lower $coloredGroup
}

# Callback to raise the group of groups of a rectangle and a text
proc raiseGroup {} {
    global w
    # to get the item under the cursor!
    set item [$w.zinc find withtag current]
    #return unless $item
    set coloredGroup [$w.zinc group $item]
    $w.zinc raise $coloredGroup
    updateLabel $item
}

# Callback to change  puts raise
#the group of groups of a rectangle and a text
proc toggleItemGroup {} {
    global group1
    global group2
    global w

    # to get the item under the cursor!
    set item [$w.zinc find withtag current]
    
    # return unless $item
    set newgroup ""
    if {$group1 == [$w.zinc group $item]} {
	set newgroup $group2
    } else {
	set newgroup $group1
    }
    $w.zinc chggroup $item $newgroup 1
    updateLabel $item
}

# callback for starting a drag
set x_orig ""
set y_orig ""

proc itemStartDrag {item x y} {
    global x_orig y_orig
    set x_orig $x
    set y_orig $y
}

# Callback for moving an item
proc itemDrag {item x y} {
    global x_orig y_orig
    global w 
    $w.zinc translate $item [expr $x-$x_orig] [expr $y-$y_orig];
    set x_orig $x;
    set y_orig $y;
}

# Callback for moving an item
proc groupDrag {item x y} {
    global x_orig y_orig
    global w
    set coloredGroup [$w.zinc group $item]
    $w.zinc translate $coloredGroup [expr $x-$x_orig] [expr $y-$y_orig];
    set x_orig $x;
    set y_orig $y;
}