--- a/gamma.tk	Mon Oct 16 00:49:43 2006 +0200
+++ b/gamma.tk	Sun Oct 22 12:23:15 2006 +0200
@@ -1,16 +1,74 @@
 #!/bin/wish
 
+set wheight 400
+set wwidth 800
+set wwidthsingle [expr $wwidth / 3 ]
+set gradient 5
+
+# Aquest -2 és perque els butons, per alguna raó, són 2 pixels més alts i
+# amples.
+set wheightsingle [expr $wheight / $gradient - 2]
+
+proc stepvalue { min max step } {
+	global gradient
+	return [expr $min + ( ( $max - $min ) * $step / ($gradient - 1) )]
+}
+
+proc color { r g b } {
+	return [format "#%04x%04x%04x" $r $g $b]
+}
+
+# Build the labels
+
+# Left
 frame .leftcol
-label .leftcol.c -height 100 -width 50 -bg #12f -bitmap @gray50.xbm
+label .leftcol.c -height $wheight -width $wwidthsingle -bg #12f \
+	-bitmap @gray50.xbm -borderwidth 0
 pack .leftcol.c
+
+# Center
 frame .centercol
-button .centercol.b -height 100 -width 50 -bg #f21 -fg #f21 -bitmap gray50
-pack .centercol.b
+for {set i 0} {$i < $gradient} {incr i} {
+	set r [stepvalue 0 65535 $i]
+	set g $r 
+	set b $r 
+	button .centercol.b$i -height $wheightsingle -width $wwidthsingle \
+		-bg [color $r $g $b]  -bitmap gray50 -borderwidth 0 \
+		-highlightthickness 0 -command "selection $i"
+	pack .centercol.b$i -side top
+}
+
+# Right
 frame .rightcol
-label .rightcol.c -height 100 -width 50 -bg #5f6 -bitmap @gray50.xbm
+label .rightcol.c -height $wheight -width $wwidthsingle -bg #f12 \
+	-bitmap @gray50.xbm -borderwidth 0
 pack .rightcol.c
 
 pack .leftcol -side left
 pack .centercol -side left
 pack .rightcol -side left
 
+
+# Global variables
+
+# Loop functions
+
+# Returns { min_r max_r min_g max_g min_b max_b }
+set min_r 0
+set max_r 65535
+set min_g 0
+set max_g 0
+set min_b 0
+set max_b 0
+
+proc getnext { } {
+}
+
+proc prepare_colors { } {
+	global min_r max_r min_g max_g min_b max_b
+}
+
+proc selection { i } {
+	puts $i
+}
+