Tk 实例：Bitmap Editor
标签：
tcltk
# 2007-11-19 14:45:36 by Sean Zhang
这是一个用来创作和编辑bitmap的程序，用Tk写成。
程序来自于 http://wiki.tcl.tk/6298
Tk 还是挺强大的吧。:)
程序源码
#!/bin/sh
# The next line is executed by /bin/sh, but not tcl \
exec wish $0 ${1+"$@"}
##+##########################################################################
#
# bitmap.tcl -- simple bitmap editor
# by Keith Vetter
#
# Revisions:
# KPV Jan 15, 2003 - initial revision
# KPV Mar 06, 2003 - added functions like shift, clear, invert and resize
#
##+##########################################################################
#############################################################################
package require Tk
set S(cell) 10
set S(prog) "Bitmap Editor"
set S(fname) ""
array set bits { 0 0000 1 1000 2 0100 3 1100 4 0010 5 1010 6 0110 7 1110
8 0001 9 1001 a 0101 b 1101 c 0011 d 1011 e 0111 f 1111}
set bitmap {
#define bullet_width 11
#define bullet_height 9
static char bullet_bits[] = {
0x00,0x00, 0x00,0x00, 0x70,0x00, 0xf8,0x00, 0xf8,0x00,
0xf8,0x00, 0x70,0x00, 0x00,0x00, 0x00,0x00
}
}
##+##########################################################################
#
# DoDisplay -- sets up our display
#
proc DoDisplay {} {
wm title . $::S(prog)
canvas .c -width 500 -height 500 -bd 2 -relief ridge -highlightthickness 0
.c xview moveto 0 ; .c yview moveto 0
bind .c <2> [bind Text <2>] ;# Enable button 2 paning
bind .c <B2-Motion> [bind Text <B2-Motion>]
frame .fctrl -bd 2 -relief ridge
label .info -text "Left button to set Right button to clear" -anchor c \
-bd 2 -relief ridge
grid .c .fctrl -sticky news -row 0
grid .info ^ -sticky ew
grid rowconfigure . 0 -weight 1
grid columnconfigure . 0 -weight 1
DoControl
DoMenus
update
}
##+##########################################################################
#
# DoMenus -- sets up our menus
#
proc DoMenus {} {
. configure -menu [menu .m -tearoff 0]
.m add cascade -menu [menu .m.file -tearoff 0] -label "File" -underline 0
.m add cascade -menu [menu .m.image -tearoff 0] -label "Image" -underline 0
.m add cascade -menu [menu .m.help -tearoff 0] -label "Help" -underline 0
.m.file add command -label "New" -under 0 -command NewBMP
.m.file add command -label "Open" -under 0 -command OpenBMP
.m.file add command -label "Save" -under 0 -command SaveBMP
.m.file add separator
.m.file add command -label "Copy" -under 0 -command CopyBMP
.m.file add separator
.m.file add command -label Exit -under 1 -command exit
.m.image add command -label "Clear" -under 0 -command {BitFunc clear}
.m.image add command -label "Invert" -under 0 -command {BitFunc invert}
.m.image add command -label "Shift left" -under 6 -command {BitFunc sleft}
.m.image add command -label "Shift right" -under 6 -command {BitFunc sright}
.m.image add command -label "Shift up" -under 6 -command {BitFunc sup}
.m.image add command -label "Shift down" -under 6 -command {BitFunc sdown}
.m.image add separator
.m.image add command -label "Resize" -under 0 -command ResizeBMP
.m.help add command -label About -under 0 -command About
}
##+##########################################################################
#
# DoControl -- draws the control panel
#
proc DoControl {} {
grid rowconfigure .fctrl 0 -minsize 10
grid rowconfigure .fctrl 100 -weight 1
frame .fctop
grid .fctop - - -in .fctrl -row 1
set row 0
foreach a {Name Width Height} {
set a2 [string map {" " ""} [string tolower $a]]
label .l$a2 -text "$a:"
entry .e$a2 -textvariable BM($a2) -width 8 -state disabled
grid .l$a2 .e$a2 -in .fctop -row [incr row]
}
image create bitmap ::img::current
frame .fimg -bd 2 -relief sunken -padx 10 -pady 10
label .limg -image ::img::current -bg white
grid rowconfigure .fctrl 40 -minsize 50
grid .fimg - - -in .fctrl -row 41
pack .limg -in .fimg -expand 1
}
##+##########################################################################
#
# ShowBMP -- computes grid size then draws in the current bitmap
#
proc ShowBMP {} {
global S BM
if {! [info exists BM(raw)]} return
set w [winfo width .c] ; set h [winfo height .c]
set cw [expr {int((($w - 20) / $BM(width)))}]
set ch [expr {int((($h - 20) / $BM(height)))}]
set S(cell) [expr {$cw < $ch ? $cw : $ch}]
if {$S(cell) > 40} { set S(cell) 40}
if {$S(cell) < 5} { set S(cell) 5}
DrawGrid
ShowBits
unset BM(bits)
::img::current config -data $BM(raw) ;# Update current bitmap display
}
##+##########################################################################
#
# ClearBMP -- clears everything for a new bitmap
#
proc ClearBMP {} {
global BM
.c delete all
::img::current config -data {}
array unset BM
foreach arr [array names BM] { set BM($arr) ""}
update
}
##+##########################################################################
#
# DrawGrid -- draws the grid of rectangles--each one with proper bindings
#
proc DrawGrid {} {
global BM
.c delete all
foreach {l t} [CellXY 0 0] break
foreach {b r} [CellXY $BM(height) $BM(width)] break
.c create rect $l $t $b $r -tag outline -width 2
set bg [.c cget -bg]
for {set r 0} {$r < $BM(height)} {incr r} {
for {set c 0} {$c < $BM(width)} {incr c} {
.c create rect [CellXY $r $c] -tag [list grid c($r,$c)] -fill $bg
.c bind c($r,$c) <1> [list Click 1 cell $r $c]
.c bind c($r,$c) <3> [list Click 2 cell $r $c]
}
}
.c config -scrollregion [.c bbox all]
}
##+##########################################################################
#
# Click -- handles left and right mouse click in a grid cell
#
proc Click {btn what row col} {
global BM
if {$btn == 1} { ;# Set the pixel
if {$BM(b,$row,$col)} return ;# Already set
set BM(b,$row,$col) 1
ShowBitCell $row $col
} else { ;# Clear the pixel
if {! $BM(b,$row,$col)} return ;# Already cleare
set BM(b,$row,$col) 0
.c delete o($row,$col)
}
set BM(raw) [UnparseBMP]
::img::current config -data $BM(raw)
}
##+##########################################################################
#
# ShowBits -- draws dots in all "on" cells in the current bitmap,
# only valid after ParseBMP fills in the BM(bits) variable.
#
proc ShowBits {} {
global BM bits
set row 0
set col 0
foreach byte $BM(bits) {
foreach {n1 n2} [split $byte ""] break ;# Get each nibble
foreach bit [split "$bits($n2)$bits($n1)" ""] { ;# Note the endian
set BM(b,$row,$col) $bit
if {$bit} {
ShowBitCell $row $col
}
if {[incr col] >= $BM(width)} { ;# Do we past the last column?
incr row
set col 0
break
}
}
}
}
##+##########################################################################
#
# ShowBitCell -- draws the "on" bit in a specified cell
#
proc ShowBitCell {row col} {
.c create oval [CellXY $row $col] -fill black -tag [list bit o($row,$col)]
.c bind o($row,$col) <1> [list Click 1 oval $row $col]
.c bind o($row,$col) <3> [list Click 2 oval $row $col]
}
##+##########################################################################
#
# CellXY -- returns the coordinates of a grid cell
#
proc CellXY {r c} {
global S
set x1 [expr {10 + $c * $S(cell)}]
set y1 [expr {10 + $r * $S(cell)}]
set x2 [expr {$x1 + $S(cell)}]
set y2 [expr {$y1 + $S(cell)}]
return [list $x1 $y1 $x2 $y2]
}
##+##########################################################################
#
# ParseBMP -- reads the raw bitmap data into our BM data structure
# NB. face.bmp in demo directory had defines for x_hot and y_hot
#
proc ParseBMP {raw} {
global S BM
ClearBMP
set BM(raw) $raw
while {1} {
if {! [regexp {\#define\s+(.*)_width} $raw => BM(name)]} break
if {! [regexp {\#define\s+.*_width\s*(\d*)} $raw => BM(width)]} break
if {! [regexp {\#define\s+.*_height\s*(\d*)} $raw => BM(height)]} break
regexp {\#define\s+.*_x_hot\s*(\d*)} $raw => BM(xhot)
regexp {\#define\s+.*_y_hot\s*(\d*)} $raw => BM(yhot)
if {! [regexp {(0x.*)\}} $raw => BM(bits)]} break
if {! [regsub -all {0x|,} $BM(bits) { } BM(bits)]} break
if {! [regsub -all {\s+} $BM(bits) { } BM(bits)]} break
set BM(bits) [string tolower $BM(bits)]
return ;# Everything ok, get out
}
ERROR "$S(fname) is not a proper bmp file"
ClearBMP
}
##+##########################################################################
#
# OpenBMP -- opens and reads a BMP file
#
proc OpenBMP {} {
global S
set types { {{BMP Files} {.bmp}} {{All Files} * }}
set fname [tk_getOpenFile -defaultextension ".bmp" -initialfile $S(fname) \
-filetypes $types]
if {$fname == ""} return
if {[catch {set FIN [open $fname r]} emsg]} {
ERROR "Cannot open $fname\n$emsg"
return
}
set raw [read $FIN]
close $FIN
set S(fname) $fname
ParseBMP $raw
ShowBMP
}
##+##########################################################################
#
# SaveBMP -- saves the current bitmap to a file
#
proc SaveBMP {} {
global S BM
if {! [info exists BM(raw)]} return
set types {{{BMP Files} {.bmp}} {{All Files} *}}
set fname [tk_getSaveFile -defaultextension ".bmp" -initialfile $S(fname) \
-filetypes $types]
if {$fname == ""} return
if {[catch {set FOUT [open $fname w]} emsg]} {
ERROR "Cannot open $fname\n$emsg"
return
}
puts $FOUT $BM(raw)
close $FOUT
set S(fname) $fname
}
##+##########################################################################
#
# UnparseBMP -- converts our internal BM into a proper bitmap data string
#
proc UnparseBMP {} {
global BM
set name $BM(name)
set bmp "\#define ${name}_width $BM(width)\n"
append bmp "\#define ${name}_height $BM(height)\n"
if {[info exists BM(xhot)]} {
append bmp "\#define ${name}_x_hot $BM(xhot)\n"
append bmp "\#define ${name}_y_hot $BM(yhot)\n"
}
append bmp "static char ${name}_bits[] = \{\n"
set bytes {}
for {set r 0} {$r < $BM(height)} {incr r} {
for {set c 0} {$c < $BM(width)} {incr c 8} {
set byte 0
for {set cc [expr {$c + 7}]} {$cc >= $c} {incr cc -1} {
set byte [expr {2 * $byte}]
if {[info exists BM(b,$r,$cc)] && $BM(b,$r,$cc)} {
incr byte
}
}
lappend bytes [format 0x%02x $byte]
}
}
append bmp " " [join $bytes ", "]
append bmp "\n\}"
return $bmp
}
##+##########################################################################
#
# CopyBMP -- copies current bitmap to the clipboard
#
proc CopyBMP {} {
global BM S
if {! [info exists BM(raw)]} return
clipboard clear
clipboard append $BM(raw)
tk_messageBox -icon info -title "$S(prog) Info" \
-message "Bitmap copied to the clipboard"
}
##+##########################################################################
#
# NewBMP -- creates a blank, new bitmap with sizes specified by the user
#
proc NewBMP {} {
global BM
set n [NewDlg]
if {$n == {}} return
foreach {name width height} $n break
ClearBMP
set BM(name) $name
set BM(width) $width
set BM(height) $height
for {set r 0} {$r < $BM(height)} {incr r} {
for {set c 0} {$c < $BM(width)} {incr c} {
set BM(b,$r,$c) 0
}
}
ParseBMP [UnparseBMP]
ShowBMP
}
proc ResizeBMP {} {
global BMP
set n [NewDlg 1]
if {$n == {}} return
foreach {. nwidth nheight} $n break
WidenBMP $nwidth
HeightenBMP $nheight
ParseBMP [UnparseBMP]
ShowBMP
}
proc WidenBMP {nwidth} {
global BM
if {$BM(width) == $nwidth} return
if {$nwidth > $BM(width)} {
foreach {low high delete} [list $BM(width) $nwidth 0] break
} else {
foreach {low high delete} [list $nwidth $BM(width) 1] break
}
for {set row 0} {$row < $BM(height)} {incr row} {
for {set col $low} {$col < $high} {incr col} {
set BM(b,$row,$col) 0
if {$delete} {
unset BM(b,$row,$col)
}
}
}
set BM(width) $nwidth
}
proc HeightenBMP {nheight} {
global BM
if {$BM(height) == $nheight} return
if {$nheight > $BM(height)} {
foreach {low high delete} [list $BM(height) $nheight 0] break
} else {
foreach {low high delete} [list $nheight $BM(height) 1] break
}
for {set col 0} {$col < $BM(width)} {incr col} {
for {set row $low} {$row < $high} {incr row} {
set BM(b,$row,$col) 0
if {$delete} {
unset BM(b,$row,$col)
}
}
}
set BM(height) $nheight
}
##+##########################################################################
#
# NewDlg -- asks the user for bitmap parameters
#
proc NewDlg {{resize 0}} {
global S NEW BM
destroy .new
toplevel .new -padx 10 -pady 5
wm title .new "New Bitmap"
if {$resize} {wm title .new "Resize Bitmap"}
wm geom .new "+[expr {[winfo x .] + 150}]+[expr {[winfo y .] + 100}]"
set NEW(ok) 0
set NEW(width) $BM(width)
set NEW(height) $BM(height)
frame .new.top -bd 2 -relief raised -padx 10 -pady 10
grid columnconfigure .new.top 1 -weight 1
set widgets {name width height}
if {$resize} {
set NEW(name) "xx"
set widgets {width height}
}
foreach a $widgets {
set a1 [string totitle $a]
label .new.l$a -text "$a1:"
entry .new.e$a -textvariable NEW($a)
grid .new.l$a .new.e$a -in .new.top -sticky ew
}
frame .new.buttons
button .new.ok -text Ok -width 10 -command ValidForm
button .new.cancel -text Cancel -width 10 -command {destroy .new}
pack .new.buttons -side bottom -pady 10
pack .new.top -side top -fill x
pack .new.cancel .new.ok -in .new.buttons -side right -padx 10 -expand 1
raise .new
set w ".new.e[lindex $widgets 0]"
focus $w
$w icursor end
$w selection range 0 end
tkwait window .new
if {$NEW(ok)} {
return [list $NEW(name) $NEW(width) $NEW(height)]
}
return {}
}
##+##########################################################################
#
# ValidForm -- validates the NewDlg and then destroys it if it is ok
#
proc ValidForm {} {
global NEW
foreach n {name width height} {
set NEW($n) [string trim $NEW($n)]
if {$NEW($n) == ""} return
}
if {![string is integer $NEW(width)]} return
if {![string is integer $NEW(height)]} return
set NEW(ok) 1
destroy .new
}
proc ERROR {msg} {
tk_messageBox -icon error -title "$::S(prog) Error" -message $msg
}
proc About {} {
set msg "$::S(prog)\n\nby Keith Vetter\nJanuary 2003"
tk_messageBox -title "About $::S(prog)" -message $msg -icon info
}
proc BitFunc {what} {
global BM
if {$what == "clear"} {
foreach arr [array names BM b,*] {
set BM($arr) 0
}
} elseif {$what == "invert"} {
foreach arr [array names BM b,*] {
set BM($arr) [expr {! $BM($arr)}]
}
} elseif {$what == "sleft"} { ;# Shift left
for {set col 0} {$col < $BM(width)} {incr col} {
set col2 [expr {$col + 1}]
for {set row 0} {$row < $BM(height)} {incr row} {
if {[info exists BM(b,$row,$col2)]} {
set BM(b,$row,$col) $BM(b,$row,$col2)
} else {
set BM(b,$row,$col) 0
}
}
}
} elseif {$what == "sright"} { ;# Shift right
for {set col [expr {$BM(width) - 1}]} {$col >= 0} {incr col -1} {
set col2 [expr {$col - 1}]
for {set row 0} {$row < $BM(height)} {incr row} {
if {[info exists BM(b,$row,$col2)]} {
set BM(b,$row,$col) $BM(b,$row,$col2)
} else {
set BM(b,$row,$col) 0
}
}
}
} elseif {$what == "sup"} { ;# Shift up
for {set row 0} {$row < $BM(height)} {incr row} {
set row2 [expr {$row + 1}]
for {set col 0} {$col < $BM(width)} {incr col} {
if {[info exists BM(b,$row2,$col)]} {
set BM(b,$row,$col) $BM(b,$row2,$col)
} else {
set BM(b,$row,$col) 0
}
}
}
} elseif {$what == "sdown"} { ;# Shift down
for {set row [expr {$BM(height) - 1}]} {$row >= 0} {incr row -1} {
set row2 [expr {$row - 1}]
for {set col 0} {$col < $BM(width)} {incr col} {
if {[info exists BM(b,$row2,$col)]} {
set BM(b,$row,$col) $BM(b,$row2,$col)
} else {
set BM(b,$row,$col) 0
}
}
}
}
set BM(raw) [UnparseBMP]
RedrawBits
::img::current config -data $BM(raw)
}
proc RedrawBits {} {
global BM
.c delete bit
for {set row 0} {$row < $BM(height)} {incr row} {
for {set col 0} {$col < $BM(width)} {incr col} {
if {$BM(b,$row,$col)} {ShowBitCell $row $col}
}
}
}
################################################################
################################################################
################################################################
DoDisplay
ParseBMP $bitmap
ShowBMP
标签：
tcltk
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