| 1 | # clrpick.tcl -- |
| 2 | # |
| 3 | # Color selection dialog for platforms that do not support a |
| 4 | # standard color selection dialog. |
| 5 | # |
| 6 | # RCS: @(#) $Id: clrpick.tcl,v 1.20 2003/02/21 14:40:26 dkf Exp $ |
| 7 | # |
| 8 | # Copyright (c) 1996 Sun Microsystems, Inc. |
| 9 | # |
| 10 | # See the file "license.terms" for information on usage and redistribution |
| 11 | # of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 12 | # |
| 13 | # ToDo: |
| 14 | # |
| 15 | # (1): Find out how many free colors are left in the colormap and |
| 16 | # don't allocate too many colors. |
| 17 | # (2): Implement HSV color selection. |
| 18 | # |
| 19 | |
| 20 | # Make sure namespaces exist |
| 21 | namespace eval ::tk {} |
| 22 | namespace eval ::tk::dialog {} |
| 23 | namespace eval ::tk::dialog::color { |
| 24 | namespace import ::tk::msgcat::* |
| 25 | } |
| 26 | |
| 27 | # ::tk::dialog::color:: -- |
| 28 | # |
| 29 | # Create a color dialog and let the user choose a color. This function |
| 30 | # should not be called directly. It is called by the tk_chooseColor |
| 31 | # function when a native color selector widget does not exist |
| 32 | # |
| 33 | proc ::tk::dialog::color:: {args} { |
| 34 | variable ::tk::Priv |
| 35 | set dataName __tk__color |
| 36 | upvar ::tk::dialog::color::$dataName data |
| 37 | set w .$dataName |
| 38 | |
| 39 | # The lines variables track the start and end indices of the line |
| 40 | # elements in the colorbar canvases. |
| 41 | set data(lines,red,start) 0 |
| 42 | set data(lines,red,last) -1 |
| 43 | set data(lines,green,start) 0 |
| 44 | set data(lines,green,last) -1 |
| 45 | set data(lines,blue,start) 0 |
| 46 | set data(lines,blue,last) -1 |
| 47 | |
| 48 | # This is the actual number of lines that are drawn in each color strip. |
| 49 | # Note that the bars may be of any width. |
| 50 | # However, NUM_COLORBARS must be a number that evenly divides 256. |
| 51 | # Such as 256, 128, 64, etc. |
| 52 | set data(NUM_COLORBARS) 16 |
| 53 | |
| 54 | # BARS_WIDTH is the number of pixels wide the color bar portion of the |
| 55 | # canvas is. This number must be a multiple of NUM_COLORBARS |
| 56 | set data(BARS_WIDTH) 160 |
| 57 | |
| 58 | # PLGN_WIDTH is the number of pixels wide of the triangular selection |
| 59 | # polygon. This also results in the definition of the padding on the |
| 60 | # left and right sides which is half of PLGN_WIDTH. Make this number even. |
| 61 | set data(PLGN_HEIGHT) 10 |
| 62 | |
| 63 | # PLGN_HEIGHT is the height of the selection polygon and the height of the |
| 64 | # selection rectangle at the bottom of the color bar. No restrictions. |
| 65 | set data(PLGN_WIDTH) 10 |
| 66 | |
| 67 | Config $dataName $args |
| 68 | InitValues $dataName |
| 69 | |
| 70 | set sc [winfo screen $data(-parent)] |
| 71 | set winExists [winfo exists $w] |
| 72 | if {!$winExists || [string compare $sc [winfo screen $w]]} { |
| 73 | if {$winExists} { |
| 74 | destroy $w |
| 75 | } |
| 76 | toplevel $w -class TkColorDialog -screen $sc |
| 77 | BuildDialog $w |
| 78 | } |
| 79 | |
| 80 | # Dialog boxes should be transient with respect to their parent, |
| 81 | # so that they will always stay on top of their parent window. However, |
| 82 | # some window managers will create the window as withdrawn if the parent |
| 83 | # window is withdrawn or iconified. Combined with the grab we put on the |
| 84 | # window, this can hang the entire application. Therefore we only make |
| 85 | # the dialog transient if the parent is viewable. |
| 86 | |
| 87 | if {[winfo viewable [winfo toplevel $data(-parent)]] } { |
| 88 | wm transient $w $data(-parent) |
| 89 | } |
| 90 | |
| 91 | # 5. Withdraw the window, then update all the geometry information |
| 92 | # so we know how big it wants to be, then center the window in the |
| 93 | # display and de-iconify it. |
| 94 | |
| 95 | ::tk::PlaceWindow $w widget $data(-parent) |
| 96 | wm title $w $data(-title) |
| 97 | |
| 98 | # 6. Set a grab and claim the focus too. |
| 99 | |
| 100 | ::tk::SetFocusGrab $w $data(okBtn) |
| 101 | |
| 102 | # 7. Wait for the user to respond, then restore the focus and |
| 103 | # return the index of the selected button. Restore the focus |
| 104 | # before deleting the window, since otherwise the window manager |
| 105 | # may take the focus away so we can't redirect it. Finally, |
| 106 | # restore any grab that was in effect. |
| 107 | |
| 108 | vwait ::tk::Priv(selectColor) |
| 109 | ::tk::RestoreFocusGrab $w $data(okBtn) |
| 110 | unset data |
| 111 | |
| 112 | return $Priv(selectColor) |
| 113 | } |
| 114 | |
| 115 | # ::tk::dialog::color::InitValues -- |
| 116 | # |
| 117 | # Get called during initialization or when user resets NUM_COLORBARS |
| 118 | # |
| 119 | proc ::tk::dialog::color::InitValues {dataName} { |
| 120 | upvar ::tk::dialog::color::$dataName data |
| 121 | |
| 122 | # IntensityIncr is the difference in color intensity between a colorbar |
| 123 | # and its neighbors. |
| 124 | set data(intensityIncr) [expr {256 / $data(NUM_COLORBARS)}] |
| 125 | |
| 126 | # ColorbarWidth is the width of each colorbar |
| 127 | set data(colorbarWidth) \ |
| 128 | [expr {$data(BARS_WIDTH) / $data(NUM_COLORBARS)}] |
| 129 | |
| 130 | # Indent is the width of the space at the left and right side of the |
| 131 | # colorbar. It is always half the selector polygon width, because the |
| 132 | # polygon extends into the space. |
| 133 | set data(indent) [expr {$data(PLGN_WIDTH) / 2}] |
| 134 | |
| 135 | set data(colorPad) 2 |
| 136 | set data(selPad) [expr {$data(PLGN_WIDTH) / 2}] |
| 137 | |
| 138 | # |
| 139 | # minX is the x coordinate of the first colorbar |
| 140 | # |
| 141 | set data(minX) $data(indent) |
| 142 | |
| 143 | # |
| 144 | # maxX is the x coordinate of the last colorbar |
| 145 | # |
| 146 | set data(maxX) [expr {$data(BARS_WIDTH) + $data(indent)-1}] |
| 147 | |
| 148 | # |
| 149 | # canvasWidth is the width of the entire canvas, including the indents |
| 150 | # |
| 151 | set data(canvasWidth) [expr {$data(BARS_WIDTH) + $data(PLGN_WIDTH)}] |
| 152 | |
| 153 | # Set the initial color, specified by -initialcolor, or the |
| 154 | # color chosen by the user the last time. |
| 155 | set data(selection) $data(-initialcolor) |
| 156 | set data(finalColor) $data(-initialcolor) |
| 157 | set rgb [winfo rgb . $data(selection)] |
| 158 | |
| 159 | set data(red,intensity) [expr {[lindex $rgb 0]/0x100}] |
| 160 | set data(green,intensity) [expr {[lindex $rgb 1]/0x100}] |
| 161 | set data(blue,intensity) [expr {[lindex $rgb 2]/0x100}] |
| 162 | } |
| 163 | |
| 164 | # ::tk::dialog::color::Config -- |
| 165 | # |
| 166 | # Parses the command line arguments to tk_chooseColor |
| 167 | # |
| 168 | proc ::tk::dialog::color::Config {dataName argList} { |
| 169 | variable ::tk::Priv |
| 170 | upvar ::tk::dialog::color::$dataName data |
| 171 | |
| 172 | # 1: the configuration specs |
| 173 | # |
| 174 | if {[info exists Priv(selectColor)] && \ |
| 175 | [string compare $Priv(selectColor) ""]} { |
| 176 | set defaultColor $Priv(selectColor) |
| 177 | } else { |
| 178 | set defaultColor [. cget -background] |
| 179 | } |
| 180 | |
| 181 | set specs [list \ |
| 182 | [list -initialcolor "" "" $defaultColor] \ |
| 183 | [list -parent "" "" "."] \ |
| 184 | [list -title "" "" [mc "Color"]] \ |
| 185 | ] |
| 186 | |
| 187 | # 2: parse the arguments |
| 188 | # |
| 189 | tclParseConfigSpec ::tk::dialog::color::$dataName $specs "" $argList |
| 190 | |
| 191 | if {[string equal $data(-title) ""]} { |
| 192 | set data(-title) " " |
| 193 | } |
| 194 | if {[catch {winfo rgb . $data(-initialcolor)} err]} { |
| 195 | error $err |
| 196 | } |
| 197 | |
| 198 | if {![winfo exists $data(-parent)]} { |
| 199 | error "bad window path name \"$data(-parent)\"" |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | # ::tk::dialog::color::BuildDialog -- |
| 204 | # |
| 205 | # Build the dialog. |
| 206 | # |
| 207 | proc ::tk::dialog::color::BuildDialog {w} { |
| 208 | upvar ::tk::dialog::color::[winfo name $w] data |
| 209 | |
| 210 | # TopFrame contains the color strips and the color selection |
| 211 | # |
| 212 | set topFrame [frame $w.top -relief raised -bd 1] |
| 213 | |
| 214 | # StripsFrame contains the colorstrips and the individual RGB entries |
| 215 | set stripsFrame [frame $topFrame.colorStrip] |
| 216 | |
| 217 | set maxWidth [::tk::mcmaxamp &Red &Green &Blue] |
| 218 | set maxWidth [expr {$maxWidth<6?6:$maxWidth}] |
| 219 | set colorList [list \ |
| 220 | red [mc "&Red"] \ |
| 221 | green [mc "&Green"] \ |
| 222 | blue [mc "&Blue"] \ |
| 223 | ] |
| 224 | foreach {color l} $colorList { |
| 225 | # each f frame contains an [R|G|B] entry and the equiv. color strip. |
| 226 | set f [frame $stripsFrame.$color] |
| 227 | |
| 228 | # The box frame contains the label and entry widget for an [R|G|B] |
| 229 | set box [frame $f.box] |
| 230 | |
| 231 | bind [::tk::AmpWidget label $box.label -text $l: -width $maxWidth \ |
| 232 | -anchor ne] <<AltUnderlined>> [list focus $box.entry] |
| 233 | |
| 234 | entry $box.entry -textvariable \ |
| 235 | ::tk::dialog::color::[winfo name $w]($color,intensity) \ |
| 236 | -width 4 |
| 237 | pack $box.label -side left -fill y -padx 2 -pady 3 |
| 238 | pack $box.entry -side left -anchor n -pady 0 |
| 239 | pack $box -side left -fill both |
| 240 | |
| 241 | set height [expr \ |
| 242 | {[winfo reqheight $box.entry] - \ |
| 243 | 2*([$box.entry cget -highlightthickness] + [$box.entry cget -bd])}] |
| 244 | |
| 245 | canvas $f.color -height $height\ |
| 246 | -width $data(BARS_WIDTH) -relief sunken -bd 2 |
| 247 | canvas $f.sel -height $data(PLGN_HEIGHT) \ |
| 248 | -width $data(canvasWidth) -highlightthickness 0 |
| 249 | pack $f.color -expand yes -fill both |
| 250 | pack $f.sel -expand yes -fill both |
| 251 | |
| 252 | pack $f -side top -fill x -padx 0 -pady 2 |
| 253 | |
| 254 | set data($color,entry) $box.entry |
| 255 | set data($color,col) $f.color |
| 256 | set data($color,sel) $f.sel |
| 257 | |
| 258 | bind $data($color,col) <Configure> \ |
| 259 | [list tk::dialog::color::DrawColorScale $w $color 1] |
| 260 | bind $data($color,col) <Enter> \ |
| 261 | [list tk::dialog::color::EnterColorBar $w $color] |
| 262 | bind $data($color,col) <Leave> \ |
| 263 | [list tk::dialog::color::LeaveColorBar $w $color] |
| 264 | |
| 265 | bind $data($color,sel) <Enter> \ |
| 266 | [list tk::dialog::color::EnterColorBar $w $color] |
| 267 | bind $data($color,sel) <Leave> \ |
| 268 | [list tk::dialog::color::LeaveColorBar $w $color] |
| 269 | |
| 270 | bind $box.entry <Return> [list tk::dialog::color::HandleRGBEntry $w] |
| 271 | } |
| 272 | |
| 273 | pack $stripsFrame -side left -fill both -padx 4 -pady 10 |
| 274 | |
| 275 | # The selFrame contains a frame that demonstrates the currently |
| 276 | # selected color |
| 277 | # |
| 278 | set selFrame [frame $topFrame.sel] |
| 279 | set lab [::tk::AmpWidget label $selFrame.lab -text [mc "&Selection:"] \ |
| 280 | -anchor sw] |
| 281 | set ent [entry $selFrame.ent \ |
| 282 | -textvariable ::tk::dialog::color::[winfo name $w](selection) \ |
| 283 | -width 16] |
| 284 | set f1 [frame $selFrame.f1 -relief sunken -bd 2] |
| 285 | set data(finalCanvas) [frame $f1.demo -bd 0 -width 100 -height 70] |
| 286 | |
| 287 | pack $lab $ent -side top -fill x -padx 4 -pady 2 |
| 288 | pack $f1 -expand yes -anchor nw -fill both -padx 6 -pady 10 |
| 289 | pack $data(finalCanvas) -expand yes -fill both |
| 290 | |
| 291 | bind $ent <Return> [list tk::dialog::color::HandleSelEntry $w] |
| 292 | |
| 293 | pack $selFrame -side left -fill none -anchor nw |
| 294 | pack $topFrame -side top -expand yes -fill both -anchor nw |
| 295 | |
| 296 | # the botFrame frame contains the buttons |
| 297 | # |
| 298 | set botFrame [frame $w.bot -relief raised -bd 1] |
| 299 | |
| 300 | ::tk::AmpWidget button $botFrame.ok -text [mc "&OK"] \ |
| 301 | -command [list tk::dialog::color::OkCmd $w] |
| 302 | ::tk::AmpWidget button $botFrame.cancel -text [mc "&Cancel"] \ |
| 303 | -command [list tk::dialog::color::CancelCmd $w] |
| 304 | |
| 305 | set data(okBtn) $botFrame.ok |
| 306 | set data(cancelBtn) $botFrame.cancel |
| 307 | |
| 308 | grid x $botFrame.ok x $botFrame.cancel x -sticky ew |
| 309 | grid configure $botFrame.ok $botFrame.cancel -padx 10 -pady 10 |
| 310 | grid columnconfigure $botFrame {0 4} -weight 1 -uniform space |
| 311 | grid columnconfigure $botFrame {1 3} -weight 1 -uniform button |
| 312 | grid columnconfigure $botFrame 2 -weight 2 -uniform space |
| 313 | pack $botFrame -side bottom -fill x |
| 314 | |
| 315 | |
| 316 | # Accelerator bindings |
| 317 | bind $lab <<AltUnderlined>> [list focus $ent] |
| 318 | bind $w <KeyPress-Escape> [list tk::ButtonInvoke $data(cancelBtn)] |
| 319 | bind $w <Alt-Key> [list tk::AltKeyInDialog $w %A] |
| 320 | |
| 321 | wm protocol $w WM_DELETE_WINDOW [list tk::dialog::color::CancelCmd $w] |
| 322 | } |
| 323 | |
| 324 | # ::tk::dialog::color::SetRGBValue -- |
| 325 | # |
| 326 | # Sets the current selection of the dialog box |
| 327 | # |
| 328 | proc ::tk::dialog::color::SetRGBValue {w color} { |
| 329 | upvar ::tk::dialog::color::[winfo name $w] data |
| 330 | |
| 331 | set data(red,intensity) [lindex $color 0] |
| 332 | set data(green,intensity) [lindex $color 1] |
| 333 | set data(blue,intensity) [lindex $color 2] |
| 334 | |
| 335 | RedrawColorBars $w all |
| 336 | |
| 337 | # Now compute the new x value of each colorbars pointer polygon |
| 338 | foreach color [list red green blue ] { |
| 339 | set x [RgbToX $w $data($color,intensity)] |
| 340 | MoveSelector $w $data($color,sel) $color $x 0 |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | # ::tk::dialog::color::XToRgb -- |
| 345 | # |
| 346 | # Converts a screen coordinate to intensity |
| 347 | # |
| 348 | proc ::tk::dialog::color::XToRgb {w x} { |
| 349 | upvar ::tk::dialog::color::[winfo name $w] data |
| 350 | |
| 351 | set x [expr {($x * $data(intensityIncr))/ $data(colorbarWidth)}] |
| 352 | if {$x > 255} { set x 255 } |
| 353 | return $x |
| 354 | } |
| 355 | |
| 356 | # ::tk::dialog::color::RgbToX |
| 357 | # |
| 358 | # Converts an intensity to screen coordinate. |
| 359 | # |
| 360 | proc ::tk::dialog::color::RgbToX {w color} { |
| 361 | upvar ::tk::dialog::color::[winfo name $w] data |
| 362 | |
| 363 | return [expr {($color * $data(colorbarWidth)/ $data(intensityIncr))}] |
| 364 | } |
| 365 | |
| 366 | |
| 367 | # ::tk::dialog::color::DrawColorScale -- |
| 368 | # |
| 369 | # Draw color scale is called whenever the size of one of the color |
| 370 | # scale canvases is changed. |
| 371 | # |
| 372 | proc ::tk::dialog::color::DrawColorScale {w c {create 0}} { |
| 373 | upvar ::tk::dialog::color::[winfo name $w] data |
| 374 | |
| 375 | # col: color bar canvas |
| 376 | # sel: selector canvas |
| 377 | set col $data($c,col) |
| 378 | set sel $data($c,sel) |
| 379 | |
| 380 | # First handle the case that we are creating everything for the first time. |
| 381 | if {$create} { |
| 382 | # First remove all the lines that already exist. |
| 383 | if { $data(lines,$c,last) > $data(lines,$c,start)} { |
| 384 | for {set i $data(lines,$c,start)} \ |
| 385 | {$i <= $data(lines,$c,last)} { incr i} { |
| 386 | $sel delete $i |
| 387 | } |
| 388 | } |
| 389 | # Delete the selector if it exists |
| 390 | if {[info exists data($c,index)]} { |
| 391 | $sel delete $data($c,index) |
| 392 | } |
| 393 | |
| 394 | # Draw the selection polygons |
| 395 | CreateSelector $w $sel $c |
| 396 | $sel bind $data($c,index) <ButtonPress-1> \ |
| 397 | [list tk::dialog::color::StartMove $w $sel $c %x $data(selPad) 1] |
| 398 | $sel bind $data($c,index) <B1-Motion> \ |
| 399 | [list tk::dialog::color::MoveSelector $w $sel $c %x $data(selPad)] |
| 400 | $sel bind $data($c,index) <ButtonRelease-1> \ |
| 401 | [list tk::dialog::color::ReleaseMouse $w $sel $c %x $data(selPad)] |
| 402 | |
| 403 | set height [winfo height $col] |
| 404 | # Create an invisible region under the colorstrip to catch mouse clicks |
| 405 | # that aren't on the selector. |
| 406 | set data($c,clickRegion) [$sel create rectangle 0 0 \ |
| 407 | $data(canvasWidth) $height -fill {} -outline {}] |
| 408 | |
| 409 | bind $col <ButtonPress-1> \ |
| 410 | [list tk::dialog::color::StartMove $w $sel $c %x $data(colorPad)] |
| 411 | bind $col <B1-Motion> \ |
| 412 | [list tk::dialog::color::MoveSelector $w $sel $c %x $data(colorPad)] |
| 413 | bind $col <ButtonRelease-1> \ |
| 414 | [list tk::dialog::color::ReleaseMouse $w $sel $c %x $data(colorPad)] |
| 415 | |
| 416 | $sel bind $data($c,clickRegion) <ButtonPress-1> \ |
| 417 | [list tk::dialog::color::StartMove $w $sel $c %x $data(selPad)] |
| 418 | $sel bind $data($c,clickRegion) <B1-Motion> \ |
| 419 | [list tk::dialog::color::MoveSelector $w $sel $c %x $data(selPad)] |
| 420 | $sel bind $data($c,clickRegion) <ButtonRelease-1> \ |
| 421 | [list tk::dialog::color::ReleaseMouse $w $sel $c %x $data(selPad)] |
| 422 | } else { |
| 423 | # l is the canvas index of the first colorbar. |
| 424 | set l $data(lines,$c,start) |
| 425 | } |
| 426 | |
| 427 | # Draw the color bars. |
| 428 | set highlightW [expr {[$col cget -highlightthickness] + [$col cget -bd]}] |
| 429 | for {set i 0} { $i < $data(NUM_COLORBARS)} { incr i} { |
| 430 | set intensity [expr {$i * $data(intensityIncr)}] |
| 431 | set startx [expr {$i * $data(colorbarWidth) + $highlightW}] |
| 432 | if {[string equal $c "red"]} { |
| 433 | set color [format "#%02x%02x%02x" \ |
| 434 | $intensity \ |
| 435 | $data(green,intensity) \ |
| 436 | $data(blue,intensity)] |
| 437 | } elseif {[string equal $c "green"]} { |
| 438 | set color [format "#%02x%02x%02x" \ |
| 439 | $data(red,intensity) \ |
| 440 | $intensity \ |
| 441 | $data(blue,intensity)] |
| 442 | } else { |
| 443 | set color [format "#%02x%02x%02x" \ |
| 444 | $data(red,intensity) \ |
| 445 | $data(green,intensity) \ |
| 446 | $intensity] |
| 447 | } |
| 448 | |
| 449 | if {$create} { |
| 450 | set index [$col create rect $startx $highlightW \ |
| 451 | [expr {$startx +$data(colorbarWidth)}] \ |
| 452 | [expr {[winfo height $col] + $highlightW}]\ |
| 453 | -fill $color -outline $color] |
| 454 | } else { |
| 455 | $col itemconfigure $l -fill $color -outline $color |
| 456 | incr l |
| 457 | } |
| 458 | } |
| 459 | $sel raise $data($c,index) |
| 460 | |
| 461 | if {$create} { |
| 462 | set data(lines,$c,last) $index |
| 463 | set data(lines,$c,start) [expr {$index - $data(NUM_COLORBARS) + 1}] |
| 464 | } |
| 465 | |
| 466 | RedrawFinalColor $w |
| 467 | } |
| 468 | |
| 469 | # ::tk::dialog::color::CreateSelector -- |
| 470 | # |
| 471 | # Creates and draws the selector polygon at the position |
| 472 | # $data($c,intensity). |
| 473 | # |
| 474 | proc ::tk::dialog::color::CreateSelector {w sel c } { |
| 475 | upvar ::tk::dialog::color::[winfo name $w] data |
| 476 | set data($c,index) [$sel create polygon \ |
| 477 | 0 $data(PLGN_HEIGHT) \ |
| 478 | $data(PLGN_WIDTH) $data(PLGN_HEIGHT) \ |
| 479 | $data(indent) 0] |
| 480 | set data($c,x) [RgbToX $w $data($c,intensity)] |
| 481 | $sel move $data($c,index) $data($c,x) 0 |
| 482 | } |
| 483 | |
| 484 | # ::tk::dialog::color::RedrawFinalColor |
| 485 | # |
| 486 | # Combines the intensities of the three colors into the final color |
| 487 | # |
| 488 | proc ::tk::dialog::color::RedrawFinalColor {w} { |
| 489 | upvar ::tk::dialog::color::[winfo name $w] data |
| 490 | |
| 491 | set color [format "#%02x%02x%02x" $data(red,intensity) \ |
| 492 | $data(green,intensity) $data(blue,intensity)] |
| 493 | |
| 494 | $data(finalCanvas) configure -bg $color |
| 495 | set data(finalColor) $color |
| 496 | set data(selection) $color |
| 497 | set data(finalRGB) [list \ |
| 498 | $data(red,intensity) \ |
| 499 | $data(green,intensity) \ |
| 500 | $data(blue,intensity)] |
| 501 | } |
| 502 | |
| 503 | # ::tk::dialog::color::RedrawColorBars -- |
| 504 | # |
| 505 | # Only redraws the colors on the color strips that were not manipulated. |
| 506 | # Params: color of colorstrip that changed. If color is not [red|green|blue] |
| 507 | # Then all colorstrips will be updated |
| 508 | # |
| 509 | proc ::tk::dialog::color::RedrawColorBars {w colorChanged} { |
| 510 | upvar ::tk::dialog::color::[winfo name $w] data |
| 511 | |
| 512 | switch $colorChanged { |
| 513 | red { |
| 514 | DrawColorScale $w green |
| 515 | DrawColorScale $w blue |
| 516 | } |
| 517 | green { |
| 518 | DrawColorScale $w red |
| 519 | DrawColorScale $w blue |
| 520 | } |
| 521 | blue { |
| 522 | DrawColorScale $w red |
| 523 | DrawColorScale $w green |
| 524 | } |
| 525 | default { |
| 526 | DrawColorScale $w red |
| 527 | DrawColorScale $w green |
| 528 | DrawColorScale $w blue |
| 529 | } |
| 530 | } |
| 531 | RedrawFinalColor $w |
| 532 | } |
| 533 | |
| 534 | #---------------------------------------------------------------------- |
| 535 | # Event handlers |
| 536 | #---------------------------------------------------------------------- |
| 537 | |
| 538 | # ::tk::dialog::color::StartMove -- |
| 539 | # |
| 540 | # Handles a mousedown button event over the selector polygon. |
| 541 | # Adds the bindings for moving the mouse while the button is |
| 542 | # pressed. Sets the binding for the button-release event. |
| 543 | # |
| 544 | # Params: sel is the selector canvas window, color is the color of the strip. |
| 545 | # |
| 546 | proc ::tk::dialog::color::StartMove {w sel color x delta {dontMove 0}} { |
| 547 | upvar ::tk::dialog::color::[winfo name $w] data |
| 548 | |
| 549 | if {!$dontMove} { |
| 550 | MoveSelector $w $sel $color $x $delta |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | # ::tk::dialog::color::MoveSelector -- |
| 555 | # |
| 556 | # Moves the polygon selector so that its middle point has the same |
| 557 | # x value as the specified x. If x is outside the bounds [0,255], |
| 558 | # the selector is set to the closest endpoint. |
| 559 | # |
| 560 | # Params: sel is the selector canvas, c is [red|green|blue] |
| 561 | # x is a x-coordinate. |
| 562 | # |
| 563 | proc ::tk::dialog::color::MoveSelector {w sel color x delta} { |
| 564 | upvar ::tk::dialog::color::[winfo name $w] data |
| 565 | |
| 566 | incr x -$delta |
| 567 | |
| 568 | if { $x < 0 } { |
| 569 | set x 0 |
| 570 | } elseif { $x > $data(BARS_WIDTH)} { |
| 571 | set x $data(BARS_WIDTH) |
| 572 | } |
| 573 | set diff [expr {$x - $data($color,x)}] |
| 574 | $sel move $data($color,index) $diff 0 |
| 575 | set data($color,x) [expr {$data($color,x) + $diff}] |
| 576 | |
| 577 | # Return the x value that it was actually set at |
| 578 | return $x |
| 579 | } |
| 580 | |
| 581 | # ::tk::dialog::color::ReleaseMouse |
| 582 | # |
| 583 | # Removes mouse tracking bindings, updates the colorbars. |
| 584 | # |
| 585 | # Params: sel is the selector canvas, color is the color of the strip, |
| 586 | # x is the x-coord of the mouse. |
| 587 | # |
| 588 | proc ::tk::dialog::color::ReleaseMouse {w sel color x delta} { |
| 589 | upvar ::tk::dialog::color::[winfo name $w] data |
| 590 | |
| 591 | set x [MoveSelector $w $sel $color $x $delta] |
| 592 | |
| 593 | # Determine exactly what color we are looking at. |
| 594 | set data($color,intensity) [XToRgb $w $x] |
| 595 | |
| 596 | RedrawColorBars $w $color |
| 597 | } |
| 598 | |
| 599 | # ::tk::dialog::color::ResizeColorbars -- |
| 600 | # |
| 601 | # Completely redraws the colorbars, including resizing the |
| 602 | # colorstrips |
| 603 | # |
| 604 | proc ::tk::dialog::color::ResizeColorBars {w} { |
| 605 | upvar ::tk::dialog::color::[winfo name $w] data |
| 606 | |
| 607 | if { ($data(BARS_WIDTH) < $data(NUM_COLORBARS)) || |
| 608 | (($data(BARS_WIDTH) % $data(NUM_COLORBARS)) != 0)} { |
| 609 | set data(BARS_WIDTH) $data(NUM_COLORBARS) |
| 610 | } |
| 611 | InitValues [winfo name $w] |
| 612 | foreach color [list red green blue ] { |
| 613 | $data($color,col) configure -width $data(canvasWidth) |
| 614 | DrawColorScale $w $color 1 |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | # ::tk::dialog::color::HandleSelEntry -- |
| 619 | # |
| 620 | # Handles the return keypress event in the "Selection:" entry |
| 621 | # |
| 622 | proc ::tk::dialog::color::HandleSelEntry {w} { |
| 623 | upvar ::tk::dialog::color::[winfo name $w] data |
| 624 | |
| 625 | set text [string trim $data(selection)] |
| 626 | # Check to make sure that the color is valid |
| 627 | if {[catch {set color [winfo rgb . $text]} ]} { |
| 628 | set data(selection) $data(finalColor) |
| 629 | return |
| 630 | } |
| 631 | |
| 632 | set R [expr {[lindex $color 0]/0x100}] |
| 633 | set G [expr {[lindex $color 1]/0x100}] |
| 634 | set B [expr {[lindex $color 2]/0x100}] |
| 635 | |
| 636 | SetRGBValue $w "$R $G $B" |
| 637 | set data(selection) $text |
| 638 | } |
| 639 | |
| 640 | # ::tk::dialog::color::HandleRGBEntry -- |
| 641 | # |
| 642 | # Handles the return keypress event in the R, G or B entry |
| 643 | # |
| 644 | proc ::tk::dialog::color::HandleRGBEntry {w} { |
| 645 | upvar ::tk::dialog::color::[winfo name $w] data |
| 646 | |
| 647 | foreach c [list red green blue] { |
| 648 | if {[catch { |
| 649 | set data($c,intensity) [expr {int($data($c,intensity))}] |
| 650 | }]} { |
| 651 | set data($c,intensity) 0 |
| 652 | } |
| 653 | |
| 654 | if {$data($c,intensity) < 0} { |
| 655 | set data($c,intensity) 0 |
| 656 | } |
| 657 | if {$data($c,intensity) > 255} { |
| 658 | set data($c,intensity) 255 |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | SetRGBValue $w "$data(red,intensity) \ |
| 663 | $data(green,intensity) $data(blue,intensity)" |
| 664 | } |
| 665 | |
| 666 | # mouse cursor enters a color bar |
| 667 | # |
| 668 | proc ::tk::dialog::color::EnterColorBar {w color} { |
| 669 | upvar ::tk::dialog::color::[winfo name $w] data |
| 670 | |
| 671 | $data($color,sel) itemconfig $data($color,index) -fill red |
| 672 | } |
| 673 | |
| 674 | # mouse leaves enters a color bar |
| 675 | # |
| 676 | proc ::tk::dialog::color::LeaveColorBar {w color} { |
| 677 | upvar ::tk::dialog::color::[winfo name $w] data |
| 678 | |
| 679 | $data($color,sel) itemconfig $data($color,index) -fill black |
| 680 | } |
| 681 | |
| 682 | # user hits OK button |
| 683 | # |
| 684 | proc ::tk::dialog::color::OkCmd {w} { |
| 685 | variable ::tk::Priv |
| 686 | upvar ::tk::dialog::color::[winfo name $w] data |
| 687 | |
| 688 | set Priv(selectColor) $data(finalColor) |
| 689 | } |
| 690 | |
| 691 | # user hits Cancel button |
| 692 | # |
| 693 | proc ::tk::dialog::color::CancelCmd {w} { |
| 694 | variable ::tk::Priv |
| 695 | set Priv(selectColor) "" |
| 696 | } |
| 697 | |