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- # clrpick.tcl --
- #
- # Color selection dialog for platforms that do not support a
- # standard color selection dialog.
- #
- # RCS: @(#) $Id: clrpick.tcl,v 1.10 2000/04/04 08:09:24 hobbs Exp $
- #
- # Copyright (c) 1996 Sun Microsystems, Inc.
- #
- # See the file "license.terms" for information on usage and redistribution
- # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- #
- # ToDo:
- #
- # (1): Find out how many free colors are left in the colormap and
- # don't allocate too many colors.
- # (2): Implement HSV color selection.
- #
-
- # tkColorDialog --
- #
- # Create a color dialog and let the user choose a color. This function
- # should not be called directly. It is called by the tk_chooseColor
- # function when a native color selector widget does not exist
- #
- proc tkColorDialog {args} {
- global tkPriv
- set w .__tk__color
- upvar #0 $w data
-
- # The lines variables track the start and end indices of the line
- # elements in the colorbar canvases.
- set data(lines,red,start) 0
- set data(lines,red,last) -1
- set data(lines,green,start) 0
- set data(lines,green,last) -1
- set data(lines,blue,start) 0
- set data(lines,blue,last) -1
-
- # This is the actual number of lines that are drawn in each color strip.
- # Note that the bars may be of any width.
- # However, NUM_COLORBARS must be a number that evenly divides 256.
- # Such as 256, 128, 64, etc.
- set data(NUM_COLORBARS) 8
-
- # BARS_WIDTH is the number of pixels wide the color bar portion of the
- # canvas is. This number must be a multiple of NUM_COLORBARS
- set data(BARS_WIDTH) 128
-
- # PLGN_WIDTH is the number of pixels wide of the triangular selection
- # polygon. This also results in the definition of the padding on the
- # left and right sides which is half of PLGN_WIDTH. Make this number even.
- set data(PLGN_HEIGHT) 10
-
- # PLGN_HEIGHT is the height of the selection polygon and the height of the
- # selection rectangle at the bottom of the color bar. No restrictions.
- set data(PLGN_WIDTH) 10
-
- tkColorDialog_Config $w $args
- tkColorDialog_InitValues $w
-
- set sc [winfo screen $data(-parent)]
- set winExists [winfo exists $w]
- if {!$winExists || [string compare $sc [winfo screen $w]]} {
- if {$winExists} {
- destroy $w
- }
- toplevel $w -class tkColorDialog -screen $sc
- tkColorDialog_BuildDialog $w
- }
-
- wm transient $w $data(-parent)
-
- # 5. Withdraw the window, then update all the geometry information
- # so we know how big it wants to be, then center the window in the
- # display and de-iconify it.
-
- ::tk::PlaceWindow $w widget $data(-parent)
- wm title $w $data(-title)
-
- # 6. Set a grab and claim the focus too.
-
- ::tk::SetFocusGrab $w $data(okBtn)
-
- # 7. Wait for the user to respond, then restore the focus and
- # return the index of the selected button. Restore the focus
- # before deleting the window, since otherwise the window manager
- # may take the focus away so we can't redirect it. Finally,
- # restore any grab that was in effect.
-
- vwait tkPriv(selectColor)
- ::tk::RestoreFocusGrab $w $data(okBtn)
- unset data
-
- return $tkPriv(selectColor)
- }
-
- # tkColorDialog_InitValues --
- #
- # Get called during initialization or when user resets NUM_COLORBARS
- #
- proc tkColorDialog_InitValues {w} {
- upvar #0 $w data
-
- # IntensityIncr is the difference in color intensity between a colorbar
- # and its neighbors.
- set data(intensityIncr) [expr {256 / $data(NUM_COLORBARS)}]
-
- # ColorbarWidth is the width of each colorbar
- set data(colorbarWidth) \
- [expr {$data(BARS_WIDTH) / $data(NUM_COLORBARS)}]
-
- # Indent is the width of the space at the left and right side of the
- # colorbar. It is always half the selector polygon width, because the
- # polygon extends into the space.
- set data(indent) [expr {$data(PLGN_WIDTH) / 2}]
-
- set data(colorPad) 2
- set data(selPad) [expr {$data(PLGN_WIDTH) / 2}]
-
- #
- # minX is the x coordinate of the first colorbar
- #
- set data(minX) $data(indent)
-
- #
- # maxX is the x coordinate of the last colorbar
- #
- set data(maxX) [expr {$data(BARS_WIDTH) + $data(indent)-1}]
-
- #
- # canvasWidth is the width of the entire canvas, including the indents
- #
- set data(canvasWidth) [expr {$data(BARS_WIDTH) + $data(PLGN_WIDTH)}]
-
- # Set the initial color, specified by -initialcolor, or the
- # color chosen by the user the last time.
- set data(selection) $data(-initialcolor)
- set data(finalColor) $data(-initialcolor)
- set rgb [winfo rgb . $data(selection)]
-
- set data(red,intensity) [expr {[lindex $rgb 0]/0x100}]
- set data(green,intensity) [expr {[lindex $rgb 1]/0x100}]
- set data(blue,intensity) [expr {[lindex $rgb 2]/0x100}]
- }
-
- # tkColorDialog_Config --
- #
- # Parses the command line arguments to tk_chooseColor
- #
- proc tkColorDialog_Config {w argList} {
- global tkPriv
- upvar #0 $w data
-
- # 1: the configuration specs
- #
- if {[info exists tkPriv(selectColor)] && \
- [string compare $tkPriv(selectColor) ""]} {
- set defaultColor $tkPriv(selectColor)
- } else {
- set defaultColor [. cget -background]
- }
-
- set specs [list \
- [list -initialcolor "" "" $defaultColor] \
- [list -parent "" "" "."] \
- [list -title "" "" "Color"] \
- ]
-
- # 2: parse the arguments
- #
- tclParseConfigSpec $w $specs "" $argList
-
- if {[string equal $data(-title) ""]} {
- set data(-title) " "
- }
- if {[catch {winfo rgb . $data(-initialcolor)} err]} {
- error $err
- }
-
- if {![winfo exists $data(-parent)]} {
- error "bad window path name \"$data(-parent)\""
- }
- }
-
- # tkColorDialog_BuildDialog --
- #
- # Build the dialog.
- #
- proc tkColorDialog_BuildDialog {w} {
- upvar #0 $w data
-
- # TopFrame contains the color strips and the color selection
- #
- set topFrame [frame $w.top -relief raised -bd 1]
-
- # StripsFrame contains the colorstrips and the individual RGB entries
- set stripsFrame [frame $topFrame.colorStrip]
-
- foreach c { Red Green Blue } {
- set color [string tolower $c]
-
- # each f frame contains an [R|G|B] entry and the equiv. color strip.
- set f [frame $stripsFrame.$color]
-
- # The box frame contains the label and entry widget for an [R|G|B]
- set box [frame $f.box]
-
- label $box.label -text $c: -width 6 -under 0 -anchor ne
- entry $box.entry -textvariable [format %s $w]($color,intensity) \
- -width 4
- pack $box.label -side left -fill y -padx 2 -pady 3
- pack $box.entry -side left -anchor n -pady 0
- pack $box -side left -fill both
-
- set height [expr \
- {[winfo reqheight $box.entry] - \
- 2*([$box.entry cget -highlightthickness] + [$box.entry cget -bd])}]
-
- canvas $f.color -height $height\
- -width $data(BARS_WIDTH) -relief sunken -bd 2
- canvas $f.sel -height $data(PLGN_HEIGHT) \
- -width $data(canvasWidth) -highlightthickness 0
- pack $f.color -expand yes -fill both
- pack $f.sel -expand yes -fill both
-
- pack $f -side top -fill x -padx 0 -pady 2
-
- set data($color,entry) $box.entry
- set data($color,col) $f.color
- set data($color,sel) $f.sel
-
- bind $data($color,col) <Configure> \
- [list tkColorDialog_DrawColorScale $w $color 1]
- bind $data($color,col) <Enter> \
- [list tkColorDialog_EnterColorBar $w $color]
- bind $data($color,col) <Leave> \
- [list tkColorDialog_LeaveColorBar $w $color]
-
- bind $data($color,sel) <Enter> \
- [list tkColorDialog_EnterColorBar $w $color]
- bind $data($color,sel) <Leave> \
- [list tkColorDialog_LeaveColorBar $w $color]
-
- bind $box.entry <Return> [list tkColorDialog_HandleRGBEntry $w]
- }
-
- pack $stripsFrame -side left -fill both -padx 4 -pady 10
-
- # The selFrame contains a frame that demonstrates the currently
- # selected color
- #
- set selFrame [frame $topFrame.sel]
- set lab [label $selFrame.lab -text "Selection:" -under 0 -anchor sw]
- set ent [entry $selFrame.ent -textvariable [format %s $w](selection) \
- -width 16]
- set f1 [frame $selFrame.f1 -relief sunken -bd 2]
- set data(finalCanvas) [frame $f1.demo -bd 0 -width 100 -height 70]
-
- pack $lab $ent -side top -fill x -padx 4 -pady 2
- pack $f1 -expand yes -anchor nw -fill both -padx 6 -pady 10
- pack $data(finalCanvas) -expand yes -fill both
-
- bind $ent <Return> [list tkColorDialog_HandleSelEntry $w]
-
- pack $selFrame -side left -fill none -anchor nw
- pack $topFrame -side top -expand yes -fill both -anchor nw
-
- # the botFrame frame contains the buttons
- #
- set botFrame [frame $w.bot -relief raised -bd 1]
- button $botFrame.ok -text OK -width 8 -under 0 \
- -command [list tkColorDialog_OkCmd $w]
- button $botFrame.cancel -text Cancel -width 8 -under 0 \
- -command [list tkColorDialog_CancelCmd $w]
-
- set data(okBtn) $botFrame.ok
- set data(cancelBtn) $botFrame.cancel
-
- pack $botFrame.ok $botFrame.cancel \
- -padx 10 -pady 10 -expand yes -side left
- pack $botFrame -side bottom -fill x
-
-
- # Accelerator bindings
-
- bind $w <Alt-r> [list focus $data(red,entry)]
- bind $w <Alt-g> [list focus $data(green,entry)]
- bind $w <Alt-b> [list focus $data(blue,entry)]
- bind $w <Alt-s> [list focus $ent]
- bind $w <KeyPress-Escape> [list tkButtonInvoke $data(cancelBtn)]
- bind $w <Alt-c> [list tkButtonInvoke $data(cancelBtn)]
- bind $w <Alt-o> [list tkButtonInvoke $data(okBtn)]
-
- wm protocol $w WM_DELETE_WINDOW [list tkColorDialog_CancelCmd $w]
- }
-
- # tkColorDialog_SetRGBValue --
- #
- # Sets the current selection of the dialog box
- #
- proc tkColorDialog_SetRGBValue {w color} {
- upvar #0 $w data
-
- set data(red,intensity) [lindex $color 0]
- set data(green,intensity) [lindex $color 1]
- set data(blue,intensity) [lindex $color 2]
-
- tkColorDialog_RedrawColorBars $w all
-
- # Now compute the new x value of each colorbars pointer polygon
- foreach color { red green blue } {
- set x [tkColorDialog_RgbToX $w $data($color,intensity)]
- tkColorDialog_MoveSelector $w $data($color,sel) $color $x 0
- }
- }
-
- # tkColorDialog_XToRgb --
- #
- # Converts a screen coordinate to intensity
- #
- proc tkColorDialog_XToRgb {w x} {
- upvar #0 $w data
-
- return [expr {($x * $data(intensityIncr))/ $data(colorbarWidth)}]
- }
-
- # tkColorDialog_RgbToX
- #
- # Converts an intensity to screen coordinate.
- #
- proc tkColorDialog_RgbToX {w color} {
- upvar #0 $w data
-
- return [expr {($color * $data(colorbarWidth)/ $data(intensityIncr))}]
- }
-
-
- # tkColorDialog_DrawColorScale --
- #
- # Draw color scale is called whenever the size of one of the color
- # scale canvases is changed.
- #
- proc tkColorDialog_DrawColorScale {w c {create 0}} {
- global lines
- upvar #0 $w data
-
- # col: color bar canvas
- # sel: selector canvas
- set col $data($c,col)
- set sel $data($c,sel)
-
- # First handle the case that we are creating everything for the first time.
- if {$create} {
- # First remove all the lines that already exist.
- if { $data(lines,$c,last) > $data(lines,$c,start)} {
- for {set i $data(lines,$c,start)} \
- {$i <= $data(lines,$c,last)} { incr i} {
- $sel delete $i
- }
- }
- # Delete the selector if it exists
- if {[info exists data($c,index)]} {
- $sel delete $data($c,index)
- }
-
- # Draw the selection polygons
- tkColorDialog_CreateSelector $w $sel $c
- $sel bind $data($c,index) <ButtonPress-1> \
- [list tkColorDialog_StartMove $w $sel $c %x $data(selPad) 1]
- $sel bind $data($c,index) <B1-Motion> \
- [list tkColorDialog_MoveSelector $w $sel $c %x $data(selPad)]
- $sel bind $data($c,index) <ButtonRelease-1> \
- [list tkColorDialog_ReleaseMouse $w $sel $c %x $data(selPad)]
-
- set height [winfo height $col]
- # Create an invisible region under the colorstrip to catch mouse clicks
- # that aren't on the selector.
- set data($c,clickRegion) [$sel create rectangle 0 0 \
- $data(canvasWidth) $height -fill {} -outline {}]
-
- bind $col <ButtonPress-1> \
- [list tkColorDialog_StartMove $w $sel $c %x $data(colorPad)]
- bind $col <B1-Motion> \
- [list tkColorDialog_MoveSelector $w $sel $c %x $data(colorPad)]
- bind $col <ButtonRelease-1> \
- [list tkColorDialog_ReleaseMouse $w $sel $c %x $data(colorPad)]
-
- $sel bind $data($c,clickRegion) <ButtonPress-1> \
- [list tkColorDialog_StartMove $w $sel $c %x $data(selPad)]
- $sel bind $data($c,clickRegion) <B1-Motion> \
- [list tkColorDialog_MoveSelector $w $sel $c %x $data(selPad)]
- $sel bind $data($c,clickRegion) <ButtonRelease-1> \
- [list tkColorDialog_ReleaseMouse $w $sel $c %x $data(selPad)]
- } else {
- # l is the canvas index of the first colorbar.
- set l $data(lines,$c,start)
- }
-
- # Draw the color bars.
- set highlightW [expr {[$col cget -highlightthickness] + [$col cget -bd]}]
- for {set i 0} { $i < $data(NUM_COLORBARS)} { incr i} {
- set intensity [expr {$i * $data(intensityIncr)}]
- set startx [expr {$i * $data(colorbarWidth) + $highlightW}]
- if {[string equal $c "red"]} {
- set color [format "#%02x%02x%02x" \
- $intensity \
- $data(green,intensity) \
- $data(blue,intensity)]
- } elseif {[string equal $c "green"]} {
- set color [format "#%02x%02x%02x" \
- $data(red,intensity) \
- $intensity \
- $data(blue,intensity)]
- } else {
- set color [format "#%02x%02x%02x" \
- $data(red,intensity) \
- $data(green,intensity) \
- $intensity]
- }
-
- if {$create} {
- set index [$col create rect $startx $highlightW \
- [expr {$startx +$data(colorbarWidth)}] \
- [expr {[winfo height $col] + $highlightW}]\
- -fill $color -outline $color]
- } else {
- $col itemconfigure $l -fill $color -outline $color
- incr l
- }
- }
- $sel raise $data($c,index)
-
- if {$create} {
- set data(lines,$c,last) $index
- set data(lines,$c,start) [expr {$index - $data(NUM_COLORBARS) + 1}]
- }
-
- tkColorDialog_RedrawFinalColor $w
- }
-
- # tkColorDialog_CreateSelector --
- #
- # Creates and draws the selector polygon at the position
- # $data($c,intensity).
- #
- proc tkColorDialog_CreateSelector {w sel c } {
- upvar #0 $w data
- set data($c,index) [$sel create polygon \
- 0 $data(PLGN_HEIGHT) \
- $data(PLGN_WIDTH) $data(PLGN_HEIGHT) \
- $data(indent) 0]
- set data($c,x) [tkColorDialog_RgbToX $w $data($c,intensity)]
- $sel move $data($c,index) $data($c,x) 0
- }
-
- # tkColorDialog_RedrawFinalColor
- #
- # Combines the intensities of the three colors into the final color
- #
- proc tkColorDialog_RedrawFinalColor {w} {
- upvar #0 $w data
-
- set color [format "#%02x%02x%02x" $data(red,intensity) \
- $data(green,intensity) $data(blue,intensity)]
-
- $data(finalCanvas) configure -bg $color
- set data(finalColor) $color
- set data(selection) $color
- set data(finalRGB) [list \
- $data(red,intensity) \
- $data(green,intensity) \
- $data(blue,intensity)]
- }
-
- # tkColorDialog_RedrawColorBars --
- #
- # Only redraws the colors on the color strips that were not manipulated.
- # Params: color of colorstrip that changed. If color is not [red|green|blue]
- # Then all colorstrips will be updated
- #
- proc tkColorDialog_RedrawColorBars {w colorChanged} {
- upvar #0 $w data
-
- switch $colorChanged {
- red {
- tkColorDialog_DrawColorScale $w green
- tkColorDialog_DrawColorScale $w blue
- }
- green {
- tkColorDialog_DrawColorScale $w red
- tkColorDialog_DrawColorScale $w blue
- }
- blue {
- tkColorDialog_DrawColorScale $w red
- tkColorDialog_DrawColorScale $w green
- }
- default {
- tkColorDialog_DrawColorScale $w red
- tkColorDialog_DrawColorScale $w green
- tkColorDialog_DrawColorScale $w blue
- }
- }
- tkColorDialog_RedrawFinalColor $w
- }
-
- #----------------------------------------------------------------------
- # Event handlers
- #----------------------------------------------------------------------
-
- # tkColorDialog_StartMove --
- #
- # Handles a mousedown button event over the selector polygon.
- # Adds the bindings for moving the mouse while the button is
- # pressed. Sets the binding for the button-release event.
- #
- # Params: sel is the selector canvas window, color is the color of the strip.
- #
- proc tkColorDialog_StartMove {w sel color x delta {dontMove 0}} {
- upvar #0 $w data
-
- if {!$dontMove} {
- tkColorDialog_MoveSelector $w $sel $color $x $delta
- }
- }
-
- # tkColorDialog_MoveSelector --
- #
- # Moves the polygon selector so that its middle point has the same
- # x value as the specified x. If x is outside the bounds [0,255],
- # the selector is set to the closest endpoint.
- #
- # Params: sel is the selector canvas, c is [red|green|blue]
- # x is a x-coordinate.
- #
- proc tkColorDialog_MoveSelector {w sel color x delta} {
- upvar #0 $w data
-
- incr x -$delta
-
- if { $x < 0 } {
- set x 0
- } elseif { $x >= $data(BARS_WIDTH)} {
- set x [expr {$data(BARS_WIDTH) - 1}]
- }
- set diff [expr {$x - $data($color,x)}]
- $sel move $data($color,index) $diff 0
- set data($color,x) [expr {$data($color,x) + $diff}]
-
- # Return the x value that it was actually set at
- return $x
- }
-
- # tkColorDialog_ReleaseMouse
- #
- # Removes mouse tracking bindings, updates the colorbars.
- #
- # Params: sel is the selector canvas, color is the color of the strip,
- # x is the x-coord of the mouse.
- #
- proc tkColorDialog_ReleaseMouse {w sel color x delta} {
- upvar #0 $w data
-
- set x [tkColorDialog_MoveSelector $w $sel $color $x $delta]
-
- # Determine exactly what color we are looking at.
- set data($color,intensity) [tkColorDialog_XToRgb $w $x]
-
- tkColorDialog_RedrawColorBars $w $color
- }
-
- # tkColorDialog_ResizeColorbars --
- #
- # Completely redraws the colorbars, including resizing the
- # colorstrips
- #
- proc tkColorDialog_ResizeColorBars {w} {
- upvar #0 $w data
-
- if { ($data(BARS_WIDTH) < $data(NUM_COLORBARS)) ||
- (($data(BARS_WIDTH) % $data(NUM_COLORBARS)) != 0)} {
- set data(BARS_WIDTH) $data(NUM_COLORBARS)
- }
- tkColorDialog_InitValues $w
- foreach color { red green blue } {
- $data($color,col) configure -width $data(canvasWidth)
- tkColorDialog_DrawColorScale $w $color 1
- }
- }
-
- # tkColorDialog_HandleSelEntry --
- #
- # Handles the return keypress event in the "Selection:" entry
- #
- proc tkColorDialog_HandleSelEntry {w} {
- upvar #0 $w data
-
- set text [string trim $data(selection)]
- # Check to make sure that the color is valid
- if {[catch {set color [winfo rgb . $text]} ]} {
- set data(selection) $data(finalColor)
- return
- }
-
- set R [expr {[lindex $color 0]/0x100}]
- set G [expr {[lindex $color 1]/0x100}]
- set B [expr {[lindex $color 2]/0x100}]
-
- tkColorDialog_SetRGBValue $w "$R $G $B"
- set data(selection) $text
- }
-
- # tkColorDialog_HandleRGBEntry --
- #
- # Handles the return keypress event in the R, G or B entry
- #
- proc tkColorDialog_HandleRGBEntry {w} {
- upvar #0 $w data
-
- foreach c {red green blue} {
- if {[catch {
- set data($c,intensity) [expr {int($data($c,intensity))}]
- }]} {
- set data($c,intensity) 0
- }
-
- if {$data($c,intensity) < 0} {
- set data($c,intensity) 0
- }
- if {$data($c,intensity) > 255} {
- set data($c,intensity) 255
- }
- }
-
- tkColorDialog_SetRGBValue $w "$data(red,intensity) $data(green,intensity) \
- $data(blue,intensity)"
- }
-
- # mouse cursor enters a color bar
- #
- proc tkColorDialog_EnterColorBar {w color} {
- upvar #0 $w data
-
- $data($color,sel) itemconfig $data($color,index) -fill red
- }
-
- # mouse leaves enters a color bar
- #
- proc tkColorDialog_LeaveColorBar {w color} {
- upvar #0 $w data
-
- $data($color,sel) itemconfig $data($color,index) -fill black
- }
-
- # user hits OK button
- #
- proc tkColorDialog_OkCmd {w} {
- global tkPriv
- upvar #0 $w data
-
- set tkPriv(selectColor) $data(finalColor)
- }
-
- # user hits Cancel button
- #
- proc tkColorDialog_CancelCmd {w} {
- global tkPriv
-
- set tkPriv(selectColor) ""
- }
-
-