694 lines
21 KiB
Tcl
694 lines
21 KiB
Tcl
# clrpick.tcl --
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#
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# Color selection dialog for platforms that do not support a
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# standard color selection dialog.
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#
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# Copyright (c) 1996 Sun Microsystems, Inc.
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#
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# See the file "license.terms" for information on usage and redistribution
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# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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# ToDo:
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#
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# (1): Find out how many free colors are left in the colormap and
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# don't allocate too many colors.
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# (2): Implement HSV color selection.
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#
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# Make sure namespaces exist
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namespace eval ::tk {}
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namespace eval ::tk::dialog {}
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namespace eval ::tk::dialog::color {
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namespace import ::tk::msgcat::*
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}
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# ::tk::dialog::color:: --
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#
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# Create a color dialog and let the user choose a color. This function
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# should not be called directly. It is called by the tk_chooseColor
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# function when a native color selector widget does not exist
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#
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proc ::tk::dialog::color:: {args} {
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variable ::tk::Priv
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set dataName __tk__color
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upvar ::tk::dialog::color::$dataName data
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set w .$dataName
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# The lines variables track the start and end indices of the line
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# elements in the colorbar canvases.
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set data(lines,red,start) 0
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set data(lines,red,last) -1
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set data(lines,green,start) 0
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set data(lines,green,last) -1
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set data(lines,blue,start) 0
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set data(lines,blue,last) -1
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# This is the actual number of lines that are drawn in each color strip.
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# Note that the bars may be of any width.
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# However, NUM_COLORBARS must be a number that evenly divides 256.
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# Such as 256, 128, 64, etc.
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set data(NUM_COLORBARS) 16
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# BARS_WIDTH is the number of pixels wide the color bar portion of the
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# canvas is. This number must be a multiple of NUM_COLORBARS
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set data(BARS_WIDTH) 160
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# PLGN_WIDTH is the number of pixels wide of the triangular selection
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# polygon. This also results in the definition of the padding on the
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# left and right sides which is half of PLGN_WIDTH. Make this number even.
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set data(PLGN_HEIGHT) 10
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# PLGN_HEIGHT is the height of the selection polygon and the height of the
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# selection rectangle at the bottom of the color bar. No restrictions.
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set data(PLGN_WIDTH) 10
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Config $dataName $args
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InitValues $dataName
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set sc [winfo screen $data(-parent)]
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set winExists [winfo exists $w]
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if {!$winExists || $sc ne [winfo screen $w]} {
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if {$winExists} {
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destroy $w
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}
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toplevel $w -class TkColorDialog -screen $sc
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if {[tk windowingsystem] eq "x11"} {wm attributes $w -type dialog}
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BuildDialog $w
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}
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# Dialog boxes should be transient with respect to their parent,
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# so that they will always stay on top of their parent window. However,
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# some window managers will create the window as withdrawn if the parent
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# window is withdrawn or iconified. Combined with the grab we put on the
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# window, this can hang the entire application. Therefore we only make
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# the dialog transient if the parent is viewable.
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if {[winfo viewable [winfo toplevel $data(-parent)]] } {
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wm transient $w $data(-parent)
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}
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# 5. Withdraw the window, then update all the geometry information
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# so we know how big it wants to be, then center the window in the
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# display (Motif style) and de-iconify it.
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::tk::PlaceWindow $w widget $data(-parent)
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wm title $w $data(-title)
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# 6. Set a grab and claim the focus too.
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::tk::SetFocusGrab $w $data(okBtn)
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# 7. Wait for the user to respond, then restore the focus and
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# return the index of the selected button. Restore the focus
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# before deleting the window, since otherwise the window manager
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# may take the focus away so we can't redirect it. Finally,
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# restore any grab that was in effect.
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vwait ::tk::Priv(selectColor)
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set result $Priv(selectColor)
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::tk::RestoreFocusGrab $w $data(okBtn)
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unset data
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return $result
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}
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# ::tk::dialog::color::InitValues --
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#
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# Get called during initialization or when user resets NUM_COLORBARS
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#
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proc ::tk::dialog::color::InitValues {dataName} {
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upvar ::tk::dialog::color::$dataName data
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# IntensityIncr is the difference in color intensity between a colorbar
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# and its neighbors.
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set data(intensityIncr) [expr {256 / $data(NUM_COLORBARS)}]
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# ColorbarWidth is the width of each colorbar
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set data(colorbarWidth) [expr {$data(BARS_WIDTH) / $data(NUM_COLORBARS)}]
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# Indent is the width of the space at the left and right side of the
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# colorbar. It is always half the selector polygon width, because the
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# polygon extends into the space.
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set data(indent) [expr {$data(PLGN_WIDTH) / 2}]
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set data(colorPad) 2
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set data(selPad) [expr {$data(PLGN_WIDTH) / 2}]
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#
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# minX is the x coordinate of the first colorbar
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#
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set data(minX) $data(indent)
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#
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# maxX is the x coordinate of the last colorbar
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#
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set data(maxX) [expr {$data(BARS_WIDTH) + $data(indent)-1}]
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#
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# canvasWidth is the width of the entire canvas, including the indents
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#
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set data(canvasWidth) [expr {$data(BARS_WIDTH) + $data(PLGN_WIDTH)}]
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# Set the initial color, specified by -initialcolor, or the
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# color chosen by the user the last time.
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set data(selection) $data(-initialcolor)
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set data(finalColor) $data(-initialcolor)
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set rgb [winfo rgb . $data(selection)]
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set data(red,intensity) [expr {[lindex $rgb 0]/0x100}]
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set data(green,intensity) [expr {[lindex $rgb 1]/0x100}]
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set data(blue,intensity) [expr {[lindex $rgb 2]/0x100}]
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}
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# ::tk::dialog::color::Config --
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#
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# Parses the command line arguments to tk_chooseColor
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#
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proc ::tk::dialog::color::Config {dataName argList} {
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variable ::tk::Priv
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upvar ::tk::dialog::color::$dataName data
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# 1: the configuration specs
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#
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if {[info exists Priv(selectColor)] && $Priv(selectColor) ne ""} {
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set defaultColor $Priv(selectColor)
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} else {
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set defaultColor [. cget -background]
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}
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set specs [list \
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[list -initialcolor "" "" $defaultColor] \
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[list -parent "" "" "."] \
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[list -title "" "" [mc "Color"]] \
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]
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# 2: parse the arguments
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#
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tclParseConfigSpec ::tk::dialog::color::$dataName $specs "" $argList
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if {$data(-title) eq ""} {
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set data(-title) " "
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}
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if {[catch {winfo rgb . $data(-initialcolor)} err]} {
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error $err
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}
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if {![winfo exists $data(-parent)]} {
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error "bad window path name \"$data(-parent)\""
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}
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}
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# ::tk::dialog::color::BuildDialog --
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#
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# Build the dialog.
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#
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proc ::tk::dialog::color::BuildDialog {w} {
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upvar ::tk::dialog::color::[winfo name $w] data
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# TopFrame contains the color strips and the color selection
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#
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set topFrame [frame $w.top -relief raised -bd 1]
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# StripsFrame contains the colorstrips and the individual RGB entries
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set stripsFrame [frame $topFrame.colorStrip]
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set maxWidth [::tk::mcmaxamp &Red &Green &Blue]
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set maxWidth [expr {$maxWidth<6 ? 6 : $maxWidth}]
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set colorList {
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red "&Red"
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green "&Green"
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blue "&Blue"
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}
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foreach {color l} $colorList {
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# each f frame contains an [R|G|B] entry and the equiv. color strip.
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set f [frame $stripsFrame.$color]
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# The box frame contains the label and entry widget for an [R|G|B]
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set box [frame $f.box]
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::tk::AmpWidget label $box.label -text "[mc $l]:" \
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-width $maxWidth -anchor ne
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bind $box.label <<AltUnderlined>> [list focus $box.entry]
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entry $box.entry -textvariable \
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::tk::dialog::color::[winfo name $w]($color,intensity) \
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-width 4
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pack $box.label -side left -fill y -padx 2 -pady 3
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pack $box.entry -side left -anchor n -pady 0
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pack $box -side left -fill both
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set height [expr {
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[winfo reqheight $box.entry] -
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2*([$box.entry cget -highlightthickness] + [$box.entry cget -bd])
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}]
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canvas $f.color -height $height \
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-width $data(BARS_WIDTH) -relief sunken -bd 2
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canvas $f.sel -height $data(PLGN_HEIGHT) \
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-width $data(canvasWidth) -highlightthickness 0
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pack $f.color -expand yes -fill both
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pack $f.sel -expand yes -fill both
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pack $f -side top -fill x -padx 0 -pady 2
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set data($color,entry) $box.entry
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set data($color,col) $f.color
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set data($color,sel) $f.sel
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bind $data($color,col) <Configure> \
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[list tk::dialog::color::DrawColorScale $w $color 1]
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bind $data($color,col) <Enter> \
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[list tk::dialog::color::EnterColorBar $w $color]
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bind $data($color,col) <Leave> \
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[list tk::dialog::color::LeaveColorBar $w $color]
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bind $data($color,sel) <Enter> \
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[list tk::dialog::color::EnterColorBar $w $color]
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bind $data($color,sel) <Leave> \
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[list tk::dialog::color::LeaveColorBar $w $color]
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bind $box.entry <Return> [list tk::dialog::color::HandleRGBEntry $w]
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}
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pack $stripsFrame -side left -fill both -padx 4 -pady 10
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# The selFrame contains a frame that demonstrates the currently
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# selected color
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#
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set selFrame [frame $topFrame.sel]
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set lab [::tk::AmpWidget label $selFrame.lab \
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-text [mc "&Selection:"] -anchor sw]
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set ent [entry $selFrame.ent \
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-textvariable ::tk::dialog::color::[winfo name $w](selection) \
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-width 16]
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set f1 [frame $selFrame.f1 -relief sunken -bd 2]
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set data(finalCanvas) [frame $f1.demo -bd 0 -width 100 -height 70]
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pack $lab $ent -side top -fill x -padx 4 -pady 2
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pack $f1 -expand yes -anchor nw -fill both -padx 6 -pady 10
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pack $data(finalCanvas) -expand yes -fill both
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bind $ent <Return> [list tk::dialog::color::HandleSelEntry $w]
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pack $selFrame -side left -fill none -anchor nw
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pack $topFrame -side top -expand yes -fill both -anchor nw
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# the botFrame frame contains the buttons
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#
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set botFrame [frame $w.bot -relief raised -bd 1]
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::tk::AmpWidget button $botFrame.ok -text [mc "&OK"] \
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-command [list tk::dialog::color::OkCmd $w]
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::tk::AmpWidget button $botFrame.cancel -text [mc "&Cancel"] \
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-command [list tk::dialog::color::CancelCmd $w]
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set data(okBtn) $botFrame.ok
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set data(cancelBtn) $botFrame.cancel
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grid x $botFrame.ok x $botFrame.cancel x -sticky ew
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grid configure $botFrame.ok $botFrame.cancel -padx 10 -pady 10
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grid columnconfigure $botFrame {0 4} -weight 1 -uniform space
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grid columnconfigure $botFrame {1 3} -weight 1 -uniform button
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grid columnconfigure $botFrame 2 -weight 2 -uniform space
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pack $botFrame -side bottom -fill x
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# Accelerator bindings
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bind $lab <<AltUnderlined>> [list focus $ent]
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bind $w <KeyPress-Escape> [list tk::ButtonInvoke $data(cancelBtn)]
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bind $w <Alt-Key> [list tk::AltKeyInDialog $w %A]
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wm protocol $w WM_DELETE_WINDOW [list tk::dialog::color::CancelCmd $w]
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bind $lab <Destroy> [list tk::dialog::color::CancelCmd $w]
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}
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# ::tk::dialog::color::SetRGBValue --
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#
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# Sets the current selection of the dialog box
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#
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proc ::tk::dialog::color::SetRGBValue {w color} {
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upvar ::tk::dialog::color::[winfo name $w] data
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set data(red,intensity) [lindex $color 0]
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set data(green,intensity) [lindex $color 1]
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set data(blue,intensity) [lindex $color 2]
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RedrawColorBars $w all
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# Now compute the new x value of each colorbars pointer polygon
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foreach color {red green blue} {
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set x [RgbToX $w $data($color,intensity)]
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MoveSelector $w $data($color,sel) $color $x 0
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}
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}
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# ::tk::dialog::color::XToRgb --
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#
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# Converts a screen coordinate to intensity
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#
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proc ::tk::dialog::color::XToRgb {w x} {
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upvar ::tk::dialog::color::[winfo name $w] data
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set x [expr {($x * $data(intensityIncr))/ $data(colorbarWidth)}]
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if {$x > 255} {
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set x 255
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}
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return $x
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}
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# ::tk::dialog::color::RgbToX
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#
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# Converts an intensity to screen coordinate.
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#
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proc ::tk::dialog::color::RgbToX {w color} {
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upvar ::tk::dialog::color::[winfo name $w] data
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return [expr {($color * $data(colorbarWidth)/ $data(intensityIncr))}]
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}
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# ::tk::dialog::color::DrawColorScale --
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#
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# Draw color scale is called whenever the size of one of the color
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# scale canvases is changed.
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#
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proc ::tk::dialog::color::DrawColorScale {w c {create 0}} {
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upvar ::tk::dialog::color::[winfo name $w] data
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# col: color bar canvas
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# sel: selector canvas
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set col $data($c,col)
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set sel $data($c,sel)
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# First handle the case that we are creating everything for the first time.
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if {$create} {
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# First remove all the lines that already exist.
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if { $data(lines,$c,last) > $data(lines,$c,start)} {
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for {set i $data(lines,$c,start)} \
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{$i <= $data(lines,$c,last)} {incr i} {
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$sel delete $i
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}
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}
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# Delete the selector if it exists
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if {[info exists data($c,index)]} {
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$sel delete $data($c,index)
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}
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# Draw the selection polygons
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CreateSelector $w $sel $c
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$sel bind $data($c,index) <ButtonPress-1> \
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[list tk::dialog::color::StartMove $w $sel $c %x $data(selPad) 1]
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$sel bind $data($c,index) <B1-Motion> \
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[list tk::dialog::color::MoveSelector $w $sel $c %x $data(selPad)]
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$sel bind $data($c,index) <ButtonRelease-1> \
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[list tk::dialog::color::ReleaseMouse $w $sel $c %x $data(selPad)]
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set height [winfo height $col]
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# Create an invisible region under the colorstrip to catch mouse clicks
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# that aren't on the selector.
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set data($c,clickRegion) [$sel create rectangle 0 0 \
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$data(canvasWidth) $height -fill {} -outline {}]
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bind $col <ButtonPress-1> \
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[list tk::dialog::color::StartMove $w $sel $c %x $data(colorPad)]
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bind $col <B1-Motion> \
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[list tk::dialog::color::MoveSelector $w $sel $c %x $data(colorPad)]
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bind $col <ButtonRelease-1> \
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[list tk::dialog::color::ReleaseMouse $w $sel $c %x $data(colorPad)]
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$sel bind $data($c,clickRegion) <ButtonPress-1> \
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[list tk::dialog::color::StartMove $w $sel $c %x $data(selPad)]
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$sel bind $data($c,clickRegion) <B1-Motion> \
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[list tk::dialog::color::MoveSelector $w $sel $c %x $data(selPad)]
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$sel bind $data($c,clickRegion) <ButtonRelease-1> \
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[list tk::dialog::color::ReleaseMouse $w $sel $c %x $data(selPad)]
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} else {
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# l is the canvas index of the first colorbar.
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set l $data(lines,$c,start)
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}
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# Draw the color bars.
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set highlightW [expr {[$col cget -highlightthickness] + [$col cget -bd]}]
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for {set i 0} { $i < $data(NUM_COLORBARS)} { incr i} {
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set intensity [expr {$i * $data(intensityIncr)}]
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set startx [expr {$i * $data(colorbarWidth) + $highlightW}]
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if {$c eq "red"} {
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set color [format "#%02x%02x%02x" \
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$intensity $data(green,intensity) $data(blue,intensity)]
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} elseif {$c eq "green"} {
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set color [format "#%02x%02x%02x" \
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$data(red,intensity) $intensity $data(blue,intensity)]
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} else {
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set color [format "#%02x%02x%02x" \
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$data(red,intensity) $data(green,intensity) $intensity]
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}
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if {$create} {
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set index [$col create rect $startx $highlightW \
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[expr {$startx +$data(colorbarWidth)}] \
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[expr {[winfo height $col] + $highlightW}] \
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-fill $color -outline $color]
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} else {
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$col itemconfigure $l -fill $color -outline $color
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incr l
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}
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}
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$sel raise $data($c,index)
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if {$create} {
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set data(lines,$c,last) $index
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set data(lines,$c,start) [expr {$index - $data(NUM_COLORBARS) + 1}]
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}
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RedrawFinalColor $w
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}
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# ::tk::dialog::color::CreateSelector --
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#
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# Creates and draws the selector polygon at the position
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# $data($c,intensity).
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#
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proc ::tk::dialog::color::CreateSelector {w sel c } {
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upvar ::tk::dialog::color::[winfo name $w] data
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set data($c,index) [$sel create polygon \
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0 $data(PLGN_HEIGHT) \
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$data(PLGN_WIDTH) $data(PLGN_HEIGHT) \
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$data(indent) 0]
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set data($c,x) [RgbToX $w $data($c,intensity)]
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$sel move $data($c,index) $data($c,x) 0
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}
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# ::tk::dialog::color::RedrawFinalColor
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#
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# Combines the intensities of the three colors into the final color
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#
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proc ::tk::dialog::color::RedrawFinalColor {w} {
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upvar ::tk::dialog::color::[winfo name $w] data
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set color [format "#%02x%02x%02x" $data(red,intensity) \
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$data(green,intensity) $data(blue,intensity)]
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|
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$data(finalCanvas) configure -bg $color
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set data(finalColor) $color
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set data(selection) $color
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set data(finalRGB) [list \
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$data(red,intensity) \
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$data(green,intensity) \
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$data(blue,intensity)]
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}
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|
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# ::tk::dialog::color::RedrawColorBars --
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#
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# Only redraws the colors on the color strips that were not manipulated.
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# Params: color of colorstrip that changed. If color is not [red|green|blue]
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# Then all colorstrips will be updated
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#
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proc ::tk::dialog::color::RedrawColorBars {w colorChanged} {
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upvar ::tk::dialog::color::[winfo name $w] data
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|
|
|
switch $colorChanged {
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red {
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DrawColorScale $w green
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DrawColorScale $w blue
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}
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green {
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DrawColorScale $w red
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|
DrawColorScale $w blue
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|
}
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|
blue {
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|
DrawColorScale $w red
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|
DrawColorScale $w green
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}
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default {
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|
DrawColorScale $w red
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DrawColorScale $w green
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DrawColorScale $w blue
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}
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}
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RedrawFinalColor $w
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}
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|
|
|
#----------------------------------------------------------------------
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|
# Event handlers
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|
#----------------------------------------------------------------------
|
|
|
|
# ::tk::dialog::color::StartMove --
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|
#
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|
# 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.
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|
#
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|
# Params: sel is the selector canvas window, color is the color of the strip.
|
|
#
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|
proc ::tk::dialog::color::StartMove {w sel color x delta {dontMove 0}} {
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
if {!$dontMove} {
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|
MoveSelector $w $sel $color $x $delta
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|
}
|
|
}
|
|
|
|
# ::tk::dialog::color::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 ::tk::dialog::color::MoveSelector {w sel color x delta} {
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
incr x -$delta
|
|
|
|
if { $x < 0 } {
|
|
set x 0
|
|
} elseif { $x > $data(BARS_WIDTH)} {
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|
set x $data(BARS_WIDTH)
|
|
}
|
|
set diff [expr {$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
|
|
}
|
|
|
|
# ::tk::dialog::color::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 ::tk::dialog::color::ReleaseMouse {w sel color x delta} {
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
set x [MoveSelector $w $sel $color $x $delta]
|
|
|
|
# Determine exactly what color we are looking at.
|
|
set data($color,intensity) [XToRgb $w $x]
|
|
|
|
RedrawColorBars $w $color
|
|
}
|
|
|
|
# ::tk::dialog::color::ResizeColorbars --
|
|
#
|
|
# Completely redraws the colorbars, including resizing the
|
|
# colorstrips
|
|
#
|
|
proc ::tk::dialog::color::ResizeColorBars {w} {
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
if {
|
|
($data(BARS_WIDTH) < $data(NUM_COLORBARS)) ||
|
|
(($data(BARS_WIDTH) % $data(NUM_COLORBARS)) != 0)
|
|
} then {
|
|
set data(BARS_WIDTH) $data(NUM_COLORBARS)
|
|
}
|
|
InitValues [winfo name $w]
|
|
foreach color {red green blue} {
|
|
$data($color,col) configure -width $data(canvasWidth)
|
|
DrawColorScale $w $color 1
|
|
}
|
|
}
|
|
|
|
# ::tk::dialog::color::HandleSelEntry --
|
|
#
|
|
# Handles the return keypress event in the "Selection:" entry
|
|
#
|
|
proc ::tk::dialog::color::HandleSelEntry {w} {
|
|
upvar ::tk::dialog::color::[winfo name $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}]
|
|
|
|
SetRGBValue $w "$R $G $B"
|
|
set data(selection) $text
|
|
}
|
|
|
|
# ::tk::dialog::color::HandleRGBEntry --
|
|
#
|
|
# Handles the return keypress event in the R, G or B entry
|
|
#
|
|
proc ::tk::dialog::color::HandleRGBEntry {w} {
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
foreach c {red green blue} {
|
|
if {[catch {
|
|
set data($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
|
|
}
|
|
}
|
|
|
|
SetRGBValue $w "$data(red,intensity) \
|
|
$data(green,intensity) $data(blue,intensity)"
|
|
}
|
|
|
|
# mouse cursor enters a color bar
|
|
#
|
|
proc ::tk::dialog::color::EnterColorBar {w color} {
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
$data($color,sel) itemconfigure $data($color,index) -fill red
|
|
}
|
|
|
|
# mouse leaves enters a color bar
|
|
#
|
|
proc ::tk::dialog::color::LeaveColorBar {w color} {
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
$data($color,sel) itemconfigure $data($color,index) -fill black
|
|
}
|
|
|
|
# user hits OK button
|
|
#
|
|
proc ::tk::dialog::color::OkCmd {w} {
|
|
variable ::tk::Priv
|
|
upvar ::tk::dialog::color::[winfo name $w] data
|
|
|
|
set Priv(selectColor) $data(finalColor)
|
|
}
|
|
|
|
# user hits Cancel button or destroys window
|
|
#
|
|
proc ::tk::dialog::color::CancelCmd {w} {
|
|
variable ::tk::Priv
|
|
set Priv(selectColor) ""
|
|
}
|