# button.tcl -- # # This file defines the default bindings for Tk label, button, # checkbutton, and radiobutton widgets and provides procedures # that help in implementing those bindings. # # Copyright (c) 1992-1994 The Regents of the University of California. # Copyright (c) 1994-1996 Sun Microsystems, Inc. # Copyright (c) 2002 ActiveState Corporation. # # See the file "license.terms" for information on usage and redistribution # of this file, and for a DISCLAIMER OF ALL WARRANTIES. # #------------------------------------------------------------------------- # The code below creates the default class bindings for buttons. #------------------------------------------------------------------------- if {[tk windowingsystem] eq "aqua"} { bind Radiobutton { tk::ButtonEnter %W } bind Radiobutton <1> { tk::ButtonDown %W } bind Radiobutton { tk::ButtonUp %W } bind Checkbutton { tk::ButtonEnter %W } bind Checkbutton <1> { tk::ButtonDown %W } bind Checkbutton { tk::ButtonUp %W } bind Checkbutton { tk::ButtonLeave %W } } if {"win32" eq [tk windowingsystem]} { bind Checkbutton { tk::CheckRadioInvoke %W select } bind Checkbutton { tk::CheckRadioInvoke %W select } bind Checkbutton { tk::CheckRadioInvoke %W deselect } bind Checkbutton <1> { tk::CheckRadioDown %W } bind Checkbutton { tk::ButtonUp %W } bind Checkbutton { tk::CheckRadioEnter %W } bind Checkbutton { tk::ButtonLeave %W } bind Radiobutton <1> { tk::CheckRadioDown %W } bind Radiobutton { tk::ButtonUp %W } bind Radiobutton { tk::CheckRadioEnter %W } } if {"x11" eq [tk windowingsystem]} { bind Checkbutton { if {!$tk_strictMotif} { tk::CheckInvoke %W } } bind Radiobutton { if {!$tk_strictMotif} { tk::CheckRadioInvoke %W } } bind Checkbutton <1> { tk::CheckInvoke %W } bind Radiobutton <1> { tk::CheckRadioInvoke %W } bind Checkbutton { tk::CheckEnter %W } bind Radiobutton { tk::ButtonEnter %W } bind Checkbutton { tk::CheckLeave %W } } bind Button { tk::ButtonInvoke %W } bind Checkbutton { tk::CheckRadioInvoke %W } bind Radiobutton { tk::CheckRadioInvoke %W } bind Button <> { tk::ButtonInvoke %W } bind Checkbutton <> { tk::CheckRadioInvoke %W } bind Radiobutton <> { tk::CheckRadioInvoke %W } bind Button {} bind Button { tk::ButtonEnter %W } bind Button { tk::ButtonLeave %W } bind Button <1> { tk::ButtonDown %W } bind Button { tk::ButtonUp %W } bind Checkbutton {} bind Radiobutton {} bind Radiobutton { tk::ButtonLeave %W } if {"win32" eq [tk windowingsystem]} { ######################### # Windows implementation ######################### # ::tk::ButtonEnter -- # The procedure below is invoked when the mouse pointer enters a # button widget. It records the button we're in and changes the # state of the button to active unless the button is disabled. # # Arguments: # w - The name of the widget. proc ::tk::ButtonEnter w { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { # If the mouse button is down, set the relief to sunken on entry. # Overwise, if there's an -overrelief value, set the relief to that. set Priv($w,relief) [$w cget -relief] if {$Priv(buttonWindow) eq $w} { $w configure -relief sunken -state active set Priv($w,prelief) sunken } elseif {[set over [$w cget -overrelief]] ne ""} { $w configure -relief $over set Priv($w,prelief) $over } } set Priv(window) $w } # ::tk::ButtonLeave -- # The procedure below is invoked when the mouse pointer leaves a # button widget. It changes the state of the button back to inactive. # Restore any modified relief too. # # Arguments: # w - The name of the widget. proc ::tk::ButtonLeave w { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { $w configure -state normal } # Restore the original button relief if it was changed by Tk. # That is signaled by the existence of Priv($w,prelief). if {[info exists Priv($w,relief)]} { if {[info exists Priv($w,prelief)] && \ $Priv($w,prelief) eq [$w cget -relief]} { $w configure -relief $Priv($w,relief) } unset -nocomplain Priv($w,relief) Priv($w,prelief) } set Priv(window) "" } # ::tk::ButtonDown -- # The procedure below is invoked when the mouse button is pressed in # a button widget. It records the fact that the mouse is in the button, # saves the button's relief so it can be restored later, and changes # the relief to sunken. # # Arguments: # w - The name of the widget. proc ::tk::ButtonDown w { variable ::tk::Priv # Only save the button's relief if it does not yet exist. If there # is an overrelief setting, Priv($w,relief) will already have been set, # and the current value of the -relief option will be incorrect. if {![info exists Priv($w,relief)]} { set Priv($w,relief) [$w cget -relief] } if {[$w cget -state] ne "disabled"} { set Priv(buttonWindow) $w $w configure -relief sunken -state active set Priv($w,prelief) sunken # If this button has a repeatdelay set up, get it going with an after after cancel $Priv(afterId) set delay [$w cget -repeatdelay] set Priv(repeated) 0 if {$delay > 0} { set Priv(afterId) [after $delay [list tk::ButtonAutoInvoke $w]] } } } # ::tk::ButtonUp -- # The procedure below is invoked when the mouse button is released # in a button widget. It restores the button's relief and invokes # the command as long as the mouse hasn't left the button. # # Arguments: # w - The name of the widget. proc ::tk::ButtonUp w { variable ::tk::Priv if {$Priv(buttonWindow) eq $w} { set Priv(buttonWindow) "" # Restore the button's relief if it was cached. if {[info exists Priv($w,relief)]} { if {[info exists Priv($w,prelief)] && \ $Priv($w,prelief) eq [$w cget -relief]} { $w configure -relief $Priv($w,relief) } unset -nocomplain Priv($w,relief) Priv($w,prelief) } # Clean up the after event from the auto-repeater after cancel $Priv(afterId) if {$Priv(window) eq $w && [$w cget -state] ne "disabled"} { $w configure -state normal # Only invoke the command if it wasn't already invoked by the # auto-repeater functionality if { $Priv(repeated) == 0 } { uplevel #0 [list $w invoke] } } } } # ::tk::CheckRadioEnter -- # The procedure below is invoked when the mouse pointer enters a # checkbutton or radiobutton widget. It records the button we're in # and changes the state of the button to active unless the button is # disabled. # # Arguments: # w - The name of the widget. proc ::tk::CheckRadioEnter w { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { if {$Priv(buttonWindow) eq $w} { $w configure -state active } if {[set over [$w cget -overrelief]] ne ""} { set Priv($w,relief) [$w cget -relief] set Priv($w,prelief) $over $w configure -relief $over } } set Priv(window) $w } # ::tk::CheckRadioDown -- # The procedure below is invoked when the mouse button is pressed in # a button widget. It records the fact that the mouse is in the button, # saves the button's relief so it can be restored later, and changes # the relief to sunken. # # Arguments: # w - The name of the widget. proc ::tk::CheckRadioDown w { variable ::tk::Priv if {![info exists Priv($w,relief)]} { set Priv($w,relief) [$w cget -relief] } if {[$w cget -state] ne "disabled"} { set Priv(buttonWindow) $w set Priv(repeated) 0 $w configure -state active } } } if {"x11" eq [tk windowingsystem]} { ##################### # Unix implementation ##################### # ::tk::ButtonEnter -- # The procedure below is invoked when the mouse pointer enters a # button widget. It records the button we're in and changes the # state of the button to active unless the button is disabled. # # Arguments: # w - The name of the widget. proc ::tk::ButtonEnter {w} { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { # On unix the state is active just with mouse-over $w configure -state active # If the mouse button is down, set the relief to sunken on entry. # Overwise, if there's an -overrelief value, set the relief to that. set Priv($w,relief) [$w cget -relief] if {$Priv(buttonWindow) eq $w} { $w configure -relief sunken set Priv($w,prelief) sunken } elseif {[set over [$w cget -overrelief]] ne ""} { $w configure -relief $over set Priv($w,prelief) $over } } set Priv(window) $w } # ::tk::ButtonLeave -- # The procedure below is invoked when the mouse pointer leaves a # button widget. It changes the state of the button back to inactive. # Restore any modified relief too. # # Arguments: # w - The name of the widget. proc ::tk::ButtonLeave w { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { $w configure -state normal } # Restore the original button relief if it was changed by Tk. # That is signaled by the existence of Priv($w,prelief). if {[info exists Priv($w,relief)]} { if {[info exists Priv($w,prelief)] && \ $Priv($w,prelief) eq [$w cget -relief]} { $w configure -relief $Priv($w,relief) } unset -nocomplain Priv($w,relief) Priv($w,prelief) } set Priv(window) "" } # ::tk::ButtonDown -- # The procedure below is invoked when the mouse button is pressed in # a button widget. It records the fact that the mouse is in the button, # saves the button's relief so it can be restored later, and changes # the relief to sunken. # # Arguments: # w - The name of the widget. proc ::tk::ButtonDown w { variable ::tk::Priv # Only save the button's relief if it does not yet exist. If there # is an overrelief setting, Priv($w,relief) will already have been set, # and the current value of the -relief option will be incorrect. if {![info exists Priv($w,relief)]} { set Priv($w,relief) [$w cget -relief] } if {[$w cget -state] ne "disabled"} { set Priv(buttonWindow) $w $w configure -relief sunken set Priv($w,prelief) sunken # If this button has a repeatdelay set up, get it going with an after after cancel $Priv(afterId) set delay [$w cget -repeatdelay] set Priv(repeated) 0 if {$delay > 0} { set Priv(afterId) [after $delay [list tk::ButtonAutoInvoke $w]] } } } # ::tk::ButtonUp -- # The procedure below is invoked when the mouse button is released # in a button widget. It restores the button's relief and invokes # the command as long as the mouse hasn't left the button. # # Arguments: # w - The name of the widget. proc ::tk::ButtonUp w { variable ::tk::Priv if {$w eq $Priv(buttonWindow)} { set Priv(buttonWindow) "" # Restore the button's relief if it was cached. if {[info exists Priv($w,relief)]} { if {[info exists Priv($w,prelief)] && \ $Priv($w,prelief) eq [$w cget -relief]} { $w configure -relief $Priv($w,relief) } unset -nocomplain Priv($w,relief) Priv($w,prelief) } # Clean up the after event from the auto-repeater after cancel $Priv(afterId) if {$Priv(window) eq $w && [$w cget -state] ne "disabled"} { # Only invoke the command if it wasn't already invoked by the # auto-repeater functionality if { $Priv(repeated) == 0 } { uplevel #0 [list $w invoke] } } } } } if {[tk windowingsystem] eq "aqua"} { #################### # Mac implementation #################### # ::tk::ButtonEnter -- # The procedure below is invoked when the mouse pointer enters a # button widget. It records the button we're in and changes the # state of the button to active unless the button is disabled. # # Arguments: # w - The name of the widget. proc ::tk::ButtonEnter {w} { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { # If there's an -overrelief value, set the relief to that. if {$Priv(buttonWindow) eq $w} { $w configure -state active } elseif {[set over [$w cget -overrelief]] ne ""} { set Priv($w,relief) [$w cget -relief] set Priv($w,prelief) $over $w configure -relief $over } } set Priv(window) $w } # ::tk::ButtonLeave -- # The procedure below is invoked when the mouse pointer leaves a # button widget. It changes the state of the button back to # inactive. If we're leaving the button window with a mouse button # pressed (Priv(buttonWindow) == $w), restore the relief of the # button too. # # Arguments: # w - The name of the widget. proc ::tk::ButtonLeave w { variable ::tk::Priv if {$w eq $Priv(buttonWindow)} { $w configure -state normal } # Restore the original button relief if it was changed by Tk. # That is signaled by the existence of Priv($w,prelief). if {[info exists Priv($w,relief)]} { if {[info exists Priv($w,prelief)] && \ $Priv($w,prelief) eq [$w cget -relief]} { $w configure -relief $Priv($w,relief) } unset -nocomplain Priv($w,relief) Priv($w,prelief) } set Priv(window) "" } # ::tk::ButtonDown -- # The procedure below is invoked when the mouse button is pressed in # a button widget. It records the fact that the mouse is in the button, # saves the button's relief so it can be restored later, and changes # the relief to sunken. # # Arguments: # w - The name of the widget. proc ::tk::ButtonDown w { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { set Priv(buttonWindow) $w $w configure -state active # If this button has a repeatdelay set up, get it going with an after after cancel $Priv(afterId) set Priv(repeated) 0 if { ![catch {$w cget -repeatdelay} delay] } { if {$delay > 0} { set Priv(afterId) [after $delay [list tk::ButtonAutoInvoke $w]] } } } } # ::tk::ButtonUp -- # The procedure below is invoked when the mouse button is released # in a button widget. It restores the button's relief and invokes # the command as long as the mouse hasn't left the button. # # Arguments: # w - The name of the widget. proc ::tk::ButtonUp w { variable ::tk::Priv if {$Priv(buttonWindow) eq $w} { set Priv(buttonWindow) "" $w configure -state normal # Restore the button's relief if it was cached. if {[info exists Priv($w,relief)]} { if {[info exists Priv($w,prelief)] && \ $Priv($w,prelief) eq [$w cget -relief]} { $w configure -relief $Priv($w,relief) } unset -nocomplain Priv($w,relief) Priv($w,prelief) } # Clean up the after event from the auto-repeater after cancel $Priv(afterId) if {$Priv(window) eq $w && [$w cget -state] ne "disabled"} { # Only invoke the command if it wasn't already invoked by the # auto-repeater functionality if { $Priv(repeated) == 0 } { uplevel #0 [list $w invoke] } } } } } ################## # Shared routines ################## # ::tk::ButtonInvoke -- # The procedure below is called when a button is invoked through # the keyboard. It simulate a press of the button via the mouse. # # Arguments: # w - The name of the widget. proc ::tk::ButtonInvoke w { if {[winfo exists $w] && [$w cget -state] ne "disabled"} { set oldRelief [$w cget -relief] set oldState [$w cget -state] $w configure -state active -relief sunken after 100 [list ::tk::ButtonInvokeEnd $w $oldState $oldRelief] } } # ::tk::ButtonInvokeEnd -- # The procedure below is called after a button is invoked through # the keyboard. It simulate a release of the button via the mouse. # # Arguments: # w - The name of the widget. # oldState - Old state to be set back. # oldRelief - Old relief to be set back. proc ::tk::ButtonInvokeEnd {w oldState oldRelief} { if {[winfo exists $w]} { $w configure -state $oldState -relief $oldRelief uplevel #0 [list $w invoke] } } # ::tk::ButtonAutoInvoke -- # # Invoke an auto-repeating button, and set it up to continue to repeat. # # Arguments: # w button to invoke. # # Results: # None. # # Side effects: # May create an after event to call ::tk::ButtonAutoInvoke. proc ::tk::ButtonAutoInvoke {w} { variable ::tk::Priv after cancel $Priv(afterId) set delay [$w cget -repeatinterval] if {$Priv(window) eq $w} { incr Priv(repeated) uplevel #0 [list $w invoke] } if {$delay > 0} { set Priv(afterId) [after $delay [list tk::ButtonAutoInvoke $w]] } } # ::tk::CheckRadioInvoke -- # The procedure below is invoked when the mouse button is pressed in # a checkbutton or radiobutton widget, or when the widget is invoked # through the keyboard. It invokes the widget if it # isn't disabled. # # Arguments: # w - The name of the widget. # cmd - The subcommand to invoke (one of invoke, select, or deselect). proc ::tk::CheckRadioInvoke {w {cmd invoke}} { if {[$w cget -state] ne "disabled"} { uplevel #0 [list $w $cmd] } } # Special versions of the handlers for checkbuttons on Unix that do the magic # to make things work right when the checkbutton indicator is hidden; # radiobuttons don't need this complexity. # ::tk::CheckInvoke -- # The procedure below invokes the checkbutton, like ButtonInvoke, but handles # what to do when the checkbutton indicator is missing. Only used on Unix. # # Arguments: # w - The name of the widget. proc ::tk::CheckInvoke {w} { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { # Additional logic to switch the "selected" colors around if necessary # (when we're indicator-less). if {![$w cget -indicatoron] && [info exist Priv($w,selectcolor)]} { if {[$w cget -selectcolor] eq $Priv($w,aselectcolor)} { $w configure -selectcolor $Priv($w,selectcolor) } else { $w configure -selectcolor $Priv($w,aselectcolor) } } uplevel #0 [list $w invoke] } } # ::tk::CheckEnter -- # The procedure below enters the checkbutton, like ButtonEnter, but handles # what to do when the checkbutton indicator is missing. Only used on Unix. # # Arguments: # w - The name of the widget. proc ::tk::CheckEnter {w} { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { # On unix the state is active just with mouse-over $w configure -state active # If the mouse button is down, set the relief to sunken on entry. # Overwise, if there's an -overrelief value, set the relief to that. set Priv($w,relief) [$w cget -relief] if {$Priv(buttonWindow) eq $w} { $w configure -relief sunken set Priv($w,prelief) sunken } elseif {[set over [$w cget -overrelief]] ne ""} { $w configure -relief $over set Priv($w,prelief) $over } # Compute what the "selected and active" color should be. if {![$w cget -indicatoron] && [$w cget -selectcolor] ne ""} { set Priv($w,selectcolor) [$w cget -selectcolor] lassign [winfo rgb $w [$w cget -selectcolor]] r1 g1 b1 lassign [winfo rgb $w [$w cget -activebackground]] r2 g2 b2 set Priv($w,aselectcolor) \ [format "#%04x%04x%04x" [expr {($r1+$r2)/2}] \ [expr {($g1+$g2)/2}] [expr {($b1+$b2)/2}]] # use uplevel to work with other var resolvers if {[uplevel #0 [list set [$w cget -variable]]] eq [$w cget -onvalue]} { $w configure -selectcolor $Priv($w,aselectcolor) } } } set Priv(window) $w } # ::tk::CheckLeave -- # The procedure below leaves the checkbutton, like ButtonLeave, but handles # what to do when the checkbutton indicator is missing. Only used on Unix. # # Arguments: # w - The name of the widget. proc ::tk::CheckLeave {w} { variable ::tk::Priv if {[$w cget -state] ne "disabled"} { $w configure -state normal } # Restore the original button "selected" color; but only if the user # has not changed it in the meantime. if {![$w cget -indicatoron] && [info exist Priv($w,selectcolor)]} { if {[$w cget -selectcolor] eq $Priv($w,selectcolor) || ([info exist Priv($w,aselectcolor)] && [$w cget -selectcolor] eq $Priv($w,aselectcolor))} { $w configure -selectcolor $Priv($w,selectcolor) } } unset -nocomplain Priv($w,selectcolor) Priv($w,aselectcolor) # Restore the original button relief if it was changed by Tk. That is # signaled by the existence of Priv($w,prelief). if {[info exists Priv($w,relief)]} { if {[info exists Priv($w,prelief)] && \ $Priv($w,prelief) eq [$w cget -relief]} { $w configure -relief $Priv($w,relief) } unset -nocomplain Priv($w,relief) Priv($w,prelief) } set Priv(window) "" } return # Local Variables: # mode: tcl # fill-column: 78 # End: