# General purpose code for being a tray applet
-proc manyset {list args} {
- foreach val $list var $args {
- upvar 1 $var my
- set my $val
- }
-}
-
-
package require Tclx
package require tktray
#
# tk::tktray widget is called .i
#
-# Inner window subprocess:
+# Tooltip:
#
-# Caller that needs access to inner window should define
-# proc innerwindow {} { ... }
-# and run
-# innerwindow
-# This will create
-# .i.i.b frame to contain container
-# .i.i.b.c actual container
+# Caller may call
+# applet::setup-tooltip ON-VISIBLE ON-INVISIBLE
+# to make applet have a tooltip.
+#
+# ON-VISIBLE and ON-INVISIBLE will be globally eval'd
+# when the tooltip becomes visible and invisible.
+#
+# Caller should call
+# applet::tooltip-set TEXT-MAYBE-MULTILINE
+# whenever they like.
#
-# Button presses
+# Button presses
#
# Caller may bind .i.i <ButtonPress-$b>
#
# Alternatively caller may call applet::setup-button-menu $b
# which will generate a menu .m$b which the user can configure
# and which will automatically be posted and unposted etc.
+# In this case the caller should arrange that all of their
+# menus, when an item is selected, call
+# applet::msel
+#
+# Icon:
+#
+# Caller should call:
+# applet::setimage IMAGE
+# as necessary.
+#
+# Alternatively of icon, it may provide other arrangements for
+# using the provided subwindow. Such a caller should call
+# applet::setup-subwindow ON-DESTROYING ON-READY
+# Then the main code will call ON-DESTROYING just before
+# destroying the inner window and recreating it, and
+# [concat ON-READY [list ORIENTATION]]
+# just after. The inner window to use is called .i.i.b.
+#
+# This uses variables, in the applet namespace,
+# w h border_colour border_width deforient
+# These should be set before setup-subwindow is called and not
+# modified thereafter.
+#
+# The user of the subwindow machinery may call
+# applet::subwindow-need-recreate
+# if for any reason the inner window should be destroyed and recreated.
+#
+# Alternatively, it may request that a subprocess be spawned
+# repeatedly with the xid of a suitable window.
+# applet::setup-subproc GET-CMDLINE
+# Then the main code will call [concat GET_CMDLINE [list XID ORIENTATION]]
+# to get the command line to run.
+#
+# This also uses the same variables as setup-subwindow.
wm withdraw .
tktray::icon .i -class example
.i configure -docked 1
+fconfigure stdout -buffering none
+fconfigure stderr -buffering none
+
namespace eval applet {
+# used by both menus and tooltips
variable posted 0
+#----- menus -----
+
proc setup-button-menu {b} {
bind .i.i <ButtonPress> { applet::menubuttonpressed %b %X %Y }
menu .m$b -tearoff 0
variable posted
tooltip-cancel
if {$posted == $b} {
- puts "unpost $posted toggle"
+ debug::debug "unpost $posted toggle"
.m$posted unpost
set posted 0
} elseif {[winfo exists .m$b]} {
if {$posted} {
.m$posted unpost
- puts "unpost $posted other"
+ debug::debug "unpost $posted other"
}
- puts "post $b"
+ debug::debug "post $b"
set posted $b
.m$b post $x $y
}
set posted 0
}
-}
+#----- tooltips -----
-proc innerwindow-resetup-required {why} {
- variable innerwindow_after
-puts "IW-EVENT $why"
- if {[info exists innerwindow_after]} return
- set innerwindow_after [after idle innerwindow-resetup]
-}
-
-proc innerwindow-resetup {} {
- variable innerwindow_after
- unset innerwindow_after
-
-puts RESETUP
-
- innerwindow-destroying
-
- catch { destroy .i.i.c }
- if {![winfo exists .i.i]} return
- destroy [frame .i.i.make-exist]
- catch { destroy .i.i.b.c }
- catch { destroy .i.i.b }
- frame .i.i.b
- pack .i.i.b -fill both -side left -expand 1
- frame .i.i.b.c -container 1 -background orange
- pack .i.i.b.c -fill both -side left -expand 1
-#
- global inner_lastw inner_lasth
- #set w [winfo width .i.i]
-# set w [winfo width .i.i]
-# set h [winfo height .i.i]
-
-# if {$w != $inner_lastw || $h != $inner_lasth} {
-# set inner_lastw $w
-# set inner_lasth $h
-# innerwindow-ph-dummy configure -width $w -height 2
- innerwindow-ready
-# }
-}
-
-proc setupinnerwindow {w} {
- global inner_lastw inner_lasth
- set inner_lastw -2
- set inner_lasth -2
-
- image create photo innerwindow-ph-dummy -width $w -height 2
- .i configure -image innerwindow-ph-dummy
-
- destroy [frame .i.make-exist]
- destroy [frame .i.i.make-exist]
- bind .i <<IconConfigure>> { innerwindow-resetup-required IconConfigure }
-}
-
-namespace eval applet {
+variable tooltip_on_vis {}
+variable tooltip_on_invis {}
proc tooltip-starttimer {state x y} {
variable tooltip_after
proc tooltip-cancel {} {
variable tooltip_after
+ variable tooltip_on_invis
catch { after cancel $tooltip_after }
catch { unset $tooltip_after }
wm withdraw .tt
+ uplevel #0 $tooltip_on_invis
}
set tooltip_inwindow 0
tooltip-cancel
}
-proc setup-tooltip {} {
+proc setup-tooltip {on_vis on_invis} {
+ foreach v {vis invis} {
+ variable tooltip_on_$v [set on_$v]
+ }
bind .i <Enter> { applet::tooltip-enter %s %X %Y }
bind .i <Leave> { applet::tooltip-leave }
bind .i <ButtonRelease> {
}
proc tooltip-show {x y} {
+ variable tooltip_on_vis
incr x 9
incr y 9
wm geometry .tt +$x+$y
wm deiconify .tt
+ uplevel #0 $tooltip_on_vis
}
-}
+#----- simple images -----
proc setimage {image} {
.i configure -image $image
}
-proc fork-then {ondeath inchild} {
- global children errorCode errorInfo
- foreach f {stdout stderr} {
- if {[catch { flush $f } emsg]} {
- catch { bgerror $emsg }
- }
+#----- subwindow -----
+
+variable subwindow_on_destroying
+variable subwindow_on_ready
+
+variable w 50
+variable h 50
+variable deforient horizontal
+variable border_colour darkblue
+variable border_width 1
+
+proc subwindow-need-recreate {} {
+ variable innerwindow_after
+ debug::debug "IW-EVENT"
+ if {[info exists innerwindow_after]} return
+ set innerwindow_after [after idle applet::innerwindow-resetup]
+}
+
+proc innerwindow-resetup {} {
+ variable innerwindow_after
+ variable subwindow_on_destroying
+ variable subwindow_on_ready
+ variable border_colour
+ variable border_width
+ variable deforient
+ unset innerwindow_after
+
+ debug::debug RESETUP
+
+ if {![winfo exists .i.i]} return
+ destroy [frame .i.i.make-exist]
+
+ uplevel #0 $subwindow_on_destroying
+ catch { destroy .i.i.b }
+
+ set orientation [.i orientation]
+ debug::debug "orientation $orientation"
+ if {![string compare $orientation unknown]} {
+ set orientation $deforient
}
- set pid [fork]
- if {!$pid} {
- if {[catch {
- uplevel 1 $inchild
- } emsg]} {
- puts stderr "CHILD ERROR $emsg\n$errorCode\n$errorInfo\n"
+ .i configure -image applet::innerwindow-ph-$orientation
+
+ frame .i.i.b -background $border_colour -bd $border_width
+ pack .i.i.b -fill both -side left -expand 1
+
+ uplevel #0 $subwindow_on_ready [list $orientation]
+}
+
+proc setup-subwindow {on_destroying on_ready} {
+ variable w
+ variable h
+
+ foreach v {on_destroying on_ready} {
+ variable subwindow_$v [set $v]
+ }
+
+ image create photo applet::innerwindow-ph-horizontal -width $w -height 2
+ image create photo applet::innerwindow-ph-vertical -width 2 -height $h
+ .i configure -image applet::innerwindow-ph-horizontal
+
+ destroy [frame .i.make-exist]
+ destroy [frame .i.i.make-exist]
+ bind .i <<IconConfigure>> {
+ applet::subwindow-need-recreate
+ }
+}
+
+#----- subprocess -----
+
+variable subproc none
+variable ratelimit {}
+
+proc setup-subproc {get_cmdline} {
+ variable subproc_get_cmdline $get_cmdline
+ setup-subwindow applet::subproc-destroying applet::subproc-ready
+}
+
+proc subproc-destroying {} {
+ variable subproc
+ debug::debug "DESTROYING $subproc"
+
+ catch { destroy .i.i.b.c }
+
+ switch -exact $subproc {
+ none { }
+ old { }
+ default { kill $subproc; set subproc old }
+ }
+}
+
+proc subproc-ready {orientation} {
+ variable subproc
+ variable subproc_orientation $orientation
+ debug::debug "READY $subproc"
+
+ frame .i.i.b.c -container 1 -background orange
+ pack .i.i.b.c -fill both -side left -expand 1
+
+ switch -exact $subproc {
+ none {
+ run-child
+ }
+ old {
+ # wait for it to die
}
- kill KILL [id process]
+ default {
+ error "unexpected state $subproc"
+ }
+ }
+ debug::debug "READY-done $subproc"
+}
+
+proc run-child {} {
+ variable subproc
+ variable ratelimit
+ variable subproc_get_cmdline
+ variable subproc_orientation
+
+ set id [winfo id .i.i.b.c]
+ set cmd [uplevel #0 $subproc_get_cmdline [list $id $subproc_orientation]]
+
+ debug::debug "RUN-CHILD $subproc"
+ set now [clock seconds]
+ lappend ratelimit $now
+ while {[lindex $ratelimit 0] < {$now - 10}} {
+ set ratelimit [lrange $ratelimit 1 end]
+ }
+ if {[llength $ratelimit] > 10} {
+ puts stderr "crashing repeatedly, quitting $ratelimit"
+ exit 127
}
- set children($pid) $ondeath
- return $pid
-}
-
-proc chld-handler {} {
- global children
- while 1 {
- if {[catch { set got [wait -nohang] }]} break
- if {![llength $got]} break
- manyset $got pid how how2
- if {[info exists children($pid)]} {
- set l $children($pid)
- unset children($pid)
- if {[catch {
- uplevel #0 [concat [list $l] $how $how2]
- } emsg]} {
- catch { bgerror $emsg }
- }
+
+ set subproc none
+ set subproc [subproc::fork applet::child-died {
+ execl [lindex $cmd 0] [lrange $cmd 1 end]
+ }]
+ debug::debug "FORKED $subproc"
+}
+
+proc child-died {how how2} {
+ debug::debug "DIED $how $how2"
+ variable subproc
+ switch -exact $subproc {
+ old {
+ set subproc none
+ run-child
}
- }
+ default {
+ set subproc none
+ subwindow-need-recreate
+ }
+ }
}
-signal -restart trap CHLD { after idle chld-handler }
+}
~ian / chiark-tcl-applet.git / blobdiff