# Caller should call
# applet::tooltip-set TEXT-MAYBE-MULTILINE
# whenever they like.
-#
-# Inner window subprocess:
-#
-# 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
#
-# Button presses
+# Button presses
#
# Caller may bind .i.i <ButtonPress-$b>
#
# In this case the caller should arrange that all of their
# menus, when an item is selected, call
# applet::msel
+#
+# Debug:
+#
+# Caller may call
+# applet::setup-debug ON-DEBUG
+# which will result in calls to [concat ON-DEBUG [list MESSAGE]]
+# (or ON-DEBUG may be "" in which case messages are discarded)
+#
+# 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 WIDTH BORDER-COLOUR BORDER-WIDTH \
+# ON-DESTROYING ON-READY
+# Then the main code will call ON-DESTROYING just before
+# destroying the inner window and recreating it, and ON-READY
+# just after. The inner window to use is called .i.i.b.
+#
+# 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 WIDTH BORDER-COLOUR BORDER-WIDTH \
+# GET-CMDLINE
+# Then the main code will call [concat GET_CMDLINE [list XID]]
+# to get the command line to run.
wm withdraw .
tktray::icon .i -class example
.i configure -docked 1
+fconfigure stdout -buffering none
+fconfigure stderr -buffering none
+
namespace eval applet {
+variable debug {}
+
+proc debug {m} {
+ variable debug
+ if {![llength debug]} return
+ uplevel #0 $debug [list $m]
+}
+
+proc setup-debug {d} {
+ variable debug $d
+}
# used by both menus and tooltips
variable posted 0
variable posted
tooltip-cancel
if {$posted == $b} {
- puts "unpost $posted toggle"
+ 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 "unpost $posted other"
}
- puts "post $b"
+ debug "post $b"
set posted $b
.m$b post $x $y
}
uplevel #0 $tooltip_on_vis
}
+#----- simple images -----
+
+proc setimage {image} {
+ .i configure -image $image
}
+#----- subwindow -----
-proc innerwindow-resetup-required {why} {
+variable subwindow_on_destroying
+variable subwindow_on_ready
+
+proc subwindow-need-recreate {} {
variable innerwindow_after
-puts "IW-EVENT $why"
+ debug "IW-EVENT"
if {[info exists innerwindow_after]} return
- set innerwindow_after [after idle innerwindow-resetup]
+ set innerwindow_after [after idle applet::innerwindow-resetup]
}
proc innerwindow-resetup {} {
variable innerwindow_after
+ variable subwindow_on_destroying
+ variable subwindow_on_ready
+ variable subwindow_border_colour
+ variable subwindow_border_width
unset innerwindow_after
-puts RESETUP
-
- innerwindow-destroying
+ debug RESETUP
- catch { destroy .i.i.c }
if {![winfo exists .i.i]} return
destroy [frame .i.i.make-exist]
- catch { destroy .i.i.b.c }
+
+ uplevel #0 $subwindow_on_destroying
catch { destroy .i.i.b }
- frame .i.i.b
+
+ frame .i.i.b -background darkblue -bd 1
pack .i.i.b -fill both -side left -expand 1
- frame .i.i.b.c -container 1 -background orange
- pack .i.i.b.c -fill both -side left -expand 1
-#
- global inner_lastw inner_lasth
- #set w [winfo width .i.i]
-# set w [winfo width .i.i]
-# set h [winfo height .i.i]
-# if {$w != $inner_lastw || $h != $inner_lasth} {
-# set inner_lastw $w
-# set inner_lasth $h
-# innerwindow-ph-dummy configure -width $w -height 2
- innerwindow-ready
-# }
+ uplevel #0 $subwindow_on_ready
}
-proc setupinnerwindow {w} {
- global inner_lastw inner_lasth
- set inner_lastw -2
- set inner_lasth -2
+proc setup-subwindow {w border_colour border_width on_destroying on_ready} {
+ foreach v {border_width border_colour on_destroying on_ready} {
+ variable subwindow_$v [set $v]
+ }
- image create photo innerwindow-ph-dummy -width $w -height 2
- .i configure -image innerwindow-ph-dummy
+ image create photo applet::innerwindow-ph-dummy -width $w -height 2
+ .i configure -image applet::innerwindow-ph-dummy
destroy [frame .i.make-exist]
destroy [frame .i.i.make-exist]
- bind .i <<IconConfigure>> { innerwindow-resetup-required IconConfigure }
+ bind .i <<IconConfigure>> {
+ applet::subwindow-need-recreate
+ }
}
+#----- subprocess -----
+variable subproc none
+variable ratelimit {}
+
+proc setup-subproc {w border_colour border_width get_cmdline} {
+ variable subproc_get_cmdline $get_cmdline
+ setup-subwindow $w $border_colour $border_width \
+ applet::subproc-destroying applet::subproc-ready
+}
+
+proc subproc-destroying {} {
+ variable subproc
+ debug "DESTROYING $subproc"
+
+ catch { destroy .i.i.b.c }
+
+ switch -exact $subproc {
+ none { }
+ old { }
+ default { kill $subproc; set subproc old }
+ }
+}
+
+proc subproc-ready {} {
+ variable subproc
+ 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
+ }
+ default {
+ error "unexpected state $subproc"
+ }
+ }
+ debug "READY-done $subproc"
+}
+
+proc run-child {} {
+ variable subproc
+ variable ratelimit
+ variable subproc_get_cmdline
+
+ set id [winfo id .i.i.b.c]
+ set cmd [uplevel #0 [concat [list $subproc_get_cmdline] $id]]
+
+ 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} {
+ debug stderr "crashing repeatedly, quitting $ratelimit"
+ exit 127
+ }
+
+ set subproc none
+ set subproc [subproc::fork applet::child-died {
+ execl [lindex $cmd 0] [lrange $cmd 1 end]
+ }]
+ debug "FORKED $subproc"
+}
+
+proc child-died {how how2} {
+ debug "DIED $how $how2"
+ variable subproc
+ switch -exact $subproc {
+ old {
+ set subproc none
+ run-child
+ }
+ default {
+ set subproc none
+ subwindow-need-recreate
+ }
+ }
+}
-proc setimage {image} {
- .i configure -image $image
}
~ian / chiark-tcl-applet.git / blobdiff