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############################################################################
#
# File: scater.icn
#
# Subject: Program to display visualize string concatenation
#
# Author: Ralph E. Griswold
#
# Date: March 1, 1997
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# This program displays successive numbers by lines of corresponding
# height. When the display area is full, it scrolls from right to
# left.
#
# In this version, input is piped in.
#
############################################################################
#
# Requires: Version 9 graphics, MT Icon and instrumentation
#
############################################################################
#
# Links: evinit, interact, vsetup
#
############################################################################
link evinit
link interact
link vsetup
global vidgets
global root
global strip
global state
global gc_black
global reset
global scale
global width
global height
global window
$include "evdefs.icn"
procedure main(args)
init(args)
display()
end
procedure init(args)
EvInit(args) | stop("*** cannot load SP.")
/EventSource := &eventsource
variable("write", EventSource) := -1
variable("writes", EventSource) := -1
window := WOpen ! ui_atts()
vidgets := ui()
root := vidgets["root"]
state := &null
scale := 1
width := vidgets["strip"].uw
height := vidgets["strip"].uh
strip := Clone(window, "dx=" || vidgets["strip"].ux, "dy=" ||
vidgets["strip"].uy)
Clip(strip, 0, 0, width, height)
gc_black := Clone(strip, "fg=black")
end
procedure display()
static cat, cmask, rmask
initial {
cat := proc("||", 2)
cmask := cset(E_Ocall)
rmask := cset(E_Oret)
}
repeat {
while (*Pending() > 0) | \state do
ProcessEvent(root, , shortcuts)
EvGet(cmask) | exit()
if &eventvalue === cat then {
EvGet(rmask) | exit()
&eventvalue := *&eventvalue
&eventvalue *:= scale
&eventvalue >:= height # Motif bug avoidance
CopyArea(strip, 1, 0, width - 1, height, 0, 0)
EraseArea(strip, width - 1, 0, width, height)
DrawLine(gc_black, width - 1, height - &eventvalue, width - 1, height)
}
}
end
procedure file_cb(vidget, value)
case value[1] of {
"snapshot @S": return snapshot(strip, 0, 0, width, height)
"quit @Q": exit()
}
fail
end
procedure configure_cb(vidget, value)
case value[1] of {
"scale": {
repeat {
if TextDialog(, "scale", scale, 10) == "Okay" then {
scale := (0 < numeric(dialog_value[1])) | {
Notice("Invalid scale value.")
next
}
reset_cb()
return
}
else fail # user canceled
}
}
}
fail
end
procedure reset_cb()
EraseArea(strip)
return
end
procedure shortcuts(e)
if &meta then
case map(e) of {
"q": exit()
"s": return snapshot(strip, 0, 0, width, height)
}
else fail
end
#===<<vib:begin>>=== modify using vib; do not remove this marker line
procedure ui_atts()
return ["size=477,255", "bg=gray-white"]
end
procedure ui(win, cbk)
return vsetup(win, cbk,
[":Sizer:::0,0,477,255:",],
["configure:Menu:pull::36,0,71,21:Configure",configure_cb,
["scale"]],
["file:Menu:pull::0,1,36,21:File",file_cb,
["snapshot @S","quit @Q"]],
["line1:Line:::0,22,477,22:",],
["reset:Button:regular::11,76,42,20:reset",reset_cb],
["strip:Rect:grooved::63,37,400,200:",],
)
end
#===<<vib:end>>=== end of section maintained by vib
|
