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############################################################################
#
# File: vquery.icn
#
# Subject: Procedures for window queries
#
# Author: Jon Lipp
#
# Date: May 2, 2001
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# Utility procedures in this file: Vchoice(), Vinput()
#
############################################################################
#
# Requires: Version 9 graphics
#
############################################################################
#
# Links: vidgets, vbuttons, vtext
#
############################################################################
link vidgets
link vbuttons
link vtext
procedure Vchoice(str, buttons[])
local win, root, t, u, w, b, i, x, y, rv
local button_pos, def_button, old, event
static wpad, hwpad
static temp, PAD, WINX, WINY
initial {
temp := open("vchoice", "g", "canvas=hidden")
PAD := integer(WAttrib(temp, "fheight") + 10)
WINX := integer(WAttrib(temp, "displaywidth") / 2)
WINY := integer(WAttrib(temp, "displayheight") / 2)
wpad := 30
hwpad := wpad/2
}
if *buttons = 0 then buttons := [" Yes ", " No "]
t := TextWidth(temp, str)
u := 0
every b := !buttons do
u +:= TextWidth(temp, \b) + 13
w := ((u > t, u) | t) + wpad
win := vquery_open_window("choose", WINX-w/2, WINY-PAD, w, 2*PAD+wpad)
root := Vroot_frame(win)
VResize(root)
Vmessage(root, hwpad + (w-wpad-t)/2, hwpad, win, str)
x := hwpad + (w-wpad-u)/2; y := -hwpad
button_pos := table()
every i := 1 to *buttons do {
t := Vbutton(root, x, y, win, buttons[i], , i)
x +:= t.aw+5
button_pos[i] := xywh_rec(t.ax-2, t.ay-2, t.aw+4, t.ah+4)
}
VDraw(root)
def_button := 1
old := button_pos[def_button]
DrawRectangle(win, old.x, old.y, old.w, old.h)
repeat {
rv := &null
case event := Event(win) of {
-10: next
"\r": {
rv := def_button
break
}
"\t" : {
WAttrib(win, "drawop=reverse")
DrawRectangle(win, old.x, old.y, old.w, old.h)
def_button +:= 1
def_button := (def_button > *buttons, 1)
old := button_pos[def_button]
WAttrib(win, "drawop=copy")
DrawRectangle(win, old.x, old.y, old.w, old.h)
}
default : {
rv := VEvent(root, event, &x, &y)
(\rv, break)
}
} # end case
}
close(win)
return rv
end
record xywh_rec(x, y, w, h)
procedure Vinput(str, def_value)
local win, root, t, u, w, b, i, x, y, rv
local buttons, v, input_vidget, ok, cancel
local button_pos, def_button, old, lrv, event
static temp, PAD, WINX, WINY, FW, VTEXT_W
static wpad, hwpad, ID_OK, ID_CANCEL
initial {
temp := WOpen("canvas=hidden")
PAD := integer(WAttrib(temp, "fheight") + 10)
WINX := integer(WAttrib(temp, "displaywidth") / 2)
WINY := integer(WAttrib(temp, "displayheight") / 2)
FW := integer(WAttrib(temp, "fwidth"))
wpad := 30
hwpad := wpad/2
ID_OK := -11
ID_CANCEL := -12
VTEXT_W := 20
}
/str := ""
/def_value := ""
buttons := [" Ok ", "Cancel"]
v := FW * VTEXT_W + 8
t := TextWidth(temp, str)
u := 0
every b := !buttons do
u +:= TextWidth(temp, b) + 13
w := vquery_maximum(t, u, v) + wpad
win := vquery_open_window("choose", WINX-w/2, WINY-PAD, w, 3*PAD+wpad)
root := Vroot_frame(win)
VResize(root)
t := Vmessage(root, hwpad + (w-wpad-t)/2, hwpad, win, str)
input_vidget := Vtext(root, hwpad+(w-wpad-v)/2, hwpad+t.ah+5, win, "\\="||def_value , , , VTEXT_W)
x := hwpad + (w-wpad-u)/2; y := -hwpad
ok := Vbutton(root, x, y, win, buttons[1], , ID_OK)
x +:= ok.aw+5
cancel := Vbutton(root, x, y, win, buttons[2], , ID_CANCEL)
button_pos := table()
button_pos[ID_OK] := xywh_rec(ok.ax-2, ok.ay-2, ok.aw+4, ok.ah+4)
button_pos[ID_CANCEL] := xywh_rec(cancel.ax-2, cancel.ay-2, cancel.aw+4, cancel.ah+4)
VDraw(root)
def_button := ID_OK
old := button_pos[def_button]
DrawRectangle(win, old.x, old.y, old.w, old.h)
repeat {
lrv := rv := &null
case event := Event(win) of {
-10 : next
"\r" : {
rv := def_button
break
}
"\t": {
WAttrib(win, "drawop=reverse")
DrawRectangle(win, old.x, old.y, old.w, old.h)
def_button := (def_button = ID_OK, ID_CANCEL) | ID_OK
old := button_pos[def_button]
WAttrib(win, "drawop=copy")
DrawRectangle(win, old.x, old.y, old.w, old.h)
}
default: {
lrv := root.V.lookup(root, &x, &y)
/lrv := input_vidget
rv := (lrv).V.event(lrv, event, &x, &y)
if rv === (ID_OK | ID_CANCEL) then break
}
} # end case
}
close(win)
return (rv = ID_OK, input_vidget.data) | &null
end
procedure vquery_maximum(l[])
return sort(l)[-1]
end
procedure vquery_open_window(title, x, y, w, h)
local win
/x := 50; /y := 50; /w := 400; /h := 400
win := open(title, "g", "pos="||x||","||y, "width="||w, "height="||h) |
_Vbomb("couldn't open window")
return win
end
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