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############################################################################
#
# File: vstyle.icn
#
# Subject: Procedures for drawing buttons
#
# Authors: Jon Lipp and Gregg M. Townsend
#
# Date: August 14, 1996
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# Utility procedures in this file:
# Vset_style()
#
############################################################################
link imscolor
procedure Vset_style (vid, style)
style := integer(style) | case style of {
&null: V_RECT
"regular": V_RECT
"regularno": V_RECT_NO
"check": V_CHECK
"checkno": V_CHECK_NO
"circle": V_CIRCLE
"circleno": V_CIRCLE_NO
"diamond": V_DIAMOND
"diamondno": V_DIAMOND_NO
"xbox": V_XBOX
"xboxno": V_XBOX_NO
"image": V_IMAGE
"imageno": V_IMAGE_NO
default: _Vbomb("invalid style parameter")
}
vid.style := style
case style of {
V_RECT :
vid.D := Vstd_draw(draw_off_rect, draw_on_rect, init_rect)
V_CHECK :
vid.D := Vstd_draw(draw_off_check, draw_on_check, init_check)
V_CIRCLE :
vid.D := Vstd_draw(draw_off_circle, draw_on_circle, init_circle)
V_DIAMOND:
vid.D := Vstd_draw(draw_off_diamond, draw_on_diamond, init_diamond)
V_XBOX :
vid.D := Vstd_draw(draw_off_xbox, draw_on_xbox, init_xbox)
V_IMAGE :
vid.D := Vstd_draw(draw_off_image, draw_on_image, init_image)
V_RECT_NO : {
vid.D := Vstd_draw(draw_off_rect, draw_on_rect, init_rect)
vid.D.outline := 1
}
V_CHECK_NO : {
vid.D := Vstd_draw(draw_off_check, draw_on_check, init_check)
vid.D.outline := 1
}
V_CIRCLE_NO : {
vid.D := Vstd_draw(draw_off_circle, draw_on_circle, init_circle)
vid.D.outline := 1
}
V_DIAMOND_NO: {
vid.D := Vstd_draw(draw_off_diamond, draw_on_diamond, init_diamond)
vid.D.outline := 1
}
V_XBOX_NO : {
vid.D := Vstd_draw(draw_off_xbox, draw_on_xbox, init_xbox)
vid.D.outline := 1
}
V_IMAGE_NO : {
vid.D := Vstd_draw(draw_off_image, draw_on_image, init_image)
vid.D.outline := 1
}
default: _Vbomb("invalid style parameter")
}
end
procedure init_xbox(s)
# nothing to do
end
procedure draw_off_xbox(s)
if /s.D.outline then {
EraseArea(s.win, s.ax + 2, s.ay + 2, s.aw - 4, s.ah - 4)
BevelRectangle(s.win, s.ax, s.ay, s.aw, s.ah, 2)
}
else
EraseArea(s.win, s.ax, s.ay, s.aw, s.ah)
end
procedure draw_on_xbox(s)
WAttrib(s.win, "linewidth=2")
DrawSegment(s.win, s.ax + 4, s.ay + 4, s.ax + s.aw - 4, s.ay + s.ah - 4,
s.ax + s.aw - 4, s.ay + 4, s.ax + 4, s.ay + s.ah - 4)
WAttrib(s.win, "linewidth=1")
if /s.D.outline then
BevelRectangle(s.win, s.ax, s.ay, s.aw, s.ah, -2)
end
procedure init_rect(s)
local TW, FH, ascent, descent
/s.s := ""
TW := TextWidth(s.win, s.s)
ascent := WAttrib(s.win, "ascent")
descent := WAttrib(s.win, "descent")
FH := ascent + descent
/s.aw := TW + 8
/s.ah := FH + 8
s.aw := 0 < s.aw | 1
s.ah := 0 < s.ah | 1
s.D.basex := (s.aw - TW - 1) / 2
s.D.basey := (s.ah - FH) / 2 + ascent
end
procedure draw_off_rect(s)
EraseArea(s.win, s.ax, s.ay, s.aw, s.ah)
GotoXY(s.win, s.ax+s.D.basex, s.ay+s.D.basey)
writes(s.win, s.s)
if /s.D.outline then
BevelRectangle(s.win, s.ax, s.ay, s.aw, s.ah, 2)
end
procedure draw_on_rect(s)
FillRectangle(s.win, s.ax, s.ay, s.aw, s.ah)
WAttrib(s.win, "reverse=on")
GotoXY(s.win, s.ax+s.D.basex, s.ay+s.D.basey)
writes(s.win, s.s)
WAttrib(s.win, "reverse=off")
if /s.D.outline then
BevelRectangle(s.win, s.ax, s.ay, s.aw, s.ah, -2)
end
procedure init_check(s)
local FH, ascent, descent
/s.s := ""
s.D.space := 4
ascent := WAttrib(s.win, "ascent")
descent := WAttrib(s.win, "descent")
FH := ascent + descent
/s.ah := FH + 8
/s.aw := TextWidth(s.win, s.s) + FH + 3*s.D.space
s.aw := 0 < s.aw | 1
s.ah := 0 < s.ah | 1
s.D.basex := FH + 2*s.D.space
s.D.basey := (s.ah - FH)/2 + ascent
s.D.CS := FH
s.D.CP := (s.ah-s.D.CS)/2
end
procedure draw_off_check(s)
local sp, cp, cs, ax, ay
sp := s.D.space; cp := s.D.CP; cs := s.D.CS
ax := s.ax; ay := s.ay
BevelRectangle(s.win, ax+sp, ay+cp, cs, cs, 2)
EraseArea(s.win, ax+sp+2, ay+cp+2, cs-4, cs-4)
GotoXY(s.win, ax+s.D.basex, ay+s.D.basey)
writes(s.win, s.s)
if /s.D.outline then
GrooveRectangle(s.win, s.ax, s.ay, s.aw, s.ah)
end
procedure draw_on_check(s)
local sp, cs, cp, ax, ay
sp := s.D.space; cp := s.D.CP; cs := s.D.CS
ax := s.ax; ay := s.ay
BevelRectangle(s.win, ax+sp, ay+cp, cs, cs, -2)
FillRectangle(s.win, ax+sp+2, ay+cp+2, cs-4, cs-4)
GotoXY(s.win, ax+s.D.basex, ay+s.D.basey)
writes(s.win, s.s)
if /s.D.outline then
GrooveRectangle(s.win, s.ax, s.ay, s.aw, s.ah)
end
procedure init_circle(s)
local FH, ascent, descent
/s.s := ""
s.D.space := 4
ascent := WAttrib(s.win, "ascent")
descent := WAttrib(s.win, "descent")
FH := ascent + descent
/s.ah := FH + 8
/s.aw := TextWidth(s.win, s.s) + FH + 3*s.D.space
s.aw := 0 < s.aw | 1
s.ah := 0 < s.ah | 1
s.D.basex := FH + 2*s.D.space
s.D.basey := (s.ah -FH)/2 + ascent
s.D.CS := FH + 1
s.D.CP := (s.ah-s.D.CS)/2
end
procedure draw_off_circle(s)
local da, ax, ay, r
da := s.D
r := da.CS / 2 - 1
ax := s.ax
ay := s.ay
EraseArea(s.win, ax+da.space, ay+da.CP, da.CS, da.CS)
BevelCircle(s.win, ax+da.space+r, ay+da.CP+r, r, 2)
GotoXY(s.win, ax+da.basex, ay+da.basey)
writes(s.win, s.s)
if /da.outline then
GrooveRectangle(s.win, s.ax, s.ay, s.aw, s.ah)
end
procedure draw_on_circle(s)
local da, ax, ay, r
da := s.D
da := s.D
r := da.CS / 2 - 1
ax := s.ax
ay := s.ay
FillCircle(s.win, ax+da.space+r, ay+da.CP+r, r - 1)
BevelCircle(s.win, ax+da.space+r, ay+da.CP+r, r, -2)
GotoXY(s.win, ax+da.basex, ay+da.basey)
writes(s.win, s.s)
if /da.outline then
GrooveRectangle(s.win, s.ax, s.ay, s.aw, s.ah)
end
procedure init_diamond(s)
local FH, ascent, descent
/s.s := ""
s.D.space := 4
ascent := WAttrib(s.win, "ascent")
descent := WAttrib(s.win, "descent")
FH := ascent + descent
/s.ah := FH + 8
/s.aw := TextWidth(s.win, s.s) + FH + 3*s.D.space
s.aw := 0 < s.aw | 1
s.ah := 0 < s.ah | 1
s.D.basex := FH + 2*s.D.space
s.D.basey := (s.ah - FH)/2 + ascent
s.D.CS := FH + 1
s.D.CP := (s.ah-s.D.CS)/2
end
procedure draw_off_diamond(s)
local sp, cp, cs, ax, ay, r
sp := s.D.space; cp := s.D.CP; cs := s.D.CS
ax := s.ax; ay := s.ay
r := cs / 2
EraseArea(s.win, ax+sp, ay+cp, cs, cs)
BevelDiamond(s.win, ax+sp+r, ay+cp+r, r, 2)
GotoXY(s.win, ax+s.D.basex, ay+s.D.basey)
writes(s.win, s.s)
if /s.D.outline then
GrooveRectangle(s.win, s.ax, s.ay, s.aw, s.ah)
end
procedure draw_on_diamond(s)
local sp, cs, cp, ax, ay, r
sp := s.D.space; cp := s.D.CP; cs := s.D.CS
ax := s.ax; ay := s.ay
r := cs / 2
BevelDiamond(s.win, ax+sp+r, ay+cp+r, r, -2)
FillDiamond(s.win, ax+sp+r, ay+cp+r, r - 2)
GotoXY(s.win, ax+s.D.basex, ay+s.D.basey)
writes(s.win, s.s)
if /s.D.outline then
GrooveRectangle(s.win, s.ax, s.ay, s.aw, s.ah)
end
# undocumented image button code from Lorne Foss & Clint Jeffery, UTSA
#
# If type = V_IMAGE | V_IMAGE_NO, button string is used as image source.
# If it contains a comma, it's a DrawImage string.
# If not, it's the name of a GIF file in the current directory.
# Size is determined by the GIF or DrawImage image.
procedure init_image(s)
local imagefile
imagefile := s.s
if string(s.s) then {
if not find(",", s.s) then {
s.s := WOpen("canvas=hidden","image="||imagefile) |
_Vbomb("can't initialize button image from file " || s.s)
s.aw := WAttrib(s.s,"width")
s.ah := WAttrib(s.s,"height")
}
else {
s.aw := imswidth(s.s)
s.ah := imsheight(s.s)
if /s.aw | /s.ah then
_Vbomb("illegal DrawImage string for button")
}
if /s.D.outline then {
s.aw +:= 4
s.ah +:= 4
}
}
end
procedure draw_on_image(s)
draw_image_helper(s, -2, FillRectangle)
end
procedure draw_off_image(s)
draw_image_helper(s, 2, EraseArea)
end
procedure draw_image_helper(s, bevel, bgproc)
local b
static type
initial type := proc("type", 0) # protect attractive name
if /s.D.outline then {
BevelRectangle(s.win, s.ax, s.ay, s.aw, s.ah, bevel)
b := abs(bevel)
}
else
b := 0
if type(s.s) == "window" then
CopyArea(s.s, s.win, 0, 0, s.aw, s.ah, s.ax + b, s.ay + b)
else {
bgproc(s.win, s.ax + b, s.ay + b, s.aw - 2 * b, s.ah - 2 * b)
DrawImage(s.win, s.ax + b, s.ay + b, s.s)
}
end
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