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############################################################################
#
# File: winsnap.icn
#
# Subject: Procedure to take snapshot of a portion of a window
#
# Author: Ralph E. Griswold
#
# Date: May 2, 2001
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# This procedure writes an image file for a specified portion of a
# window. The name for the file is requested from the user via a
# dialog box. If there already is a file by the specified name, the
# user is given the option of overwriting it or selecting another
# name. The procedure fails if the user cancels.
#
############################################################################
#
# Requires: Version 9 graphics
#
############################################################################
#
# Links: graphics
#
############################################################################
link graphics
procedure winsnap(win, x, y, w, h)
local name, f
if type(win) ~== "window" then {
win :=: x :=: y :=: w :=: h
win := \&window | runerr(140, &window)
}
repeat {
if OpenDialog("Image file name") == "Okay" then {
name := dialog_value
if f := open(name) then {
close(f)
if Dialog("Overwrite existing file?", , , ,
["Okay", "Cancel"]) == "Cancel" then next
}
WriteImage(win, name, x, y, w, h) | {
Notice("Cannot write image")
fail
}
return
}
else fail
}
return
end
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