I am working on an text-based application (no GUI involved) and am
wondering if there is a way to get character input back from the user but
replacing each displayed character as it is typed with a ‘*’ - e.g. to hide
a password being typed in.
I figured I could just do a getc, then putc the meta sequence for the
Delete character but it isn’t working at all…
Any ideas? I’d love some help and would greatly appreciate a quick example
that shows that this is possible.
Thanks in advance!
Andy
···
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Andrew Cowan wrote:
I am working on an text-based application (no GUI involved) and am
wondering if there is a way to get character input back from the user but
replacing each displayed character as it is typed with a ‘*’ - e.g. to hide
a password being typed in.
I figured I could just do a getc, then putc the meta sequence for the
Delete character but it isn’t working at all…
Any ideas? I’d love some help and would greatly appreciate a quick example
that shows that this is possible.
Hello,
on linux (and other unices) you will need to know terminal escape codes
or use some high level library such as
termcap or terminfo (it will tell you escape codes for particular terminal)
curses or ncurses (it will allow very simple windowing in terminal)
jttui (high level ruby bindings to ncurses library)
jttui password dialog example (just a quick hack):
···
require ‘jttui/jttui’
require ‘jttui/jttuistd’
JTTui.run do |root|
d=JTTDialog.new(root, ‘Dialog Window’, 0, 0, 30, 10,
‘Example 8 - password dialog’)
d.align=JTTWindow::ALIGN_CENTER
l=JTTWLabel.new(d, ‘Label 1’, 0, 0, 40, 1, ‘Enter password:’)
p=JTTWEditpass.new(d, ‘PWEdit 1’, 2, 2, 20, 1,‘’, true)
b=JTTWButton.new(d, ‘Quit button’, 2, 4, 6, 1, ‘_Quit’) {
JTTWMessagebox.new(“You have typed ‘#{p.editor.text}’”, 0, 0, ‘Ok’).execute
JTTui.addmessage nil, :close
}
[p,b].each{|x| d.addtabstop x}
d.defaultbutton=b
end
JTTui screenshots and download at
http://klokan.sh.cvut.cz/~jtra/
unstable version of Debian GNU/Linux contains JTTui as package
libjttui-ruby
Jakub Travnik,
jabber://jtra@jabber.com
Jakub, I have always considered curses to be a console-oriented windowing
system, can this be used through a socket connection, to create a window
remotely on a terminal connected via telnet to the ruby application (server) ?
Thanks!
Andy
···
On Saturday 28 September 2002 15:08, you wrote:
Andrew Cowan wrote:
I am working on an text-based application (no GUI involved) and am
wondering if there is a way to get character input back from the user but
replacing each displayed character as it is typed with a ‘*’ - e.g. to
hide a password being typed in.
I figured I could just do a getc, then putc the meta sequence for the
Delete character but it isn’t working at all…
Any ideas? I’d love some help and would greatly appreciate a quick
example that shows that this is possible.
Hello,
on linux (and other unices) you will need to know terminal escape codes
or use some high level library such as
termcap or terminfo (it will tell you escape codes for particular
terminal) curses or ncurses (it will allow very simple windowing in
terminal) jttui (high level ruby bindings to ncurses library)
jttui password dialog example (just a quick hack):
require ‘jttui/jttui’
require ‘jttui/jttuistd’
JTTui.run do |root|
d=JTTDialog.new(root, ‘Dialog Window’, 0, 0, 30, 10,
‘Example 8 - password dialog’)
d.align=JTTWindow::ALIGN_CENTER
l=JTTWLabel.new(d, ‘Label 1’, 0, 0, 40, 1, ‘Enter password:’)
p=JTTWEditpass.new(d, ‘PWEdit 1’, 2, 2, 20, 1,‘’, true)
b=JTTWButton.new(d, ‘Quit button’, 2, 4, 6, 1, ‘_Quit’) {
JTTWMessagebox.new(“You have typed ‘#{p.editor.text}’”, 0, 0,
‘Ok’).execute JTTui.addmessage nil, :close
}
[p,b].each{|x| d.addtabstop x}
d.defaultbutton=b
end
JTTui screenshots and download at
http://klokan.sh.cvut.cz/~jtra/
unstable version of Debian GNU/Linux contains JTTui as package
libjttui-ruby
Jakub Travnik,
jabber://jtra@jabber.com