How to refresh a graphical display through bash script
Hi folks ,
I need to display a message graphically using a messagebox or textbox through bash script. However the message should be keep changing every 4 secs . I input the message from a file and use "gxmessage" to display it .
Where "$random" is some random data from a file.
But the problem is , how should I refresh the same gxmessage message box,putting different message each time .
I thought of
Code:
while :
do
sleep 4
if ps | grep "gxmessage"
then
killall -9 "gxmessage"
fi
gxmessage -nofocus -center -title "Welcome screen" -geometry "600,600" -wrap -file $random &
done &
I hate this solution and it looks ugly too , because it is visible that the message box is getting killed and forked every time .
Can't I use the same gxmessage message box for all the messages just by putting new messages and hence refreshing the same box.
Any idea , anything other than gxmessage will do , if a solution is somewhere else.
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LEARN ABOUT MOJAVE
tk_messagebox
tk_messageBox(n) Tk Built-In Commands tk_messageBox(n)
__________________________________________________________________________________________________________________________________________________NAME
tk_messageBox - pops up a message window and waits for user response.
SYNOPSIS
tk_messageBox ?option value ...?
_________________________________________________________________DESCRIPTION
This procedure creates and displays a message window with an application-specified message, an icon and a set of buttons. Each of the but-
tons in the message window is identified by a unique symbolic name (see the -type options). After the message window is popped up, tk_mes-
sageBox waits for the user to select one of the buttons. Then it returns the symbolic name of the selected button.
The following option-value pairs are supported:
-default name
Name gives the symbolic name of the default button for this message window ( "ok", "cancel", and so on). See -type for a list of the
symbolic names. If this option is not specified, the first button in the dialog will be made the default.
-detail string
Specifies an auxiliary message to the main message given by the -message option. Where supported by the underlying OS, the message |
detail will be presented in a less emphasized font than the main message.
-icon iconImage
Specifies an icon to display. IconImage must be one of the following: error, info, question or warning. If this option is not speci-
fied, then the info icon will be displayed.
-message string
Specifies the message to display in this message box.
-parent window
Makes window the logical parent of the message box. The message box is displayed on top of its parent window.
-title titleString
Specifies a string to display as the title of the message box. The default value is an empty string.
-type predefinedType
Arranges for a predefined set of buttons to be displayed. The following values are possible for predefinedType:
abortretryignore Displays three buttons whose symbolic names are abort, retry and ignore.
ok Displays one button whose symbolic name is ok.
okcancel Displays two buttons whose symbolic names are ok and cancel.
retrycancel Displays two buttons whose symbolic names are retry and cancel.
yesno Displays two buttons whose symbolic names are yes and no.
yesnocancel Displays three buttons whose symbolic names are yes, no and cancel.
EXAMPLE
set answer [tk_messageBox -message "Really quit?"
-icon question -type yesno
-detail "Select "Yes" to make the application exit"]
switch -- $answer {
yes exit
no {tk_messageBox -message "I know you like this application!"
-type ok}
}
KEYWORDS
message box
Tk 4.2 tk_messageBox(n)
07-25-2011
