ipcBeginProcess "wish": Tk GUI doesn't accept <ButtonPress>

[Kevin Bercaw]

I am launching wish from Virtuoso. There is some kind of blocking that is happening.

Symptoms:
I cannot interact with any widgets, i.e. I can't press a button but...
I can interact with the window, i.e. I can resize it and the window gets refreshed. Also I can insert text on a text widget and update entry widget (programatically only - all UI interaction beside window resizing is dead).

Here's a test script:
button .b -text "Exit" -command exit
pack .b

In a more complex test script I was able to send Tcl commands from Virtuoso (Virtuoso sending on stdout, Tcl reading stdin), and eval this command to trigger sending a command back to Virtuoso (Tcl sending stdout, Virtuoso reading stdin). So the wish application is not hung! But I still can't interact with any widgets I put up on the GUI.

I presume that the problem is that the Tcl event handler is busy but I don't understand why. I don't believe it's due to a blocking read of stdin as my fileevent callback is only called once when I send stdout from Virtuoso. (Also I configured stdin for non-blocking read).

If anybody has any ideas please send them along, thanks much!

 

[Kevin Bercaw]

On Wednesday, September 18, 2013 9:21:32 AM UTC-4, Kevin Bercaw wrote:

I am launching wish from Virtuoso. There is some kind of blocking that is happening.



Symptoms:

I cannot interact with any widgets, i.e. I can't press a button but...

I can interact with the window, i.e. I can resize it and the window gets refreshed. Also I can insert text on a text widget and update entry widget (programatically only - all UI interaction beside window resizing is dead)..



Here's a test script:

button .b -text "Exit" -command exit

pack .b



In a more complex test script I was able to send Tcl commands from Virtuoso (Virtuoso sending on stdout, Tcl reading stdin), and eval this command to trigger sending a command back to Virtuoso (Tcl sending stdout, Virtuoso reading stdin). So the wish application is not hung! But I still can't interact with any widgets I put up on the GUI.



I presume that the problem is that the Tcl event handler is busy but I don't understand why. I don't believe it's due to a blocking read of stdin as my fileevent callback is only called once when I send stdout from Virtuoso. (Also I configured stdin for non-blocking read).



If anybody has any ideas please send them along, thanks much!

I found the problem:
Application initialization failed: Can't find a usable tk.tcl in the following directories:
/pkg/qct/software/cadence/ic614_isr11/tools/dfII/etc/tcl8.4/tk8.4 /pkg/qct/software/cadence/ic614_isr11/tools/dfII/etc/tk8.4 /usr/lib/tk8.4 /usr/lib64/tk8.4 /lib/tk8.4 /usr/library /library /tk8.4.12/library

This probably means that tk wasn't installed properly.


So strange that the wish UI came up and the app was functional rather then just not starting at all!