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This works and doesn't work.

Apparently, what happens is that as long as the macro is busy (or maybe it's just with functions 
that take a long time in comparison, like exporting a PDF), the Cancel button I made on the dialog 
does not get attention.  So if I click on it once, usually nothing happens.  But if I keep clicking 
on it, over and over, and I hit it when the interpreter has time to check the status of the button, 
then it works.

I'm trying to think of a way to get LO to check the button to see if there HAS BEEN an event, as 
opposed to checking to see if there IS an event, but I'm stumped.

So, other than the delay issue, this could work.



Hal

On Feb 24, 2013, at 9:32 AM, Andrew Douglas Pitonyak <andrew@pitonyak.org> wrote:


On 02/23/2013 03:24 AM, Hal Vaughan wrote:
I have a macro in LO BASIC that sets up a dialog, then, instead of executing it, I do:

oDialog.setVisible(TRUE)

This dialog box contains a progress bar and, while testing it, I realized it's frustrating for 
longer documents to have a progress bar and force me to sit and wait without a way to cancel it. 
 So I added a Cancel button.

This dialog is in my library and I'd like to find a way to set up the "Cancel" button so it can 
either stop the script or possibly even call a clean up routine when it's been pressed - or have 
it change the state of a global variable so a routine could see if it's been pressed.

I know there are event handlers so I can do something on events like MouseOver and so on.

And if I were not putting this in a library, I could easily specify, in the Dialog Settings, 
which routine to call on Cancel.

But if I want the dialog in a library, is there a way, when calling the function that sets it 
up, to specify a routine to call when the Cancel button is pressed?  Or is there some way to 
create a global variable or any kind of flag that I could have changed when the button is 
pressed?

In other words, other than putting in a "Stop" command, or specifying one routine name to call 
when an event triggers it, can I pass on the name or pointer to a routine that would be called 
when the button is pressed?


Hal
Disclaimer: I have never tried or considered what you desire to do, but..... I suppose that I 
would first test this (should be easy to do).

First, what is it that you are doing that you desire to interrupt? Specifically, is it your macro 
code that is running for a long time, or, did it make a call that is running for a long time? If 
it is your own macro, I would try setting a global in an event handler and check that global in 
your code. You could create a quick test


while the "cancel requested global is not true" and two minutes has not elapsed
do something like add zero to a variable

Print "I am out and finished"


Then, you can check to see if you can set the global variable by clicking on a cancel button and 
having the event handler be called. I am not optimistic that this will work, but, it is worth a 
try. I am very interested in your results.


-- 
Andrew Pitonyak
My Macro Document: http://www.pitonyak.org/AndrewMacro.odt
Info:  http://www.pitonyak.org/oo.php


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