Shoutbox

I have trouble with this before, but for some reason this doesn't seem to clear the whole list, it always seems to leave the last item if there are more than 2-3 items in the list... Any idea why? It looks Ok to me and I've tried looping it more times, but it doesn't work

code:

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for(var i=0; i<=PlusWnd.LstView_GetCount("ListView");i++){
    PlusWnd.LstView_RemoveItem("ListView", 0);
}

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Try this instead!

code:

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//ListView_DeleteAll - Deletes all items
//Parameters: hWnd = control handle
function ListView_DeleteAll(hWnd) {
   var LVM_FIRST = 0x1000;
   var LVM_DELETEALLITEMS = (LVM_FIRST + 9);

   return new Boolean(Interop.Call("user32", "SendMessageW", hWnd, LVM_DELETEALLITEMS, 0, 0));
}

//Example
ListView_DeleteAll(PlusWnd.GetControlHandle("ListView"));

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Or you could use a while(PlusWnd.LstView_GetCount("ListView")) loop which would probably work as well. But I suppose Mattike's method is better

EDIT: Also your current method is looping 1 more time than is necessary as LstView_GetCount gives you the number of items in the listview, not the highest index - have you checked your Script Debugging Window?

quote:

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Originally posted by Mattike
Try this instead!

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That causes an error and so doesn't work

quote:

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Originally posted by Volv
Or you could use a while(PlusWnd.LstView_GetCount("ListView")) loop

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That just isn't removing any items

quote:

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Originally posted by Volv
EDIT: Also your current method is looping 1 more time than is necessary - have you checked your Script Debugging Window?

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I was tracing the LstView_Count property and it never got down to zero... it would just keep looping at 1

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EDIT: fixed a spelling mistake in Mattike's.... Now it does the same thing as Volv's... Lol.

I believe your original problem is related to the fact that PlusWnd.LstView_GetCount("ListView") is not constant (it decreases each time you remove an item) and as such your 'i' isn't going through all the necessary loops.
It works for 1 item because it loops through '0'.
It works for 2 items because it loops through '0', '1'.
It does not work for 3 items because it loops through '0', '1'.
It does not work for 4 items because it loops through '0', '1', '2'.
etc.

EDIT: I don't see why my while() loops wouldn't work though (I haven't tried it though)

I did manage to do it once before...

@Volv: The loop always removes index 0 so it should always remove the top one in the list... there should ALWAYS be a top item in the list

I think we should have a function to clear LstViews and Combos in the next version

It should be

code:

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while(PlusWnd.LstView_GetCount("ListView") != 0)

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This will give a boolean expression like the while statement wants

This method I have found works well, I have used it before with Message Customizer! Live when I did the groups to clear out the list views. However, seeing as though Mattike uses windows API it might be quicker and nicer to use that (especially on larger lists).

quote:

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Originally posted by markee

code:

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while(PlusWnd.LstView_GetCount("ListView") != 0)

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I did try that too... I might give it another go though

quote:

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Originally posted by markee
It should be

code:

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while(PlusWnd.LstView_GetCount("ListView") != 0)

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This will give a boolean expression like the while statement wants

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code:

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while(PlusWnd.LstView_GetCount("ListView") > 0)

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Hmph, > owns !=

quote:

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Originally posted by SpunkyLoveMuff
I did try that too... I might give it another go though

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You should have something like this:

code:

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while(PlusWnd.LstView_GetCount("ListView") > 0){
    PlusWnd.LstView_RemoveItem("ListView", 0);
}

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It doesn't matter if you use > or != in this situation because there is no time when it won't return a number equal to or greater than zero.  This is because the only error is if the plus window does not exist or the control ID doesn't exist.  As far as I can tell wouldn't it be quickest to do !== rather than the other 2?