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Re: [rap-dev] Re: PropertySheetEntries Sorting Order? 
Hi Alexey,
really nice to hear what you're doing here. Sounds very promising. What I don't understand is your "sorting problem". The tree itself does not have any sorting mechanism (neither in SWT nor in RWT). So I really wonder what's the problem here. I imagine you're using the getBounds method of the TreeItem to determinate the location where you place your celleditors. One known issue there is that the y coordinate is relative to the tree widget itself and not it's client area. In turn this means that you need to add the header spacing to the y coordinate (Tree#getHeaderHeight). If you can show us some sample code to reproduce the error I'm very interested to help!
Just a sentence about the tree itself: The java fascade which provides the API is org.eclipse.swt.widgets.Tree. This manages the treeitems and stuff. In the rendering phase, the TreeLCA class helps to synchronize the server and client state and the same applies to TreeItemLCA. On the client side, the Tree.js / TreeItem.js are only wrappers around the original qooxdoo implementations to enhance them with stuff like tree headers and proper column handling. 

I'm looking forward to see some of your stuff regarding cell editors!

Greets
 Benny

Alexey Litvinuke wrote:

Hi Everyone!
I've finally introduced sorting of TreeItems in Tree's in order to temporary resolve this problem as I asked about in my previous message. To get TreeItems sorted by label (text) you need to add code for sorting inside TreeItem.js in setTexts() function. This is because you need texts set before sorting by them. Hence I do sorting of this newly created TreeItem and all its siblings and then apply sorted array of items to their parent.
This is kind of hack to get done what I need here. And what would be great is to have some mechanism of sorting tree items inside of Tree itself as part of API. Thus we can predict in which order items are placed in tree and work with it.
I am very concerned to help with tree items sorting and celleditors (especially for trees) and can contribute some of the code I have here to RAP project. Its very imprortant to me (and to others too, I am sure) to have those things included in very close future releases of RAP. And this way I don't need to re-merge my changes with new releases of RAP anymore ;) 

Thank you,
Alex.


On Dec 26, 2007 1:23 PM, Alexey wrote:

    Hi!

    I've faced with a problem of sorting order of PropertySheetEntries
    in PropertySheet (EMF implementation with Tree object as a Viewer
    control).

    I am implementing CellEditors and they work fine for me in whole.
    The ploblem is that I can't control and get the correct order of
    entries which will occure in PropertySheet.
    I need the order of entries to get index of selected element in
    tree (2 column tree) to know where to place my cell editor.
    Because of my PropertySheetViewer control is Tree - I can't just
    get selected index but only selected object.

    In most cases order of how entries are displayed by RAP in HTML is
    equal to what we have in Java in
    "selectedPropertySheetEntry.getChildEntries()".
    But in some cases they don't and only for some elements - and this
    finaly result with incorrect cell editor placement when I am
    activating it for selected item.

    Here is an screenshot of what I am talking about:

    http://img205.imageshack.us/my.php?image=propertysheetexamplebz1.gif
    <http://img205.imageshack.us/my.php?image=propertysheetexamplebz1.gif>

    You can see that in this particular case when I try to edit one
    property - it opens correct celleditor but in not correct location
    - because of the differences in order of element I have in Java
    code (selectedPropertySheetEntry.getChildEntries ()) and the way
    RAP renders them in HTML.

    Can you suggest something how to avoid this problem?
    Any links to source code where and how RAP makes this sorting and
    why it is different from what I see in Java?

    Thank you in advance.



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