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    Hi,

    I have a LiveGrid with about 500.000 rows or higher. If a user try select a large amount of rows I get a script error : "A script on this page may be busy or may not responded". The CPU on the client side is 100% busy.

    Is there a way to disable multiple row selection when a user try to select for instance more than 1000 rows?

    Thanks.

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    Quote Originally Posted by NicoP View Post
    Hi,

    I have a LiveGrid with about 500.000 rows or higher. If a user try select a large amount of rows I get a script error : "A script on this page may be busy or may not responded". The CPU on the client side is 100% busy.

    Is there a way to disable multiple row selection when a user try to select for instance more than 1000 rows?

    Thanks.
    1) What's the size of your buffer?
    2) What Ext version are you using?
    3) Did you try with firebug disabled?

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    Hi Mind,

    Quote Originally Posted by MindPatterns View Post
    1) What's the size of your buffer?
    Here my live grid parameters:
    buffer.size=60
    near.limit=10

    Quote Originally Posted by MindPatterns View Post
    2) What Ext version are you using?
    I am trying to do some tests under Ext2.2.1 and 3.0.0. The problems is here on the both releases.

    Quote Originally Posted by MindPatterns View Post
    3) Did you try with firebug disabled?
    Yes, the problem still remains. See attached screenshot of my demo grid page with 2 million rows.

    I can select about 20.000 rows max without errors (It takes approximatively 10seconds). The grid try to keep in memory all selected rows that is why the browser is busy.
    A solution will be to disable multi row selection if selection size is greater than for instance 1000 or 5000 rows. But I don't know if it is possible.
    Attached Images

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    Mind,

    Just for your information I also have disabled the show load mask when I use the vertical scrollbar : as my json flow is returned by the server side in about 60ms, the buffer refresh on screen is very quick and more user friendly. The load mask take too much time to be displayed.

    However I keep the load mask when I sort or filter the grid data especially if I have a lot of rows

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    I just checked the selection with appr. 45000 rows - now problem whatsoever so I still assume it has to deal with your hardware - I'm using a Win XP, FF3.5.3, Dual Core 2,4 with 3 Gb RAM - I notice some delay but no warnings from FF whatsoever.

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    Quote Originally Posted by MindPatterns View Post
    I just checked the selection with appr. 45000 rows - now problem whatsoever so I still assume it has to deal with your hardware - I'm using a Win XP, FF3.5.3, Dual Core 2,4 with 3 Gb RAM - I notice some delay but no warnings from FF whatsoever.
    Ok, for me Ubuntu + FF2 (I will try v3) + Pentium 4 2.8GHz + 3Gb RAM.

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    Quote Originally Posted by MindPatterns View Post
    I just checked the selection with appr. 45000 rows - now problem whatsoever so I still assume it has to deal with your hardware - I'm using a Win XP, FF3.5.3, Dual Core 2,4 with 3 Gb RAM - I notice some delay but no warnings from FF whatsoever.
    More the client computer is powerfull more you can select row.

    With an Intel Core2Quad CPU Q9400 @ 2.66GHz I can multi select until 175,000 rows.

    However I think the best solution will to disable the multi selection row when we try to select a large number of row.

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    That would be an option - I'm planning a kind of "view selection model" where only those rows can be selected which are currently in the view (or at least in the buffer) - that should help (if your buffersize doesn't tend to be ~ 50000 )

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    Quote Originally Posted by MindPatterns View Post
    That would be an option - I'm planning a kind of "view selection model" where only those rows can be selected which are currently in the view (or at least in the buffer) - that should help (if your buffersize doesn't tend to be ~ 50000 )
    yes
    As my servlet (i.e server side) is optimized, I always use small buffer: lower than 100 rows

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    So, I have done a quick fix to solve this problem by adding a test in selectRange function rowSelectionModel object:

    Code:
    selectRange : function(startRow, endRow, keepExisting) {
            if (this.locked) {
                return;
            }
    
            if (!keepExisting) {
                this.clearSelections();
            }
    
            var totalSelected = Math.abs(endRow-startRow);
            if(this.maxSelectedRow && totalSelected>this.maxSelectedRow) {
          this.clearSelections();
          this.displayMaxSelectedRow(this.maxSelectedRow);          
          return;
        }
            
            if (startRow <= endRow) {
                for (var i = startRow; i <= endRow; i++) {
                    this.selectRow(i, true);
                }
            } else {
                for (var i = startRow; i >= endRow; i--) {
                    this.selectRow(i, true);
                }
            }
        }

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