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    Question select deselect checkbox in grid column header

    select deselect checkbox in grid column header


    it sound like a common problem , so forgive me but i am not able to solve this problem
    i have grid whos first column is checkbox colum having check box in header to select all rows,so what i want is to sync header checkbox with row checkboxes , i want to deselect header checkbox when on of row in grid deselected !

    thank you.

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    You can change the header checkbox of a CheckboxSelectionModel by using:
    Code:
    var setHeaderCheckbox: function(checked){
        grid.getView().mainHd.child('.x-grid3-hd-checker')[checked ? 'addClass' : 'removeClass']('x-grid3-hd-checker-on');
    };

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