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Thread: Extjs Locked Grid Mouse wheel scrolling issue

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  1. #1
    Sencha User
    Join Date
    Oct 2015

    Default Extjs Locked Grid Mouse wheel scrolling issue

    Can anyone help why mouse wheel scrolling very slow in both Firefox and Chrome.
    In Internet Explorer its working fine

  2. #2


    I've the same problem... can see the difference putting the mouse over between the locked and unlocked columns.

    Someone know the solution?

  3. #3


    At the 4.1.0 doesn't happen, but after 4.1.1 can simulates the problem... I tried to debug, but I hadn't found any function that uses to scroll...

    4.1.1 - This version can simulates the problem

    4.1.0 - This version haven't the problem

  4. #4


    Fixed the problem, I've override two functions at Ext.grid.locking.Lockable follow the code(I saw that the problem happens when one grid will sync with other get in loop):

     * Override for {@link Ext.grid.locking.Lockable}. Fixes the mousewheel problem.
    Ext.define('Gvdasa.overrides.grid.locking.Lockable', {
        override: 'Ext.grid.locking.Lockable',
        onNormalViewScroll: function () {
            var me = this,
                lockedView = me.lockedGrid.getView();
            delete lockedView.scrolledByNormal; // remove always the flag when started the scroll by unlocked grid.
        onLockedViewScroll: function () {
            var me = this,
                lockedView = me.lockedGrid.getView();
            if (!lockedView.scrolledByNormal) { // just the unlocked view will remove this flag.
                lockedView.scrolledByNormal = true;
                return false;

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