Hello !
I did not find any config option to add some tooltips over the TriggerField's triggers 
So I had to override the getTriggerMarkup function as follows :
Code:
Ext.define('Ext.override.form.field.Trigger', {
override: 'Ext.form.field.Trigger',
getTriggerMarkup: function() {
var me = this,
i = 0,
hideTrigger = (me.readOnly || me.hideTrigger),
triggerCls,
triggerTip,
triggerBaseCls = me.triggerBaseCls,
triggerConfigs = [];
// TODO this trigger<n>Cls API design doesn't feel clean, especially where it butts up against the
// single triggerCls config. Should rethink this, perhaps something more structured like a list of
// trigger config objects that hold cls, handler, etc.
// triggerCls is a synonym for trigger1Cls, so copy it.
if (!me.trigger1Cls) {
me.trigger1Cls = me.triggerCls;
}
if (!me.trigger1Tip) {
me.trigger1Tip = me.triggerTip;
}
// Create as many trigger elements as we have trigger<n>Cls configs, but always at least one
for (i = 0; (triggerCls = me['trigger' + (i + 1) + 'Cls']) || i < 1; i++) {
triggerTip = me['trigger' + (i + 1) + 'Tip'];
triggerConfigs.push({
tag: 'td',
valign: 'top',
cls: Ext.baseCSSPrefix + 'trigger-cell',
style: 'width:' + me.triggerWidth + (hideTrigger ? 'px;display:none' : 'px'),
cn: {
cls: [Ext.baseCSSPrefix + 'trigger-index-' + i, triggerBaseCls, triggerCls].join(' '),
'data-qtip': triggerTip,
role: 'button'
}
});
}
triggerConfigs[i - 1].cn.cls += ' ' + triggerBaseCls + '-last';
return Ext.DomHelper.markup(triggerConfigs);
}
});
Is it possible to add those triggernTip config options in the next Ext 4.1 release ?
Thanks !