javascript - ExtJS 3 grid columnresize or tools handler -


i working extjs 3.4, want add tools on grid when 1 of grid's column moved or resized. , after want add handler dynamically created tools. if not possible, want handle tools handler dynamically on columnresize.

my code below:

var grid = new ext.grid.gridpanel({     title       : _title,     autoheight  : true,     collapsible : true,     colmodel    : _mycolmodel,     store       : _mystore,     tools:[{         type        :   'plus',         hidden      :   false,         handler     :   function(event, toolel, panel){             //         }     }] });  grid.on('columnresize', function(argcolindex, argnewwidth){     // });


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