New useful store functions

Some useful additional store functions 

• getEncodedData
• setAll
• getBetween
• min
• max

Install as follows

Ext.override(Ext.data.Store, { 
getEncodedData: function (modifiedOnly){ 
if(modifiedOnly === true) { 
c = this.getModifiedRecords(); 
} else { 
c = this.getRange(); 
} 
var p = new Array(); 
if(c.length){ 
for(i=0; i<c.length; i++) { 
p[i] = c[i].data; 
} 
return Ext.encode(p); 
} else { 
return ''; 
} 
}, 
setAll: function(f,v){ 
this.each(function(r){ 
r.set(f,v); 
}) 
}, 
getBetween: function(value, lower, upper){ 
var rc; 
this.each(function(r){ 
var d = r.data; 
if(value >= (1 * d[lower]) && value <= (1 * d[upper])) { 
rc = r; 
return false; 
} 
}); 
return rc; 
}, 
max : function(property,start,end){ 
var rs = this.data.items, v = 0; 
start = start || 0; 
end = (end || end === 0) ? end : rs.length-1; 
for(var i = start; i <= end; i++){ 
v = Math.max(v, (1 * rs[i].data[property]) || 0); 
} 
return v; 
}, 
min : function(property,start,end){ 
var rs = this.data.items, v = 0; 
start = start || 0; 
end = (end || end === 0) ? end : rs.length-1; 
for(var i = start; i <= end; i++){ 
v = Math.min(v, (1 * rs[i].data[property]) || 0); 
} 
return v; 
} 
})

Usage:

getEncodedData

Returns string encoded data suitable for submission in Ajax request. 

Parameters:

• modifiedOnly - if true only returns modified records

getBetween

Returns array of records where value between lower and upper

Parameters:

• value: the field to search in
• lower: lower bound
• upper: upper bound

max

Returns maximum value for field property between records start and end

Parameters:

• property: field value to return max from
• start: start index of records to search (default 0)
• end: end index of records to search (default store.getCount()) 

setAll

Sets value of field f to value v for all records in the store

Parameters:

• f: field to update
• v: value to set field to