Custom grid renderers with CFGRID (2)

This post is more than 2 years old.

Almost three years ago I wrote a blog entry on doing custom grid renderers with CFGRID and the Ext grid for ColdFusion 8. This week a reader and I went back and forth in the comments concerning how to build a renderer that would modify a column but check other column values for the logic. So for example, in that previous blog entry my logic for a custom product column was to check to see if the product was "Product 4". What if I wanted to check the price for example? Here is an updated version that works with ColdFusion 9 and does just that.

<cfajaximport/> <html>

<head> <script>

myf = function(data,cellmd,record,row,col,store) { console.dir(; //old logic, prod 4 only //if(data == "Product 4") return "<b style='color:red'>" + data + "</b>"; //new logic, price > 50 and type is weapon if( == 'weapon' && > 50) return "<b style='color:red'>" + data + "</b>"; else return data; } testgrid = function() { mygrid = ColdFusion.Grid.getGridObject('data'); cm = mygrid.getColumnModel(); cm.setRenderer(0, Ext.util.Format.usMoney); cm.setRenderer(1,myf); mygrid.reconfigure(mygrid.getStore(),cm); } </script> </head>


<cfset data = queryNew("price,product,type")> <cfloop from=1 to=10 index="x"> <cfset total = randRange(20,100) & "." & randRange(1,99)> <cfset product = "Product #X#"> <cfset queryAddRow(data)> <cfset querySetCell(data, "price", total+0, x)> <cfset querySetCell(data, "product", product, x)> <cfset querySetCell(data, "type", "#randRange(0,1)?'weapon':'fruit'#")> </cfloop>

<cfform name="test"> <cfgrid autowidth="true" name="data" format="html" query="data" width="600"> <cfgridcolumn name="price" header="Price"> <cfgridcolumn name="product" header="Product"> <cfgridcolumn name="type" header="Type"> </cfgrid> </cfform>

<cfset ajaxOnLoad("testgrid")> </body> </html>

If you compare this code to the older entry, the changes are:

  • In my fake query, I added a new type column. All my products are either weapons or fruits. (Although one could argue that you could turn some weapons into fruits. I mean turn some fruits into weapons. Yeah, that's it.)
  • Next look at the myf function. I kept the old logic in there commented out. You can see it made use of the data argument which is the cell being formatted. I ignore that though and check the rest of the row. This is passed in the record object. As you see, I check the TYPE and PRICE, and based on my business rule, I color the item red.
  • One small other change - back in the testgrid function (which remember is run when the application starts up), I changed getDataSource to getStore. This reflects the fact that the Grid used in CF9 has a different API then the one run in CF8.

If you want to see a demo of this, just hit the button below. You may need to reload once or twice since the values are random.

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About Raymond Camden

Raymond is a developer advocate for HERE Technologies. He focuses on JavaScript, serverless and enterprise cat demos. If you like this article, please consider visiting my Amazon Wishlist or donating via PayPal to show your support. You can even buy me a coffee!

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