ExtJS: Reloading a Combobox’s Store using OnTriggerClick

I am working on an application where i use a grid and have a combobox outside the grid whose selections are based on the selected rows within the grid. Basically the content of the combobox is dynamically updated based on the selection of rows. I’ve tried many ways of going about solving this problem since as usual i started getting Javascript errors in IE6. I first thought and tried to override the onTriggerClick function of the combobox, but i kept getting this bug where the first click on the trigger did not display the return list of values, but instead displayed a very thin blue box, and any subsequent click would then actually load the store and display the values correctly. Unable to find a solution i gave up on this approach and then tried to use the expand event to reload the combobox’s store. There i also encountered a bug where i would get an “Object is undefined” error in IE while clicking to trigger the combobox. I then did some research on the Sencha forum and then tried moving my code inside the beforequery event listener of the combobox. This worked like a charm.

For code example and a more detailed explanation, check the thread on the Sencha forum:


Popup Window in IE6: Window appears behind or below the main or parent window

I’ve been trying to open a popup window on selecting an item from a ComboBox in ExtJS and on opening the window, using


the popup would start loading and then quickly move below the current page. The behavior i observed only happened in IE6, Firefox loaded the popup fine and it stayed on top. With a bit of research and debugging on my own, i came to find out that something in the ExtJS code was causing the focus to return the <body> element of the main page. The solution to the problem?

//Function to open the Window
openDelegateWindow= function()
var popup = window.open( "qantume.htm", "Selector", "alwaysRaised=yes, status=0, height=300, width=650, resizable=0" );
 if (window.focus)
 return false;

//Function  calls for opening the window in your code
setTimeout(openDelegateWindow()', 100);

By delaying the start of the openDelegateWindow code, i am figuring the code execution has enough time to return the focus to the <body> tag, and then the open popup window can start uninterrupted and keep the focus on the popup window.

For your reference also i have found this script, which is helpful in making your popup quasi modal in that it checks the focus to make sure that it is not away from the current popup window, unless the focus is on one of the controls within the popup window. If the focus is anywhere else, it is rendered back to the popup window, making it basically stay on top until the user closes it. This is not foolproof, there are ways around, but they are really for the “I really need to break your script” type of user, as explained by the author. You can find it here: