Invalid Argument Error using ScriptTagProxy and IE6

As explained in my earlier post, i used Ext.data.ScriptTag proxy for some cross-domain AJAX data retrieval. Testing in IE6, I kept getting an “Invalid Argument” error in IE traced to this line in the code. A search on the Sencha forum turned up only this post, with no good solution posted. I traced the problem to the this.head.removeChild lines, for some reason, IE6 chokes on it. The fix is quite simple, i overrode the function to use parentNode.removeChild:

Ext.override(Ext.data.ScriptTagProxy, {
	destroyTrans : function(trans, isLoaded){
	try
	{
    	this.head.removeChild(document.getElementById(trans.scriptId));
	}
	catch(e)
	{
		//IE6 does not like removeChild() to be called directly from the parent element
		  document.getElementById(trans.scriptId).parentNode.removeChild(document.getElementById(trans.scriptId))
	}
    clearTimeout(trans.timeoutId);
    if(isLoaded){
        window[trans.cb] = undefined;
        try{
            delete window[trans.cb];
        }catch(e){}
    }else{
        // if hasn't been loaded, wait for load to remove it to prevent script error
        window[trans.cb] = function(){
            window[trans.cb] = undefined;
            try{
                delete window[trans.cb];
            }catch(e){}
        };
    }
}
	});
Advertisements

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:

http://www.sencha.com/forum/showthread.php?119029-Reloading-a-Combobox-using-onTriggerClick&p=552445#post552445

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

window.open,

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)
 {
 popup.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:

http://getyourwebsitehere.com/jswb/modwin/modalwinparent.html#code

 

IE6: Invalid Argument Error

If you are using ExtJS and getting an “Invalid Argument” Javascript error in IE6, make sure to check your CSS for example, i get them when dynamically setting “Width” on an element. If the value is not conventionally expressed in pixels. IE will choke on it while Firefox will still accept it. Make sure then to check your style for mispelled words, or incorrectly specified widths or heights

Disappearing Ext JS RadioGroup and CheckboxGroup inputs in IE6

I ran into an issue in IE6 with a bunch of my controls not showing up when the page loaded. It was specially with the RadioGroup control in ExtJS. The radio buttons would display fine in Firefox but not appear at all in IE6 even though the HTML was present. I thought it was a width or height issue as it is often the case with ExtJS and IE6 but nothing i did could take care of the problem. I then looked at the container panels of the RadioGroups i was trying to display and realized that i was using a “layout:column” setting, which floats the items in the container left.

During my research on this bug, i stumbled upon a bug in IE6 called the “PeekABoo” bug where content inside a liquid floated bug suddenly disappears. I am not exactly sure the issue is completely related to the problems I was facing but it seems related. In order to get my radiogroups to display, i had to change the value to “layout:auto”. This worked for me and it is the default value if no layout property is specified. In general, I’ve found out that display issues in IE also are related to setting an actual width or height property on panel objects.  Well you know what to try in case you run into the issue and share in the comments whatever solution worked for you. It can be nightmarish to figure out what’s going on, and this is the reason why i decided to share my experiences on this blog.

Disappearing ExtJS buttons in IE 6

I officially hate IE6 and know the reason why now, ExtJS. Working with this library has opened my eyes to the deficiencies in the browser. Enough has been said on the topic so let me get to the meat of the matter.I spent a crazy amount of time figuring out why one button i was trying to set up would not display in IE6. It would some some kind of image, but would only show the entire button when the button was hovered on with the mouse. I tried setting the width, the height, the line height with no results. Here is how i was trying to set up my button:


var lookupButton = new Ext.Button({
text:'Lookup',
style:'float:right'
})

Doing so, i got an error in IE6 that stated:

el.owner.createDocument.createRange Object doesn’t support this property or method.

It turns out this is a bug in IE where trying to insert a block level element after a plain text creates this error. The solution for me was to add a span around the text i was creating like:


{
width: this.displayWidth,
html: '<span>' +  String(this.value) + '</span>'

}

Hope it helps!