Sep 1, 2008

EXTJS themed file input field

Author: gaweee | Filed under: entrepreneurship

Theming a file input field has always been notoriously hard. Thanks to the guys who wrote the Ext UploadDialog script, theres now a better and more aesthetically pleasing way to create a file upload. I tried using their script wholesale but ran into some problems with the layout. So i kinda hacked and extracted their Ext.ux.BrowseButton code.

So now you can use it simply with:

	new Ext.ux.BrowseButton({
		input_name: "uploadfile1",
		text: "Select a file"
		onInputFileChange: function() {
			alert("you chose " + this.getInputFile().dom.value);
		}
	})
 
	new Ext.ux.TBBrowseButton({
		input_name: "uploadfile2",
		text: "Select another file"
	})

The first chunk of code creates a Browse Button (File Input) control as with the name uploadfile1. and the second chunk of codes creates a ToolBar Browse Button with the name uploadfile2.

Hypothetically you should be able to add a ToolBar button but i havent quite gotten a ToolBar Browse Button to fit aesthetically well inside a form. Let me know if you all come up with any examples that do!

Meanwhile, 3 cheers for the guys who wrote the Ext UploadDialog script!!!

Download the jQuery progressbar here: EXT Browse Button
or view the demo here

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Jun 17, 2008

HOWTO: Fix EXTJS Textarea for IE6

Author: gaweee | Filed under: development, howto

I encountered a interesting display bug when working with EXTJS recently. The following code renders well in FF 2 and above but not in IE6.

var form = new Ext.form.FormPanel({
	baseCls: 'x-plain',
	labelWidth: 140,
	url: 'abc/def.php',
	defaultType: 'textfield',
	items: [{
		fieldLabel: 'Name',
		name: 'name',
		anchor:'100%'  // anchor width by percentage
	}, {
		xtype: 'textarea',
		fieldLabel: 'Description',
		name: 'description',
		anchor: '100% -30'  // bug in IE6
	}]
});
 
var window = new Ext.Window({
	title: 'Some Window',
	width: 500, height: 300, 
	layout: 'fit',
	plain: true,
	buttonAlign: 'center',
	items: form
});
 
window.show();

brian.moeskau from the EXTJS forums was kind enough to answer this problem. The fix is a piece of code that primes the width of the controls to prevent it from overflowing out of the window/panels. The code is as follows

Ext.override(Ext.form.Field, {
    adjustWidth : function(tag, w){
        tag = tag.toLowerCase();
        if(typeof w == 'number' && !Ext.isSafari){
            if(Ext.isIE && (tag == 'input' || tag == 'textarea')){
                if(!Ext.isStrict){
                    return this.inEditor ? w : w - 3;
                }
                if(tag == 'input' && Ext.isStrict){
                    return w - (Ext.isIE6 ? 4 : 1);
                }
                if(tag == 'textarea' && Ext.isStrict){
                    return w-4;
                }
            }else if(Ext.isOpera && Ext.isStrict){
                if(tag == 'input'){
                    return w + 2;
                }
                if(tag == 'textarea'){
                    return w-2;
                }
            }
        }
        return w;
    }
});

I hope this will solve other people’s problems too!

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