How to put X inside textfield to clear text in extjs - button

Question

I want to implement an X button inside a textfield (x on right side of textfield) to clear entered texts. I have seen many extjs application that has this feature. How do I go about doing that? Any suggestion or comments would be really appreciated...
THanks
it looks something like this...

Answer 1

You have to use a Ext.form.field.Trigger. Here is a example for that
Ext.define('Ext.ux.CustomTrigger', {
extend: 'Ext.form.field.Trigger',
alias: 'widget.customtrigger',
initComponent: function () {
var me = this;
me.triggerCls = 'x-form-clear-trigger'; // native ExtJS class & icon
me.callParent(arguments);
},
// override onTriggerClick
onTriggerClick: function() {
this.setRawValue('');
}
});
Ext.create('Ext.form.FormPanel', {
title: 'Form with TriggerField',
bodyPadding: 5,
width: 350,
renderTo: Ext.getBody(),
items:[{
xtype: 'customtrigger',
fieldLabel: 'Sample Trigger',
emptyText: 'click the trigger'
}]
});
For ease of testing, here is a JSFiddle

Answer 2

This is what works for me with the CSS:
CSS
.x-form-clear {
background-image: url('../../resources/themes/images/default/form/clear-trigger.gif');
background-position: 0 0;
width: 17px;
height: 22px;
border-bottom: 1px solid #b5b8c8;
cursor: pointer;
cursor: hand;
overflow: hidden;
}
.x-form-clear-over {
background-position: -17px 0;
border-bottom-color: #7eadd9;
}
.x-form-clear-click {
background-position: -68px 0;
border-bottom-color: #737b8c;
}
Class
Ext.define('Ext.ux.form.field.Clear', {
extend: 'Ext.form.field.Trigger',
alias: 'widget.clearfield',
triggerBaseCls: 'x-form-clear',
onTriggerClick: function() {
this.setValue();
}
});
Usage
Ext.create('Ext.container.Container', {
renderTo: Ext.getBody(),
items: [
Ext.create('Ext.ux.form.field.Clear', {
fieldLabel: 'Clear Field',
cls: 'clear-trigger'
})
]
})

Answer 3

Or use this 'clearbutton' plugin: http://www.eekboom.de/ClearButton.html
I like it because it's just a plugin, one line, instead of requiring a custom subclass.
Also, it can be used on all kinds of fields, not just on a textfield.

Answer 4

You can use the Ext.form.field.Text with triggers in Extjs 5.0 and later, no need to define a new type.
var textfield = Ext.create('Ext.form.field.Text', {
triggers: {
clear: {
cls: 'x-form-clear-trigger',
handler: function () {
this.setValue('');
}
}
}
});
The scope of the trigger's handler is the Ext.form.field.Text component.
You can have multiple triggers, and can also use MVVM model. For example:
var textfield = Ext.create('Ext.form.field.Text', {
triggers: {
clear: {
cls: 'x-form-clear-trigger',
handler: function () {
this.setValue('');
}
},
search: {
cls: 'x-form-search-trigger',
handler: 'onSearch'
}
}
});
The search trigger uses a handler function, i.e. onSearch, that is defined in the controller of the component that has the Ext.form.field.Text object.

Answer 5

In ExtJS 6+, you can also just add the following 2 configs on your Ext.form.field.Text and show/hide the trigger with the built-in change listener
triggers: {
clearText: {
cls: 'clear-text-trigger-icon',
handler: function() {
this.setValue('');
}
}
},
listeners: {
change: function(textField) {
if (textField.getValue()) {
textField.setHideTrigger(false);
} else {
textField.setHideTrigger(true);
}
}
}