A trivial override:
Ext.form.field.Base.override({
setLabel: function (text) {
if (this.rendered) {
Ext.get(this.labelEl.id).update(text);
}
this.fieldLabel = text;
}
});
I find the disabled fields in ExtJS 4 (and 3) too light, especially in Safari/Chrome. Just add this to your application’s CSS file to make them darker:
.x-item-disabled {
color: #888888 !important;
-moz-opacity: 100;
opacity: 1;
}
.x-form-item-label .x-item-disabled {
color: #888888 !important;
-moz-opacity: 100;
opacity: 1;
}
When installing Ubuntu 11 under VMWare Fusion it’s likely that the new Ubuntu “Unity” interface will not be enabled - you’ll just get some brief message during the install process or boot that the hardware doesn’t support it. I’m not 100% certain that this is a universal fix, but in my case using the “Additional Drivers” option under the “Administration” menu fixed the problem:
In the above image the “VMWare Client Tools” driver has been installed. When the “Additional Drivers” was initially displayed it was not - once it was installed I just restarted the Ubuntu VM and Unity started working.
Just creating an Ext.Panel with ‘draggable’ set to true will give you a panel that you can drag around, but you need to override the ‘onDrag’ and ‘endDrag’ methods to track the position of the panel when it’s being dragged and set it to that position when the drag ends.
var panel = new Ext.Panel({
draggable: {
insertProxy: false,
onDrag: function(e) {
var el = this.proxy.getEl();
this.x = el.getLeft(true);
this.y = el.getTop(true);
},
endDrag: function(e) {
this.panel.setPosition(this.x, this.y);
}
},
title: 'Panel',
width: 400,
height: 400,
x: 20,
y: 20
});
How to have an image that’s both draggable & resizable:
Ext.onReady(function() {var el = Ext.get('image1'); el.dd = new Ext.dd.DDProxy('image1', 'group');var r = new Ext.Resizable('image1', { preserveRatio: true, width: 400, height: 300, resizeChild: true }); });
The above assumes you have your image wrapped in a <div> with an id of “image1”, ie:
<div id=”image1”><img src=”images/test1.jpg”/></div>
In ExtJS 3.x to listen for double-click events on a GridPanel you attach a listener to the GridPanel like this:
this.on('rowdblclick', function(eventGrid, rowIndex, e) { console.log('double click'); }, this);
In ExtJS 4.0 you need to listen for events on the GridPanel’s view, via the “viewConfig”:
viewConfig: {
listeners: {
dblclick: function(dataview, index, item, e) {
console.log('dblclick');
}
}
}
In my case, I wanted the GridPanel to fire a ‘rowdblclick’ event just like it did in Ext 3.x, so I defined my Ext 4.x GridPanel class like this:
Ext.define('MyGridPanel', { extend: 'Ext.grid.GridPanel',viewConfig: {
listeners: {
'dblclick': {
fn: function(dataview, index, item, e) {
var gridPanel = this.ownerCt.ownerCt;
gridPanel.fireEvent('rowdblclick', this, index, e);
}
}
}
},initComponent: function() { this.addEvents( 'rowdblclick' ); this.callParent(arguments); } });
The “this.ownerCt.ownerCt” in the handler seems like hackery to me, but for now at least, in PR3, it works. Anyone have a better solution?
UPDATE FOR PR4:
The line “var gridPanel = this.ownerCt.ownerCt;” should be “var gridPanel = this.ownerCt;”
Say you have a standard ExtJS TextArea with a ‘keyup’ event listener, ie:
var commentsField = new Ext.form.TextArea({
fieldLabel: 'Comments',
name: 'Comments',
enableKeyEvents: true
});
commentsField.on('keyup', function(field, e) {
// Here's how you get the current cursor position/selection range:
var s, e;
if (Ext.isIE) {
var bookmark = document.selection.createRange().getBookmark();
var selection = field.el.dom.createTextRange();
selection.moveToBookmark(bookmark);
var before = field.el.dom.createTextRange();
before.collapse(true);
before.setEndPoint("EndToStart", selection);
var selLength = selection.text.length;
s = before.text.length;
e = s + selLength;
} else {
s = field.el.dom.selectionStart;
e = field.el.dom.selectionEnd;
}
}, this);
Just in case anyone would like to save the hour or so of Googling it took me to figure this out.
The ExtJS 3.2+ examples include a “RESTful store” which is a very interesting no-code way to get full CRUD behaviour from a GridPanel. Unfortunately the example is not written with a reusable structure - here is the same example, but as a pre-configured class:
Ext.onReady(function() {
Ext.QuickTips.init();
var TheGrid = Ext.extend(Ext.grid.GridPanel, {
title: 'Users',
frame: true,
height: 300,
width: 500,
viewConfig: {
forceFit: true
},
editor: new Ext.ux.grid.RowEditor({
saveText: 'Update'
}),
onAdd: function(btn, ev) {
var u = new this.store.recordType({
first: '',
last: '',
email: ''
});
this.editor.stopEditing();
this.store.insert(0, u);
this.editor.startEditing(0);
},
onDelete: function() {
var rec = this.getSelectionModel().getSelected();
if (rec) {
this.store.remove(rec);
}
},
initComponent: function() {
var proxy = new Ext.data.HttpProxy({
url: 'app.php/users'
});
var reader = new Ext.data.JsonReader({
totalProperty: 'total',
successProperty: 'success',
idProperty: 'id',
root: 'data',
messageProperty: 'message' // attribute in server response for user message...
}, [{
name: 'id'
}, {
name: 'email'
}, {
name: 'first',
allowBlank: false
}, {
name: 'last'
}]);
var writer = new Ext.data.JsonWriter({
encode: false
});
var store = new Ext.data.Store({
restful: true,
proxy: proxy,
reader: reader,
writer: writer
});
var config = {
store: store,
plugins: [this.editor],
columns: [{
header: "ID",
width: 40,
sortable: true,
dataIndex: 'id'
}, {
header: "Email",
width: 100,
sortable: true,
dataIndex: 'email',
editor: new Ext.form.TextField({})
}, {
header: "First",
width: 50,
sortable: true,
dataIndex: 'first',
editor: new Ext.form.TextField({})
}, {
header: "Last",
width: 50,
sortable: true,
dataIndex: 'last',
editor: new Ext.form.TextField({})
}],
tbar: [{
text: 'Add',
iconCls: 'silk-add',
handler: this.onAdd,
scope: this
}, '-', {
text: 'Delete',
iconCls: 'silk-delete',
handler: this.onDelete,
scope: this
}, '-']
};
Ext.apply(this, Ext.apply(this.initialConfig, config));
TheGrid.superclass.initComponent.apply(this, arguments);
},
onRender: function() {
this.store.load();
TheGrid.superclass.onRender.apply(this, arguments);
}
});
Ext.reg('my_grid', TheGrid);
var w = new Ext.Window({
modal: true,
items: {
xtype: 'my_grid',
title: 'Panel 1'
}
});
w.show();
});
As with so many things in ExtJS, the ‘ref’ option introduced in 3.0 is not very well documented, at least as far as I can tell. Which is unfortunate, because it’s extremely useful, and drastically reduces the need for ids. Here’s an example of how to use it:
Ext.onReady(function() {
Ext.BLANK_IMAGE_URL = 'ext/resources/images/default/s.gif';
Ext.QuickTips.init();
// Define a simple component
MyComponent = Ext.extend(Ext.form.FormPanel, {
frame: true,
initComponent: function() {
var config = {
items: [{
xtype: 'textfield',
fieldLabel: 'Name'
}, {
xtype: 'textfield',
fieldLabel: 'Address'
}],
bbar: ['->', {
text: 'Cancel',
minWidth: 100,
ref: '../cancelButton'
}, {
text: 'Save',
minWidth: 100,
ref: '../saveButton'
}]
};
Ext.apply(this, Ext.apply(this.initialConfig, config));
MyComponent.superclass.initComponent.apply(this, arguments);
}
});
Ext.reg('my_component_xtype', MyComponent);
// Create a display a window with the panel in it...
var w = new Ext.Window({
modal: true,
items: {
xtype: 'my_component_xtype',
title: 'Panel 1',
ref: 'theFormPanel'
}
});
w.show();
// See how we can use the references...
w.theFormPanel.saveButton.on('click', function() {
console.log('Save was clicked');
}, this);
console.log(w.theFormPanel.title);
});
While working with file uploads in Drupal, I had a situation where I needed to be able to attach metadata to FileFields. Specifically, the site needed to support video uploads, with a low-res Flash video that would be uploaded via Drupal. For each of these Flash videos, there would be a corresponding high-res broadcast video that would be hosted on an external server, and that would be made available to the user via a URL. So, I needed to be able to attach a “download URL” as metadata to each FileField. I wanted my upload form to look like this:
A few hours of Google searching led me to think that this was a pretty complex task - this page for instance is a detailed description of how to solve the problem, via the creation of a compound CCK field.
However, it turns out that there is a simpler solution, as described on the Trellon blog. Below is my description of how I solved the problem using the same technique.
The first thing you need to do is create your own Drupal module - this is very simple, and involves creating a folder in the “/sites/all/modules/” folder. My module is called “mediacentre”, so I created “/sites/all/modules/mediacentre/”, and in that folder I created two files - “mediacentre.info” and “mediacentre.module”.
Here is the “mediacentre.info” file:
; $Id:
name = Media Centre
description = Media Centre
core = 6.x
The “mediacentre.module” file is a little more complex:
<?php
function mediacentre_form_alter(&$form, $form_state, $form_id) {
if ($form_id == "story_node_form") {
// each field can have multiple values, we need to add custom process function to every upload field
foreach (element_children($form['field_video']) as $key) {
$type = $form['field_video'][$key]['#type'];
if ($type == 'filefield_widget') {
$a = array('filefield_widget_process', 'download_url_widget_process');
$form['field_video'][$key]['#process'] = $a;
$va = array('filefield_widget_validate', 'download_url_widget_validate');
$form['field_video'][$key]['#element_validate'] = $va;
}
}
}
}
function download_url_widget_process($element, $edit, &$form_state, $form) {
$file = $element['#value'];
$element['data']['download'] = array(
'#type' => 'textfield',
'#title' => t('Download URL'),
'#value' => $file['fid'] ? $file['data']['download'] : ''
);
return $element;
}
function download_url_widget_validate($element, &$form_state) {
}
In the above code the important method is “mediacentre_form_alter” - this is a Drupal form hook - the Drupal FAPI documentation has much more information on this, most of it horribly confusing if you’re just trying - like I was - to learn the basics. With the above method in our module, every time Drupal displays a form it will call our form hook, so we can customize the form as needed.
In the form hook method we check for the ID of the form we want to modify - this can be discovered by using Firebug or the Webkit Inspector to examine your page. In my case, I wanted to modify the Drupal form for editing nodes, and I was looking specifically for the forms that were used to upload my videos. I was using CCK for these fields, and the field name was “field_video”. If you use a different field name, then you have to change the use of ‘field_video’ in the method to the name of your own field.
For each ‘field_video’, we check for the ‘filefield_widget’, which is the actual upload form we want to modify, and we replace the existing ‘#process’ key for that array with a new value that includes the name of our “process” or “validate” method.
So, when Drupal displays the “filefield_widget”, it will now call our “download_url_widget_process” method, and that method will insert a new element into the form with the name ‘download’, and the title ‘Download URL’.
Right now we’re not doing any particular validation, so we just leave the “download_url_widget_validate” method blank. Normally this method would contain code to make sure that the value entered is OK.
And that’s it! When displaying your data in a tpl.php you have access to the new “download” value, in the same way you would access the “description” value, as a key in the item->data array.
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