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js4u

JS 4U 78: SlideUp with JQuery

August 2, 2011 8:56:42.204

Javascript 4 U

Today's Javascript 4 You. Today we look at the slideUp() function in JQuery. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube.

Join the Facebook Group to discuss the tutorials. You can view the archives here.

To watch now, click on the image below:

slideUp()

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

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smalltalk

More Pharo Documentation

August 2, 2011 8:40:20.000

Stef Ducasse has written two more chapters of Pharo documentation.

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search

Fun With Searching

August 2, 2011 8:07:19.204

I wonder whether Google has any edge cases like this one John Forsyth found in Bing?

At first I thought it was a problem with the URL I was searching for, but it turns out any search containing the words "view topic" will crash Bing.

See for yourself, with one of the examples he posted (Follow the link above for more):

"what topics do they discuss on The View?"

It turns out that Bing is filtering out searches for phpBB that involve viewtopic.php (a huge security problem, seemingly) - and a bunch of other searches are merely collateral damage. Go read the whole story - it's fascinating stuff.

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smalltalk

Seaside Sprint After ESUG

August 1, 2011 16:57:39.278

The VMWare (Gemstone) folks are sponsoring a post-ESUG Seaside sprint:

The fine folks at VMware (formerly GemStone) are so kind to pay for the venue of the Seaside Sprint after ESUG in Edinburgh.

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st4u

ST 4U 114: Code Recovery in Pharo

August 1, 2011 10:23:42.844

Today's Smalltalk 4 You looks at code recovery using Pharo. Sometimes, you lose an image (crash, inadvertant quit without saving, power outage...) - and you really don't want to lose whatever code you've been working on. Today we'll look at how to recover your work using tools built into Pharo. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below:

Code Recovery

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

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smalltalk

Deploying Smalltalk Apps

August 1, 2011 8:19:35.654

I've done a fair bit of posting (and screencasting) on this topic for VW - Torsten has covered the bases for Squeak and Pharo in a very impressive way.

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books

Griftopia

July 31, 2011 18:33:00.674

I just finished reading Griftopia - a fascinating look at the financial and political situation of the US after the 2008 crisis by Matt Taibbi. It's not an objective book, but if you take that into account, it's a very well written look at what happened (and more importantly, why it happened).

I've read pretty widely on this subject, and I think this book is one of the few I've read that really tries to look under the hood, as it were. If you want an unsparing examination of what's gone wrong, this is one book you should definitely look at.

One small caveat - if you're bothered by profanity, this book may not be for you. It's laced with it - in some ways, it reads more like a conversation than like typical prose. If you can get past that, it's worth a look. Also, check your ideology at the door. While my worldview and Taibbi's are pretty far apart, he doesn't spare anyone (or any party) in this book.

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PR

Does Paul Graham Understand PR?

July 30, 2011 21:42:50.000

A while back, Airbnb (a "rent your home to strangers" service) had a nasty incident where some grifters took advantage of a user of the system and robbed her blind. I read about that on TechCrunch - and they asked Airbnb what they were going to do for the customer. When he got an equivocal answer, he said the understandable thing: they weren't guaranteeing any compensation at all. To which Graham responded:

The story Arrington wrote yesterday about Airbnb not offering to help was bullshit. He asked a company spokesman what Airbnb was doing to help her. The spokesman, who’d been told by their lawyers that he couldn’t go into detail about that because of the precedent said “I can’t comment on that.” So Arrington, in typical Arrington fashion said “Well, unless you tell me I’m going to write that you’re not willing to do anything for her.” And he did. Really not cool. I’ve talked to the Airbnb guys and they are already doing everything they could be doing to help this woman.

Well. I can only assume that Graham hasn't even heard of PR. When something bad happens to a customer, and the PR staff are only willing to come back with blather, what the heck does he expect?

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podcasting

IM Hiatus This Weekend

July 30, 2011 18:07:02.664

The podcast will be in hiatus this weekend - I've been pretty busy, and haven't had time to put anything together. We'll be back next weekend with a new episode.

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smalltalk

The Method That is the Bane of my Work Life

July 30, 2011 15:34:49.627

I must have spent more time in the method #moveEditVerticallyBy: (in DatasetView) over the last decade than anywhere else. Just today, I was notcing a problem in the keyboard navigation in one of our datasets - and the reason is this bit of code at the bottom of the method:


	nextIndex == #changedIndex ifTrue: [^true].
	self editAt: nextIndex downcast: false.
	self triggerEvent: #cellGettingFocus.
	self topComponent keyboardProcessor currentConsumer: editor widget controller.
	^true

Note what's not there: a #valueChange sent to the controller. Without that, you get the bizarreness of the UI looking like it's selected, but the system doesn't actually register it as selected.

Now, that's in VW 7.6. In the latest release (7.8), this is fixed. Unfortunately, I'm not working in 7.8....

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st4u

ST 4U 113: Building Our First Component in Seaside

July 29, 2011 7:37:14.523

Today's Smalltalk 4 You continues the VA Smalltalk Seaside tutorial with the first visual component for the blog server application. You can download the initial domain model as a file out here. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below:

Seaside Component.

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:


Today we'll start building the first component that will make up the main entry point for our Seaside application. Before we can get started, we need to create an open edition of our application:

Create an Open Edition

Once you've done that, you'll see that the latest edition has a timestamp rather than a version - that shows that it's open (i.e., it can be modified):

Open Edition

Next, we'll create a new subclass of WAComponent, and call it BlogServerView. This class needs two instance variables - listComponent and menuComponent. We'll set up the #initialize method to work with two additional components that we'll also create - BlogListView and BlogMenuView. Seaside uses component based assembly, so we proceed as follows: create a container view, which in turn will hold references to all the views that need to render within it.

Domain Classes

The #initialize method looks like this:


initialize
	"set up our basic components"

	super initialize.
	listComponent := BlogListView new.
	menuComponent := BlogMenuView new.

At this point, you should also have defined two other subclasses of WAComponent - BlogListView and BlogMenuView. The first of these (BlogListView) needs one instance variable, entries. With that all done, we can get to the rendering part - #renderContentOn: in BlogServerView:

Rendering

That code looks like this:


renderContentOn: html
	html heading: 'Simple Blog Server'.

	html div
		class: 'menu';
		id: 'menuid';
		with:  self menuComponent.

	html div
		class: 'list';
		id: 'listid';
		with:  self listComponent.

We need one more method - typically an #initialize method on the class side of the main view class. In this case, we'll add it to BlogServerView, and then execute the comment:


initialize
	"BlogRootUI initialize"

     WAAdmin
          register: self
          asApplicationAt: 'blogView'.

With that done, bring up a web browser and navigate to the port you are running the server on (8080 if you took the default):

Browse Seaside

Notice the new link to blogView? Click that, and you should see the following:

Rendering

That wraps it up for now. In the next section, we'll take a look at building out the sub-components

Need more help? There's a screencast for other topics like this which you may want to watch. Questions? Try the "Chat with James" Google gadget over in the sidebar.

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js4u

JS 4U 77: More on Slide Down

July 28, 2011 8:33:34.701

Javascript 4 U

Today's Javascript 4 You. Today we continue looking at slideDown() in JQuery. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube.

Join the Facebook Group to discuss the tutorials. You can view the archives here.

To watch now, click on the image below:

slideDown()

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

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smalltalk

Who Looks at Smalltalk?

July 27, 2011 20:49:34.561

interesting thoughts on who took what ideas from Smalltalk, from Bruce Badger

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st4u

ST 4U 112: A Domain Model for the Seaside Tutorial

July 27, 2011 8:37:04.198

Today's Smalltalk 4 You continues the VA Smalltalk Seaside tutorial with a domain model that we'll be using for the tutorial. You can download the code as a file out here. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below:

Seaside.

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:


Today we'll continue with the Seaside tutorial using VA Smalltalk. To start, download this file - it's a file-out of the base application we'll be using in this tutorial. It contains the basic domain classes we'll be using:

Basic Domain

Before we can start building the Seaside part of this application, we need to examine the application. If SeasideComponentApp is not a pre-requisite, then the class will not be visible within our application. Since we'll be creating subclasses of that, make sure that this pre-req is set:

Proper Pre-Req

Now you'll just need the domain classes in the linked file above - BlogStorage, BlogPost, and BlogUser. To keep things simple, we'll be storing posts in a class variable collection in BlogStorage. That's so that we can concentrate on the Seaside part of things rather than anything else:

Domain Classes

Domain Classes

In the next section, we'll start in on the first view component.

Need more help? There's a screencast for other topics like this which you may want to watch. Questions? Try the "Chat with James" Google gadget over in the sidebar.

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smalltalk

The VisualWorks GUI Framework Explained

July 27, 2011 8:24:22.000

In a message to the vwnc mailing list, Travis Griggs has laid out the best explanation of how the VW UI works that I've ever seen - shedding light on the good, the bad and the ugly.

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gadgets

So Much For Insanely Great

July 27, 2011 0:19:31.780

Apple has always been about profit margin, but it used to be the case that they were also all about the user experience. Now that they are enforcing the "no link to outside stores" rule, they are all about a worse customer experience.

Someone ask Jobs this: do you really think that the extra margin you'll get from this rule will outweigh the irritation experienced by end users who suddenly have a less useful device with crappier features?

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js4u

JS 4U 76: Slide Down with JQuery

July 26, 2011 7:38:05.572

Javascript 4 U

Today's Javascript 4 You. Today we'll take a look at the slideDown() function in JQuery - you can gradually slide content on a page instead of fading. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube.

Join the Facebook Group to discuss the tutorials. You can view the archives here.

To watch now, click on the image below:

Slide

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

Enclosures:
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