Java And DIY AJAX Class This Week
Java and DIY AJAX Class This Week
The meaning of Encapsulation, is to make sure that "sensitive" data is hidden from users. To achieve this, you must:declare class variables/attributes as private
provide public get and set methods to access and update the value of a private variable
Get and SetYou learned from the previous chapter that private variables can only be accessed within the same class (an outside class has no access to it). However, it is possible to access them if we provide public get and set methods.
In this page, we have created a form that gets input from the user. When user clicks on the showTable button, sendInfo() function is called. We have written all the ajax code inside this function.
In the above example, the 'changethis' element is Ajax-enabled. The default#ajax['event'] is 'change', so when the 'changethis' element changes,an Ajax call is made. The form is submitted and reprocessed, and then thecallback is called. In this case, the form has been automaticallybuilt changing $form['replace_textfield']['#description'], so the callbackjust returns that part of the form.
In addition to using Form API for doing in-form modification, Ajax may beenabled by adding classes to buttons and links. By adding the 'use-ajax'class to a link, the link will be loaded via an Ajax call. When using thismethod, the href of the link can contain '/nojs/' as part of the path. Whenthe Ajax framework makes the request, it will convert this to '/ajax/'.The server is then able to easily tell if this request was made through anactual Ajax request or in a degraded state, and respond appropriately.
Similarly, submit buttons can be given the class 'use-ajax-submit'. Theform will then be submitted via Ajax to the path specified in the #action.Like the ajax-submit class above, this path will have '/nojs/' replaced with'/ajax/' so that the submit handler can tell if the form was submittedin a degraded state or not.
I ended up doing something like this to get the form to submit and validate via ajax, but it doesn't feel correct. Specifying the form's DOM id as the wrapper to replace is an unstable solution, as that can change with multiple form instances. It also doesn't allow updating any other DOM elements on successful submission.
I would expect that any ajax behaviors attached to a form injected via ajax would bind when Drupal.attachBehaviors(); is called, like every other part of Drupal, but this is not the case. Ajax enabled forms injected via ajax come through dead, and stay dead.
I did notice that ajax parameters for forms rendered traditionally were stored in Drupal.settings.ajax, and that this settings array was not generated via Drupal.attachBehaviors() for forms that were injected via ajax.
First off, I am very new to drupal and still learning! I have an ajax callback working for a drop down menu that activates when it changes. It updates a single table. I am trying to make the wrapper an array so it can update multiple tables. My 2nd table keeps disappearing instead of updating. Would this syntax be correct? ....'#ajax' => array('callback' => '_ajax_field_floor_area_callback','wrapper' => array ('field-area' => 'field-area','fire-options' => 'fire-options',)),'#default_value' =>...
I think the "method" handling gets a little disrupted if you handle it like this, too, which means you'll need to add ajax_command_invoke to invoke the replace effects you need if you don't see the fade in you'd like.
I've experienced an odd issue with the $form_state['values'] on a parent form element not passing through to subsequent ajax form elements. I had this working (and it still is) on a live site with a custom image rotate feature ( ) where the values are passing without any issues. In my development environment where I've updated core and contrib to everything around the time of the 7.41 release, the $form_state['values'] on the button that calls up the ajax based image rotate feature is no longer passing through to the ajax callback. This button is inserted via ajax when an image is uploaded. As you can see on the live site, everything works fine. The $form[input] value for that form element does pass through as does all of the other $form_state['values'] values. I'm using $form_state['input'] as a work around, which works basically in the same manner so that is fine. I don't see any major changes in the core ajax.inc files that would cause this and I've undone everything other than the drupal and contrib update in my dev environment and am still encountering the issue. In other words, it's not a critical issue as this is a highly specific use case, but I wanted to point out this inconsistency. Has anyone else experienced this?
Wakame is written using Java version 8 and uses some of its newest features such as lambda expressions, and the new parallel processing library. As a result, to compile and run Wakame, JDK 8 is needed, and it can be downloaded from this web site. Please download and install the JDK and make sure that you can run the java and javac command from the command line.
We will be rendering images info PFM files. The Wakame main class (to be discussed later) can open and display them, but it might be more convenient to use an external viewer that is integrated with the shell. For this, we recommend the PCG HDRITools by Edgar Velázquez-Armendáriz.
Wakame depends on a number of external libraries. All of them has already been included in the lib directory. Most of the time, you will be dealing with the vecmath library, which is responsible for basic linear algebra types, such as vectors, points, and linear transformations. You should already be familiar with this library if you have taken some Cornell's introductory graphics courses such as CS 4620 and CS 5625. Otherwise, please take some time to look at the Javadoc of the class Tuple3d, Point3d, VEctor3d, and Matrix4d. (Important: You should know what the scaleAdd method does to the receiver and the arguments!)
You will find that most classes have documentation markup in place. The most important class in Wakame is called WakameObject. It is the base class of everything that can be constructed using the XML scene description language. Other interfaces (e.g. Camera) derive from this class and expose additional more specific functionality (e.g. to generate an outgoing ray from a camera).
Here, the tag will cause the creation of an object of type Bsdf, and the type attribute specifies what specific subclass of Bsdf should be used. The tag creates a property of name albedo that will be passed to its constructor. If you open up the Java source file src/wakame/bsdf/Diffuse.java, you will see that there is a method called setProperties, which looks for this specific property:
We have learned about Wakame's object creation convention. Next, to use the above integrator, we must be able to specify it in an XML scene file and have the system create an instance from such a file. To this end, we pick the name "normal" for this integrator. To let the system knows that the name "normal" with this particular class, we register the "builder" of the class in the static initializer of the WakameObject class by adding the following new lines at the end.
Love this initiative to recommend 10 best courses for skill development.I wonder if you research in selecting these also include accessibility for disabled.There are over 1 billion disabled in this world and most of them rely on assistive technologies to access online material. I see that most of these classes are on accessible platforms, still, accessibly of the content is equally important. I love unbiased and authentic evaluation by Class Central.I can attest that your choice #1 and #10 are both accessible courses, as, I know of quite a few visually challenged learners have completed these class and based on their recommendation the course providers have actually modified the courses. Both classes have originated from Cambridge, MA.
I expect that most projects will fall (more or less)into one of two categories:Design. Design projects will usually attempt to solvesome interesting problem by proposing a design; implementing a prototype;and using the implementation as a basis for evaluating the proposedsystem architecture.Analysis. Analysis projects might, for example, studysome previously-proposed implementation technique,existing system, or class of systems;evaluate its security properties; find flaws, or strengths, in it;and provide new insight into how tobuild secure systems.The research should be relevant to computer security,but this will be interpreted broadly.You are encouraged to find topics of interest to you;feel free to be creative in selecting a project topic.You're welcome to pick a topic that is connected to yourcurrent research: for instance, if your primary research interestis in digital libraries, you would be welcome to do a class projecton some aspect of security, cryptography, or privacy in digital libraries.