I have a navigation menu into which I'm putting the ACL tree. That's working fine.
The navigation tree is growing larger and I notice performance getting a little sluggish with all of the isAllowed calls. I would like to cache the menu by user. While I can write my own view helper to achieve, I suspect it's likely that this is available through standard functionality. Does anyone know if this is possible?
Thanks
Related
I have just started using React JS and I am currently working on getting the google maps "google-maps-react" package up and running.
From my basic understanding of React JS, any change causes a whole component hierarchy to re-render.
From my understanding of the Google usage information via this link; any re-render constitutes as a usage.
Question
So with that, how do React JS developers handle\deal with this problem? 25,000 free map renders pre-React is fairly substantial but it seems like a fairly simple cap to burst with frameworks like React that cause a re-render for any change in your hierarchy.
Option 1
Is the best way to ensure the map component is not nested in a hierarchy that is updatable by other components? I wrote a sample application and confirmed that only the components in the hierarchy that invoked the change are re-rendered.
If this is the best way, that is fine but I am hoping to hear from more experienced React developers.
Thanks,
I think the 25k limit refers to you requesting the google maps js sdk, not how often you instantiate a google.maps.Map object.
And yes, it would be good practice to not re-render the component encapsulating the map all the time.
Check this simple map component:
https://github.com/Scarysize/react-maps-popup/blob/master/src/map.js
It initializes the map once and propagates the map instance up using a function as a child approach (ofc you could simply pass a callback as a prop).
After some digging I found that the "google-map-react" NPM package is doing something interesting behind the scenes. It is actually sending an update to your markers with the latest map state.
Once I found this, I tied into that behaviour and now my map only renders once and I dynamically handle marker changes based on this behaviour.
I was not able to find this behaviour documented anywhere but happened to stumble upon it via a console.log(JSON.stringify(this.props)) within my marker.
I want create a tree elements. For example, as this is figure
Can I use treeview, expandableview or NSOutlineView in monotouch?
Is there a tree of objects in monotouh?
There is no built-in or default control to represent a tree on iOS and frankly, you shouldn't really need one and most cases it should probably be avoided.
It's hard to fit a tree like control we have on our desktops in the touch world where you have huge fingers (so huge nodes) and with the nodes offset to show depth, there isn't much space left over. Adding it to the iOS environment would create a weird UX flow so you should re-think your design.
The common solution is to use tables with a detail accessory indicator and show a new controller the data (either a table or something else).
If you absolutely need one, you will need to roll your own. Check this for reference http://dotnet.kapenilattex.com/?p=566
I'm kind of a UI buff - every "screen" in my game should transition in/out when it appears or disappears. Because my game is simple in terms of resources, I thought I'd just make each "screen" a CCLayer and define a function for the transitions, leaving everything in memory. It's turning out to be more complicated than I expected.
I think I have two main problems right now:
1) Each "screen" is a CCLayer. This looks fine, but I can't seem to stop receiving touch events, even when they are inactive. Child sprites do not seem to respect the isTouchEnabled property, so I'm hitting invisible buttons all the time.
2) I wrote a custom button class that is basically a sprite with a few separate textures for states. It uses the CCTargetedTouchDelegate protocol. I'm thinking this is a big part of the above problem.
I'm not quite clear on the CCMenu stuff. Is there a tutorial or documentation out there that better explains its designed purpose and how to use it? The documentation for cocos2d doesn't talk at all about what each class does, which makes it much, much harder to properly use the library. Also, when should I use a scene instead of layers? Can I write custom transitions?
I found that if you have multiple layers in a single scene for menus, such as for a main menu (simpler to have a layer for load game, new game, etc. than an entire scene) that if you add all of you buttons as children of the layer; then to stop them from receiving touches, simply move the layer off screen when not in use. Heres an example.
[loadLayer setPosition:CGPointMake(-1000,-1000)];
[settingsLayer setPosition:CGPointMake(-1000,-1000)];
[menuLayer setPosition:CGPointMake(0,0)];
And each time you select a button that would take you to say the load game layer just reverse it for the right layer.
[loadLayer setPosition:CGPointMake(0,0)];
[settingsLayer setPosition:CGPointMake(-1000,-1000)];
[menuLayer setPosition:CGPointMake(-1000,-1000)];
It's more convenient to use CCScenes for menus. All of the children of an inactive CCScene will not receive touch events, so you don't have to manage that behavior. CCScenes also have built-in transitions like a crossfade, but if you're like me, you'll probably just want to run an action to make the scene transition out, then call CCDirector:replaceScene.
I'm creating a Book store in Magento and am having trouble figuring out the best way to handle the Authors of a Book (which would be the product).
What I currently have is an Attribute called "authors" which is multi-select and a thousand [test] values. It's still manageable but does get a little slow when editing a product. Also, when adding an option/value to the authors attribute itself, a huge list is rendered in the HTML making this an inefficient solution.
Is there another approach I should take?
Is it possible to create an Author object (entity type?) which is associated to a product through a join table? If yes, can someone give me an explanation about how that is done or point me to some good documentation?
If I'd take the Author object approach, could that still be used in the layered navigation?
How would I show the list of all books for a single author?
Thanks in advance!
PS: I am aware of extensions like Improved Navigation but AFAIK it adds something like attributes to attributes themselves which is not what I'm looking for.
For Googlers: The same would apply for Artists of a music site or manufacturers.
If you create an author entity type, you'll just increase your work trying to add it to layered navigation, and I don't see a reason why it would be faster.
Your approach seems the best fit to the problem, given the way Magento is set up. How are you going to display 1,000 (which presumably pales in comparison to the actual list) authors in layered navigation?
Depending on the requirements, you could go the route of denormalizing the field and accepting text for it. That would still allow you to display it, search based on it, etc, but would eliminate the need to render every possible artist to manipulate the list. You could add a little code around selecting the proper artist (basically add an AJAX autocomplete to the backend field) to minimize typos as well.
Alternatively, you could write a simple utility to add a new artist to the system without some of the overhead of Magento's loading the list. To be honest, though, it seems that the lag that this has the potential to create on the frontend will probably outweigh the backend trouble.
Hope that helps!
Thanks,
Joe
I’m building a website for a restaurant which consists of several static pages like ‘About us’ and editable menu.
I need a CMS flexible enough to be able to add items individually (by individually, I mean adding items doesn’t equal pasting a HTML list of n products into another static page).
Each item should contain its name, description, price and category. The list of added items should be displayed using templates the way I want them to.
Can you suggest any lightweight CMS which can provide similar conditions?
There are tons of options for simple page creation. Have you considered just using one of the many free website builders out there? Then you don't even have to worry about finding hosting, just make it happen quickly and easily with one of them. For instance, take a look at Weebly (review here) or Wix. Both allow for free pages and both are incredibly easy to use. Squarespace (review here) is another solid option (and one of my favorites) but charges a small fee (which I personally think is worth it).
Weebly allows for some slick drag and drop of page elements into place as does Wix. They are what I would classify as the easiest of the batch while Squarespace provides for an excellent user interface experience.
Other options if you'd prefer something hosted on your own would depend on your experience level. I am a huge fan of Processwire and ImpressPages has come along nicely and is great little CMS too.
These are exceptions to the typical Top Three that everyone tends to recommend I know but I like to spread the word about other projects instead of the usual ones.
Cheers!
Mike
Sounds like a job for Wordpress 3.0 plus Custom Post Types UI + Verve Meta Boxes plugins. Wordpress will handle the static pages, the other two plugins will allow you to make a Menu Item post type with custom fields.
It is not exactly lightweight, but you could do it with Drupal. You can define you own content type "product", use the CCK module to add your fields (price, ...) and use the Views module to display it how you want.
Drupal has a relatively steep learning curve, so it may be overkill for this project. It is definitely flexible enough for this, though.