I'm using Dojo 1.7 and I have a problem with the dojox/grid/DataGrid and dojox/data/CsvStore. I want to create a dojo DataGrid that responds to text input from the user. The user would type in something that is in CSV format into the text area and the CsvStore would read that data and feed it to the DataGrid but I have a few problems and questions.
CsvStore doesn't always load on time. That is, the _loadFinished property isn't always true when it is time to feed it to the DataGrid. Do I have to use Deferred or something? This object has no event properties as I had hoped.
It seems that DataGrid must absolutely have to have the structure property declared. I'm not sure if this is true can someone please tell me? Is there a way to bypass this? Because if not this leads to my third problem.
If I need to declare my DataGrid structure/layout, I need to know the fieldnames which I need to extract from CsvStore since I have no idea what my data looks like. I'm not sure how to do this because I can't call the internal _attributes property that holds the field names. It seems to me that my best bet is using the getAttributes(item) method but I don't know what item is and according to the documentation, this valuable is required.
Thanks for all your time.
So for anyone interested, this is how I fixed the issue.
Apparently CsvStore and all of the Dojo stores don't use their primary method _processData unless called by some other widget such as the Grid so it belongs on the same thread.
DataGrid must have a structure which is bizarre. I think it should be optional
There was no way to retrieve those fieldnames. I had to use string manipulation (sad-face). Maybe I'm wrong, hopefully someone can tell me how.
Related
I created an object that is backed by a Foundry Form and I would like to provide a user to change the properties of that object. I linked the form to the object and created a title property that is a hidden/ derived value in the object creation form. A user can edit property a and property b and the title of the object will be ab.
When the user updates the object in the edit form the title does not update. Is there a configuration I need to change?
Yes, this is possible. There's actually two ways to achieve this, I'll list them in order of my preference:
Using an action
The modern way of achieving this is to use an action. Actions allow you to flexibly "intercept" events like writes from users and do extra actions (hence the name) or prevent things from happening. They are a fairly new feature in foundry.
The basic concept is that you write a little piece of code (a function on an object) that gets executed when the object is modified. The function can then modify the object further or prevent the modification.
This is very flexible, because it will allow you to automatically update the title of the object regardless of how and when the object was edited. You can also apply more complex logic to derive the title from e.g. multiple properties with fallbacks, or modify a property in a certain way before you put it into the title, et cetera.
The drawback is that this requires you to write some code.
On your stack, if you navigate to https://www.palantir.com/docs/foundry/functions/use-functions/#actions you will find an introduction on how to get started with actions. The example solves the exact use-case you're asking for.
Using form templates
Another approach that's simpler and does not require writing any code, but is much less flexible, is to use a template in the form. You can create a template form widget that's invisible, and is automatically populated by values from other form fields.
The advantage is that this is very easy and quick to set up, but the disadvantage is that it will only apply when the object is edited through the form, and you can really only do concatenation, not much else.
It sounds like this is what you attempted to do, and I believe this should work. If it doesn't, I would check the following things:
make the template visible to see that it gets filled out like you expect it to
make sure the template is set to store its response into the right property on the object
make sure the user is using the form to edit the object, not some other way (like editing the property directly in hubble)
Hi I am doing a simple script where I want to track what step I am up to and use the result from a button click handler.
1)I cannot pass the variable as it is an event
2)Cannot use global variables as they seem to be constants only once set
Is there any way to set and object or variable multiple times and access the current value from within a handler function?
Found several examples suggesting a hidden widget, as well as that being a poor solution I also struggled to retrieve the value once set. IE it had a .setValue but no .getValue
Help please this is not a difficult thing in any other language I have tried but new to GAS
Cheers
There are more options - one, as you mentioned is to use a hidden widget. Although there is no .getValue(), it can be accessed through e.parameter within the click handler.
Two, for small amounts of data, you can use ScriptProperties / UserProperties and CacheService
Third, you can use the script DB or a spreadsheet if you are dealing with large amounts of data.
Having said all this, it would be better if you can post some code of what you're trying to achieve. Many times, code speaks louder than words.
Private Cache is intended for this type of thing https://developers.google.com/apps-script/reference/cache/
I'm usin Flash Builder to create some actionscript code that uses SharedObjects.
First question: how can I delete my local SharedObject in Flash Builder? I am debugging my program and the SharedObject sems to persist between runs. I want to start fresh and clean with no SharedObject storing my data. How do I get rid of it?
Also, in my SharedObject, I used mySharedObject.data["mykey"] to store a Dictionary. This Dictionary will have String keys and values of MyCustomClass. The problem is that when I later try to loop over the values of this Dictionary, I get error #1034 cannot convert object to type MyCustomClass. It seems like I can put an item of type MyCustomClass into this dictionary, but I can't get the item back out as anything other than an object.
Any idea what is going wrong?
Those are essentially two questions, so should have been asked as two questions. Anyway, I'd answer them here but still prefer that you break them up in two parts (possibly leave a link to the other one here for reference sake):
Local shared object, are useful exactly for persistence across runs. And then there's SharedObject.clear() to clear the state as required.
For you second issue, Shared Object's serialize your object into AMF, so that it can be written to disk or sent over network using RTMP. Now, your custom class can't really be serialized in AMF. What actually happens is that the public properties (and dynamic ones, if the class is declared dynamic) are serialized into the structure. So, the public data is stored... but it's essentially a general Object.
To work around that, you can have a public static readFrom(object:Object):MyCustomClass type function, which would read the properties from the passed object to construct a new MyCustomClass representing that information.
There are ways to register your class with the player to be stored in SharedObject (see here)... but you need to make sure that the code that de-serializes that data is aware of the class as well.
To make a class available for conversion, in your global initialization use registerClassAlias() call with MyCustomClass and its fully qualified name as parameters. The manual. Say your custom class is foo.bar.TheClass, you write:
registerClassAlias('foo.bar.TheClass',foo.bar.TheClass);
In order to drop old SO use delete call against so.data["mykey"] and do so.flush(). Edit: SharedObject.clear() is way better.
1/ Being persistent is one of the particularity of a SharedObject. To cleanup all its content, you need to call the clear method.
var shareObject:SharedObject = SharedObject.getLocal('justatest');
shareObject.data.test = 'test';
trace(shareObject.data.test)
shareObject.clear();
trace(shareObject.data.test)
output
test
undefined
2/ To store complex data types in SO, you need to use flash.net.registerClassAlias (example here)
I've made a resource dictionayry for a user control and create a class that derived from ResourceDictionary that managed different eventsetters and handlers for controls contained in the resource dictionary. So far so good, everything is working fine. My problem is to access members contained in my ResourceDictionary class from the user control. How to access a property in ResouceDictionary object from the user control?
Thanks a lot!
Ben
I finally find a way to handle it. I create a variable of my resourcedictionary type that handle also his events. After, I set the resource dictionary to the control by code with my variable. So now, I can handle events declared in my resource dictionary.
If someone need to see codes needed to get the job done, let me know.
I've written a JTree with couple of nodes. When I launch the program, I only see the node icons like folder or file and not the names associated with them. I could expand and collapse the nodes. When I debug, I see that the nodes are set with proper data whatever I used while building the model. In this program, i've written wrappers for JTree, TreeModel, DefaultMutableTreeNode. What could be the problem? Any pointers would be of great help.
-Paul
Sorry for not posting more details/code. Anyway, I've found the problem with my code. The problem was that I had overridden the toString() method in the class that I use to set as user object for the tree node, but that was returning null. As the method was returning null, there was nothing displayed. I made it to return the string to be displayed. It is working good now.
Thanks guys..!