TableColumn<Product,String> col=new TableColumn<>("name");
col.setCellValueFactory(new PropertyValueFactory<>("name"));
This code is used to create columns for tableview. I'm not able to understand how the code works. I do know that concepts like properties and callbacks are involved but I just have a basic idea about them,and I don't get how these concepts tie together to make the above code run. Could someone break it down for me in simple terms?
Related
I am visualizing multiple steps of a simulation and exporting them as a movie. Since the geometry is complicated, I would like to show it from several perspectives side-by-side, with the same pipeline.
Paraview has "Render View (Comparative)" which lets me do just that, but it resets the pipeline for each new comparative view. Since the pipeline is complex, I have to set it up manually for each new view, which is tedious, and changes to one don't change the other.
Am I overlooking a simple way to just show exactly the same thing, just from different point, in the comparative render view?
You can open a new view in the same layout (http://www.paraview.org/Wiki/Beginning_GUI#Split_windows) , and when you make a video you will record both because they are in the same layout.
Still, they will not be synchronized (to change the visibility of an object, you will have to do it in each view), maybe for automating this the python tracing can help.
First of all, I'm very new to the Xcode 4 and Obj C and I m trying to build a survey function with only one navigation button. I need a method for my navigation button which will produce the result that if users select the first option and then select the navigation button, it will bring them to the second view controller while if they select the second option the navigation button will take them to another view. Can someone please help
I am in the same boat. I wish that other people would have posted to this. If it helps at all, the if/else statement in the code snippet library probably holds the keys, now we just need to find the lock.
if (<#condition#>) {
<#statements-if-true#>
} else {
<#statements-if-false#>
}
I am still learning here, but I know that an important conceptual distinction is that you can handle this survey in one of at least two ways:
Use if/then logic to branch out to different questions.
Have the same questions for everyone, storing the answers in a plist file and then at the end, based on the results gather, branch at that point to final results screens.
This was posted last year so you may be well ahead of me, but as I find out more, I'll post here. I'll be happy to add to the reference resources.
– David
I have a mobile application that I want to try and reorganize so that it's easier to read and update and follows better practice.
I want to implement an MVC pattern, but I'm getting a little tripped up on getting there. I'm just hoping for some help with rebuilding the architecture.
Here's the outline of my application:
Level1) MainView has a column of 5 buttons that when clicked lead to View1, View2, View3, View4 or View5.
Level2) Each of these views is the same: a list, but each is populated with different data. Selecting an item brings the user to another set of views SubView1 - 20. that each are again populated with a list.
Level3) However, any selection made on a List in a SubView leads to a view that is always the same for all selection paths - but is populated with different data. Basically a button, another list, a text input and a textarea.
From what I gather, I should be able to use a lot less files and achieve something of the same result:
The model being a single class for data? The controller being a class or that controls the business logic, and a view that calls the controller?
Any suggestions, ideas and points in the right direction are greatly appreciated.
I'm guessing you'll be doing this in Flex4 and incorporate MVC pattern to some extent while doing so.
Have you looked into Cairngorm?
http://en.wikipedia.org/wiki/Cairngorm_%28Flex_framework%29
Good day!
There are instances of classes QListView and QTreeView.
Both of the instances loads data from model (QStandardItemModel).
QTreeView displays positions (For example: Chief, Manager, Developer, etc).
Clicking on the title of position a list of employees revealed.
QListView displays only positions of staff.
Question:
How can I display a full list of names of employees in QListView not showing their positions?
Which methods I need to override?
What can you advise in this situation?
P.S. Thanks!
I don't think you are going to be able to do that with a single model.
This thread suggests using a proxy model to flatten the original one without having to maintain two instances of that data. But the implementation pointed to (KDE's KReparentingProxyModel) isn't exactly trivial.
There is some documentation on proxy models, and the QSortFilterProxyModel might be usable in your context, although I think you'll need something more specific.
You might also find the classes attached to the third response on this thread: ModelView - how to use proxies to filter this data? interesting as a starting point.
(Sorry this isn't very specific. Searching for "qt flatten tree model" will give you other ideas.)
Try to use QListWidget, is easier than QListView.
I have a checkbox in a Flex DataGrid, and when I scroll, other rows are randomly checked/unchecked.
After reading over: Creating a column of RadioButtons in Adobe Flex
it's clear that the itemRenderers are getting recycled, but the problem I have with the solution presented there is it moves info about the view into the model.
Does anyone have a better way of solving it, that doesn't force me to put information for the UI into my actionscript model classes? (in my case, I am converting incoming XML data to actionscript classes, and these are getting bound to my datagrid).
Thanks for the help.
thanks everyone. great tips. unfortunately it was becoming too much overhead to keep the model pure, so i just polluted the model like the link in my original post. :( at least it works.
Chetan, neat idea.. i tried working with this for almost an entire day with no luck though.
brd6644, good thoughts on separating the two model classes.. i might go back and do this later.
You could create a subclass of DataGrid that internally stores what rows are checked/unchecked (Array/Collection of Boolean) but you would have a devil of a time keeping that in sync with the dataProvider when it is sorted or filtered. I suppose you could use a Dictionary that is keyed by the object in each index of the dataProvider and valued with a Boolean to indicate whether it's selected. That would at least isolate you from the sorting / filtering issues. This will not work if you have duplicate references in your dataProvider.
Alternatively, you could create a subclass of your ActionScript model class and add the "selected" property to it, then write some simple utility methods to "convert" between the two. That way your View deals only with the "ViewModel" class and other layers (especially the server side) deals only with the real "Model" class.
Adding to what cliff.meyers said, there is a third option of creating a custom IList class as described in this blog post by Alex Harui. It is pretty clever actually, and is cleaner as it doesn't require subclassing the component or polluting your model classes.