I want to create a new class to customize dialogpreference.Though I try to many methods,they all didn't work. And I find a way to use the layout prepared as the layout of dialog in the dialogpreference on the site as follow: How to access widgets in a custom DialogPreference with a inflated layout?.
When I try to use the layout like this: setDialogLayoutResource(R.layout.address_dialog); But it didn't work.Can you help me solve the problem?
It is better late then never :) and I think the answer to this question already exists somewhere on the SO.
You should write something like this in your :
#Override
public View onCreateDialogView() {
LayoutInflater layoutInflater = LayoutInflater.from(getContext());
View view = layoutInflater.inflate(R.layout.city_select_dialog, null);
// {Your code here}
return view;
}
Related
TL;DR: How do I combine info from two database tables into a Vaadin Treetable (or, when Vaadin 7.5 is released, a heirarchical Grid)?
I have a Java Swing desktop application that does this currently, albeit probably very ineffeciently with ArrayLists of Java Beans that updates from the SQL Server every 30 seconds. Well, I'm now attempting to port this desktop app over to a Vaadin web app. The desktop app has login capabilities and I'll eventually worry about doing the same for the web app, but for now, I just want to try and get the most basic part of this web app working: The Treetable. Or, hopefully soon, a heirarchical Grid.
To help illustrate what I'm aiming for, I'll try and post an image I created that should show how the data from the two tables needs to merge into the treetable (using a partial screenshot of my existing desktop app):
I am well aware of how to use the JOIN command in SQL and I've briefly read about Referencing Another SQLContainer, but I'm still in the early stages of learning Vaadin and still trying to wrap my head around SQLContainer, FreeformQuery, and how I need to implement FreeformStatementDelegate for my project. Not to mention that I'll need to implement checkboxes for each row, as you can see in that photo, so that it updates the database when they are clicked. And a semi-checked state for the checkbox would be necessary for Jobs that have more than one OrderDetail item wherein only some of those OrderDetail items are completed. To get that working for my Java Swing program, I had to lean on an expert Java developer who already had most of the code ready, and boy, is it super-complicated!
If anyone can give me a high-level view of how to accomplish this task along with some examples, I would be indebted. I totally understand that I'm asking for a great deal here, and I'm willing to take it slow, step-by-step, as long as you are. I really want to fully understand this so I'm not just copy-pasting code without thinking.
I have never used SQLContainer so this might not be the answer you want. I just had a quick look at SQLContainer and I'm not sure if it will serve your purpose. For a TreeTable you will need a Container Implementing the Container.Hierarchical interface or the table will put a wrapper around it and you have to set the parent-children relations manually. You probably could extend SQLContainer and implement the methods from Container.Hierarchical in that class but this might get complicated.
In your situation I think I'd go with implementing my own Container, probably extending AbstractContainer, to get the listener code for free, and implementing Hierarchical. There are quite some methods to implement, I know, and so this will need some time, but most methods are quickly implemented and you can start with the basic methods and add more interfaces (Ordered, Sortable, Indexed, Filterable, Collapsible,...) later.
If done properly you'll end up with with easy readable code that can be extended in the future without to much trouble and you will not depend on future versions of SQLContainer.
Another good thing is that you'll learn a lot about the data structures (Container, Item, Property) used in vaadin. But as I said I don't really know SQLContainer so maybe there will be a better answer telling you that it is easy with the SQLContainer
For the Checkbox feature you could go display the name/product property as a CheckBox. With Icon and Caption it looks almost like you want it. See http://demo.vaadin.com/sampler/#ui/data-input/other/check-box and set an Icon. The semi-checked state could be done with css.
Hope this helps you finding the right solution for your task.
I'll admit that I'm a beginner with vaadin myself and there may be much better ways of doing this, but here's something I've mocked up which seems to work. It doesn't do everything you need but it might be a base to start from. Most importantly, for changes to be saved back into the database you'll need to update the SQLContainers when something in the container is changed.
import com.vaadin.data.Item;
import com.vaadin.data.Property;
import com.vaadin.data.util.HierarchicalContainer;
import com.vaadin.data.util.sqlcontainer.SQLContainer;
#SuppressWarnings("serial")
public class TwoTableHierarchicalContainer extends HierarchicalContainer {
private SQLContainer parentContainer;
private SQLContainer childContainer;
private String parentPrimaryKey;
private String childForeignKey;
public TwoTableHierarchicalContainer(SQLContainer parentContainer, SQLContainer childContainer,
String parentPrimaryKey, String childForeignKey) {
this.parentContainer = parentContainer;
this.childContainer = childContainer;
this.parentPrimaryKey = parentPrimaryKey;
this.childForeignKey = childForeignKey;
init();
}
private void init() {
for (Object containerPropertyIds : parentContainer.getContainerPropertyIds()) {
addContainerProperty(containerPropertyIds, Object.class, "");
}
for (Object containerPropertyIds : childContainer.getContainerPropertyIds()) {
addContainerProperty(containerPropertyIds, Object.class, "");
}
for (Object itemId : parentContainer.getItemIds()) {
Item parent = parentContainer.getItem(itemId);
Object newParentId = parent.getItemProperty(parentPrimaryKey).getValue();
Item newParent = addItem(newParentId);
setChildrenAllowed(newParentId, false);
for (Object propertyId : parent.getItemPropertyIds()) {
#SuppressWarnings("unchecked")
Property<Object> newProperty = newParent.getItemProperty(propertyId);
newProperty.setValue(parent.getItemProperty(propertyId).getValue());
}
}
for (Object itemId : childContainer.getItemIds()) {
Item child = childContainer.getItem(itemId);
Object newParentId = child.getItemProperty(childForeignKey).getValue();
Object newChildId = addItem();
Item newChild = getItem(newChildId);
setChildrenAllowed(newParentId, true);
setParent(newChildId, newParentId);
setChildrenAllowed(newChildId, false);
for (Object propertyId : child.getItemPropertyIds()) {
#SuppressWarnings("unchecked")
Property<Object> newProperty = newChild.getItemProperty(propertyId);
newProperty.setValue(child.getItemProperty(propertyId).getValue());
}
}
}
}
Ok so I am really stuck now. I have a h:datatable and the only way to get the row details seems to be DataModel#getRowData(). Unfortunately ListDataModel which is needed to wrap the necessary data is NOT serializable so will not work on GAE, and I really need it to work! Does anyone have any idea about any workaround or some way to make it function.
Help much appreciated!
Mark the property transient (so that it will be skipped during serialization) and introduce lazy loading in the getter.
E.g.
private List<Item> itemList;
private transient DataModel<Item> itemModel;
public DataModel<Item> getItemModel() {
if (itemModel == null) {
itemModel = new ListDataModel<Item>(itemList);
}
return itemModel;
}
There are by the way alternate ways to retrieve the current row. See also How can I pass selected row to commandLink inside dataTable?
I am new to WPF and Prism, but I already learned that you have to register a View in Unity as an object:
Container.RegisterType<Object,MyView>("My.Assembly.MyView");
Still, when I use
var RelativeUriToMyView = new Uri("My.Assembly.MyView",UriKind.Relative);
RegionManager.RequestNavigate(RelativeUriToMyView, RegionName, CallbackResult);
the MyView displays as System.Object, and the CallbackResult contains no Error.
What am I missing? I'm happy to provide more information if needed.
You would want to look at the RegionNavigationContentLoader.cs in the PRISM source code; Here is the code that is loading the view for you.
protected virtual object CreateNewRegionItem(string candidateTargetContract)
{
object newRegionItem;
try
{
newRegionItem = this.serviceLocator.GetInstance<object>(candidateTargetContract);
}
catch (ActivationException e)
{
throw new InvalidOperationException(
string.Format(CultureInfo.CurrentCulture, Resources.CannotCreateNavigationTarget, candidateTargetContract),
e);
}
return newRegionItem;
}
There are several helper methods that take the URI, extract the query string, and create the 'name' used to lookup your view and cast it as an object.
Essentially, the name you are using to associate your concrete class as an object with Unity is the same one you'll need to use when you try to resolve the object with Unity. Here is some pesudocode to explain,
Container.RegisterType<object, ConcreteClass>(typeof(ConcreteClass).FullName);
Locator.GetInstance<object>(UriWithFullName)
If none of this helps, post the RelativeUriToMyView so I can see the contents.
Good luck.
The issue seemed to be caused by registering the view with its FullName (My.Assembly.MyView) instead of its Name (MyView).
Edit:
Changed the question to more accurately reflect the issue.
Some background on what I'm doing
I usually like to have my pages return the url needed to access it. So i will normally have a method like so
public partial class ProductDetails : Page
{
public static string GetUrl(Guid productId)
{
return "fully qualified url";
}
}
on my other pages/controls that need to access this page i'll simply set the link as
hl.NavigateUrl = ProductDetails.GetUrl(id);
I'm toying around with the new UrlRouting stuff in 4.0 and ran into something I'm not sure will work. I'm trying to use the Page.GetRouteUrl in my static method, and obviously it's blowing up due to Page not being static.
Does anyone know if it's possible replicate what i'm doing with GetRouteUrl?
thx
You can do something like:
var url = ((Page)HttpContext.Current.Handler).GetRouteUrl(id);
Note: If you called this method from another page, you may not get the desired result if it's relative-specific in some way...but it's as good as you can get with static I believe.
I got GetRouteUrl to work using Nicks suggestion above.
I also found an alternative way to do it w/o using the GetRouteUrl. You are basically generating it manually using GetVirtualPath
public static string GetUrl(int productId)
{
var parameters = new RouteValueDictionary { { "productId", productId } };
var vpd = RouteTable.Routes.GetVirtualPath(null, "product-details", parameters);
return vpd.VirtualPath;
}
I'm looking for some help understanding how to generate pages from a database to create a catalog of items, each with different URLs. All I can seem to find through google are products that will do this for me, or full e-commerce solutions. I don't want a shopping cart! Just an inventory.
Also, perhaps someone could recommend their favorite/the best simple login solution.
Thank you so much for your time and any help, suggestions, comments, solutions.
I just posted a thorough solution to another question that is very closely-related to this question. I'll re-post it here for your convenience:
I would suggest using some of the MVC (Model, View, Controller) frameworks out there like KohanaPHP. It is essentially this. You're working in a strictly Object-Oriented environment. A simple page in Kohana, build entirely from a class would look like this:
class Home_Controller extends Controller
{
public function index()
{
echo "Hello World";
}
}
You would then access that page by visiting youur url, the class name, and the method name:
http://www.mysite.com/home/ (index() can be called after home/, but it's implicit)
When you start wanting to bring in database-activity, you'll start working with another Class called a Model. This will contain methods to interact with your database, like the following:
class Users_Model extends Model
{
public function count_users()
{
return $this->db->count_records('users');
}
}
Note here that I didn't write my own query. Kohana comes with an intuitive Query Builder.
That method would be called from within your Controller, the first class that we mentioned at the beginning of this solution. That would look like this:
class Home_Controller extends Controller
{
public function index()
{
$usersModel = new Users_Model;
$userCount = $usersModel->count_users();
echo "We have " . $userCount . " users!";
}
}
Eventually, you'll want more complicated layouts, which will involve HTML/CSS/Javascript. At this point, you would introduce the "Views," which are just presentation layers. Rather than calling echo or print from within the Controller, you would load up a view (an HTML page, essentially) and pass it some variables:
class Home_Controller extends Controller
{
public function index()
{
$myView = new View("index");
$usersModel = new Users_Model;
$userCount = $usersModel->count_users();
$myView->userCount = $userCount;
$myView->render(TRUE);
}
}
Which would load the following "View"
<p>We have <?php print $userCount; ?> users!</p>
That should be enough to get you started. Using the MVC-style is really clean, and very fun to work with.
There's a lot of tools out there for generating a web interface around a data model. I find Django pretty easy to use. Based on its popularity, I'm sure that Ruby on Rails is another viable option.