Dynamic Grid in GXT 3.0

[ManoloComo]

I have to create a basic grid:

DataProperties dp = GWT.create(DataProperties.class);


List<ColumnConfig<Data, ?>> ccs = new LinkedList<ColumnConfig<Data, ?>>();
ccs.add(new ColumnConfig<Data, String>(dp.name(), 200, "Name"));
ccs.add(new ColumnConfig<Data, String>(dp.value(), 200, "Value"));
ColumnModel<Data> cm = new ColumnModel<Test.Data>(ccs);


ListStore<Data> s = new ListStore<Test.Data>(dp.key());
s.add(new Data("name1", "value1"));
s.add(new Data("name2", "value2"));
s.add(new Data("name3", "value3"));
s.add(new Data("name4", "value4"));


Grid<Data> g = new Grid<Data>(s, cm);


RootPanel.get().add(g);


////////////////////////////////////


public interface DataProperties extends PropertyAccess {
@Path("name")
ModelKeyProvider key();
ValueProvider<Data, String> name();
ValueProvider<Data, String> value();
}


public class Data {
private String name;
private String value;


public Data(String name, String value) {
super();
this.name = name;
this.value = value;
}
public String getName() {
return name;
}
public String getValue() {
return value;
}
public void setName(String name) {
this.name = name;
}
public void setValue(String value) {
this.value = value;
}
}



To do it I need of:
1)a model(Data);
2)an interface(DataProperties) that extends PropertyAccess,
3)a ListStore (a container populated with the model,the ColumnConfig,the ColumnModel).
It establishes the relationship between the table and the model.


I would want to create that four elements(DataProperties,ListStore,ColumnConfig,ColumnModel) in a generic way so I can reuse them in another model.Is there a way to do it?

Thanks

[Colin Alworth]

You do not need to use PropertyAccess to create grids, or anything in GXT. PropertyAccess is just a way to look at bean-like models, and provide access to ValueProviders, ModelKeyProviders, and LabelProviders within those beans. Often, if you have a dynamic data model, you can make your own such provider implementations that can generically read from your data model.

Check out the ValueProvider section of this blog post http://www.sencha.com/blog/building-gxt-charts/ for a discussion on how to make a very dynamic data model and how to make ValueProviders that can read them. The example is made for Charts, but the same principle applies for Grids as well.

[ManoloComo]

Thanks for you reply but I still have the problem.
I don't know how create a my implementation of ValueProvider.


My model:


public class User extends GenericObj implements Serializable {
private String userId;
private String password;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}


My UserProperties:


public interface UserProperties extends PropertyAccess<User> {
@Path("name")
ModelKeyProvider<User> key();
ValueProvider<User, String> userId();
ValueProvider<User, String> password();
}


MyView:


private UserProperties userProperties = GWT.create(UserProperties.class);
List<ColumnConfig<User, ?>> ccs = new LinkedList<ColumnConfig<User, ?>>();
//my problem is here...
ccs.add(new ColumnConfig<User, String>(userProperties.password(), 200, ""));
ccs.add(new ColumnConfig<User, String>(userProperties.userId(), 200, ""));
....


I'd want to create something as this:


List<ColumnConfig<GenericObj, ?>> ccs = new LinkedList<ColumnConfig<GenericObj, ?>>();
//for all fields of GenericObj
ccs.add(new ColumnConfig<GenericObj, String>(*something that substitute the bold line*, 200, ""));


Can I do it?
Thanks in advice, Manolo