List Store
Many classes have shortcut names used when creating (instantiating) a class with a
configuration object. The shortcut name is referred to as an alias (or xtype if the
class extends Ext.Component). The alias/xtype is listed next to the class name of
applicable classes for quick reference.
Framework classes or their members may be specified as private or protected. Else,
the class / member is public. Public, protected, and private are access
descriptors used to convey how and when the class or class member should be used.
Public classes and class members are available for use by any other class or application code and may be relied upon as a stable and persistent within major product versions. Public classes and members may safely be extended via a subclass.
Protected class members are stable public members intended to be used by the
owning class or its subclasses. Protected members may safely be extended via a subclass.
Private classes and class members are used internally by the framework and are not intended to be used by application developers. Private classes and members may change or be omitted from the framework at any time without notice and should not be relied upon in application logic.
static label next to the
method name. *See Static below.Below is an example class member that we can disect to show the syntax of a class member (the lookupComponent method as viewed from the Ext.button.Button class in this case).
Let's look at each part of the member row:
lookupComponent in this example)( item ) in this example)Ext.Component in this case). This may be omitted for methods that do not
return anything other than undefined or may display as multiple possible values
separated by a forward slash / signifying that what is returned may depend on the
results of the method call (i.e. a method may return a Component if a get method calls is
successful or false if unsuccessful which would be displayed as
Ext.Component/Boolean).PROTECTED in
this example - see the Flags section below)Ext.container.Container in this example). The source
class will be displayed as a blue link if the member originates from the current class
and gray if it is inherited from an ancestor or mixed-in class.view source in the example)item : Object in the example).undefined a "Returns" section
will note the type of class or object returned and a description (Ext.Component in the
example)Available since 3.4.0 - not pictured in
the example) just after the member descriptionDefaults to: false)The API documentation uses a number of flags to further commnicate the class member's function and intent. The label may be represented by a text label, an abbreviation, or an icon.
classInstance.method1().method2().etc();false is returned from
an event handler- Indicates a framework class
- A singleton framework class. *See the singleton flag for more information
- A component-type framework class (any class within the Ext JS framework that extends Ext.Component)
- Indicates that the class, member, or guide is new in the currently viewed version
- Indicates a class member of type config
- Indicates a class member of type property
- Indicates a class member of type
method
- Indicates a class member of type event
- Indicates a class member of type
theme variable
- Indicates a class member of type
theme mixin
- Indicates that the class, member, or guide is new in the currently viewed version
Just below the class name on an API doc page is a row of buttons corresponding to the types of members owned by the current class. Each button shows a count of members by type (this count is updated as filters are applied). Clicking the button will navigate you to that member section. Hovering over the member-type button will reveal a popup menu of all members of that type for quick navigation.
Getting and setter methods that correlate to a class config option will show up in the methods section as well as in the configs section of both the API doc and the member-type menus just beneath the config they work with. The getter and setter method documentation will be found in the config row for easy reference.
Your page history is kept in localstorage and displayed (using the available real estate) just below the top title bar. By default, the only search results shown are the pages matching the product / version you're currently viewing. You can expand what is displayed by clicking on the button on the right-hand side of the history bar and choosing the "All" radio option. This will show all recent pages in the history bar for all products / versions.
Within the history config menu you will also see a listing of your recent page visits. The results are filtered by the "Current Product / Version" and "All" radio options. Clicking on the button will clear the history bar as well as the history kept in local storage.
If "All" is selected in the history config menu the checkbox option for "Show product details in the history bar" will be enabled. When checked, the product/version for each historic page will show alongside the page name in the history bar. Hovering the cursor over the page names in the history bar will also show the product/version as a tooltip.
Both API docs and guides can be searched for using the search field at the top of the page.
On API doc pages there is also a filter input field that filters the member rows using the filter string. In addition to filtering by string you can filter the class members by access level, inheritance, and read only. This is done using the checkboxes at the top of the page.
The checkbox at the bottom of the API class navigation tree filters the class list to include or exclude private classes.
Clicking on an empty search field will show your last 10 searches for quick navigation.
Each API doc page (with the exception of Javascript primitives pages) has a menu view of metadata relating to that class. This metadata view will have one or more of the following:
Ext.button.Button class has an alternate class name of Ext.Button). Alternate class
names are commonly maintained for backward compatibility.Runnable examples (Fiddles) are expanded on a page by default. You can collapse and expand example code blocks individually using the arrow on the top-left of the code block. You can also toggle the collapse state of all examples using the toggle button on the top-right of the page. The toggle-all state will be remembered between page loads.
Class members are collapsed on a page by default. You can expand and collapse members using the arrow icon on the left of the member row or globally using the expand / collapse all toggle button top-right.
Viewing the docs on narrower screens or browsers will result in a view optimized for a smaller form factor. The primary differences between the desktop and "mobile" view are:
The class source can be viewed by clicking on the class name at the top of an API doc page. The source for class members can be viewed by clicking on the "view source" link on the right-hand side of the member row.
A client side list of records.
<M> generic in ListStore<M> represents the bean model.For using the ListStore with editors see more on ListStoreEditor.
Initialize the ListStore<M> with the ModelKeyProvider<M> which provides the unique record identification.
ModelKeyProvider<M> is required constructor argument for ListStore<M>.
Simple Example:
ListStore<MyData> listStore = ListStore(modelKeyProvider);
The ListStore
Instantiating the ListStore requires a ModelKeyProvider which can be provided through a property access definition.
See more on PropertyAccess<M> definition configurations.
Property access definition Example:
// Define the keyProvider as a property.
public interface StockProperties extends PropertyAccess<Stock> {
@Path("id")
ModelKeyProvider<Stock> key();
}
// Instantiate the grid properties.
private static final StockProperties gridProperties = GWT.create(StockProperties.class);
// Instantiate the ListStore.
ListStore<Stock> listStore = new ListStore<Stock>(gridProperties.key());
Instantiating the ListStore with an anonymous ModelKeyProvider.
Anonymous ModelKeyProvider Example:
ListStore<Stock> listStore = new ListStore<Stock>(new ModelKeyProvider<Stock>() {
@Override
public String getKey(Stock item) {
return String.valueOf(item.getId());
}
});
Listed below are some of the operations that can manipulate the ListStores collection.
Adding to the ListStores collection.
Some of the available methods:
// add an item
listStore.add(item);
// add item at the visible index
boolean success = listStore.add(index, item);
// add a collection
boolean success = listStore.addAll(items);
// add a collection starting at visible index
boolean success = listStore.addAll(index, items);
// replace all the items
listStore.replaceAll(items);
Filtering the ListStore will hide visible items.
See more on store filtering.
Some of the available methods:
// get the attached filters
LinkedHashSet<StoreFilter<Stock>> filters = listStore.getFilters();
// are the filters enabled
boolean enabled = listStore.isEnableFilters();
// remove a filter
listStore.removeFilter(StoreFilter<M> filter);
// remove all the filters
listStore.removeFilters();
// enable or disable attached filters
listStore.setEnableFilters(boolean enableFilters);
// get all the attached filters
LinkedHashSet<StoreFilter<Stock>> filters = listStore.getFilters();
Getting data from the ListStore.
Some of the available methods:
// get the item at the visible index
M item = listStore.get(index);
// find the item based on its unique identifier.
M item = listStore.findModelWithKey(java.lang.String key);
// gets all the items
List<M> items = listStore.getAll();
// find the visible index of an item
int index = listStore.indexOf(item);
// find a sublist of the visible items
List<M> subItemsList = listStore.subList(int start, int end);
// find the model in the list
M model = listStore.findModel(M model);
// do the models key match
Boolean matching = listStore.hasMatchingKey(M model1, M model2);
// find the keyProvider
ModelKeyProvider<M> provider = listStore.getKeyProvider();
// get the list store size of visible items
listStore.size();
Removing and clearing data in the ListStore.
Some of the available methods:
// removes all the records.
listStore.clear();
// remove record from visible index
M model = listStore.remove(index);
// remove item matching model unique identifier
boolean success = listStore.remove(item);
Sorting records in the ListStore.
See more on store sorting.
Some of the available methods:
// add a sort
listStore.addSortInfo(StoreSortInfo<M> info);
// add a sort at index
listStore.addSortInfo(int index, StoreSortInfo<M> info);
// clear the sort
listStore.clearSortInfo();
// re-apply a sort
listStore.applySort(boolean suppressEvent);
// get the sort configuration
List<StoreSortInfo<Stock>> sortInfo = listStore.getSortInfo();
Working with records in the ListStore.
Working with records can fire StoreRecordChangeEvents and StoreUpdateEvent events.
Some of the available methods:
// does the record exist
boolean hasRecord = listStore.hasRecord(M data);
// Gets records with uncommitted changes
Collection<Store<M>.Record> modifiedItems = listStore.getModifiedRecords();
// Get the model record and if it doesn't exist it will create a record by default.
// Don't create a record by wrapping this with: if (listStore.hasRecord(M data)) { // get record }
ListStore<M>.Record record = listStore.getRecord(item);
// commit changes to the model
listStore.commitChanges();
// is autocommit on
boolean autoCommit = listStore.isAutoCommit();
// Cancel changes
listStore.rejectChanges();
// autocommit will update the model immediately. Otherwise que changes
listStore.setAutoCommit(boolean isAutoCommit);
Updating data in the ListStore.
Some of the available methods:
// replaces record matching model unique identifier
listStore.update(item);
The StoreHandlers adds most of the handlers at one time.
Although it is possible to add these same handlers separately.
Some of the available methods:
// fire an event from the listStore.
listStore.fireEvent(event);
This is a group of the StoreHandlers.
The individual handlers are listed below this.
Example of the StoreHandlers:
StoreHandlers<Stock> handlers = new StoreHandlers<Stock>() {
@Override
public void onAdd(StoreAddEvent<Stock> event) {
}
@Override
public void onRemove(StoreRemoveEvent<Stock> event) {
}
@Override
public void onFilter(StoreFilterEvent<Stock> event) {
}
@Override
public void onClear(StoreClearEvent<Stock> event) {
}
@Override
public void onUpdate(StoreUpdateEvent<Stock> event) {
}
@Override
public void onDataChange(StoreDataChangeEvent<Stock> event) {
}
@Override
public void onRecordChange(StoreRecordChangeEvent<Stock> event) {
}
@Override
public void onSort(StoreSortEvent<Stock> event) {
}
};
listStore.addStoreHandlers(handlers);
Fires on add.
listStore.addStoreAddHandler(new StoreAddHandler<Stock>() {
@Override
public void onAdd(StoreAddEvent<Stock> event) {
}
});
Fires on record removal.
listStore.addStoreRemoveHandler(new StoreRemoveHandler<Stock>() {
@Override
public void onRemove(StoreRemoveEvent<Stock> event) {
}
});
Fires on record update.
listStore.addStoreUpdateHandler(new StoreUpdateHandler<Stock>() {
@Override
public void onUpdate(StoreUpdateEvent<Stock> event) {
}
});
Fires on record change.
listStore.addStoreRecordChangeHandler(new StoreRecordChangeHandler<Stock>() {
@Override
public void onRecordChange(StoreRecordChangeEvent<Stock> event) {
}
});
Example reverting a record after change.
final DoubleField priceField = new DoubleField();
priceField.addValidator(new MaxNumberValidator<Double>(99.99));
// record whether the entry of the record was valid
priceField.addInvalidHandler(new InvalidHandler() {
@Override
public void onInvalid(InvalidEvent event) {
invalidPriceRecord = true;
}
});
// record whether the entry of the record was valid
priceField.addValidHandler(new ValidHandler() {
@Override
public void onValid(ValidEvent event) {
invalidPriceRecord = false;
}
});
// Listen for record changes and revert the incorrect entries.
store.addStoreRecordChangeHandler(new StoreRecordChangeHandler<Plant>() {
@Override
public void onRecordChange(StoreRecordChangeEvent<Plant> event) {
Store<Plant>.Record record = event.getRecord();
// revert value if invalid
if (invalidPriceRecord) {
record.revert();
}
}
});
Fires on filter selection.
listStore.addStoreFilterHandler(new StoreFilterHandler<Stock>() {
@Override
public void onFilter(StoreFilterEvent<Stock> event) {
}
});
Fires on clearing the records.
listStore.addStoreClearHandler(new StoreClearHandler<Stock>() {
@Override
public void onClear(StoreClearEvent<Stock> event) {
}
});
Fires on record change.
listStore.addStoreDataChangeHandler(new StoreDataChangeHandler<Stock>() {
@Override
public void onDataChange(StoreDataChangeEvent<Stock> event) {
}
});
Fires on sort selection.
listStore.addStoreSortHandler(new StoreSortHandler<Stock>() {
@Override
public void onSort(StoreSortEvent<Stock> event) {
}
});
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