GWT comboBox multiSelect - extjs

Question

I try to make my comboBox multiple selection
and this my code:
this multiSelectComboBox:
import java.util.List;
import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.event.ComponentEvent;
import com.extjs.gxt.ui.client.event.WindowEvent;
import com.extjs.gxt.ui.client.event.WindowListener;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.widget.CheckBoxListView;
import com.extjs.gxt.ui.client.widget.Dialog;
import com.extjs.gxt.ui.client.widget.form.TriggerField;
import com.extjs.gxt.ui.client.widget.layout.FillLayout;
import com.google.gwt.user.client.Element;
public class MultiSelectComboBox<D extends ModelData> extends TriggerField<String> {
private Dialog checkBoxListHolder;
private CheckBoxListView<D> listView;
private ListStore<D> store;
private String delimiter = ",";
private boolean readOnly;
public MultiSelectComboBox() {
store = new ListStore<D>();
listView = new CheckBoxListView<D>();
}
#Override
protected void onTriggerClick(ComponentEvent ce) {
super.onTriggerClick(ce);
checkBoxListHolder.setSize(getWidth(), 200);
listView.setWidth(getWidth());
checkBoxListHolder.setPosition(getAbsoluteLeft(),
getAbsoluteTop() + getHeight());
if(checkBoxListHolder.isVisible()) {
checkBoxListHolder.hide();
}
else {
checkBoxListHolder.show();
}
}
#Override
protected void onRender(Element target, int index) {
super.onRender(target, index);
checkBoxListHolder = new Dialog();
checkBoxListHolder.setClosable(false);
checkBoxListHolder.setHeaderVisible(false);
checkBoxListHolder.setFooter(false);
checkBoxListHolder.setFrame(false);
checkBoxListHolder.setResizable(false);
checkBoxListHolder.setAutoHide(false);
checkBoxListHolder.getButtonBar().setVisible(false);
checkBoxListHolder.setLayout(new FillLayout());
checkBoxListHolder.add(listView);
listView.setStore(store);
checkBoxListHolder.addWindowListener(new WindowListener(){
#Override
public void windowHide(WindowEvent we) {
setValue(parseCheckedValues(listView));
}
});
}
private String parseCheckedValues(CheckBoxListView<D> checkBoxView) {
StringBuffer buf = new StringBuffer();
if(checkBoxView != null) {
List<D> selected = checkBoxView.getChecked();
int index = 1, len = selected.size();
for(D c : selected) {
buf.append(c.get(listView.getDisplayProperty()));
if(index < len) {
buf.append(delimiter);
}
index++;
}
}
return buf.toString();
}
public CheckBoxListView<D> getListView() {
return listView;
}
public void setListView(CheckBoxListView<D> listView) {
this.listView = listView;
}
public ListStore<D> getStore() {
return store;
}
public void setStore(ListStore<D> store) {
this.store = store;
}
public String getDelimiter() {
return delimiter;
}
public void setDelimiter(String delimiter) {
this.delimiter = delimiter;
}
public boolean isReadOnly() {
return readOnly;
}
public void setReadOnly(boolean readOnly) {
this.readOnly = readOnly;
}
}
then use this class in my project:
// ...
ListStore<UserDTO> employeeList = getUsers();
MultiSelectComboBox<ModelData> multiUsers = new MultiSelectComboBox<ModelData>();
multiUsers.getListView().setDisplayProperty("label");
//multiUsers.setStore(employeeList);
multiUsers.getStore().add(getModelData());
multiUsers.setFieldLabel("Employee");
//multiUsers.setEditable(true);
//multiUsers.setMaxHeight(200);
simpleForm.add(multiUsers, formData);
// ...
private List<ModelData> getModelData() {
List<ModelData> list = new ArrayList<ModelData>();
List<NctrUserDTO> employees= employeeList.getModels();
for (int i=0; i<employeeList.getCount(); i++) {
ModelData data = new BaseModel();
data.set("label", employeeList.getAt(i).getName());
list.add(data);
}
return list;
}
but the comboBox appear empty or have not any values when i pass values from employeeList but when i tried with static string values this works fine, i dont know why this problem occur, any suggestion please ??

Answer 1

It sounds as if your looking for something like the option multiple select boxes, if so you can look up the source code on Github for pointers - or rather than re-inventing the wheel, just use that GwtBootstrap3 component