I can't figure out why the "change" event doesn't fire in my custom
selection cell, below is the code. The focus and blur events fire. Also, if
I change to super("click") the click event will fire but no matter what I
try I can not get the "change" event to fire. I add the option items
dynamically using the addOption(String newOp) method. For the selection
model in my data grid I have :
final SelectionModel<IssueBean> selectionModel = new
MultiSelectionModel<IssueBean>(keyProvider);
dataGrid.setSelectionModel(selectionModel,
DefaultSelectionEventManager.<IssueBean> createCheckboxManager());
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.google.gwt.cell.client.AbstractInputCell;
import com.google.gwt.cell.client.ValueUpdater;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.BrowserEvents;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.dom.client.SelectElement;
import com.google.gwt.safehtml.client.SafeHtmlTemplates;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.Window;
public class IssueCatagorySelectionCell extends AbstractInputCell<String,
String> {
interface Template extends SafeHtmlTemplates {
@Template("<option value=\"{0}\">{0}</option>")
SafeHtml deselected(String option);
@Template("<option value=\"{0}\"
selected=\"selected\">{0}</option>")
SafeHtml selected(String option);
}
private static Template template;
private HashMap<String, Integer> indexForOption = new HashMap<String,
Integer>();
private final List<String> options;
public IssueCatagorySelectionCell() {
super(BrowserEvents.CHANGE);
if (template == null) {
template = GWT.create(Template.class);
}
this.options = new ArrayList<String>();
}
public void addOption(String newOp){
String option = new String(newOp);
options.add(option);
refreshIndexes();
}
public void removeOption(String op){
String option = new String(op);
options.remove(indexForOption.get(option));
refreshIndexes();
}
public void removeAll() {
options.clear();
refreshIndexes();
}
private void refreshIndexes(){
int index = 0;
for (String option : options) {
indexForOption.put(option, index++);
}
}
@Override
public void onBrowserEvent(Context context, Element parent, String
value, NativeEvent event, ValueUpdater<String> valueUpdater) {
super.onBrowserEvent(context, parent, value, event, valueUpdater);
String type = event.getType();
Window.alert("event type = " + type);
if ("change".equals(type)) {
Object key = context.getKey();
SelectElement select = parent.getFirstChild().cast();
String newValue = options.get(select.getSelectedIndex());
Window.alert("newValue = " + newValue);
setViewData(key, newValue);
finishEditing(parent, newValue, key, valueUpdater);
if (valueUpdater != null) {
valueUpdater.update(newValue);
}
}
}
@Override
public void render(com.google.gwt.cell.client.Cell.Context context,
String value, SafeHtmlBuilder sb) {
// Get the view data.
Object key = context.getKey();
String viewData = getViewData(key);
if (viewData != null && viewData.equals(value)) {
clearViewData(key);
viewData = null;
}
int selectedIndex = getSelectedIndex(viewData == null ? value :
viewData);
sb.appendHtmlConstant("<select tabindex=\"-1\">");
int index = 0;
for (String option : options) {
if (index++ == selectedIndex) {
sb.append(template.selected(option));
} else {
sb.append(template.deselected(option));
}
}
sb.appendHtmlConstant("</select>");
}
private int getSelectedIndex(String value) {
Window.alert("getSelectedIndex");
Integer index = indexForOption.get(value);
if (index == null) {
return -1;
}
return index.intValue();
}
}
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