Hi all
I am trying to implement a CellTable with a custom Column Header which
displays a SearchBox (simple Textbox) below the normal Column Text for
searching purposes. Something like that:
| Header 1 | Header 2 |
| SEARCHBOX | SEARCHBOX |
-------------------------------------------------------
| ROW 1
------------------------------------------------------
| ROW 2
As soon as the user types in a character into the SearchBox a
RangeChangeEvent is fired which leads to a server requests and the CellTable
is updated with the new filtered list.
Basically everything works fine.
However as soon as the CellTable is refreshed (after typing in a character
into the searchbox) also the SearchBox loses its focus and the user has to
click with the mouse again into the SearchBox which is a little bit clumsy.
This is probably related to the fact that the render method of the custom
header and its cell is called after the CellTable refresh. Is there any way
how to set the focus back to the SearchBox? I tried to set tabindex=0 but it
didn't help.
The important code is in the SearchCell class. In override the
onBrowserEvent function and in the *keyup *part I set the boolean flag
isChanged = True. In the *blur *part I set it back to False. How can I check
this flag and set the focus on the SearchBox again?
*Custom Header Class:*
public static class SearchHeader extends Header<SearchTerm> {
@Override
public void render(Context context, SafeHtmlBuilder sb) {
super.render(context, sb);
}
private SearchTerm searchTerm;
public SearchHeader(SearchTerm searchTerm,ValueUpdater<SearchTerm>
valueUpdater) {
super(new SearchCell());
setUpdater(valueUpdater);
this.searchTerm = searchTerm;
}
@Override
public SearchTerm getValue() {
return searchTerm;
}
}
*Custom Search Cell (used in the custom Header)*
*
*
public static class SearchCell extends AbstractCell<SearchTerm> {
interface Template extends SafeHtmlTemplates {
@Template("<div style=\"\">{0}</div>")
SafeHtml header(String columnName);
@Template("<div style=\"\"><input type=\"text\"
value=\"{0}\"/></div>")
SafeHtml input(String value);
}
private static Template template;
private boolean isChanged = false;
public SearchCell() {
super("keydown","keyup","change","blur");
if (template == null) {
template = GWT.create(Template.class);
}
}
@Override
public void render(com.google.gwt.cell.client.Cell.Context context,
SearchTerm value, SafeHtmlBuilder sb) {
sb.append(template.header(value.getCriteria().toString()));
sb.append(template.input(value.getValue()));
}
@Override
public void onBrowserEvent(Context context,Element parent,
SearchTerm value,NativeEvent event,ValueUpdater<SearchTerm> valueUpdater) {
if (value == null)
return;
super.onBrowserEvent(context, parent, value, event,
valueUpdater);
if ("keyup".equals(event.getType()))
{
isChanged = true;
InputElement elem = getInputElement(parent);
value.setValue(elem.getValue());
if (valueUpdater != null)
valueUpdater.update(value);
}
else if ("blur".equals(event.getType())) {
isChanged =false;
}
}
protected InputElement getInputElement(Element parent) {
Element elem =
parent.getElementsByTagName("input").getItem(0);
assert(elem.getClass() == InputElement.class);
return elem.cast();
}
}
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