I want to add a div on TextBox, when textbox's value is empty, the div
will be show.
It look good, but it can't receive the event. the EventHandler does
not take effect.
What's the problem??
The code is:
----------------------------------------------------------------
public static HTML insertLabelUpon(final ValueBoxBase widget) {
final HTML label = new HTML();
label.setStyleName("PlugInLabel");
Element parent = widget.getElement().getParentElement();
if (parent == null) return null;
Element div = DOM.createDiv();
widget.removeFromParent();
parent.appendChild(div);
div.appendChild(widget.getElement());
div.appendChild(label.getElement());
div.getStyle().setProperty("position", "relative");
DOM.setStyleAttribute(label.getElement(), "position",
"absolute");
label.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
widget.setFocus(true);
}
});
widget.addFocusHandler(new FocusHandler() {
@Override
public void onFocus(FocusEvent event) {
label.setVisible(false);
}
});
widget.addBlurHandler(new BlurHandler() {
@Override
public void onBlur(BlurEvent event) {
Object value = widget.getValue();
if(value != null && value != "") {
label.setVisible(false);
} else {
label.setVisible(true);
}
}
});
return label;
}
----------------------------------------------------------------
the CSS:
----------------------------------------------------------------
.PlugInLabel {
position: absolute;
font: 11px tahoma,arial,verdana,sans-serif !important;
left: 5px !important;
color: #999999;
}
----------------------------------------------------------------
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