cn.mapway.ui.client.widget.MapwayButton Maven / Gradle / Ivy
package cn.mapway.ui.client.widget;
import com.google.gwt.dom.client.ButtonElement;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.annotations.IsSafeHtml;
import com.google.gwt.user.client.ui.ButtonBase;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
/**
* Button widget.
*
* @author zhangjianshe
*/
public class MapwayButton extends ButtonBase {
/**
* Creates a Button widget that wraps an existing <button> element.
*
* This element must already be attached to the document. If the element is
* removed from the document, you must call
* {@link RootPanel#detachNow(Widget)}.
*
* @param element the element to be wrapped
* @return the mapway button
*/
public static MapwayButton wrap(com.google.gwt.dom.client.Element element) {
// Assert that the element is attached.
assert Document.get().getBody().isOrHasChild(element);
MapwayButton button = new MapwayButton(element);
// Mark it attached and remember it for cleanup.
button.onAttach();
RootPanel.detachOnWindowClose(button);
return button;
}
/**
* Creates a button with no caption.
*/
public MapwayButton() {
super(Document.get().createPushButtonElement());
setStyleName("mapway-Button");
}
/**
* Creates a button with the given HTML caption.
*
* @param html the HTML caption
*/
public MapwayButton(SafeHtml html) {
this(html.asString());
}
/**
* Creates a button with the given HTML caption.
*
* @param html the HTML caption
*/
public MapwayButton(@IsSafeHtml String html) {
this();
setHTML(html);
}
/**
* Creates a button with the given HTML caption and click listener.
*
* @param html the html caption
* @param handler the click handler
*/
public MapwayButton(SafeHtml html, ClickHandler handler) {
this(html.asString(), handler);
}
/**
* Creates a button with the given HTML caption and click listener.
*
* @param html the HTML caption
* @param handler the click handler
*/
public MapwayButton(@IsSafeHtml String html, ClickHandler handler) {
this(html);
addClickHandler(handler);
}
/**
* This constructor may be used by subclasses to explicitly use an existing
* element. This element must be a <button> element.
*
* @param element the element to be used
*/
protected MapwayButton(com.google.gwt.dom.client.Element element) {
super(element.cast());
ButtonElement.as(element);
}
/**
* Programmatic equivalent of the user clicking the button.
*/
public void click() {
getButtonElement().click();
}
/**
* Get the underlying button element.
*
* @return the {@link ButtonElement}
*/
protected ButtonElement getButtonElement() {
return getElement().cast();
}
}