本文参考:http://groups.google.com/group/Google-Web-Toolkit/browse_thread
/thread/7ed0d179b89fa062/aaeb5391a760adef?lnk=gst&q=indicator+AsyncCallback&rnum=1#aaeb5391a760adef
大部分代码也是参考文中的。
- package com.javaeye.dengyin2000.truck.client.server;
-
- import com.google.gwt.user.client.Window;
- import com.google.gwt.user.client.rpc.AsyncCallback;
-
- public abstract class AsyncCallbackWithStatus implements AsyncCallback {
- private static LoadingIndicator loadingIndicator;
-
- public static final void setLoadingIndicator(LoadingIndicator indicator) {
- loadingIndicator = indicator;
- }
-
- public AsyncCallbackWithStatus() {
- setLoading(true);
- }
-
- public final void onSuccess(Object object) {
- setLoading(false);
- onSuccessInternal(object);
- }
-
- public final void onFailure(Throwable throwable) {
- setLoading(false);
- onFailureInternal(throwable);
- }
-
- protected abstract void onSuccessInternal(Object object);
-
- protected void onFailureInternal(Throwable throwable){
- Window.alert("服务器没有响应,请稍后再试!");
- }
-
- private void setLoading(boolean isLoading) {
- if (null != loadingIndicator) {
- if (isLoading) {
- loadingIndicator.show();
- } else {
- loadingIndicator.hide();
- }
- }
- }
-
- interface LoadingIndicator {
- void show();
-
- void hide();
- }
-
- }
package com.javaeye.dengyin2000.truck.client.server;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
public abstract class AsyncCallbackWithStatus implements AsyncCallback {
private static LoadingIndicator loadingIndicator;
public static final void setLoadingIndicator(LoadingIndicator indicator) {
loadingIndicator = indicator;
}
public AsyncCallbackWithStatus() {
setLoading(true);
}
public final void onSuccess(Object object) {
setLoading(false);
onSuccessInternal(object);
}
public final void onFailure(Throwable throwable) {
setLoading(false);
onFailureInternal(throwable);
}
protected abstract void onSuccessInternal(Object object);
protected void onFailureInternal(Throwable throwable){
Window.alert("服务器没有响应,请稍后再试!");
}
private void setLoading(boolean isLoading) {
if (null != loadingIndicator) {
if (isLoading) {
loadingIndicator.show();
} else {
loadingIndicator.hide();
}
}
}
interface LoadingIndicator {
void show();
void hide();
}
}
- package com.javaeye.dengyin2000.truck.client.server;
-
- import com.google.gwt.user.client.Window;
- import com.google.gwt.user.client.WindowResizeListener;
- import com.google.gwt.user.client.ui.HTML;
- import com.google.gwt.user.client.ui.PopupPanel;
- import com.javaeye.dengyin2000.truck.client.server.AsyncCallbackWithStatus.LoadingIndicator;
-
- public class LoadingStatus implements LoadingIndicator, WindowResizeListener {
- private PopupPanel popup;
-
- public LoadingStatus() {
- popup = new PopupPanel();
- popup.add(new HTML("<div style='background-color: red;'> Loading, please wait...</div>"));
- placeIndicator();
- Window.addWindowResizeListener(this);
- // set the style name for greater control over the
- }
-
- public void show() {
- popup.show();
- }
-
- public void hide() {
- popup.hide();
- }
-
- private void placeIndicator(){
- popup.setPopupPosition(Window.getClientWidth() - 120, 10);
- }
-
- public void onWindowResized(int width, int height) {
- placeIndicator();
- }
-
- }
package com.javaeye.dengyin2000.truck.client.server;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.WindowResizeListener;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.PopupPanel;
import com.javaeye.dengyin2000.truck.client.server.AsyncCallbackWithStatus.LoadingIndicator;
public class LoadingStatus implements LoadingIndicator, WindowResizeListener {
private PopupPanel popup;
public LoadingStatus() {
popup = new PopupPanel();
popup.add(new HTML("<div style='background-color: red;'> Loading, please wait...</div>"));
placeIndicator();
Window.addWindowResizeListener(this);
// set the style name for greater control over the
}
public void show() {
popup.show();
}
public void hide() {
popup.hide();
}
private void placeIndicator(){
popup.setPopupPosition(Window.getClientWidth() - 120, 10);
}
public void onWindowResized(int width, int height) {
placeIndicator();
}
}
在你的EntryPoint中装配好你的indicator
- private void prepareLoadingIndicator(){
- LoadingStatus status = new LoadingStatus();
- AsyncCallbackWithStatus.setLoadingIndicator(status);
- }
private void prepareLoadingIndicator(){
LoadingStatus status = new LoadingStatus();
AsyncCallbackWithStatus.setLoadingIndicator(status);
}
这样调用。
- private void populateAndReadEnterprisesInfo(){
- GWTRPCServiceLocator.getUserService().getEnterprisesInfo(new AsyncCallbackWithStatus(){
-
- protected void onSuccessInternal(Object object) {
- EnterprisesInfoGTO gto = (EnterprisesInfoGTO) object;
- enterpriseName.setText(gto.getEnterprisesName());
- contactName.setText(gto.getContactName());
- contactTel.setText(gto.getContactTel());
- contactFax.setText(gto.getContactFax());
- contactAddress.setText(gto.getContactAddress());
- zipCode.setText(gto.getZipCode());
- email.setText(gto.getEmail());
- siteAddress.setText(gto.getSiteAddress());
- }
-
- });
- }