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 [Java Open Source]GWT做的鼠标over事件
软件技术
lhwork 发表于 2006/8/2 11:22:03 |
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用过gwt的都知道，对一个按钮button做点击事件很简单，但要做鼠标事件，比如over，up，leave就没办法了，但extends Button就能做到，以下就是这个例子：我自己写的500)this.width=500'>package mypack.client;500)this.width=500'>500)this.width=500'>import com.google.gwt.core.client.EntryPoint;500)this.width=500'>import com.google.gwt.user.client.DOM;500)this.width=500'>import com.google.gwt.user.client.Event;500)this.width=500'>import com.google.gwt.user.client.ui.Button;500)this.width=500'>import com.google.gwt.user.client.ui.ClickListener;500)this.width=500'>import com.google.gwt.user.client.ui.ClickListenerCollection;500)this.width=500'>import com.google.gwt.user.client.ui.Label;500)this.width=500'>import com.google.gwt.user.client.ui.LoadListener;500)this.width=500'>import com.google.gwt.user.client.ui.LoadListenerCollection;500)this.width=500'>import com.google.gwt.user.client.ui.MouseListener;500)this.width=500'>import com.google.gwt.user.client.ui.MouseListenerCollection;500)this.width=500'>import com.google.gwt.user.client.ui.RootPanel;500)this.width=500'>import com.google.gwt.user.client.ui.SourcesClickEvents;500)this.width=500'>import com.google.gwt.user.client.ui.SourcesLoadEvents;500)this.width=500'>import com.google.gwt.user.client.ui.SourcesMouseEvents;500)this.width=500'>import com.google.gwt.user.client.ui.Widget;500)this.width=500'>500)this.width=500'>500)this.width=500'>/** *//**500)this.width=500'> * Entry point classes define <code>onModuleLoad()</code>.500)this.width=500'> */500)this.width=500'>500)this.width=500'>public class MouseTest implements EntryPoint 500)this.width=500'>{500)this.width=500'>500)this.width=500'>500)this.width=500'> /** *//**500)this.width=500'> * This is the entry point method.500)this.width=500'> */500)this.width=500'>500)this.width=500'> public void onModuleLoad() 500)this.width=500'>{500)this.width=500'> final MyButton button = new MyButton("Super Button");500)this.width=500'> final Label label = new Label();500)this.width=500'>500)this.width=500'>500)this.width=500'> button.addMouseListener(new MouseListener() 500)this.width=500'>{500)this.width=500'>500)this.width=500'>500)this.width=500'> public void onMouseDown(Widget sender, int x, int y) 500)this.width=500'>{500)this.width=500'> // TODO Auto-generated method stub500)this.width=500'>500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void onMouseEnter(Widget sender) 500)this.width=500'>{500)this.width=500'> // TODO Auto-generated method stub500)this.width=500'>500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void onMouseLeave(Widget sender) 500)this.width=500'>{500)this.width=500'> // TODO Auto-generated method stub500)this.width=500'>500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void onMouseMove(Widget sender, int x, int y) 500)this.width=500'>{500)this.width=500'> label.setText("Hello World!");500)this.width=500'>500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void onMouseUp(Widget sender, int x, int y) 500)this.width=500'>{500)this.width=500'>500)this.width=500'> }500)this.width=500'> });500)this.width=500'>500)this.width=500'> // Assume that the host HTML has elements defined whose500)this.width=500'> // IDs are "slot1", "slot2". In a real app, you probably would not want500)this.width=500'> // to hard-code IDs. Instead, you could, for example, search for all500)this.width=500'> // elements with a particular CSS class and replace them with widgets.500)this.width=500'> //500)this.width=500'> RootPanel.get("slot1").add(button);500)this.width=500'> RootPanel.get("slot2").add(label);500)this.width=500'> }500)this.width=500'>}500)this.width=500'>500)this.width=500'>class MyButton extends Button implements SourcesClickEvents,500)this.width=500'>500)this.width=500'> SourcesMouseEvents, SourcesLoadEvents 500)this.width=500'>{500)this.width=500'>500)this.width=500'> public MyButton(String text)500)this.width=500'>{500)this.width=500'> super(text);500)this.width=500'> sinkEvents(Event.ONCLICK | Event.MOUSEEVENTS | Event.ONLOAD | Event.ONERROR);500)this.width=500'> }500)this.width=500'> 500)this.width=500'> private ClickListenerCollection clickListeners;500)this.width=500'>500)this.width=500'> private LoadListenerCollection loadListeners;500)this.width=500'>500)this.width=500'> private MouseListenerCollection mouseListeners;500)this.width=500'>500)this.width=500'>500)this.width=500'> public void addClickListener(ClickListener listener) 500)this.width=500'>{500)this.width=500'> if (clickListeners == null)500)this.width=500'> clickListeners = new ClickListenerCollection();500)this.width=500'> clickListeners.add(listener);500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void addLoadListener(LoadListener listener) 500)this.width=500'>{500)this.width=500'> if (loadListeners == null)500)this.width=500'> loadListeners = new LoadListenerCollection();500)this.width=500'> loadListeners.add(listener);500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void addMouseListener(MouseListener listener) 500)this.width=500'>{500)this.width=500'> if (mouseListeners == null)500)this.width=500'> mouseListeners = new MouseListenerCollection();500)this.width=500'> mouseListeners.add(listener);500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void onBrowserEvent(Event event) 500)this.width=500'>{500)this.width=500'>500)this.width=500'> switch (DOM.eventGetType(event)) 500)this.width=500'>{500)this.width=500'>500)this.width=500'> case Event.ONCLICK: 500)this.width=500'>{500)this.width=500'> if (clickListeners != null)500)this.width=500'> clickListeners.fireClick(this);500)this.width=500'> break;500)this.width=500'> }500)this.width=500'> case Event.ONMOUSEDOWN:500)this.width=500'> case Event.ONMOUSEUP:500)this.width=500'> case Event.ONMOUSEMOVE:500)this.width=500'> case Event.ONMOUSEOVER:500)this.width=500'>500)this.width=500'> case Event.ONMOUSEOUT: 500)this.width=500'>{500)this.width=500'> if (mouseListeners != null)500)this.width=500'> mouseListeners.fireMouseEvent(this, event);500)this.width=500'> break;500)this.width=500'> }500)this.width=500'>500)this.width=500'> case Event.ONLOAD: 500)this.width=500'>{500)this.width=500'> if (loadListeners != null)500)this.width=500'> loadListeners.fireLoad(this);500)this.width=500'> break;500)this.width=500'> }500)this.width=500'>500)this.width=500'> case Event.ONERROR: 500)this.width=500'>{500)this.width=500'> if (loadListeners != null)500)this.width=500'> loadListeners.fireError(this);500)this.width=500'> break;500)this.width=500'> }500)this.width=500'> }500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void removeClickListener(ClickListener listener) 500)this.width=500'>{500)this.width=500'> if (clickListeners != null)500)this.width=500'> clickListeners.remove(listener);500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void removeLoadListener(LoadListener listener) 500)this.width=500'>{500)this.width=500'> if (loadListeners != null)500)this.width=500'> loadListeners.remove(listener);500)this.width=500'> }500)this.width=500'>500)this.width=500'>500)this.width=500'> public void removeMouseListener(MouseListener listener) 500)this.width=500'>{500)this.width=500'> if (mouseListeners != null)500)this.width=500'> mouseListeners.remove(listener);500)this.width=500'> }500)this.width=500'>}500)this.width=500'> |
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