如何用原生GWT(Java)实现上下文菜单?
我是GWT的新手! 有人能帮我用GWT实现上下文菜单吗? 我见过一些例子,例如:如何用原生GWT(Java)实现上下文菜单?,java,gwt,contextmenu,Java,Gwt,Contextmenu,我是GWT的新手! 有人能帮我用GWT实现上下文菜单吗? 我见过一些例子,例如: MenuBar options = new MenuBar(true); MenuBar gwtPopup = new MenuBar(true); options.addItem("GWT", gwtPopup ); MenuItem entryPoint = new MenuItem(new SafeHtmlBuilder().appendEscaped("Ent
MenuBar options = new MenuBar(true);
MenuBar gwtPopup = new MenuBar(true);
options.addItem("GWT", gwtPopup );
MenuItem entryPoint = new MenuItem(new SafeHtmlBuilder().appendEscaped("EntryPoint").toSafeHtml());
entryPoint.setScheduledCommand(new ScheduledCommand()
{
public void execute()
{
Window.alert( "hello" );
}
} );
final DialogBox menuWrapper = new DialogBox( true );
menuWrapper.add( options );
gwtPopup.addItem( entryPoint );
Button showMenu = new Button( "Click me", new ClickHandler()
{
public void onClick( ClickEvent event )
{
menuWrapper.showRelativeTo( menuWrapper );
}
} );
RootPanel.get().add( showMenu );
但它不起作用。谢谢。刚刚在博客上为您介绍了使用我的工作代码完成这项工作的步骤 下面是该代码的基本部分
lable.sinkEvents(Event.ONCONTEXTMENU);
lable.addHandler(
new ContextMenuHandler() {
@Override
public void onContextMenu(ContextMenuEvent event) {
event.preventDefault();
event.stopPropagation();
popupMenu.setPopupPosition(
event.getNativeEvent().getClientX(),
event.getNativeEvent().getClientY());
popupMenu.show();
}
}, ContextMenuEvent.getType()
);
事件.getNativeEvent().getClientX()和事件.getNativeEvent().getClientY()在滚动页面后无法正常工作
以下是解决方案:
@Override
public void onContextMenu(ContextMenuEvent event) {
NativeEvent nativeEvent = event.getNativeEvent();
// stop the browser from opening the context menu
event.preventDefault();
event.stopPropagation();
int x = nativeEvent.getClientX() + getScrollLeft();
int y = nativeEvent.getClientY() + getScrollTop();
this.contextMenu.setPopupPosition(x, y);
this.contextMenu.show();
}
public static native int getScrollTop() /*-{
return $doc.body.scrollTop;
}-*/;
public static native int getScrollLeft() /*-{
return $doc.body.scrollLeft;
}-*/;
你必须更具体一些。什么不起作用?您希望它做什么?如果您定义代码中哪一位不起作用,这将是一件好事,另一件事是尝试使用PopupPanel而不是dialogJust Blog它为您:)