本文整理汇总了Java中com.vaadin.annotations.PreserveOnRefresh类的典型用法代码示例。如果您正苦于以下问题：Java PreserveOnRefresh类的具体用法？Java PreserveOnRefresh怎么用？Java PreserveOnRefresh使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
PreserveOnRefresh类属于com.vaadin.annotations包，在下文中一共展示了PreserveOnRefresh类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: modifyBootstrapPage
import com.vaadin.annotations.PreserveOnRefresh; //导入依赖的package包/类
@Override
public void modifyBootstrapPage(BootstrapPageResponse response) {
Document document = response.getDocument();
Element head = document.getElementsByTag("head").get(0);
Element element;
if (isWebAppCapable()) {
element = document.createElement("meta");
element.attr("name", "apple-mobile-web-app-capable");
element.attr("content", "yes");
head.appendChild(element);
}
if (getStatusBarStyle() != null) {
element = document.createElement("meta");
element.attr("name", "apple-mobile-web-app-status-bar-style");
element.attr("content", getStatusBarStyle());
head.appendChild(element);
}
if (getStartupImage() != null) {
element = document.createElement("link");
element.attr("rel", "apple-touch-startup-image");
element.attr("href", getStartupImage());
head.appendChild(element);
}
/*
* Ensure window has "stable name", in case PreserveOnRefresh is used.
* This is to fool vaadinBootstrap.js so that for example applications
* used as ios "home screen webapps", can preserve their state among app
* switches, like following links (with browser) and then returning back
* to app.
*/
if (response.getUiClass().getAnnotation(PreserveOnRefresh.class) != null) {
element = document.createElement("script");
element.attr("type", "text/javascript");
element.appendText("\nwindow.name = '"
+ response.getUiClass().hashCode() + "';\n");
head.appendChild(element);
}
}
示例2: isPersistentSessionCookie
import com.vaadin.annotations.PreserveOnRefresh; //导入依赖的package包/类
/**
* Vaadin uses the servlet's session mechanism to track users. With its
* default settings, all sessions will be discarded when the browser
* application closes. For mobile web applications (such as web apps that
* are added to the home screen in iOS) this might not be the desired
* solution.
* <p>
* The persistent session cookie is on by default if the UI uses the
* {@link PreserveOnRefresh} annotation.
*
* @return true if the session cookie will be made persistent when closing
* the browser application
*/
public boolean isPersistentSessionCookie() {
if (persistentSessionCookie != null) {
return persistentSessionCookie;
} else {
UI ui = getUI();
if (ui != null
&& ui.getClass().getAnnotation(PreserveOnRefresh.class) != null) {
return true;
}
}
return false;
}