Java tutorial
/* * Copyright 2000-2018 Vaadin Ltd. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */ package com.vaadin.client.ui.tabsheet; import com.google.gwt.dom.client.Element; import com.google.gwt.dom.client.Style.Overflow; import com.vaadin.client.ComponentConnector; import com.vaadin.client.ConnectorHierarchyChangeEvent; import com.vaadin.client.TooltipInfo; import com.vaadin.client.WidgetUtil; import com.vaadin.client.communication.StateChangeEvent; import com.vaadin.client.ui.SimpleManagedLayout; import com.vaadin.client.ui.VTabsheet; import com.vaadin.client.ui.layout.MayScrollChildren; import com.vaadin.shared.ui.Connect; import com.vaadin.shared.ui.tabsheet.TabsheetClientRpc; import com.vaadin.ui.TabSheet; @Connect(TabSheet.class) public class TabsheetConnector extends TabsheetBaseConnector implements SimpleManagedLayout, MayScrollChildren { public TabsheetConnector() { registerRpc(TabsheetClientRpc.class, () -> { for (int i = 0; i < getState().tabs.size(); ++i) { final String key = getState().tabs.get(i).key; final boolean selected = key.equals(getState().selected); if (selected) { getWidget().waitingForResponse = false; getWidget().setActiveTabIndex(i); getWidget().selectTab(i); break; } } renderContent(); }); } @Override protected void init() { super.init(); getWidget().setConnector(this); } /* * (non-Javadoc) * * @see * com.vaadin.client.ui.AbstractComponentConnector#onStateChanged(com.vaadin * .client.communication.StateChangeEvent) */ @Override public void onStateChanged(StateChangeEvent stateChangeEvent) { super.onStateChanged(stateChangeEvent); getWidget().handleStyleNames(getState()); if (getState().tabsVisible) { getWidget().showTabs(); } else { getWidget().hideTabs(); } // tabs; push or not if (!isUndefinedWidth()) { getWidget().tabs.getStyle().setOverflow(Overflow.HIDDEN); } else { getWidget().showAllTabs(); getWidget().tabs.getStyle().clearWidth(); getWidget().tabs.getStyle().setOverflow(Overflow.VISIBLE); getWidget().updateDynamicWidth(); } if (!isUndefinedHeight()) { // Must update height after the styles have been set getWidget().updateContentNodeHeight(); getWidget().updateOpenTabSize(); } getWidget().iLayout(); } @Override public VTabsheet getWidget() { return (VTabsheet) super.getWidget(); } @Override public void updateCaption(ComponentConnector component) { /* Tabsheet does not render its children's captions */ } @Override public void layout() { VTabsheet tabsheet = getWidget(); tabsheet.updateContentNodeHeight(); if (isUndefinedWidth()) { tabsheet.contentNode.getStyle().setProperty("width", ""); } else { int contentWidth = tabsheet.getOffsetWidth() - tabsheet.getContentAreaBorderWidth(); if (contentWidth < 0) { contentWidth = 0; } tabsheet.contentNode.getStyle().setProperty("width", contentWidth + "px"); } tabsheet.updateOpenTabSize(); if (isUndefinedWidth()) { tabsheet.updateDynamicWidth(); } tabsheet.iLayout(); } @Override public TooltipInfo getTooltipInfo(Element element) { TooltipInfo info = null; // Find a tooltip for the tab, if the element is a tab if (element != getWidget().getElement()) { Object node = WidgetUtil.findWidget(element, VTabsheet.TabCaption.class); if (node != null) { VTabsheet.TabCaption caption = (VTabsheet.TabCaption) node; info = caption.getTooltipInfo(); } } // If not tab tooltip was found, use the default if (info == null) { info = super.getTooltipInfo(element); } return info; } @Override public boolean hasTooltip() { /* * Tab tooltips are not processed until updateFromUIDL, so we can't be * sure that there are no tooltips during onStateChange when this method * is used. */ return true; } @Override public void onConnectorHierarchyChange(ConnectorHierarchyChangeEvent connector) { renderContent(); } /** * (Re-)render the content of the active tab. */ protected void renderContent() { ComponentConnector contentConnector = null; if (!getChildComponents().isEmpty()) { contentConnector = getChildComponents().get(0); } if (null != contentConnector) { getWidget().renderContent(contentConnector.getWidget()); } else { getWidget().renderContent(null); } } }