/*
* Copyright 2000-2016 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.v7.client.ui.form;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.ApplicationConnection;
import com.vaadin.client.ComponentConnector;
import com.vaadin.client.ConnectorHierarchyChangeEvent;
import com.vaadin.client.LayoutManager;
import com.vaadin.client.Paintable;
import com.vaadin.client.TooltipInfo;
import com.vaadin.client.UIDL;
import com.vaadin.client.VCaption;
import com.vaadin.client.ui.AbstractComponentContainerConnector;
import com.vaadin.client.ui.ShortcutActionHandler;
import com.vaadin.client.ui.layout.ElementResizeEvent;
import com.vaadin.client.ui.layout.ElementResizeListener;
import com.vaadin.client.ui.layout.MayScrollChildren;
import com.vaadin.shared.ui.ComponentStateUtil;
import com.vaadin.shared.ui.Connect;
import com.vaadin.v7.client.ui.VForm;
import com.vaadin.v7.shared.form.FormState;
import com.vaadin.v7.ui.Form;
@Connect(Form.class)
public class FormConnector extends AbstractComponentContainerConnector
implements Paintable, MayScrollChildren,
com.vaadin.v7.client.ComponentConnector {
private final ElementResizeListener footerResizeListener = new ElementResizeListener() {
@Override
public void onElementResize(ElementResizeEvent e) {
VForm form = getWidget();
LayoutManager lm = getLayoutManager();
int footerHeight = 0;
if (form.footer != null) {
footerHeight += lm.getOuterHeight(form.footer.getElement());
}
if (form.errorMessage.isVisible()) {
footerHeight += lm
.getOuterHeight(form.errorMessage.getElement());
footerHeight -= lm.getMarginTop(form.errorMessage.getElement());
form.errorMessage.getElement().getStyle()
.setMarginTop(-footerHeight, Unit.PX);
form.footerContainer.getStyle().clearMarginTop();
} else {
form.footerContainer.getStyle().setMarginTop(-footerHeight,
Unit.PX);
}
form.fieldContainer.getStyle().setPaddingBottom(footerHeight,
Unit.PX);
}
};
@Override
protected void init() {
getLayoutManager().addElementResizeListener(
getWidget().errorMessage.getElement(), footerResizeListener);
}
@Override
public void onUnregister() {
VForm form = getWidget();
getLayoutManager().removeElementResizeListener(
form.errorMessage.getElement(), footerResizeListener);
if (form.footer != null) {
getLayoutManager().removeElementResizeListener(
form.footer.getElement(), footerResizeListener);
}
}
@Override
public boolean delegateCaptionHandling() {
return false;
}
@Override
public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
getWidget().client = client;
getWidget().id = uidl.getId();
if (!isRealUpdate(uidl)) {
return;
}
boolean legendEmpty = true;
if (getState().caption != null) {
VCaption.setCaptionText(getWidget().caption, getState());
legendEmpty = false;
} else {
getWidget().caption.setInnerText("");
}
if (getWidget().icon != null) {
getWidget().legend.removeChild(getWidget().icon.getElement());
}
if (getIconUri() != null) {
getWidget().icon = client.getIcon(getIconUri());
getWidget().legend.insertFirst(getWidget().icon.getElement());
legendEmpty = false;
}
if (legendEmpty) {
getWidget().addStyleDependentName("nocaption");
} else {
getWidget().removeStyleDependentName("nocaption");
}
if (null != getState().errorMessage) {
getWidget().errorMessage.updateMessage(getState().errorMessage);
getWidget().errorMessage.setVisible(true);
} else {
getWidget().errorMessage.setVisible(false);
}
if (ComponentStateUtil.hasDescription(getState())) {
getWidget().desc.setInnerHTML(getState().description);
if (getWidget().desc.getParentElement() == null) {
getWidget().fieldSet.insertAfter(getWidget().desc,
getWidget().legend);
}
} else {
getWidget().desc.setInnerHTML("");
if (getWidget().desc.getParentElement() != null) {
getWidget().fieldSet.removeChild(getWidget().desc);
}
}
// also recalculates size of the footer if undefined size form - see
// #3710
client.runDescendentsLayout(getWidget());
// We may have actions attached
if (uidl.getChildCount() >= 1) {
UIDL childUidl = uidl.getChildByTagName("actions");
if (childUidl != null) {
if (getWidget().shortcutHandler == null) {
getWidget().shortcutHandler = new ShortcutActionHandler(
getConnectorId(), client);
getWidget().keyDownRegistration = getWidget()
.addDomHandler(getWidget(), KeyDownEvent.getType());
}
getWidget().shortcutHandler.updateActionMap(childUidl);
}
} else if (getWidget().shortcutHandler != null) {
getWidget().keyDownRegistration.removeHandler();
getWidget().shortcutHandler = null;
getWidget().keyDownRegistration = null;
}
}
@Override
public void updateCaption(ComponentConnector component) {
// NOP form don't render caption for neither field layout nor footer
// layout
}
@Override
public VForm getWidget() {
return (VForm) super.getWidget();
}
@Override
public boolean isReadOnly() {
// Class hierarchy has changed for FormConnector
return getState().readOnly || getState().propertyReadOnly;
}
@Override
public FormState getState() {
return (FormState) super.getState();
}
private ComponentConnector getFooter() {
return (ComponentConnector) getState().footer;
}
private ComponentConnector getLayout() {
return (ComponentConnector) getState().layout;
}
@Override
public void onConnectorHierarchyChange(
ConnectorHierarchyChangeEvent connectorHierarchyChangeEvent) {
Widget newFooterWidget = null;
ComponentConnector footer = getFooter();
if (footer != null) {
newFooterWidget = footer.getWidget();
Widget currentFooter = getWidget().footer;
if (currentFooter != null) {
// Remove old listener
getLayoutManager().removeElementResizeListener(
currentFooter.getElement(), footerResizeListener);
}
getLayoutManager().addElementResizeListener(
newFooterWidget.getElement(), footerResizeListener);
}
getWidget().setFooterWidget(newFooterWidget);
Widget newLayoutWidget = null;
ComponentConnector newLayout = getLayout();
if (newLayout != null) {
newLayoutWidget = newLayout.getWidget();
}
getWidget().setLayoutWidget(newLayoutWidget);
}
@Override
public TooltipInfo getTooltipInfo(Element element) {
// Form shows its description and error message
// as a part of the actual layout
return null;
}
@Override
public boolean hasTooltip() {
return false;
}
}