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- /*
- * Copyright 2000-2014 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;
-
- import java.util.Collections;
- import java.util.HashSet;
- import java.util.Iterator;
- import java.util.Set;
-
- import com.google.gwt.dom.client.Element;
- import com.google.gwt.event.dom.client.ClickEvent;
- import com.google.gwt.event.dom.client.ClickHandler;
- import com.google.gwt.event.dom.client.KeyCodes;
- import com.google.gwt.event.dom.client.KeyDownEvent;
- import com.google.gwt.event.dom.client.KeyDownHandler;
- import com.google.gwt.event.logical.shared.CloseEvent;
- import com.google.gwt.event.logical.shared.CloseHandler;
- import com.google.gwt.event.shared.HandlerRegistration;
- import com.google.gwt.user.client.DOM;
- import com.google.gwt.user.client.Event;
- import com.google.gwt.user.client.ui.Focusable;
- import com.google.gwt.user.client.ui.HTML;
- import com.google.gwt.user.client.ui.HasWidgets;
- import com.google.gwt.user.client.ui.Label;
- import com.google.gwt.user.client.ui.PopupPanel;
- import com.google.gwt.user.client.ui.RootPanel;
- import com.google.gwt.user.client.ui.Widget;
- import com.vaadin.client.ApplicationConnection;
- import com.vaadin.client.ComponentConnector;
- import com.vaadin.client.Util;
- import com.vaadin.client.VCaptionWrapper;
- import com.vaadin.client.VConsole;
- import com.vaadin.client.communication.StateChangeEvent;
- import com.vaadin.client.ui.ShortcutActionHandler.ShortcutActionHandlerOwner;
- import com.vaadin.client.ui.popupview.VisibilityChangeEvent;
- import com.vaadin.client.ui.popupview.VisibilityChangeHandler;
-
- public class VPopupView extends HTML implements Iterable<Widget> {
-
- public static final String CLASSNAME = "v-popupview";
-
- /**
- * For server-client communication.
- * <p>
- * For internal use only. May be removed or replaced in the future.
- */
- public String uidlId;
-
- /** For internal use only. May be removed or replaced in the future. */
- public ApplicationConnection client;
-
- /**
- * Helps to communicate popup visibility to the server.
- * <p>
- * For internal use only. May be removed or replaced in the future.
- */
- public boolean hostPopupVisible;
-
- /** For internal use only. May be removed or replaced in the future. */
- public final CustomPopup popup;
- private final Label loading = new Label();
-
- /**
- * loading constructor
- */
- public VPopupView() {
- super();
- popup = new CustomPopup();
-
- setStyleName(CLASSNAME);
- popup.setStyleName(CLASSNAME + "-popup");
- loading.setStyleName(CLASSNAME + "-loading");
-
- setHTML("");
- popup.setWidget(loading);
-
- // When we click to open the popup...
- addClickHandler(new ClickHandler() {
- @Override
- public void onClick(ClickEvent event) {
- preparePopup(popup);
- showPopup(popup);
- center();
- fireEvent(new VisibilityChangeEvent(true));
- }
- });
-
- // ..and when we close it
- popup.addCloseHandler(new CloseHandler<PopupPanel>() {
- @Override
- public void onClose(CloseEvent<PopupPanel> event) {
- fireEvent(new VisibilityChangeEvent(false));
- }
- });
-
- // TODO: Enable animations once GWT fix has been merged
- popup.setAnimationEnabled(false);
-
- popup.setAutoHideOnHistoryEventsEnabled(false);
- }
-
- /** For internal use only. May be removed or replaced in the future. */
- public void preparePopup(final CustomPopup popup) {
- popup.setVisible(true);
- popup.setWidget(loading);
- popup.show();
- }
-
- /**
- * Determines the correct position for a popup and displays the popup at
- * that position.
- *
- * By default, the popup is shown centered relative to its host component,
- * ensuring it is visible on the screen if possible.
- *
- * Can be overridden to customize the popup position.
- *
- * @param popup
- */
- public void showPopup(final CustomPopup popup) {
- popup.setPopupPosition(0, 0);
- }
-
- /** For internal use only. May be removed or replaced in the future. */
- public void center() {
- int windowTop = RootPanel.get().getAbsoluteTop();
- int windowLeft = RootPanel.get().getAbsoluteLeft();
- int windowRight = windowLeft + RootPanel.get().getOffsetWidth();
- int windowBottom = windowTop + RootPanel.get().getOffsetHeight();
-
- int offsetWidth = popup.getOffsetWidth();
- int offsetHeight = popup.getOffsetHeight();
-
- int hostHorizontalCenter = VPopupView.this.getAbsoluteLeft()
- + VPopupView.this.getOffsetWidth() / 2;
- int hostVerticalCenter = VPopupView.this.getAbsoluteTop()
- + VPopupView.this.getOffsetHeight() / 2;
-
- int left = hostHorizontalCenter - offsetWidth / 2;
- int top = hostVerticalCenter - offsetHeight / 2;
-
- // Don't show the popup outside the screen.
- if ((left + offsetWidth) > windowRight) {
- left -= (left + offsetWidth) - windowRight;
- }
-
- if ((top + offsetHeight) > windowBottom) {
- top -= (top + offsetHeight) - windowBottom;
- }
-
- if (left < 0) {
- left = 0;
- }
-
- if (top < 0) {
- top = 0;
- }
-
- popup.setPopupPosition(left, top);
- }
-
- /**
- * Make sure that we remove the popup when the main widget is removed.
- *
- * @see com.google.gwt.user.client.ui.Widget#onUnload()
- */
- @Override
- protected void onDetach() {
- popup.hide();
- super.onDetach();
- }
-
- private static native void nativeBlur(Element e)
- /*-{
- if(e && e.blur) {
- e.blur();
- }
- }-*/;
-
- /**
- * This class is only public to enable overriding showPopup, and is
- * currently not intended to be extended or otherwise used directly. Its API
- * (other than it being a VOverlay) is to be considered private and
- * potentially subject to change.
- */
- public class CustomPopup extends VOverlay implements
- StateChangeEvent.StateChangeHandler {
-
- private ComponentConnector popupComponentConnector = null;
-
- /** For internal use only. May be removed or replaced in the future. */
- public Widget popupComponentWidget = null;
-
- /** For internal use only. May be removed or replaced in the future. */
- public VCaptionWrapper captionWrapper = null;
-
- private boolean hasHadMouseOver = false;
- private boolean hideOnMouseOut = true;
- private final Set<Element> activeChildren = new HashSet<Element>();
-
- private ShortcutActionHandler shortcutActionHandler;
-
- public CustomPopup() {
- super(true, false, true); // autoHide, not modal, dropshadow
- setOwner(VPopupView.this);
- // Delegate popup keyboard events to the relevant handler. The
- // events do not propagate automatically because the popup is
- // directly attached to the RootPanel.
- addDomHandler(new KeyDownHandler() {
- @Override
- public void onKeyDown(KeyDownEvent event) {
- if (shortcutActionHandler != null) {
- shortcutActionHandler.handleKeyboardEvent(Event
- .as(event.getNativeEvent()));
- }
- }
- }, KeyDownEvent.getType());
- }
-
- // For some reason ONMOUSEOUT events are not always received, so we have
- // to use ONMOUSEMOVE that doesn't target the popup
- @Override
- public boolean onEventPreview(Event event) {
- Element target = DOM.eventGetTarget(event);
- boolean eventTargetsPopup = DOM.isOrHasChild(getElement(), target);
- int type = DOM.eventGetType(event);
-
- // Catch children that use keyboard, so we can unfocus them when
- // hiding
- if (eventTargetsPopup && type == Event.ONKEYPRESS) {
- activeChildren.add(target);
- }
-
- if (eventTargetsPopup && type == Event.ONMOUSEMOVE) {
- hasHadMouseOver = true;
- }
-
- if (!eventTargetsPopup && type == Event.ONMOUSEMOVE) {
- if (hasHadMouseOver && hideOnMouseOut) {
- hide();
- return true;
- }
- }
-
- // Was the TAB key released outside of our popup?
- if (!eventTargetsPopup && type == Event.ONKEYUP
- && event.getKeyCode() == KeyCodes.KEY_TAB) {
- // Should we hide on focus out (mouse out)?
- if (hideOnMouseOut) {
- hide();
- return true;
- }
- }
-
- return super.onEventPreview(event);
- }
-
- @Override
- public void hide(boolean autoClosed) {
- VConsole.log("Hiding popupview");
- syncChildren();
- clearPopupComponentConnector();
- hasHadMouseOver = false;
- shortcutActionHandler = null;
- super.hide(autoClosed);
- }
-
- @Override
- public void show() {
- // Find the shortcut action handler that should handle keyboard
- // events from the popup. The events do not propagate automatically
- // because the popup is directly attached to the RootPanel.
- Widget widget = VPopupView.this;
- while (shortcutActionHandler == null && widget != null) {
- if (widget instanceof ShortcutActionHandlerOwner) {
- shortcutActionHandler = ((ShortcutActionHandlerOwner) widget)
- .getShortcutActionHandler();
- }
- widget = widget.getParent();
- }
-
- super.show();
- }
-
- /**
- * Try to sync all known active child widgets to server
- */
- public void syncChildren() {
- // Notify children with focus
- if ((popupComponentWidget instanceof Focusable)) {
- ((Focusable) popupComponentWidget).setFocus(false);
- } else {
-
- checkForRTE(popupComponentWidget);
- }
-
- // Notify children that have used the keyboard
- for (Element e : activeChildren) {
- try {
- nativeBlur(e);
- } catch (Exception ignored) {
- }
- }
- activeChildren.clear();
- }
-
- private void checkForRTE(Widget popupComponentWidget2) {
- if (popupComponentWidget2 instanceof VRichTextArea) {
- ComponentConnector rtaConnector = Util
- .findConnectorFor(popupComponentWidget2);
- if (rtaConnector != null) {
- rtaConnector.flush();
- }
- } else if (popupComponentWidget2 instanceof HasWidgets) {
- HasWidgets hw = (HasWidgets) popupComponentWidget2;
- Iterator<Widget> iterator = hw.iterator();
- while (iterator.hasNext()) {
- checkForRTE(iterator.next());
- }
- }
- }
-
- private void clearPopupComponentConnector() {
- if (popupComponentConnector != null) {
- popupComponentConnector.removeStateChangeHandler(this);
- }
- popupComponentConnector = null;
- popupComponentWidget = null;
- captionWrapper = null;
- }
-
- @Override
- public boolean remove(Widget w) {
- clearPopupComponentConnector();
- return super.remove(w);
- }
-
- public void setPopupConnector(ComponentConnector newPopupComponent) {
-
- if (newPopupComponent != popupComponentConnector) {
- if (popupComponentConnector != null) {
- popupComponentConnector.removeStateChangeHandler(this);
- }
- Widget newWidget = newPopupComponent.getWidget();
- setWidget(newWidget);
- popupComponentWidget = newWidget;
- popupComponentConnector = newPopupComponent;
- popupComponentConnector.addStateChangeHandler("height", this);
- popupComponentConnector.addStateChangeHandler("width", this);
- }
-
- }
-
- public void setHideOnMouseOut(boolean hideOnMouseOut) {
- this.hideOnMouseOut = hideOnMouseOut;
- }
-
- @Override
- public com.google.gwt.user.client.Element getContainerElement() {
- return super.getContainerElement();
- }
-
- @Override
- public void onStateChanged(StateChangeEvent stateChangeEvent) {
- positionOrSizeUpdated();
- }
-
- }// class CustomPopup
-
- public HandlerRegistration addVisibilityChangeHandler(
- final VisibilityChangeHandler visibilityChangeHandler) {
- return addHandler(visibilityChangeHandler,
- VisibilityChangeEvent.getType());
- }
-
- @Override
- public Iterator<Widget> iterator() {
- return Collections.singleton((Widget) popup).iterator();
- }
-
- }// class VPopupView
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