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OpenCms is an enterprise-ready, easy to use website content management system based on Java and XML technology. Offering a complete set of features, OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.

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/*
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (C) Alkacon Software (http://www.alkacon.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * For further information about Alkacon Software, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.opencms.ade.containerpage.client.ui;

import org.opencms.ade.containerpage.client.ui.css.I_CmsLayoutBundle;
import org.opencms.ade.containerpage.shared.rpc.I_CmsContainerpageServiceAsync;
import org.opencms.gwt.client.rpc.CmsRpcAction;
import org.opencms.gwt.client.util.CmsPositionBean;
import org.opencms.gwt.client.util.CmsStyleVariable;

import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;

/** 
 * This class is responsible for managing the visibility of edit points on small elements.

*/ public class CmsSmallElementsHandler { /** The height necessary for a container page element. */ public static int NECESSARY_HEIGHT = 24; /** True if currently small elements are editable. */ boolean m_editing; /** The container page service instance. */ I_CmsContainerpageServiceAsync m_service; /** True if any small elements have been detected. */ private boolean m_hasSmallElements; /** The style variable for the display mode for small elements. */ private CmsStyleVariable m_smallElementsStyle; /** * Creates a new small elements handler.

* * @param service */ public CmsSmallElementsHandler(I_CmsContainerpageServiceAsync service) { m_smallElementsStyle = new CmsStyleVariable(RootPanel.get()); m_service = service; } /** * Returns the necessary height as a CSS height string in pixels.

* * @return the necessary height as a CSS string */ public static String getNecessaryHeight() { return NECESSARY_HEIGHT + "px !important"; } /** * Checks if a given widget counts as 'small'.

* * @param widget the widget to check * * @return true if the widget is small */ public static boolean isSmall(Widget widget) { assert widget.isAttached(); return (CmsPositionBean.generatePositionInfo(widget.getElement()).getHeight() < NECESSARY_HEIGHT) && (CmsPositionBean.getInnerDimensions(widget.getElement()).getHeight() < NECESSARY_HEIGHT); } /** * Returns true if currently small elements are editable.

* * @return true if small elements are editable */ public boolean areSmallElementsEditable() { return m_editing; } /** * Returns true if any small elements are present.

* * @return true if any small elements are present */ public boolean hasSmallElements() { return m_hasSmallElements; } /** * Prepares a small element.

* * @param widget the small element */ public void prepareSmallElement(Widget widget) { m_hasSmallElements = true; widget.addStyleName(org.opencms.ade.containerpage.client.ui.css.I_CmsLayoutBundle.INSTANCE.containerpageCss().smallElement()); } /** * Enables or disables editing for small elements and optionally saves the setting.

* * @param editable if true, enables editing for small elements * @param save true if the setting should be saved */ public void setEditSmallElements(final boolean editable, boolean save) { if (save) { CmsRpcAction action = new CmsRpcAction() { @Override public void execute() { start(200, false); internalSetEditSmallElements(editable); m_service.setEditSmallElements(editable, this); } @Override protected void onResponse(Void result) { stop(false); m_editing = editable; } }; action.execute(); } else { internalSetEditSmallElements(editable); m_editing = editable; } } /** * Sets the mode for displaying small elements.

* * @param editable if true, small elements will be enlarged and their edit buttons shown; if false, the edit buttons will be hidden */ protected void internalSetEditSmallElements(boolean editable) { String newClass = editable ? I_CmsLayoutBundle.INSTANCE.containerpageCss().enlargeSmallElements() : I_CmsLayoutBundle.INSTANCE.containerpageCss().ignoreSmallElements(); m_smallElementsStyle.setValue(newClass); } }





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