cc.kune.bootstrap.client.actions.ui.PopupBSMenuGui.java Source code

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Here is the source code for cc.kune.bootstrap.client.actions.ui.PopupBSMenuGui.java

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/*
 *
 * Copyright (C) 2007-2015 Licensed to the Comunes Association (CA) under
 * one or more contributor license agreements (see COPYRIGHT for details).
 * The CA licenses this file to you under the GNU Affero General Public
 * License version 3, (the "License"); you may not use this file except in
 * compliance with the License. This file is part of kune.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package cc.kune.bootstrap.client.actions.ui;

import cc.kune.common.client.actions.PropertyChangeEvent;
import cc.kune.common.client.actions.PropertyChangeListener;
import cc.kune.common.client.actions.ui.descrip.GuiActionDescrip;
import cc.kune.common.client.actions.ui.descrip.MenuDescriptor;
import cc.kune.common.client.actions.ui.descrip.Position;
import cc.kune.common.client.tooltip.Tooltip;

import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.PopupPanel.PositionCallback;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.UIObject;

public class PopupBSMenuGui {

    private final GuiActionDescrip descriptor;
    private PopupPanel popup;
    protected IsWidget popupContent;
    private final IsWidget relativeTo;

    public PopupBSMenuGui(final IsWidget content, final IsWidget relativeTo, final GuiActionDescrip descriptor) {
        this.popupContent = content;
        this.relativeTo = relativeTo;
        this.descriptor = descriptor;
        descriptor.addPropertyChangeListener(new PropertyChangeListener() {
            @Override
            public void propertyChange(final PropertyChangeEvent event) {
                if (event.getPropertyName().equals(MenuDescriptor.MENU_HIDE)) {
                    if (popup != null && popup.isShowing()) {
                        popup.hide();
                    }
                } else if (event.getPropertyName().equals(MenuDescriptor.MENU_SHOW)) {
                    show();
                }
            }
        });
    }

    /**
     * Creates the popup that includes the menu.
     *
     * @return the popup panel
     */
    private PopupPanel createPopup() {
        popup = new PopupPanel(true);
        popup.setStyleName("oc-menu");
        popup.add(popupContent);
        SmartMenuUtils.init(popup.getElement());
        popup.addCloseHandler(new CloseHandler<PopupPanel>() {
            @Override
            public void onClose(final CloseEvent<PopupPanel> event) {
                descriptor.putValue(MenuDescriptor.MENU_ONHIDE, popup);
            }
        });
        return popup;
    }

    private void createPopupIfNecessary() {
        if (popup == null) {
            createPopup();
        }
    }

    public void hide() {
        createPopupIfNecessary();
        popup.hide();
    }

    public boolean isShowing() {
        return isShowing();
    }

    public void show() {
        createPopupIfNecessary();
        final Object pos = descriptor.getValue(MenuDescriptor.MENU_SHOW_NEAR_TO);
        if (pos != null) {
            showRelativeTo(pos);
        } else {
            showRelativeTo(relativeTo);
        }
    }

    public void showRelativeTo(final Object relative) {
        createPopupIfNecessary();
        if (relative instanceof String) {
            popup.showRelativeTo(RootPanel.get((String) relative));
        } else if (relative instanceof UIObject) {
            final Boolean atRight = ((Boolean) descriptor.getValue(MenuDescriptor.MENU_ATRIGHT));
            if (atRight) {
                popup.setPopupPositionAndShow(new PositionCallback() {
                    @Override
                    public void setPosition(final int offsetWidth, final int offsetHeight) {
                        final UIObject obj = (UIObject) relative;
                        popup.setPopupPosition(obj.getAbsoluteLeft() + obj.getOffsetWidth(),
                                obj.getAbsoluteTop() + 30);
                    }
                });
            } else {
                popup.showRelativeTo((UIObject) relative);
            }
        } else if (relative instanceof Position) {
            popup.setPopupPositionAndShow(new PositionCallback() {
                @Override
                public void setPosition(final int offsetWidth, final int offsetHeight) {
                    final Position position = (Position) relative;
                    popup.setPopupPosition(position.getX(), position.getY());
                }
            });
        }
        descriptor.putValue(MenuDescriptor.MENU_ONSHOW, popup);
        Tooltip.getTip().hide();
    }
}