com.gwos.client.ui.desktop.IconsArea.java Source code

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Here is the source code for com.gwos.client.ui.desktop.IconsArea.java

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/*
 * Copyright 2013 - Elian ORIOU
 *
 *    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.gwos.client.ui.desktop;

import java.util.ArrayList;
import java.util.List;

import com.extjs.gxt.ui.client.event.ComponentEvent;
import com.extjs.gxt.ui.client.event.Events;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.fx.Draggable;
import com.extjs.gxt.ui.client.widget.Component;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.layout.AbsoluteData;
import com.extjs.gxt.ui.client.widget.layout.AbsoluteLayout;
import com.extjs.gxt.ui.client.widget.menu.Menu;
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.gwos.client.constants.Constants;
import com.gwos.client.context.ClientContext;
import com.gwos.client.core.shell.CommandInterpreter;
import com.gwos.client.ui.desktop.components.ContextMenuBundle;
import com.gwos.client.ui.desktop.components.ContextMenuBundle.MenuContext;
import com.gwos.client.ui.desktop.components.DesktopIcon;
import com.gwos.client.ui.desktop.components.IContextMenuCapable;

public class IconsArea extends Composite implements IContextMenuCapable {

    private int iconX;
    private int iconY;
    private LayoutContainer rootPanel;
    private List<DesktopIcon> icons;

    public IconsArea() {
        this.iconX = Constants._DESKTOP_ICONS_X_START;
        this.iconY = Constants._DESKTOP_ICONS_Y_START;
        this.icons = new ArrayList<DesktopIcon>();
        render();
        initWidget(rootPanel);
        setAreaSize();
    }

    private void render() {
        rootPanel = new LayoutContainer(new AbsoluteLayout());
        rootPanel.setLayoutOnChange(true);
        setContextualMenu(rootPanel);
    }

    private void addIconOnDesktop(DesktopIcon icon) {
        rootPanel.add(icon, new AbsoluteData(iconX, iconY));
        if (iconY > ClientContext.getInstance().getBrowserHeight() - Constants._DESKTOP_ICONS_Y_SPACE) {
            iconY = Constants._DESKTOP_ICONS_Y_START;
            iconX += Constants._DESKTOP_ICONS_X_SPACE;
        } else {
            iconY += Constants._DESKTOP_ICONS_Y_SPACE;
        }
        setListeners(icon);
        new Draggable(icon);
    }

    public void addIcon(DesktopIcon icon) {
        icons.add(icon);
        addIconOnDesktop(icon);
    }

    public void resetLayout() {

        this.iconX = Constants._DESKTOP_ICONS_X_START;
        this.iconY = Constants._DESKTOP_ICONS_Y_START;

        // Remove all childs
        rootPanel.removeAll();

        // Re-add them
        for (DesktopIcon icon : icons) {
            icon.removeAllListeners();
            addIconOnDesktop(icon);
        }
    }

    private void setListeners(final DesktopIcon icon) {
        icon.addListener(Events.OnDoubleClick, new Listener<ComponentEvent>() {
            @Override
            public void handleEvent(ComponentEvent be) {
                CommandInterpreter.getInstance().handleSystemCommand(icon.getCommand());
            }
        });
    }

    private void setAreaSize() {
        rootPanel.setSize(Window.getClientWidth(), Window.getClientHeight() - Constants.TASK_BAR_HEIGHT_OFFSET);
        Window.addResizeHandler(new ResizeHandler() {
            public void onResize(ResizeEvent event) {
                rootPanel.setSize(event.getWidth(), event.getHeight() - Constants.TASK_BAR_HEIGHT_OFFSET);
            }
        });
    }

    @Override
    public void setContextualMenu(Component component) {
        Menu contextMenu = ContextMenuBundle.getContextMenu(MenuContext.DESKTOP_CONTEXT);
        component.setContextMenu(contextMenu);
    }
}