com.google.gdt.eclipse.designer.uibinder.model.widgets.AbsolutePanelInfo.java Source code

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Here is the source code for com.google.gdt.eclipse.designer.uibinder.model.widgets.AbsolutePanelInfo.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 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.google.gdt.eclipse.designer.uibinder.model.widgets;

import com.google.gdt.eclipse.designer.model.widgets.panels.IAbsolutePanelInfo;

import org.eclipse.wb.core.model.ObjectInfo;
import org.eclipse.wb.core.model.broadcast.ObjectEventListener;
import org.eclipse.wb.draw2d.geometry.Dimension;
import org.eclipse.wb.draw2d.geometry.Point;
import org.eclipse.wb.draw2d.geometry.Rectangle;
import org.eclipse.wb.internal.core.DesignerPlugin;
import org.eclipse.wb.internal.core.EnvironmentUtils;
import org.eclipse.wb.internal.core.model.layout.absolute.IPreferenceConstants;
import org.eclipse.wb.internal.core.model.layout.absolute.OrderingSupport;
import org.eclipse.wb.internal.core.model.util.AbsoluteLayoutCreationFlowSupport;
import org.eclipse.wb.internal.core.model.util.ObjectInfoAction;
import org.eclipse.wb.internal.core.utils.check.Assert;
import org.eclipse.wb.internal.core.utils.xml.DocumentElement;
import org.eclipse.wb.internal.core.xml.editor.DesignContextMenuProvider;
import org.eclipse.wb.internal.core.xml.model.EditorContext;
import org.eclipse.wb.internal.core.xml.model.clipboard.ClipboardCommand;
import org.eclipse.wb.internal.core.xml.model.creation.CreationSupport;
import org.eclipse.wb.internal.core.xml.model.description.ComponentDescription;
import org.eclipse.wb.internal.core.xml.model.property.converter.IntegerConverter;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.preference.IPreferenceStore;

import java.util.List;

/**
 * Model for <code>com.google.gwt.user.client.ui.AbsolutePanel</code> in GWT UiBinder.
 * 
 * @author scheglov_ke
 * @coverage GWT.UiBinder.model
 */
public class AbsolutePanelInfo extends ComplexPanelInfo implements IAbsolutePanelInfo<WidgetInfo> {
    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public AbsolutePanelInfo(EditorContext context, ComponentDescription description,
            CreationSupport creationSupport) throws Exception {
        super(context, description, creationSupport);
        contributeWidgetContextMenu();
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Context menu
    //
    ////////////////////////////////////////////////////////////////////////////
    private void contributeWidgetContextMenu() {
        addBroadcastListener(new ObjectEventListener() {
            @Override
            public void addContextMenu(List<? extends ObjectInfo> objects, ObjectInfo object, IMenuManager manager)
                    throws Exception {
                if (object instanceof WidgetInfo && object.getParent() == AbsolutePanelInfo.this) {
                    WidgetInfo component = (WidgetInfo) object;
                    contributeWidgetContextMenu(manager, component);
                }
            }
        });
    }

    /**
     * Contributes {@link Action}'s into {@link WidgetInfo} context menu.
     */
    private void contributeWidgetContextMenu(IMenuManager manager, final WidgetInfo widget) {
        // order
        {
            List<WidgetInfo> widgets = getChildrenWidgets();
            new OrderingSupport(widgets, widget).contributeActions(manager);
        }
        // auto-size
        {
            IAction action = new ObjectInfoAction(widget, "Autosize widget",
                    DesignerPlugin.getImageDescriptor("info/layout/absolute/fit_to_size.png")) {
                @Override
                protected void runEx() throws Exception {
                    widget.getSizeSupport().setSize(null);
                }
            };
            manager.appendToGroup(DesignContextMenuProvider.GROUP_CONSTRAINTS, action);
        }
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Commands
    //
    ////////////////////////////////////////////////////////////////////////////
    public void command_BOUNDS(WidgetInfo widget, Point location, Dimension size) throws Exception {
        Assert.isTrue(getChildren().contains(widget), "%s is not child of %s.", widget, this);
        if (size != null) {
            widget.getSizeSupport().setSize(size);
        }
        if (location != null) {
            setLocation(widget, location);
        }
        // check creation flow
        if (location != null && (widget.getModelBounds() != null || EnvironmentUtils.isTestingTime())
                && useCreationFlow()) {
            AbsoluteLayoutCreationFlowSupport.apply(this, getChildrenWidgets(), widget, location, size);
        }
    }

    /**
     * Modifies location of {@link WidgetInfo}.
     * 
     * @param location
     *          new location, not <code>null</code>.
     */
    private void setLocation(WidgetInfo widget, Point location) throws Exception {
        String xString = IntegerConverter.INSTANCE.toSource(this, location.x);
        String yString = IntegerConverter.INSTANCE.toSource(this, location.y);
        //
        DocumentElement positionElement = widget.getElement().getParent();
        positionElement.setAttribute("left", xString);
        positionElement.setAttribute("top", yString);
    }

    private boolean useCreationFlow() {
        IPreferenceStore preferences = getDescription().getToolkit().getPreferences();
        return preferences.getBoolean(IPreferenceConstants.P_CREATION_FLOW);
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Clipboard
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    protected void clipboardCopy_addWidgetCommands(WidgetInfo widget, List<ClipboardCommand> commands)
            throws Exception {
        final Rectangle modelBounds = widget.getModelBounds();
        commands.add(new PanelClipboardCommand<AbsolutePanelInfo>(widget) {
            private static final long serialVersionUID = 0L;

            @Override
            protected void add(AbsolutePanelInfo panel, WidgetInfo widget) throws Exception {
                panel.command_CREATE2(widget, null);
                panel.command_BOUNDS(widget, modelBounds.getLocation(), null);
            }
        });
    }
}