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

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Here is the source code for com.google.gdt.eclipse.designer.uibinder.model.widgets.WidgetTopBoundsSupport.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.common.collect.Maps;
import com.google.gdt.eclipse.designer.hosted.IBrowserShell;

import org.eclipse.wb.draw2d.geometry.Dimension;
import org.eclipse.wb.internal.core.xml.model.TopBoundsSupport;
import org.eclipse.wb.internal.core.xml.model.utils.XmlObjectUtils;

import java.util.Map;

/**
 * Implementation of {@link TopBoundsSupport} for any {@link WidgetInfo} except
 * <code>RootPanel</code>.
 * 
 * @author scheglov_ke
 * @coverage GWT.UiBinder.model
 */
public class WidgetTopBoundsSupport extends TopBoundsSupport {
    private final WidgetInfo m_widget;

    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public WidgetTopBoundsSupport(WidgetInfo widget) {
        super(widget);
        m_widget = widget;
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // TopBoundsSupport
    //
    ////////////////////////////////////////////////////////////////////////////
    /**
     * This constant is using to expand size of {@link IBrowserShell} relative to size of widget. We
     * need to do this because (for unknown reason) in other case GWT DialogBox and PopupPanel do
     * wrapping after changing {@link IBrowserShell} size, so change size of image to take.
     */
    private static final int SIZE_EXPAND = 50;

    @Override
    public void apply() throws Exception {
        dontUseBorderForRootPanel();
        // apply size to get actual widget size
        Dimension resourceSize = getResourceSize();
        doApply(resourceSize);
        // get the real "size" to include full widget
        Dimension size = getExpandedSize();
        // correct size to fit into top-level root panel
        Dimension correctedSize = new Dimension(resourceSize);
        correctedSize.width -= size.width - resourceSize.width;
        correctedSize.height -= size.height - resourceSize.height;
        // apply corrected size to the widget
        if (correctedSize.width > 0 && correctedSize.height > 0) {
            doApply(correctedSize);
        }
        afterApply();
        // set Shell size
        IBrowserShell shell = m_widget.getState().getShell();
        shell.prepare();
        org.eclipse.swt.graphics.Rectangle shellBounds = shell.computeTrim(0, 0, size.width, size.height);
        shell.setSize(shellBounds.width + SIZE_EXPAND, shellBounds.height + SIZE_EXPAND);
    }

    private void doApply(Dimension resourceSize) throws Exception {
        applySizeUsingScript(resourceSize);
    }

    protected void afterApply() throws Exception {
    }

    protected Dimension getExpandedSize() throws Exception {
        return m_widget.getState().getAbsoluteBounds(m_widget.getDOMElement()).getSize();
    }

    private void dontUseBorderForRootPanel() throws Exception {
        m_widget.getUIObjectUtils().executeScript("DOM.setStyleAttribute(rootPanel.getElement(), 'border', '0');");
    }

    @Override
    public void setSize(int width, int height) throws Exception {
        setSizeUsingScript(width, height);
        setResourceSize(width, height);
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Script utils
    //
    ////////////////////////////////////////////////////////////////////////////
    private void applySizeUsingScript(Dimension size) throws Exception {
        invokeSizeScript("applyTopBoundsScript", true, size);
    }

    private void setSizeUsingScript(int width, int height) throws Exception {
        invokeSizeScript("setTopBoundsScript", false, new Dimension(width, height));
    }

    private void invokeSizeScript(String scriptName, boolean required, Dimension size) throws Exception {
        String script = XmlObjectUtils.getParameter(m_widget, scriptName);
        if (script != null) {
            Map<String, Object> variables = Maps.newTreeMap();
            variables.put("model", m_widget);
            variables.put("widget", m_widget.getObject());
            variables.put("size", size);
            m_widget.getUIObjectUtils().executeScript(script, variables);
        }
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Show
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    public boolean show() throws Exception {
        m_widget.getState().showShell();
        return true;
    }
}