src/plugins/db.core/src/com/motorolamobility/studio/android/db/core/ui/tree/DatabaseExplorerTreeLabelProvider.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.motorolamobility.studio.android.db.core.ui.tree;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.viewers.CellLabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.ui.IDecoratorManager;
import org.eclipse.ui.PlatformUI;

import com.motorolamobility.studio.android.db.core.i18n.DbCoreNLS;
import com.motorolamobility.studio.android.db.core.ui.AbstractTreeNode;
import com.motorolamobility.studio.android.db.core.ui.ITreeNode;
import com.motorolamobility.studio.android.db.core.ui.view.MOTODEVDatabaseExplorerView;

/**
 * Provides label for the tree into {@link MOTODEVDatabaseExplorerView} by encapsulating {@link AbstractTreeNode} 
 */
public class DatabaseExplorerTreeLabelProvider extends CellLabelProvider
{
    final IDecoratorManager decorator;

    public enum LabelProperty
    {
        TEXT, IMAGE;
    }

    public DatabaseExplorerTreeLabelProvider()
    {
        decorator = PlatformUI.getWorkbench().getDecoratorManager();
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.BaseLabelProvider#addListener(org.eclipse.jface.viewers.ILabelProviderListener)
     */
    @Override
    public void addListener(ILabelProviderListener listener)
    {
        decorator.addListener(listener);
        super.addListener(listener);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.BaseLabelProvider#removeListener(org.eclipse.jface.viewers.ILabelProviderListener)
     */
    @Override
    public void removeListener(ILabelProviderListener listener)
    {
        decorator.removeListener(listener);
        super.removeListener(listener);
    }

    public Image getImage(Object element)
    {
        Image result = null;
        if (element instanceof AbstractTreeNode)
        {
            ITreeNode treeNode = (ITreeNode) element;
            Image defaultImage = treeNode.getIcon().createImage();
            result = decorator.decorateImage(defaultImage, element);
            if (result == null)
            {
                result = defaultImage;
            }
        }

        return result;
    }

    public String getText(Object element)
    {
        if (element instanceof AbstractTreeNode)
        {
            ITreeNode treeNode = (ITreeNode) element;
            return treeNode.getName();
        }
        return null;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.BaseLabelProvider#isLabelProperty(java.lang.Object, java.lang.String)
     */
    @Override
    public boolean isLabelProperty(Object element, String property)
    {
        boolean isLabelProperty = false;
        LabelProperty labelProperty = LabelProperty.valueOf(property);
        if (labelProperty != null)
        {
            isLabelProperty = true;
        }

        return isLabelProperty;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.CellLabelProvider#getToolTipText(java.lang.Object)
     */
    @Override
    public String getToolTipText(Object element)
    {
        if (element instanceof ITreeNode)
        {
            ITreeNode treeNode = (ITreeNode) element;
            String tooltipText = treeNode.getTooltip();
            IStatus nodeStatus = treeNode.getNodeStatus();
            if ((nodeStatus != null) && !nodeStatus.isOK())
            {
                String statusMessage = nodeStatus.getMessage();
                if ((statusMessage != null) && !statusMessage.isEmpty())
                {
                    tooltipText =
                            NLS.bind(
                                    DbCoreNLS.DatabaseExplorerTreeLabelProvider_Error_Tooltip_Prefix,
                                    statusMessage);
                }
            }
            return tooltipText;
        }
        return super.getToolTipText(element);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.CellLabelProvider#getToolTipTimeDisplayed(java.lang.Object)
     */
    @Override
    public int getToolTipTimeDisplayed(Object object)
    {
        return 4000;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.CellLabelProvider#getToolTipDisplayDelayTime(java.lang.Object)
     */
    @Override
    public int getToolTipDisplayDelayTime(Object object)
    {
        return 500;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.CellLabelProvider#getToolTipShift(java.lang.Object)
     */
    @Override
    public Point getToolTipShift(Object object)
    {
        return new Point(5, 5);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.CellLabelProvider#update(org.eclipse.jface.viewers.ViewerCell)
     */
    @Override
    public void update(ViewerCell cell)
    {
        Object cellElement = cell.getElement();
        cell.setText(getText(cellElement));
        cell.setImage(getImage(cellElement));
    }

}