org.xtuml.bp.ui.search.providers.DecoratingModelSearchLabelProvider.java Source code

Introduction

Here is the source code for org.xtuml.bp.ui.search.providers.DecoratingModelSearchLabelProvider.java

Source

package org.xtuml.bp.ui.search.providers;

//========================================================================
//
//File:      $RCSfile: DecoratingModelSearchLabelProvider.java,v $
//Version:   $Revision: 1.4 $
//Modified:  $Date: 2013/01/10 23:13:53 $
//
//Copyright (c) 2005-2014 Mentor Graphics Corporation.  All rights reserved.
//
//========================================================================
// 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.
//======================================================================== 
//
import org.eclipse.jface.preference.JFacePreferences;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider;
import org.eclipse.jface.viewers.IDecorationContext;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.jface.viewers.ViewerColumn;
import org.eclipse.jface.viewers.StyledString.Styler;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbenchPreferenceConstants;
import org.eclipse.ui.PlatformUI;

public class DecoratingModelSearchLabelProvider extends DecoratingStyledCellLabelProvider
        implements IPropertyChangeListener, ILabelProvider {

    private static final String HIGHLIGHT_BG_COLOR_NAME = "org.eclipse.jdt.ui.ColoredLabels.match_highlight"; //$NON-NLS-1$
    public static final Styler HIGHLIGHT_STYLE = StyledString.createColorRegistryStyler(null,
            HIGHLIGHT_BG_COLOR_NAME);

    public DecoratingModelSearchLabelProvider(IStyledLabelProvider labelProvider, ILabelDecorator decorator,
            IDecorationContext decorationContext) {
        super(labelProvider, decorator, decorationContext);
    }

    @Override
    public void initialize(ColumnViewer viewer, ViewerColumn column) {
        PlatformUI.getPreferenceStore().addPropertyChangeListener(this);
        JFaceResources.getColorRegistry().addListener(this);

        setOwnerDrawEnabled(showColoredLabels());

        super.initialize(viewer, column);
    }

    @Override
    protected StyleRange prepareStyleRange(StyleRange styleRange, boolean applyColors) {
        if (!applyColors && styleRange.background != null) {
            styleRange = super.prepareStyleRange(styleRange, applyColors);
            styleRange.borderStyle = SWT.BORDER_DOT;
            return styleRange;
        }
        return super.prepareStyleRange(styleRange, applyColors);
    }

    @Override
    public void propertyChange(PropertyChangeEvent event) {
        String property = event.getProperty();
        if (property.equals(JFacePreferences.QUALIFIER_COLOR) || property.equals(JFacePreferences.COUNTER_COLOR)
                || property.equals(JFacePreferences.DECORATIONS_COLOR) || property.equals(HIGHLIGHT_BG_COLOR_NAME)
                || property.equals(IWorkbenchPreferenceConstants.USE_COLORED_LABELS)) {
            Display.getDefault().asyncExec(new Runnable() {
                public void run() {
                    refresh();
                }
            });
        }
    }

    protected void refresh() {
        ColumnViewer viewer = getViewer();

        if (viewer == null) {
            return;
        }
        boolean showColoredLabels = showColoredLabels();
        if (showColoredLabels != isOwnerDrawEnabled()) {
            setOwnerDrawEnabled(showColoredLabels);
            viewer.refresh();
        } else if (showColoredLabels) {
            viewer.refresh();
        }
    }

    private boolean showColoredLabels() {
        return PlatformUI.getPreferenceStore().getBoolean(IWorkbenchPreferenceConstants.USE_COLORED_LABELS);
    }

    @Override
    public String getText(Object element) {
        return getStyledText(element).getString();
    }

}