ralfstx.mylyn.bugview.internal.TaskLabelProvider.java Source code

Introduction

Here is the source code for ralfstx.mylyn.bugview.internal.TaskLabelProvider.java

Source

/*******************************************************************************
 * Copyright (c) 2011 Ralf Sternberg.
 * 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
 *
 * Contributors:
 *    Ralf Sternberg - initial implementation and API
 ******************************************************************************/
package ralfstx.mylyn.bugview.internal;

import org.eclipse.jface.resource.ColorRegistry;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.RGB;

import ralfstx.mylyn.bugview.TaskMatcher;
import ralfstx.mylyn.bugview.TaskMatchers;

class TaskLabelProvider extends ColumnLabelProvider {

    private static final String DEFECT_ICON = "defect-icon";
    private static final String ENHANCEMENT_ICON = "enhancement-icon";
    private static final String COLOR_P1 = TaskLabelProvider.class.getName() + ".prio1";
    private static final String COLOR_P2 = TaskLabelProvider.class.getName() + ".prio2";
    private static final String COLOR_P4 = TaskLabelProvider.class.getName() + ".prio4";
    private static final String COLOR_P5 = TaskLabelProvider.class.getName() + ".prio5";
    private final TaskMatcher enhancementMatcher;
    private final TaskMatcher incomingMatcher;
    private final TaskMatcher outgoingMatcher;

    public TaskLabelProvider() {
        enhancementMatcher = TaskMatchers.isEnhancement();
        incomingMatcher = TaskMatchers.isIncoming();
        outgoingMatcher = TaskMatchers.isOutgoing();
        initializeImages();
        initializeColors();
    }

    public Image getColumnImage(Object element, int columnIndex) {
        Image result = null;
        if (element instanceof ITask) {
            if (columnIndex == BugView.COL_ID) {
                ITask task = (ITask) element;
                if (enhancementMatcher.matches(task)) {
                    result = JFaceResources.getImageRegistry().get(ENHANCEMENT_ICON);
                } else {
                    result = JFaceResources.getImageRegistry().get(DEFECT_ICON);
                }
            }
        }
        return result;
    }

    public String getColumnText(Object element, int columnIndex) {
        String result = null;
        if (element instanceof ITask) {
            ITask task = (ITask) element;
            if (columnIndex == BugView.COL_ID) {
                result = task.getTaskId();
            } else if (columnIndex == BugView.COL_TITLE) {
                result = task.getSummary();
            }
        }
        return result;
    }

    @Override
    public Color getForeground(Object element) {
        if (element instanceof ITask) {
            ITask task = (ITask) element;
            String priority = task.getPriority();
            if ("P1".equals(priority)) {
                return JFaceResources.getColorRegistry().get(COLOR_P1);
            }
            if ("P2".equals(priority)) {
                return JFaceResources.getColorRegistry().get(COLOR_P2);
            }
            if ("P4".equals(priority)) {
                return JFaceResources.getColorRegistry().get(COLOR_P4);
            }
            if ("P5".equals(priority)) {
                return JFaceResources.getColorRegistry().get(COLOR_P5);
            }
        }
        return null;
    }

    @Override
    public Font getFont(Object element) {
        if (element instanceof ITask) {
            ITask task = (ITask) element;
            if (incomingMatcher.matches(task)) {
                return JFaceResources.getFontRegistry().getBold(JFaceResources.DEFAULT_FONT);
            }
            if (outgoingMatcher.matches(task)) {
                return JFaceResources.getFontRegistry().getItalic(JFaceResources.DEFAULT_FONT);
            }
        }
        return null;
    }

    @Override
    public String getToolTipText(Object element) {
        if (element instanceof ITask) {
            ITask task = (ITask) element;
            return task.getSummary();
        }
        return null;
    }

    @Override
    public void update(ViewerCell cell) {
        Object element = cell.getElement();
        int columnIndex = cell.getColumnIndex();
        cell.setText(getColumnText(element, columnIndex));
        cell.setImage(getColumnImage(element, columnIndex));
        cell.setBackground(getBackground(element));
        cell.setForeground(getForeground(element));
        cell.setFont(getFont(element));
    }

    private static void initializeColors() {
        ColorRegistry colorRegistry = JFaceResources.getColorRegistry();
        colorRegistry.put(COLOR_P1, new RGB(0xFF, 0, 0));
        colorRegistry.put(COLOR_P2, new RGB(0x80, 0, 0));
        colorRegistry.put(COLOR_P4, new RGB(0x80, 0x80, 0x80));
        colorRegistry.put(COLOR_P5, new RGB(0xC0, 0xC0, 0xC0));
    }

    private static void initializeImages() {
        ImageRegistry imageRegistry = JFaceResources.getImageRegistry();
        registeImage(DEFECT_ICON, "/icons/defect.png", imageRegistry);
        registeImage(ENHANCEMENT_ICON, "/icons/enhancement.png", imageRegistry);

    }

    private static void registeImage(String key, String imageFilePath, ImageRegistry imageRegistry) {
        if (imageRegistry.get(key) == null) {
            imageRegistry.put(key, Activator.getImageDescriptor(imageFilePath));
        }
    }

}