RCP：美化基于eclipse3.7.2的RCP界面

从e4开始，eclipse rcp界面具备了深度自定义的能力。

但是在eclipse3.7.2上，几乎没有提供能够用于修改界面的外部接口。

这里介绍一种方式来自定义你自己的eclipse rcp。

先看如下对比图：

可以看到有如下不同：

1、整体风格扁平化了，没有沿用win7的玻璃外框

2、横向的Menu被去掉了，整合到了左上角的按钮

3、视图的签页扁平化了

这只是一些示例，学习了以下方法，我们可以做更多的深度定制。

首先我们需要知道eclipse的工作台结构。

我们在创建一个eclipse rcp的时候，必然会用到Application，我们来看一下eclipse提供的IDEApplication这个类的start方法，注意123行

int returnCode = PlatformUI.createAndRunWorkbench(display,
                    new IDEWorkbenchAdvisor(processor));

观察IDEWorkbenchAdvisor可知，Workbench的创建被该类所代理了。

这里我们需要了解以下几个类：

Workbench 工作台（模型）
WorkbenchAdvisor 管理工作台生命周期
WorkbenchWindowAdvisor 提供ui配置，管理ui生命周期
WorkbechWindowConfigurer 配置保存类
WorbenchWindow 工作台UI（视图），基于SWT的界面类，实际上的RCP界面容器

于是，我们可以知道，只要能重写自己的WorbenchWindow，就能够达成目标。方式如下：

public class AimWorkbenchAdvisor extends IDEWorkbenchAdvisor {

    public AimWorkbenchAdvisor(DelayedEventsProcessor processor) {
        super(processor);
        Tweaklets.setDefault(WorkbenchImplementation.KEY,
                new AimWorkbench3xImplementation());
    }

    public WorkbenchWindowAdvisor createWorkbenchWindowAdvisor(
            IWorkbenchWindowConfigurer configurer) {
        return new AimWorkbenchWindowAdvisor(this, configurer);
    }

}

1、提供一个AimWorkbenchAdvisor的子类，用于替换IDEApplication中的IDEWorkbenchAdvisor实例。

2、替换WorkbenchWindow，通过Tweaklets.setDefault这个静态方法调用来实现

public class AimWorkbench3xImplementation extends Workbench3xImplementation {

    /*
     * (non-Javadoc)
     *
     * @see
     * org.eclipse.ui.internal.tweaklets.WorkbenchImplementation#createWBW(int)
     */
    public WorkbenchWindow createWorkbenchWindow(int newWindowNumber) {
//        return AimWorkbenchFrame.getInstance(newWindowNumber);
        return new AimWorkbenchWindow(newWindowNumber);
    }

}

3、（可选）提供一个新的AimWorkbenchWindowAdvisor，用于屏蔽menu、perspectiveBar等操作。代码如下：

public class AimWorkbenchWindowAdvisor extends IDEWorkbenchWindowAdvisor {

    public AimWorkbenchWindowAdvisor(IDEWorkbenchAdvisor wbAdvisor,
            IWorkbenchWindowConfigurer configurer) {
        super(wbAdvisor, configurer);
    }

    public void preWindowOpen() {
        super.preWindowOpen();
        IWorkbenchWindowConfigurer configurer = getWindowConfigurer();
        configurer.setShowMenuBar(false);
        configurer.setShowPerspectiveBar(false);
    }
}

完成了以上，我们就具备了自定义WorkbenchWindow的能力。

如果你不需要对RCP的外框、布局等进行修改，到了这一步其实就已经完成了。

如果希望深入定制，则需要更多知识。

首先需要学习TrimLayout，eclipse使用它作为基本布局，TrimLayout根据每个控件的ID，来针对性的排布。

主要分为四个部分，top,left,right,bottom

对TrimLayout进行改造，则可以重新布局。

重写WorkbenchWindow#createDefaultContents方法

在调用super.createDefaultContents之后，为shell重新设置一个你自己的TrimLayout

比如：

package cn.com.agree.ide.aim.product.ui.layout;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbenchPreferenceConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.layout.IWindowTrim;
import org.eclipse.ui.internal.layout.LayoutUtil;
import org.eclipse.ui.internal.layout.SizeCache;
import org.eclipse.ui.internal.layout.TrimArea;
import org.eclipse.ui.internal.layout.TrimCommonUIHandle;
import org.eclipse.ui.internal.layout.TrimDescriptor;
import org.eclipse.ui.internal.layout.TrimLayout;
import org.eclipse.ui.internal.layout.TrimToolBarBase;

/**
 * @author caiyu
 * @date 2014-12-20
 */
@SuppressWarnings({ "restriction", "rawtypes" })
public class AimTrimLayout extends TrimLayout {

    /**
     * Trim area ID.
     */
    public static final Integer TOP_ID = new Integer(TOP);
    /**
     * Trim area ID.
     */
    public static final Integer BAR_ID = new Integer(SWT.BAR);

    /**
     * Trim area ID.
     */
    public static final Integer BOTTOM_ID = new Integer(BOTTOM);

    /**
     * Trim area ID.
     */
    public static final Integer LEFT_ID = new Integer(LEFT);
    public static int ICON = new Integer(334);
    /**
     * Trim area ID.
     */
    public static final Integer ICON_ID = new Integer(ICON);

    /**
     * Trim area ID.
     */
    public static final Integer RIGHT_ID = new Integer(RIGHT);

    /**
     * Trim area ID.
     */
    public static final Integer NONTRIM_ID = new Integer(NONTRIM);
    /**
     * Trim area ID.
     */
    public static final Integer BORDER_ID = new Integer(SWT.BORDER);

    /**
     * IDs for the current trim areas we support.
     */
    private static final int[] TRIM_ID_INFO = { LEFT, RIGHT, TOP, BOTTOM,
            SWT.BAR, SWT.BORDER, ICON };
    public static int TOP_ANCHOR;

    private SizeCache centerArea = new SizeCache();

    /**
     * Map of TrimAreas by IDs.
     */
    private Map fTrimArea = new HashMap();

    /**
     * Map of TrimDescriptors by IDs.
     */
    private Map fTrimDescriptors = new HashMap();

    private boolean trimLocked;

    private HashMap preferredLocationMap = new HashMap();

    /**
     * Creates a new (initially empty) trim layout.
     */
    public AimTrimLayout() {
        // Determine whether or not the trim is 'locked'
        final IPreferenceStore store = PlatformUI.getPreferenceStore();
        trimLocked = store.getBoolean(IWorkbenchPreferenceConstants.LOCK_TRIM);

        createTrimArea(ICON_ID, ICON_ID.toString());
        createTrimArea(BAR_ID, BAR_ID.toString());
        createTrimArea(TOP_ID, TOP_ID.toString());
        createTrimArea(BOTTOM_ID, BOTTOM_ID.toString());
        createTrimArea(LEFT_ID, LEFT_ID.toString());
        createTrimArea(RIGHT_ID, RIGHT_ID.toString());
    }

    private void createTrimArea(Integer id, String displayName) {
        TrimArea area = new AimTrimArea(id.intValue(), displayName);
        fTrimArea.put(id, area);
    }

    /**
     * Returns the location of the given trim control. For example, returns
     * SWT.LEFT if the control is docked on the left, SWT.RIGHT if docked on the
     * right, etc. Returns SWT.DEFAULT if the given control is not a trim
     * control.
     *
     * @param trimControl
     *            control to query
     * @return The area ID of this control. If the control is not part of our
     *         trim, return SWT.DEFAULT.
     * @see #getAreaIds()
     */
    public int getTrimAreaId(Control trimControl) {
        TrimDescriptor desc = findTrimDescription(trimControl);
        if (desc != null) {
            return desc.getAreaId();
        }
        return SWT.DEFAULT;
    }

    /**
     * @param control
     *            new window trim to be added
     * @param areaId
     *            the area ID
     * @see #getAreaIds()
     * @deprecated
     */
    public void addTrim(IWindowTrim control, int areaId) {
        addTrim(areaId, control, null);
    }

    /**
     *
     * @param trim
     *            new window trim to be added
     * @param areaId
     *            the area ID
     * @param beforeMe
     *            if null, the control will be inserted as the last trim widget
     *            on this side of the layout. Otherwise, the control will be
     *            inserted before the given widget.
     * @see #getAreaIds()
     * @deprecated
     */
    public void addTrim(IWindowTrim trim, int areaId, IWindowTrim beforeMe) {
        addTrim(areaId, trim, beforeMe);
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.internal.layout.ITrimManager#addTrim(int,
     * org.eclipse.ui.internal.IWindowTrim)
     */
    public void addTrim(int areaId, IWindowTrim trim) {
        // If we're adding trim to the same side that it's
        // already on then don't change its order
        IWindowTrim insertBefore = null;
        List trimDescs = getAreaTrim(areaId);
        for (Iterator trimIter = trimDescs.iterator(); trimIter.hasNext();) {
            IWindowTrim curTrim = (IWindowTrim) trimIter.next();
            if (curTrim.getId().equals(trim.getId())) {
                if (trimIter.hasNext()) {
                    insertBefore = (IWindowTrim) trimIter.next();
                }
            }
        }

        addTrim(areaId, trim, insertBefore);
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.internal.layout.ITrimManager#addTrim(int,
     * org.eclipse.ui.internal.IWindowTrim, org.eclipse.ui.internal.IWindowTrim)
     */
    public void addTrim(int areaId, IWindowTrim trim, IWindowTrim beforeMe) {
        TrimArea area = (TrimArea) fTrimArea.get(new Integer(areaId));
        if (area == null) {
            return;
        }
        // remove the trim from the current layout
        removeTrim(trim);

        // Create a new trim descriptor for the new area...
        TrimDescriptor desc = new TrimDescriptor(trim, areaId);

        // If the trim can be relocated then add a dock ing handle
        boolean isAlreadyAHandle = trim instanceof TrimToolBarBase;
        if (!trimLocked && trim.getValidSides() != SWT.NONE
                && !isAlreadyAHandle) {
            // Create a 'docking' handle to allow dragging the trim
            Composite dockingHandle = new TrimCommonUIHandle(this, trim, areaId);
            desc.setDockingCache(new SizeCache(dockingHandle));
        }

        // Add the trim control
        SizeCache cache = new SizeCache(trim.getControl());
        trim.getControl().setLayoutData(trim);
        desc.setCache(cache);

        // Add a dispose listener so we can clean up if the Client disposes the
        // trim
        trim.getControl().addDisposeListener(new DisposeListener() {
            public void widgetDisposed(DisposeEvent e) {
                Control control = (Control) e.widget;
                if (control.getLayoutData() instanceof IWindowTrim) {
                    IWindowTrim trim = (IWindowTrim) control.getLayoutData();
                    removeTrim(trim);
                    // forceLayout();
                }
            }
        });

        // Add the new descriptor to the map
        fTrimDescriptors.put(desc.getId(), desc);

        // insert before behaviour, revisited
        if (beforeMe != null) {
            TrimDescriptor beforeDesc = (TrimDescriptor) fTrimDescriptors
                    .get(beforeMe.getId());
            if (beforeDesc != null && beforeDesc.getAreaId() == areaId) {
                area.addTrim(desc, beforeDesc);
            } else {
                area.addTrim(desc);
            }
        } else {
            area.addTrim(desc);
        }
    }

    /**
     * Force a layout of the trim
     */
    public void forceLayout() {
        removeDisposed();

        // we hack this by calling the LayoutUtil with the
        // first piece of trim that we find...(kludge!!)
        Iterator d = fTrimDescriptors.values().iterator();
        while (d.hasNext()) {
            TrimDescriptor desc = (TrimDescriptor) d.next();
            if (desc.getTrim().getControl() != null) {
                LayoutUtil.resize(desc.getTrim().getControl());
                return;
            }
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.eclipse.ui.internal.layout.ITrimManager#removeTrim(org.eclipse.ui
     * .internal.IWindowTrim)
     */
    public void removeTrim(IWindowTrim toRemove) {
        TrimDescriptor desc = (TrimDescriptor) fTrimDescriptors.remove(toRemove
                .getId());
        if (desc == null) {
            return;
        }

        TrimArea area = (TrimArea) fTrimArea.get(new Integer(desc.getAreaId()));
        if (area != null) {
            area.removeTrim(desc);
            desc.getCache().getControl().setLayoutData(null);
        }

        // If we had a trim UI handle then dispose it
        if (desc.getDockingCache() != null) {
            Control ctrl = desc.getDockingCache().getControl();

            // KLUDGE!! we'll leak a handle rather than losing the
            // mouse capture (for now...)
            ctrl.setVisible(false);
            // ctrl.dispose();
            desc.setDockingCache(null);
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.eclipse.ui.internal.layout.ITrimManager#getTrim(java.lang.String)
     */
    public IWindowTrim getTrim(String id) {
        TrimDescriptor desc = (TrimDescriptor) fTrimDescriptors.get(id);
        if (desc != null) {
            return desc.getTrim();
        }
        return null;
    }

    /**
     * Removes any disposed widgets from this layout. This is still experimental
     * code.
     */
    private void removeDisposed() {
        Iterator a = fTrimArea.values().iterator();
        while (a.hasNext()) {
            TrimArea area = (TrimArea) a.next();
            Iterator d = area.getDescriptors().iterator();
            while (d.hasNext()) {
                TrimDescriptor desc = (TrimDescriptor) d.next();
                Control nextControl = desc.getTrim().getControl();
                if (nextControl == null || nextControl.isDisposed()) {
                    // Remvoe the trim from the area's list (not the local copy)
                    area.removeTrim(desc);

                    // Remove it from the map
                    fTrimDescriptors.remove(desc.getId());
                }
            }
        }
    }

    /**
     * We -can't- determine the correct size for the shell because of it's
     * underlying 'big lie' structure (i.e. many of the controls are created as
     * children of the shell and then we play a games than makes them -appear-
     * to be contained in a Control hoerarchy) and the fact that most of the UI
     * elements don't really exist until shown (meaning that the normal
     * 'computeSize' mechanism won't work).
     *
     * See bug 166619 for details but we'll keep returning the current value for
     * legacy reasons...
     *
     * @see org.eclipse.swt.widgets.Layout#computeSize(org.eclipse.swt.widgets.Composite,
     *      int, int, boolean)
     */
    protected Point computeSize(Composite composite, int wHint, int hHint,
            boolean flushCache) {
        return new Point(0, 0);
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.eclipse.swt.widgets.Layout#layout(org.eclipse.swt.widgets.Composite,
     * boolean)
     */
    protected void layout(Composite composite, boolean flushCache) {
        // long startTime = System.currentTimeMillis();
        removeDisposed();

        // get the actual trim areas
        TrimArea bar = (TrimArea) fTrimArea.get(BAR_ID);
        TrimArea top = (TrimArea) fTrimArea.get(TOP_ID);
        TrimArea bottom = (TrimArea) fTrimArea.get(BOTTOM_ID);
        TrimArea left = (TrimArea) fTrimArea.get(LEFT_ID);
        TrimArea right = (TrimArea) fTrimArea.get(RIGHT_ID);

        Rectangle clientArea = composite.getClientArea();

        TrimArea icon = (TrimArea) fTrimArea.get(ICON_ID);
        Control iconControl = null;
        Point iconSize = null;
        for (Object cache : icon.getCaches()) {
            if (cache instanceof SizeCache) {
                iconControl = ((SizeCache) cache).getControl();
                iconSize = iconControl.computeSize(0, 0);
            }
        }

        // Determine the amount of space necessary for the trim areas
        int trim_bar = bar.computeWrappedTrim(clientArea.width
                - (iconSize == null ? 0 : iconSize.x - 10)) - 8;
        int trim_top = top.computeWrappedTrim(clientArea.width + trim_bar)
                + trim_bar;
        int trim_bottom = bottom.computeWrappedTrim(clientArea.width);

        // The space left over after the top and bottom have been laid out
        // represents the 'fixed' dimension for the vertical trim
        int verticalMajor = clientArea.height - (trim_top + trim_bottom);

        // Lay out the left/ hhhright trim areas
        // int trim_left = left.computeWrappedTrim(verticalMajor);
        // int trim_right = right.computeWrappedTrim(verticalMajor);
        int trim_left = 1;
        int trim_right = 1;

        int trim_icon = 0;
        if (iconSize != null) {
            trim_icon = iconSize.x;
            iconControl.setBounds(clientArea.x - 1, clientArea.y - 2,
                    iconSize.x, iconSize.y);
        }
        // TODO Tile the trim into the allotted space
        bar.tileTrim(clientArea.x + trim_icon - 3, clientArea.y - 2,
                clientArea.width);
        top.tileTrim(clientArea.x + trim_icon, clientArea.y + trim_bar + 2,
                clientArea.width - trim_icon);
        bottom.tileTrim(clientArea.x - 2, clientArea.height - trim_bottom,
                clientArea.width);
        left.tileTrim(clientArea.x, clientArea.y + trim_top, verticalMajor);
        right.tileTrim(clientArea.width - trim_right, clientArea.y + trim_top,
                verticalMajor);

        // Lay out the center area in to the 'leftover' space
        if (centerArea.getControl() != null) {
            Control caCtrl = centerArea.getControl();
            caCtrl.setBounds(clientArea.x + trim_left, clientArea.y + trim_top,
                    clientArea.width - (trim_left + trim_right),
                    clientArea.height - (trim_top + trim_bottom));
        }
    }

    /**
     * Sets the widget that will occupy the central area of the layout.
     * Typically, this will be a composite that contains the main widgetry of
     * the application.
     *
     * @param center
     *            control that will occupy the center of the layout, or null if
     *            none
     */
    public void setCenterControl(Control center) {
        centerArea.setControl(center);
    }

    /**
     * Returns the control in the center of this layout
     *
     * @return the center area control.
     */
    public Control getCenterControl() {
        return centerArea.getControl();
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.eclipse.ui.internal.layout.ICachingLayout#flush(org.eclipse.swt.widgets
     * .Control)
     */
    public void flush(Control dirtyControl) {
        if (dirtyControl == centerArea.getControl()) {
            centerArea.flush();
        } else {
            TrimDescriptor desc = findTrimDescription(dirtyControl);
            if (desc != null) {
                desc.flush();
            }
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.internal.layout.ITrimManager#getAreaIds()
     */
    public int[] getAreaIds() {
        return (int[]) TRIM_ID_INFO.clone();
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.internal.layout.ITrimManager#getAreaTrim(int)
     */
    public List getAreaTrim(int areaId) {
        TrimArea area = (TrimArea) fTrimArea.get(new Integer(areaId));
        if (area == null) {
            return Collections.EMPTY_LIST;
        }
        return area.getTrims();
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.internal.layout.ITrimManager#updateAreaTrim(int,
     * java.util.List, boolean)
     */
    public void updateAreaTrim(int id, List trim, boolean removeExtra) {
        TrimArea area = (TrimArea) fTrimArea.get(new Integer(id));
        if (area == null) {
            return;
        }
        List current = area.getTrims();

        // add back the trim ... this takes care of moving it
        // from one trim area to another.
        Iterator i = trim.iterator();
        while (i.hasNext()) {
            IWindowTrim t = (IWindowTrim) i.next();
            t.dock(id); // Ensure that the trim is properly oriented
            addTrim(id, t, null);
            current.remove(t);
        }

        if (removeExtra) {
            // if it wasn't removed from the current list, then it's extra
            // trim we don't need.
            i = current.iterator();
            while (i.hasNext()) {
                IWindowTrim t = (IWindowTrim) i.next();
                removeTrim(t);
            }
        }
    }

    /**
     * Return a trim area rectangle.
     *
     * @param window
     *            the window that has the trim
     * @param areaId
     *            the side it's on
     * @return the area rectangle.
     * @since 3.2
     * @see #getAreaIds()
     */
    public Rectangle getTrimRect(Composite window, int areaId) {
        TrimArea area = getTrimArea(areaId);
        return window.getDisplay().map(window, null, area.getCurRect());
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.internal.layout.ITrimManager#getAllTrim()
     */
    public List getAllTrim() {
        List trimList = new ArrayList(fTrimDescriptors.size());

        Iterator d = fTrimDescriptors.values().iterator();
        while (d.hasNext()) {
            TrimDescriptor desc = (TrimDescriptor) d.next();
            trimList.add(desc.getTrim());
        }

        return trimList;
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.eclipse.ui.internal.layout.ITrimManager#setTrimVisible(org.eclipse
     * .ui.internal.IWindowTrim, boolean)
     */
    public void setTrimVisible(IWindowTrim trim, boolean visible) {
        TrimDescriptor desc = findTrimDescription(trim.getControl());

        if (desc != null) {
            desc.setVisible(visible);
        }
    }

    /**
     * Find the trim descriptor for this control.
     *
     * @param trim
     *            the Control to find.
     * @return the trim descriptor, or <code>null</code> if not found.
     * @since 3.2
     */
    private TrimDescriptor findTrimDescription(Control trim) {
        Iterator d = fTrimDescriptors.values().iterator();
        while (d.hasNext()) {
            TrimDescriptor desc = (TrimDescriptor) d.next();
            if (desc.getTrim().getControl() == trim) {
                return desc;
            }
            if (desc.getDockingCache() != null
                    && desc.getDockingCache().getControl() == trim) {
                return desc;
            }
        }
        return null;
    }

    /**
     * Return the trim area associated with the given id
     *
     * @param areaId
     *            The id of the trim area to get
     * @return The TrimArea or <code>null</code> if the id is not found
     */
    public TrimArea getTrimArea(int areaId) {
        return (TrimArea) fTrimArea.get(new Integer(areaId));
    }

    /**
     * Remember the persisted locations for the trim. This allows the code to
     * site the trim in its preferred (i.e. cached) location on creation
     *
     * @param areaId
     *            The id of the trim area being defined
     * @param preferredLocations
     *            A list of trim ID's
     */
    public void setPreferredLocations(int areaId, List preferredLocations) {
        preferredLocationMap.put(new Integer(areaId), preferredLocations);
    }

    /**
     * If the given id has a cached location return its preferred side
     *
     * @param trimId
     *            The id of the trim to be tested
     * @return The areaId of a cached id or -1 if no cache info exists
     */
    public int getPreferredArea(String trimId) {
        Iterator keyIter = preferredLocationMap.keySet().iterator();
        while (keyIter.hasNext()) {
            Integer key = (Integer) keyIter.next();
            List areaList = (List) preferredLocationMap.get(key);
            if (areaList.contains(trimId))
                return key.intValue();
        }

        return -1;
    }

    /**
     * If the given id has a cached location return an existing trim element
     * that it should be placed before (if any)
     *
     * @param trimId
     *            The id of the trim to be tested
     * @return The trim to be inserted before or <code>null</code> if no cached
     *         info exists
     */
    public IWindowTrim getPreferredLocation(String trimId) {
        Iterator keyIter = preferredLocationMap.keySet().iterator();
        while (keyIter.hasNext()) {
            Integer key = (Integer) keyIter.next();
            List areaList = (List) preferredLocationMap.get(key);
            int index = areaList.indexOf(trimId);
            if (index != -1) {
                // OK, find the first 'real' trim after this one
                // This will be used as the 'beforeMe' parameter
                // in the 'addTrim' call
                for (int i = index + 1; i < areaList.size(); i++) {
                    String id = (String) areaList.get(i);
                    IWindowTrim trim = getTrim(id);
                    if (trim != null)
                        return trim;
                }
            }
        }

        return null;
    }

    /**
     * Disables the controls associated with visible trim elements. This is only
     * used during long-running WorkbenchWindow operations to prevent users from
     * changing the environment while the operation (i.e. a long-running editor
     * 'save') is in progress.
     *
     * The expected life-cycle is to first call this this method to disable any
     * visible trim (and caching the elements that had to be disabled) followed
     * by a call to 'enableTrim' passing in the list returned from this method.
     *
     * @param ignoreMe
     *            Since the current UI has a disable button in the StatusLine we
     *            allow the caller to designate one piece of trim to ignore
     *
     * @return The list of trim controls that were disabled during this call
     */
    public List disableTrim(IWindowTrim ignoreMe) {
        List disabledControls = new ArrayList();

        // Disable all the trim -except- for 'ignoreMe'
        List allTrim = getAllTrim();
        for (Iterator trimIter = allTrim.iterator(); trimIter.hasNext();) {
            IWindowTrim trim = (IWindowTrim) trimIter.next();
            if (ignoreMe == trim)
                continue;

            Control ctrl = trim.getControl();
            if (ctrl == null || ctrl.isDisposed() || !ctrl.isVisible()
                    || !ctrl.isEnabled())
                continue;

            ctrl.setEnabled(false);
            disabledControls.add(ctrl);
        }

        return disabledControls;
    }

    /**
     * Enables the controls in the list. This list is expected to be a
     * non-modified List as returned from a call to 'disableTrim'.
     *
     * @param disabledControls
     *            The list of controls to enable
     */
    public void enableTrim(List disabledControls) {
        // Simply re-enable any controls in the list
        for (Iterator dcIter = disabledControls.iterator(); dcIter.hasNext();) {
            Control ctrl = (Control) dcIter.next();

            if (!ctrl.isDisposed() && !ctrl.isEnabled())
                ctrl.setEnabled(true);
        }
    }
}

TrimLayout并不适合继承，所以我copy了一份出来，加入了"Bar"区域和"ICON"区域

以上 就完成了基本的改写。