一开始还在怀疑这个能否实CQ不q后来看了看代码Q发现这是完全可行的Q且看我l细道来Q?br />
先看GraphicalEditorWithFlyoutPalette里的splitterq个成员Q它把整个editor分成了两个部分一个就是大的用于GEFd的那部䆾Q另外一部分很明昑ְ是palette啦！说这么多Q看看它的createControlҎ全明白啦：
public void createPartControl(Composite parent) {
splitter = new FlyoutPaletteComposite(parent, SWT.NONE, getSite().getPage(), getPaletteViewerProvider(), getPalettePreferences()); super.createPartControl(splitter); splitter.setGraphicalControl(getGraphicalControl());
if (page != null) {
splitter.setExternalViewer(page.getPaletteViewer()); page = null;
}
}其中的setExternalviewer是攄palette的viewerQ说到viewer我的W一个联惛_是SWT里的viewer其实不是q样的，q里的viewer其实与一个基于GEF的Graphcial ViewerQ也是_我们在一个graphical editor里看到的palette是通过drawer2DMMQ和我们qxGEF里的囑Ş没什么两栗?br />
/** * Returns the PaletteRoot for the palette viewer. * @return the palette root */
protected abstract PaletteRoot getPaletteRoot();
一看palette entry的文档就明白了，其实它就?palette的模型?br />
/** * Root class (statically) for the palette model. * * @author Pratik Shah */public class PaletteEntry {/** * A listener can only be added once. Adding it more than once will do nothing. * @param listener the PropertyChangeListener that is to be notified of changes * @see java.beans.PropertyChangeSupport#addPropertyChangeListener( * java.beans.PropertyChangeListener) */public void addPropertyChangeListener(PropertyChangeListener listener) { listeners.removePropertyChangeListener(listener); listeners.addPropertyChangeListener(listener);}/** * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#activate() */public void activate() { super.activate(); PaletteEntry model = (PaletteEntry)getModel(); model.addPropertyChangeListener(this); traverseChildren(model, true);}模型的修改必定会被通知?edit part 里，它再Ҏ具体的情况对viewerq行更新Q见下：
/** * @see java.beans.PropertyChangeListener#propertyChange(PropertyChangeEvent) */public void propertyChange(PropertyChangeEvent evt) { String property = evt.getPropertyName(); if (property.equals(PaletteContainer.PROPERTY_CHILDREN)) { traverseChildren((List)evt.getOldValue(), false); refreshChildren(); traverseChildren((List)evt.getNewValue(), true); } else if (property.equals(PaletteEntry.PROPERTY_LABEL) || property.equals(PaletteEntry.PROPERTY_SMALL_ICON) || property.equals(PaletteEntry.PROPERTY_LARGE_ICON) || property.equals(PaletteEntry.PROPERTY_DESCRIPTION)) refreshVisuals();}明白??说了那么多其实只要一名句话啦Q修改一下palette root里palette entry的内容GEF ׃自动的将palette里的表现更新了。在Dengues的项目里Q我在GEFComponentEditor.java里加入以下方法，便可以了Q?br />
/**
* Reset the content of the palette root will cause palette viewer be refreshed.
*
* yzhang Comment method "refreshPalette".
*/
public void refreshPalette() {
List<PaletteContainer> containers = new ArrayList<PaletteContainer>(root.getChildren());
for (PaletteContainer element : containers) {
if (element instanceof PaletteGroup) {
continue;
}
root.remove(element);
}
CompEditorPaletteFactory.create(factory, root);
}
* Reset the content of the palette root will cause palette viewer be refreshed.
*
* yzhang Comment method "refreshPalette".
*/
public void refreshPalette() {
List<PaletteContainer> containers = new ArrayList<PaletteContainer>(root.getChildren());
for (PaletteContainer element : containers) {
if (element instanceof PaletteGroup) {
continue;
}
root.remove(element);
}
CompEditorPaletteFactory.create(factory, root);
}
关于q个Ҏ是如何调用的Q这涉及到另外一个话题了Q见《如何解x件之间@环依赖的问题》?br />
K字好累。Han hanhan .....
张飞刀(Dengues Studio) 2007-10-26 13:32 发表评论
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